12th International Workshop on Semiconductor Pixel Detectors for Particles and Imaging (PIXEL2026)

Contribution List

33. 4D-Tracking with Resistive Silicon Detectors

Federico Siviero (Universita e INFN Torino (IT))

Timing with pixels

ORAL

The Resistive Silicon Detectors (RSDs) are a recent innovation in the field of silicon sensors for 4D-tracking applications. The RSD design combines the LGAD technology with resistive read-out, yielding fast and large signals which are shared between multiple read-out pads. Thanks to their characteristics, RSDs can accurately reconstruct the hit position of an ionizing particle, achieving a...

109. A Comparative Study of Neural-Network Architectures for Embedded On-Chip Inference For Future MAPS Pixel Detectors

Jelena Lalic (Massachusetts Inst. of Technology (US))

Monolithic sensors

POSTER

On-detector data reduction has become a primary constraint for next-generation monolithic active pixel sensors (MAPS) operated in continuous readout, which are used in particle physics to realize high-resolution, low-material-budget tracking and vertexing detectors. As pixel pitches decrease and hit rates increase, the bandwidth, power, and material-budget cost of this data transport is...

46. A Cuboid Single-Layer Detector Array for 3D Vertex Reconstruction

Angela Gligorova (Politecnico di Milano (IT))

High energy and nuclear physics experiments

POSTER

Particle tracking in high energy physics almost exclusively relies on multi-layer detector systems, such as those built for large-scale experiments, achieving impact parameter resolutions of tens of micrometers. The sensors in these detectors are typically positioned as close as a few millimeters to the interaction point. However, for experiments that do not impose such stringent requirements...

24. A MAPS Silicon Vertex Tracker for the ePIC experiment at the Electron-Ion Collider

Zhenyu Ye (Lawrence Berkeley National Lab. (US))

High energy and nuclear physics experiments

ORAL

The Electron-Ion Collider (EIC) is a new nuclear physics facility that will be built at Brookhaven National Laboratory to study properties of nuclear matter and the strong interaction through polarized electron-proton and electron-ion collisions. Vertex and tracking detectors with high momentum and pointing resolutions are critical to fulfill the requirements of the EIC physics program. A...

34. A p-type pinned photogate as an innovative electron detector for transmission electron microscopes (TEM)

olivier marcelot

Applications in biology, medical imaging

ORAL

Direct electron detectors are developed since 2010 [1], and rely on CMOS image sensors including a surface photodiode with an enclosed layout design offering a good radiation hardness. Because of the strong lateral spread of the electron distribution generated by the microscope beam, these detectors are back-thinned to 10-20 µm with the aim to ensure an acceptable MTF [2]. As a major drawback,...

91. A short history of 3D modules in ATLAS

Claudia Gemme (INFN Genova (IT))

High energy and nuclear physics experiments

ORAL

For the High Luminosity upgrade of the Large Hadron Collider, the current ATLAS Inner Detector will be replaced by an all-silicon Inner Tracker (ITk). The new tracker has been designed to face the challenging environment associated with the high number of collisions per bunch crossing and the expected large integrated luminosity. It consists of a Pixel detector in the innermost part and a...

93. A Total-Body PET Scanner with Xenon-Doped Liquid Argon, Cryogenic SiPMs, and ASIC Readout Electronics

Dr Masayuki Wada (AstroCent: Nicolaus Copernicus Astronomical Centre, PAN, Poland)

Applications in biology, medical imaging

POSTER

The 3Dpi scanner is a novel Total-Body Time-of-Flight Positron Emission Tomography (TOF-PET) system that combines xenon-doped liquid argon (LAr) scintillation, silicon photomultipliers (SiPMs), and custom ASIC-based cryogenic readout electronics. The project aims to enable ultra-low-dose PET imaging, particularly for pediatric patients, pregnant women, and applications requiring repeated...

106. A Wide-Field X-ray Imaging System Based on the Event-Driven SOI Pixel Detector XRPIX for Lunar Elemental Mapping

Hikaru Uebayashi

Integration in detection modules and structures

POSTER

The geological asymmetry between the lunar near and far sides remains a key unresolved problem in planetary science. Resolving its origin requires the crystallization ages and spatial distribution of KREEP (Potassium, Rare Earth Elements, and Phosphorus), the final solidification product of the Lunar Magma Ocean. Such age analysis demands rover sampling, but selecting suitable landing sites...

81. ALICE ITS3 MOSAIX multi-Gbps wafer-level testing and yield characterisation

Gregor Hieronymus Eberwein (Massachusetts Inst. of Technology (US))

Monolithic sensors

POSTER

The ALICE Inner Tracking System (ITS3) upgrade introduces the first vertex detector based on wafer-scale, reticle-stitched, bent Monolithic Active Pixel Sensors (MAPS). The concept is being adopted for the Silicon Vertex Tracker (SVT) of the future ePIC detector at the Brookhaven National Laboratory (BNL) based Electron Ion Collider (EIC). The MOnolithic Stitched Active pIXel sensor (MOSAIX),...

10. An 8-Channel Event Data Builder in 55nm CMOS process for 10.24 Gbps ToF-PET Detector Readout

guoxiang zhang (ccnu)

Electronics

POSTER

We present the design and implementation of an Event Data Builder module integrated into the FPMROC chip, specifically optimized for high-performance Time-of-Flight Positron Emission Tomography (TOF-PET) detectors, based on a 55 nm CMOS process. The module serves as a critical bridge between multi-channel high-precision Time-to-Digital Converters (TDCs) and high-speed serial transmission...

40. Application of ALPIDE Pixel Detectors in SFQED Experiments

Oleksandr Borysov (Weizmann Institute of Science (IL))

High energy and nuclear physics experiments

POSTER

Strong-Field Quantum Electrodynamics (SFQED) experiments probing nonlinear Breit–Wheeler pair production require precise detection and reconstruction of electron–positron pairs generated in ultra-intense laser–matter interactions. We present the application of ALPIDE pixel sensors arranged in a telescope configuration as a compact, high-resolution tracking system for positron detection in...

113. Architecture-Dependent Spatial Resolution and DQE Tradeoffs in Hybrid Pixel Detectors

Clara Fleisig (Department of Physics, Cornell University and School of Applied and Engineering Physics, Cornell University)

Photon science applications

POSTER

Hybrid Pixel Detector (HPD) ASIC architectures are broadly categorized as analog-integrating or counting, depending on whether deposited charge is recorded as continuous-valued signals or binary pixel-hit measurements. We quantify how these differing encoding schemes produce tradeoffs in spatial resolution and DQE for 60 keV to 300 keV electron detection. Detective Quantum Efficiency (DQE) and...

52. Assembly, quality control and electrical testing of detector modules for the High Granularity Timing Detector

Louis D'Eramo (LPCA - CNRS/IN2P3 (FR))

Timing with pixels

POSTER

The High Granularity Timing Detector (HGTD) is an upgrade of the ATLAS experiment for the High-Luminosity LHC, designed to instrument the forward region of the detector with precision timing capabilities. By measuring the time of arrival of charged particles with a resolution of 30–50 ps per track, the HGTD will significantly mitigate pileup effects and improve the reconstruction of physics...

110. ATLASPix3 testbeam characterisation

Harald Fox (Lancaster University (GB)), Lingxin Meng (Lancaster University (GB)), Riccardo Zanzottera (Università degli Studi e INFN Milano (IT))

Monolithic sensors

POSTER

ATLASPix3.1 is made on a low doped substrate of 200 Ω cm using a commercial 180 nm High Voltage CMOS process of TSI. The reticle size is 2.0 × 2.1 cm^2, consisting of 132 columns and 372 rows of 150 × 50 μm^2 pixels. It is part of a family of sensors that includes MuPix for the Mu3e experiment and MightyPix for LHCb, and is under investigation for a future experiment at a Higgs factory.
For...

111. Bent BabyMOSS: Performance Studies of flexible MAPS sensors for the ALICE ITS3 Upgrade

Berkin Ulukutlu (Technische Universitaet Muenchen (DE))

High energy and nuclear physics experiments

POSTER

The Inner Tracking System 3 (ITS3) upgrade of the ALICE experiment at the LHC will employ wafer-scale Monolithic Active Pixel Sensors (MAPS) thinned to 50 μm and bent into cylindri- cal layers, a geometry that is unprecedented for silicon vertex detectors. An overarching R&D campaign is underway to characterise the performance of bent sensors across successive proto- types, establishing the...

51. Bringing ITS3 to Reality: MOSAIX characterization and System Qualification for ALICE

Isabella Sanna (CERN)

High energy and nuclear physics experiments

ORAL

During LHC Long Shutdown 3 the ALICE experiment will install the Inner Tracking System 3 (ITS3), replacing the three innermost ITS2 layers with the first truly cylindrical silicon vertex detector based on bent wafer-scale Monolithic Active Pixel Sensors (MAPS). Fabricated in a 65 nm CMOS process, the sensors are thinned to 50 \textmu m and bent to radii of 19, 25, and 32 mm, enabling...

57. CERN Module Production of Planar Silicon Sensors for the Outer Barrel of the ATLAS Inner Tracker

Jan Malamant (University of Oslo (NO))

Integration in detection modules and structures

POSTER

CERN's current accelerator complex, the Large Hadron Collider (LHC), will be upgraded to the High-Luminosity LHC (HL-LHC) in the period 2026-2030. To study fundamental physics at an unprecedented level of precision, the HL-LHC will reach an instantaneous luminosity of $7.5\cdot10^{34}\:\mathrm{cm}^{-2}\:\mathrm{s}^{-1}$. Consequently, a harsher radiation environment of...

78. Challenges and lessons learned from the design of MOSAIX, the Wafer-Scale Monolithic Active Pixel Sensor for ALICE ITS3

Giacomo Ripamonti (CERN)

Monolithic sensors

ORAL

MOSAIX is a 26.6 cm x 1.96 cm wafer-scale Monolithic Active Pixel Sensor (MAPS) designed in a 65nm imaging CMOS technology. Developed as a full-fledged prototype for the ALICE Inner Tracking System 3 (ITS3), it is a pioneering project for the High Energy Physics and MAPS communities, as it is a true system-on-a-chip including wafer-scale data transmission and power distribution. The absence of...

108. Characterisation of pixel test structures for the ALICE 3 Inner Tracker

Isis Hobus (Nikhef National institute for subatomic physics (NL))

Monolithic sensors

POSTER

A major upgrade of the ALICE experiment is foreseen for Run 5 of the LHC. The new retractable Vertex Detector (VD) is a crucial component of the upgraded experiment and will achieve an unprecedented pointing resolution owing to its close proximity to the interaction point, with three layers installed inside the beam pipe, in combination with a low material budget. Monolithic active pixel...

122. Characterization of APTS with large pitch for the ALICE 3 Outer Tracker

Mr Lars Döpper (University of Bonn (DE))

Monolithic sensors

ORAL

ALICE 3 is a completely new heavy-ion experiment at the LHC, proposed as the successor and next generation of the current ALICE experiment. To utilize the LHC to its full potential as a heavy-ion collider during Run 5, a completely new detector is required and envisioned to start operation after the Long Shutdown 4 in 2036.

Charged particles will be tracked by the Inner and Outer Tracker...

54. Characterization of Enhanced Lateral Drift (ELAD) Sensor Prototypes

Judith Christina Schlaadt (Deutsches Elektronen-Synchrotron (DE))

High energy and nuclear physics experiments

POSTER

The development of vertex and tracking detectors for future lepton colliders faces various challenges regarding time and position resolution while maintaining a low material budget and the capability to process high particle rates. In this context, one approach to improve the spatial resolution is to utilise the effect of charge sharing. Here, the cluster size indicates the degree of charge...

92. Characterization of Silicon Electron Multiplier Pixel Test Structures with a Novel Internal Gain Mechanism

Mahiro Kobayashi (University of Tsukuba (JP))

Timing with pixels

POSTER

Tracking detectors for high-luminosity hadron colliders must reconstruct tracks from the hard-scattering vertex under severe pile-up. Pixel detectors with timing information can mitigate pile-up effects.
Capacitive-Coupled Low-Gain Avalanche Diodes (AC-LGADs) have $O(10)~\mu\mathrm{m}$ spatial and $O(10)~\mathrm{ps}$ timing resolution. However, radiation-induced acceptor removal reduces the...

123. Columnar-Electrode 3D Pixel Sensors for 4D Tracking in High Energy Physics Experiments

Austin Schmier (Universita degli Studi di Trento and INFN (IT))

Timing with pixels

ORAL

In the coming years, collider experiments will push the boundaries on luminosity and collision energy, resulting in increasingly demanding event pileup and radiation levels. To address these challenges, the concept of 4D tracking has gained attention in recent years, calling for detectors capable of providing excellent spatial and time resolution while maintaining outstanding radiation...

2. Commissioning of the Mu3e Vertex Detector towards Phase I Operation

Thomas Senger

High energy and nuclear physics experiments

ORAL

The Mu3e experiment is designed to search for the charged lepton flavour violating decay $\mu^+ \to e^+ e^- e^+$ with a sensitivity of $2 \times 10^{-15}$ in Phase I and $10^{-16}$ in a future Phase II. Phase I, currently under construction, will be carried out at the $\pi$E5 beamline at PSI using an intense DC surface muon beam of $10^8\,\mu^+/\mathrm{s}$.
The low momentum of the decay...

20. Construction and Commissioning of the Mu3e Vertex Detector

Afiq Azraei Bin Rishinsa (Heidelberg University (DE))

Integration in detection modules and structures

POSTER

The Mu3e Experiment at the Paul Scherrer Institut (PSI) aims to probe for the highly suppressed Charged Lepton Flavour Violating $\mu \rightarrow e^+e^-e^+$ decay with a Phase-I goal of single event sensitivity down to $2 \times 10^{-15}$ on the branching ratio. The challenge of low momentum electrons up to 53 MeV/c from the muon decay at rest necessitates an ultra-light pixel tracking...

9. Construction and integration of the CMS Tracker Forward Pixel (TFPX) detector

Jose Andres Monroy Montanez (Cornell University (US))

Integration in detection modules and structures

POSTER

The CMS experiment is preparing a new Inner Tracker for operation at the High-Luminosity Large Hadron Collider, where substantially increased particle fluxes, radiation exposure, and data throughput demand a step change in detector capability. Addressing these conditions requires an integrated approach that balances radiation hardness, precision mechanics, minimal material, efficient thermal...

64. Current Status and Future Prospects of X-ray Spectroscopic Performance of the SOI Pixel Detector ``XRPIX''

Prof. Koji Mori (University of Miyazaki)

Astrophysics applications

POSTER

We are developing an SOI pixel detector, named ``XRPIX'', as a next-generation large-area imaging spectrometer for X-ray astronomy. Compared with conventional X-ray charge-coupled devices (CCDs), XRPIX provides comparable imaging performance while significantly outperforming them in timing resolution and throughput. Although improving spectroscopic performance has long been a challenge, it has...

104. Design and Implementation of a Programmable On-Chip Sequencer for the Event-Driven SOI Pixel Detector XRPIX

Yusuke Komura (Kyoto University)

Electronics

ORAL

We are developing XRPIX, an X-ray imaging spectrometer for astronomy based on Silicon-on-Insulator CMOS technology. CCDs are widely used, offering excellent energy resolution, but their frame-based readout limits time resolution to $\sim$1 s, restricting certain applications. Notably, non-X-ray background rejection using anti-coincidence techniques requires a time resolution of $\sim$10...

11. Design and optimization of MAPS for future collider applications using a data driven fast simulation approach

Dumitru-Vlad Berlea (Deutsches Elektronen-Synchrotron (DE))

Monolithic sensors

POSTER

Monolithic Active Pixel Sensors offer advantages over current hybrid imaging sensors both in terms of increased tracking performance due to lower material budget but also in terms of ease of integration and construction costs. The increasing requirements of future collider experiments are pushing the technology towards smaller process nodes, higher granularity and denser readout logic. The...

19. Detecting photons in radiative Bhabha interaction with Si-strip and LYSO crystals at future e+e- colliders

Suen Hou (Academia Sinica (TW))

Photon science applications

POSTER

The next generation of e+e- colliders is proposed with the detection of Bhabha events in the forward region to provide luminosity measurements of the QED cross section with a precision approaching 10^-4. The detection of photons in Bhabha events provides a tool for validating higher-order corrections in theory.

We propose the Forward Detector for the Super Tau Charm Facility with the √s...

42. Development and Beam Validation of a Silicon Strip ΔE Detector for Low-Energy Inverse Kinematics Experiments at RAON

HyeYoung Lee (Institute for Basic Science (IBS), Republic of Korea)

High energy and nuclear physics experiments

POSTER

Silicon strip detectors are widely used in ΔE–E telescope systems for particle identification in nuclear physics experiments. For the ELARK (Elastic Scattering Detector Array in Inverse Kinematics) experiment at the RAON-KOBRA facility, a dedicated front-end ΔE detector was required to improve the detection of low-energy charged particles. Conventional 1 mm-thick silicon detectors can stop a...

31. Development and Characterization of Sensors and Electronics for the ATLAS High-Granularity Timing Detector

Louis D'Eramo (LPCA - CNRS/IN2P3 (FR))

Timing with pixels

POSTER

The increase of the instantaneous luminosity delivery to the ATLAS Detector during HL-LHC operation will result in 200 simultaneous collisions at every 25 ns. Separating the hard scatter from the pile-up requires a spatial resolution impossible to be attained at rapidities above |η| > 2.4 by the new ATLAS semiconductor tracker (ITk), which will extend the tracking coverage in ATLAS up to |η| <...

116. Development and Initial Beam Test of a Timepix3-Based Pixel Detector System for $\mu$SR Measurements with Track Reconstruction

Seiso Fukumura (Niigata University)

Electronics

POSTER

Muon spin rotation/relaxation/resonance ($\mu$SR) measurements are widely used to study local magnetic properties in materials through the time evolution of decay-positron counts from muons. In conventional $\mu$SR measurements, decay positrons are detected over the entire beam spot, and the muon decay position cannot be determined with sufficient precision from the detector information. By...

79. Development and Performance Evaluation of a DSSD-Based Charged-Particle Tracker for the Lunar-RICheS Space-Radiation Spectrometer

Senkai Yoshida (Tokyo University of Science)

Astrophysics applications

ORAL

As crewed deep-space exploration, including planned missions to the Moon and Mars, continues to advance, the long-term management of astronaut radiation exposure has become a critical issue. In particular, in-situ measurements of protons and heavy ions in the energy range from 15 MeV/n to 2 GeV/n, a range highly relevant to human radiation exposure, remain limited in the space environment....

120. Development of a Graphene Enabled Amorphous Selenium Charge and Light (Q+L) Sensor

Iakovos Tzoka (University of Texas at Arlington, Brookhaven National Lab)

High energy and nuclear physics experiments

POSTER

Large scale noble element time projection chambers (TPCs) are a cornerstone technology in modern high energy physics, enabling precision measurements in neutrino physics, dark matter searches, and other rare event experiments. Future detector programs require increasingly large active areas and highly segmented readout systems, creating new challenges in detector instrumentation, scalability,...

59. Development of a Large-Format XRPIX with Uniform Spectroscopic Performance: Improved Power Distribution Design and Performance Characterization

Ayaki Takeda (University of Miyazaki)

Astrophysics applications

POSTER

For applications in X-ray astronomical observatories, we have been developing a series of monolithic active pixel sensors, referred to as XRPIXs, based on silicon-on-insulator (SOI) pixel technology. XRPIX devices feature event-driven readout enabled by in-pixel comparator circuits, providing high time resolution and effective rejection of non-X-ray background.
Large-format XRPIXs are...

28. Development of a MALTA-Based Beam Telescope at KEK

Yuto Hama (University of Tsukuba (JP))

Electronics

POSTER

We are developing a MALTA-based beam telescope at the KEK PF-AR test beam facility in Japan. The telescope aims to provide a flexible and accessible platform for evaluating silicon tracking detectors, including MAPS, by simplifying beam test measurements for users bringing their own devices under test. The system design is based on the MALTA telescope operated at the CERN SPS beam facility and...

84. Development of an SOI-GAGG Compton Camera for High-Resolution Gamma-Ray Imaging

BINH HOANG DANG

Applications in biology, medical imaging

ORAL

The development of simultaneous imaging of positron emission tomography (PET) and single photon emission computed tomography (SPECT) radionuclides is integral to the advancement of nuclear medicine. We have been developing a Compton camera that reconstructs the incident direction of the gamma rays by measuring the energies and interaction positions of Compton-scattered photons within a...

70. Development of Compton-PET utilizing TlBr semiconductor detector and SOI pixel detector

Tsubasa Komaki (University of Tokyo)

Applications in biology, medical imaging

ORAL

In conventional nuclear medicine imaging, when different radionuclides are used, they must be imaged separately, which results in misalignment of organs and inconsistencies in imaging timing. To address this issue, simultaneous multi-nuclide imaging has attracted significant attention, as it enables the observation of multi-molecular dynamics within the same spatial coordinates and temporal...

63. Development of Data Acquisition Software for Dectris Eiger2X Detector with STARS Framework

Dr Ryutaro Nishimura (High energy accelerator research organization, Institute of Materials Structure Science, Photon Factory)

Photon science applications

POSTER

At the Photon Factory AR-NW14A beamline, we are developing a high-speed time-resolved X-ray solution scattering method using the Dectris Eiger2X detector.
This method employs the detector's "double-gating" mode, which uses two independent counters in each pixel to enable synchronized image acquisition with a minimum interval of 100 ns.
This capability eliminates the need for a physical...

62. Development of Fast and Flexible Single-Die Hybridisation Technologies for Pixel Detectors

Dr Ahmet Lale

Integration in detection modules and structures

POSTER

Hybrid pixel detector developments strongly rely on fast, reliable and cost-effective interconnection technologies, especially during prototyping phases. Conventional wafer-level hybridisation techniques provide excellent performance but require complex industrial infrastructures, long turnaround times and high production costs. These constraints significantly limit rapid design iterations and...

26. Development of Fine-Pitch SOI Pixel Sensor for Astrophysical Hard X-ray Polarimetry

Kouichi Hagino (University of Tokyo)

Astrophysics applications

ORAL

We have developed a fine-pitch silicon-on-insulator (SOI) pixel sensor for astrophysical hard X-ray polarimetry above 10 keV. It is a monolithic Si sensor composed of CMOS pixel circuitry and a 300 μm-thick, high-resistivity Si sensor separated by an oxide layer, based on SOI technology. We utilized the designs and technologies developed for the X-ray SOI pixel sensor, XRPIX, to achieve good...

121. Development of Ultra-Small-Pitch 3D Trench-Electrode Pixel Sensors

Jixing Ye

Timing with pixels

ORAL

In order to meet the demanding conditions foreseen by future accelerator experiments, the concept of 4D tracking has developed in recent years. Detectors capable of excellent spatial and timing resolution while simultaneously tolerating large radiation doses will be necessary. Due to the uniform electric field and small inter-electrode spacing, 3D trench-electrode sensors represent one of the...

119. Developments of the IGNITE project on 4-dimensional pixels

Adriano Lai (Universita e INFN, Cagliari (IT))

Timing with pixels

ORAL

The INFN IGNITE project is developing technical solutions in CMOS 28-nm technology for the next generation of trackers at colliders, which require high time resolution at the pixel level (<50 ps RMS), pixel size around 50 µm, and system power density in the range 1-2 W/cm2, depending on the specific cooling technique adopted.
A series of modular ASICs, optimized to the read-out of high-time...

45. Direct observation of weighting field driven timing non-uniformities in silicon pixel sensors

Artem Shepelev (University of Birmingham (GB))

Timing with pixels

ORAL

In this work we present micron-scale measurements of the timing response of silicon pixel sensors read out by the TDCpix ASIC and measured with the high-resolution Timepix4 beam telescope at the CERN SPS H8 beam line. The telescope provides track reconstruction with approximately 2um spatial resolution, enabling detailed track-referenced studies of Time-of-Arrival (ToA) and time resolution...

15. Electron/Ion Discrimination Using Pulse-Shape Analysis in Thick Silicon Detectors

Vincent THOMAS (IRAP/CNRS)

Astrophysics applications

POSTER

Compact charged-particle spectrometers for space applications commonly rely on stacks of silicon detectors, absorbers, magnetic deflection, and anticoincidence logic to separate electrons from ions. Although robust, such architectures may suffer from cross-contamination between particle channels, for instance when particles are partially stopped, scattered, or misidentified through indirect...

83. Electronic system design of the Mighty-Pixel detector

Klaas Padeken (University of Bonn (DE)), Lukas Witola (Technische Universitaet Dortmund (DE))

Electronics

POSTER

The Mighty-Pixel detector, a HV-MAPS-based silicon pixel system for the LHCb Upgrade II main tracker, requires a highly integrated electronic architecture to meet the constraints of low material budget, high channel density, and operation in a radiation environment. The design of the electronic system must ensure reliable data transmission, precise timing distribution, and stable power...

76. Evaluation of HV-MAPS in the LFoundry 150$\;$nm and TSI 180$\;$nm process for the LHCb Mighty Tracker

Ruben Kolb (Heidelberg University (DE))

Monolithic sensors

POSTER

During LHC's Run 5, the instantaneous luminosity at LHCb will increase by a factor 5, necessitating a major upgrade of all sub-detectors. With this Upgrade II of the LHCb detector, the so-called Mighty Tracker will replace the current scintillating fiber detector (SciFi) as a main tracker to cope with the increased rates and radiation damage. While the outer region will be instrumented with an...

66. Evaluation of the sub-pixel response of a novel HV-CMOS pixel sensor AstroPix

Koume Sakano

Monolithic sensors

POSTER

All-sky observations of MeV gamma rays are important for understanding high-energy astrophysical phenomena such as gamma-ray bursts and blazars. However, there is currently no satellite capable of sensitive observations in the MeV band. To address this situation, the next-generation all-sky MeV gamma-ray mission concept AMEGO-X is being proposed. AMEGO-X uses a Compton camera consisting of a...

49. Evaluation of the X-ray Response of the SOI Pixel Detector XRPIX in SUIM at Elevated Temperatures for Upper-Atmosphere observations

Yuto Takeshima (Kindai University)

Astrophysics applications

ORAL

We have developed SUIM (Soipix for observing Upper atmosphere as ISS experiment Mission), a dedicated X-ray camera for observing the upper atmosphere at altitudes of ~ 60–110 km. SUIM was launched in May 2026 and will be installed outside the International Space Station in the ram direction to observe the Earth’s limb. By measuring the cosmic X-ray background transmitted through the upper...

21. Event-Driven Readout, Background Subtraction and Adaptive Configuration of a Programmable SPAD Sensor for Muon Detection

Mrs Fernanda Zapata Bascuñán (Institute of Technologies in Detection and Astroparticles (ITeDA))

Astrophysics applications

ORAL

An adaptive reconfiguration system for ANDESPix, a fully integrated and fully digital CMOS photodetector ASIC based on a Single-Photon Avalanche Diode (SPAD) array, is presented. The reconfiguration routine processes the raw event stream in three stages: dark count rate filtering, removal of always on defective pixels, and muon-event isolation via background subtraction. Muon events are...

89. Experimental Characterization of Segmented Trench-Isolated 4H-SiC LGADs

Radek Novotny (Czech Technical University in Prague (CZ))

Radiation tolerance

ORAL

Low Gain Avalanche Detectors (LGADs) are a key technology for precision timing in high-energy physics. The wide-bandgap semiconductor 4H-SiC offers significant advantages over silicon, including superior radiation hardness, high breakdown field, low leakage current, and excellent thermal stability.

This contribution presents the first experimental characterization of segmented...

117. Extending the CITIUS X-ray imaging detector to heavy charged particle and neutron imaging

Haruki Nishino

Photon science applications

ORAL

CITIUS is a charge-integrating silicon pixel detector developed for the upgrade of the synchrotron radiation facility SPring-8. Although it was originally designed for direct X-ray imaging, its 650-micrometer-thick silicon sensor provides a long carrier drift distance, which is expected to produce charge sharing among neighboring pixels for heavy charged particles. This charge sharing enables...

98. First qualification of the ARCADIA Fully Depleted MAPS for space applications

Sabrina Ciarlantini (INFN Padova)

Monolithic sensors

ORAL

The ARCADIA Main Demonstrator 3 (MD3) is a Fully Depleted Monolithic Active Pixel Sensor (FD-MAPS) fabricated using a custom LFoundry 110nm CIS technology node. The custom backside process allows for the creation a uniform electric field across the entire 200 $\mu$m substrate thickness enabling its full depletion. The MD3 integrates a $512 \times 512$ pixel array with a 25 $\mu$m pitch and an...

86. Flexible Kapton-Aluminum Circuits for Silicon Pixel Detector Readout: Design, Signal Integrity Optimization and Experimental Validation

Luca Baudino (Universita e INFN Torino (IT))

Electronics

ORAL

This work presents the design of a flexible circuit based on a Kapton-aluminum layered structure for integration with an ALPIDE silicon pixel detector, a monolithic active pixel sensor developed for the ALICE Inner Tracking System (ITS). The design and fabrication were carried out in collaboration with Fondazione Bruno Kessler (FBK), which has been conducting R&D on this topic for four years,...

69. Floating Transfer Gate-based CMOS pixel reaching 0.15 rms noise electrons

ajit kumar kalgi

Monolithic sensors

ORAL

Photon-starved imaging in scientific applications, such as astronomy and medical science, demands image sensors with extremely low read noise. Read noise lower than 0.3 e-RMS is required to match true single photon detection [1].
We previously reported a device and circuit-level techniques to reduce pixel readout noise in integrating CMOS image sensors [2]. Such included classic CMOS 4T...

112. Frameless Energy-Resolving Pixel Readout with Data-Stream-Based Charge-Sharing Compensation

Piotr Maj (Brookhaven National Laboratory)

Electronics

ORAL

The 3FI ASIC is an event-driven, energy-resolving pixel detector readout developed for synchrotron X-ray fluorescence measurements. The prototype contains a 32 × 32 matrix of 100 µm pixels. Each pixel includes a low-noise analog front-end, discriminator, peak detector, and sample-and-hold circuitry.
One of the key functionalities presented here is a novel approach towards the charge-sharing...

73. From particle collision to detector back-end: simulation flow applied to the development of the next generation of monolithic active pixel sensors

Elio Sacchetti (Centre National de la Recherche Scientifique (FR))

Monolithic sensors

POSTER

New generation of Monolithic Active Pixel Sensors (MAPS) have to address various aspects of the requirements of HEP experiments : timing, spatial resolution, radiation hardness. Development and use of complex simulation tools are essential to succeed in the optimization of MAPS R&D, where sensor performance is targeted at specific HEP experiments.

MANTA (Monolithic Asynchronous sensor for...

96. Full-Angular-Range Time-Differential Perturbed Angular Correlation Analysis Using a Circular Array of GFAG Pixel Detectors

Mizuki Uenomachi

Applications in biology, medical imaging

POSTER

The time-differential perturbed angular correlation (TDPAC) method is widely used to probe local electromagnetic fields and related interactions in condensed matter research. It utilizes the time-dependent angular correlation of cascade gamma rays emitted successively from radioactive nuclei. When the lifetime of the intermediate nuclear state is sufficiently long, interactions between the...

23. High-Throughput 4D Cluster Reconstruction for Sparse, Data-Driven Pixel Detectors using GPU Acceleration

Tomas Celko (Czech Technical University in Prague (CZ))

High energy and nuclear physics experiments

ORAL

Next-generation hybrid-pixel detectors and timing sensors generate high-rate, asynchronous data streams that challenge traditional reconstruction pipelines. In these data-driven regimes, conventional Connected Component Labeling (CCL) algorithms - originally designed for dense image frames -suffer from significant overhead and temporal aliasing when forced to bin sparse hits into discrete time...

115. Identification of Sensor cleavage in ITk Pixel Quad Modules

Anna Raquel Petri (Università degli Studi e INFN Milano (IT))

High energy and nuclear physics experiments

POSTER

Mechanical cleavage of multi-chip modules is possible failure mode of multi-chip hybrid pixel detectors with thin sensor layers. It has been observed in 44 planar ITk pixel quad production modules, corresponding to approximately 1.2% of the current quad module production. Since many affected devices show no evident visible signature during routine inspection, the analysis of IV characteristics...

85. Investigation of the Physical Mechanisms Responsible for Differences in Pulse Height Distributions between Front- and Back-Illuminated X-ray SOI-CMOS Sensor (XRPIX)

Mr Hikaru Sato (Tokyo University of Science)

Monolithic sensors

ORAL

We are developing "XRPIX," a next-generation X-ray Silicon-On-Insulator (SOI) pixel detector achieving <10 µs time resolution while maintaining spectroscopic performance rivaling standard X-ray CCDs. Although back-illumination is essential for high quantum efficiency in X-ray astronomy, it degrades XRPIX's spectroscopic performance compared to front-illumination.
To investigate the...

75. Irradiation Studies on SiGe HBT Prototypes

Benjamin Weinlaeder (Heidelberg University (DE))

Radiation tolerance

ORAL

A promising approach to improve the time resolution of silicon pixel sensors into the sub-nanosecond regime is the use of BiCMOS technology. The integration of SiGe heterojunction bipolar transistors (HBTs), characterised by their high cut-off frequency and amplification, enables fast analogue front-end electronics and can additionally support high-speed data transmission. Future particle...

27. Layout optimisation of Monolithic Active Pixel Sensors for vertex detectors at future lepton colliders

Anastasiia Velyka (Deutsches Elektronen-Synchrotron (DE))

Monolithic sensors

ORAL

Vertex detectors at future lepton colliders are required to meet several challenging performance targets. Monolithic active pixel sensors (MAPS), in particular those produced in the 65 nm TPSCo process, are a promising technology for this application, but require further optimisation to achieve high performance in spatial resolution, timing resolution, and efficiency simultaneously.
MAPS...

4. Lessons learned from the ATLAS Pixel Detector operation at LHC in Phase-1

Marco Battaglia (University of California,Santa Cruz (US))

High energy and nuclear physics experiments

ORAL

After more than 15 years of operation, the ATLAS Pixel Detector will take its final data this June before being replaced with a new all-silicon detector (ITk) during LHC Long Shutdown 3. Its original part, consisting in 3 layers of planar pixel sensor was continuously operating well since the start of LHC collisions in 2008, while its innermost layer, the Insertable B Layer (IBL) at about 3 cm...

13. MAPS-based Upstream Pixel Tracker for LHCb upgrade II

Carlos Vazquez Sierra (Universidade da Coruña (ES))

High energy and nuclear physics experiments

ORAL

The LHCb Upstream Tracker (UT), a silicon micro-strip detector introduced during Upgrade I and operational since Run 3 of the Large Hadron Collider, is a key component for track reconstruction and ghost track suppression. Looking ahead, LHCb Upgrade II is scheduled for the LHC Long Shutdown 4, with the goal of fully exploiting both the flavour physics programme and the heavy-ion physics...

82. Mighty-Pixel: A large area HV-MAPS tracker for LHCb Upgrade II

Klaas Padeken (University of Bonn (DE)), Lukas Witola (Technische Universitaet Dortmund (DE))

High energy and nuclear physics experiments

POSTER

In order to exploit the full physics potential of the upcoming high luminosity phase of the LHC (HL-LHC), LHCb is preparing for Upgrade II in 2034, targeting operation at instantaneous luminosities of up to $1.0\cdot10^{34}\,\mathrm{cm^{-2}s^{-1}}$, and allowing the experiment to accumulate an integrated luminosity of $300\,\mathrm{fb^{-1}}$. This increase in instantaneous luminosity by a...

101. Model-Informed Signal Interpretation for the XSPA High-Rate Hybrid Pixel Detector

Dr Yasukazu Nakaye (Rigaku Corporation)

Photon science applications

POSTER

Recent developments in hybrid pixel detectors have enabled stable operation across a wide X-ray energy range, including soft X-ray detection under practical experimental conditions. However, interpretation of detector response under high-frame-rate operation remains non-trivial due to charge sharing, sparse event statistics, and dynamic photon flux.
In this work, we present a model-informed...

50. Monochromator: a spatial‑energy reference for calibrating photon-counting detectors

Phi Truong Hoai Bao (Institute of Physics, Vietnam Academy of Science and Technology. Joint Institute for Nuclear Research)

High energy and nuclear physics experiments

POSTER

Energy calibration of photon-counting detectors (PCDs) remains challenging due to variations in gain and offset. Monochromatic X-ray sources are emerging as useful equipment for conducting this procedure [1,2]. Unlike radioactive isotopes, X‑ray fluorescence (XRF), they offer a tunable source working in a continuous energy range [3]. In addition, they are suitable for routine laboratory use,...

97. MONOLITH - Picosecond Time Stamping in Fully-Monolithic Highly-Granular Pixel Detectors

Mr Matteo Milanesio (Universite de Geneve (CH))

Timing with pixels

ORAL

The MONOLITH H2020 ERC Advanced project aims at producing a monolithic silicon pixel ASIC with 50 µm pixel pitch and picosecond-level time stamping. The two main ingredients of the project are fast and low-noise SiGe BiCMOS electronics and a novel sensor concept, the Picosecond Avalanche Detector (PicoAD). The PicoAD uses a patented multi-PN junction to engineer the electric field and produce...

56. Monolithic Multi-Element SDD "mxdCMOS" (Multi-element X-ray Detector CMOS) for High-Throughput Synchrotron Radiation Spectroscopy

Dr Togo Kudo (Japan Synchrotron Radiation Research Institute)

Photon science applications

ORAL

Next-generation synchrotron radiation facilities demand X-ray detectors capable of handling tens of Mcps while maintaining excellent energy resolution. To address this demand, we have developed "mxdCMOS" (Multi-element X-ray Detector CMOS), a novel monolithic multi-element silicon drift detector (SDD) fabricated on high-resistivity silicon using a silicon-on-insulator (SOI)...

35. MuPix ladders for the Mu3e Outer Pixel Detector

Ashley Ellen McDougall (The University of Oxford)

Monolithic sensors

ORAL

The Mu3e experiment at PSI searches for the charged lepton flavour violating decay $\mu^+ \rightarrow e^+e^-e^+$, demanding ultra-low-mass detector technology to minimise multiple scattering and achieve momentum resolution below 1 MeV/c. The outer pixel detector layers (L3/L4) are built from ladders comprising 17–18 MuPix11 HV-MAPS sensors (70 $\mu$m thin), a low-mass aluminium/polyimide HDI,...

94. Nineteen-Year Progress and Future Prospects of the Event-Driven X-ray SOI Pixel Sensor "XRPIX"

Takeshi Tsuru (Kyoto University)

Monolithic sensors

POSTER

We are developing X-ray SOIPIXs, "XRPIXs", monolithic Silicon-On-Insulator (SOI) CMOS active pixel sensors for future X-ray astronomy. To meet stringent astrophysical requirements, a thick, high-resistivity handle wafer serves as the fully depleted, back-illuminated sensor layer to ensure high quantum efficiency across a wide energy band. Each pixel features an event trigger output, enabling...

74. OBELIX: from sensor design to integration in the Belle II vertex detector upgrade

Mr Roberto Russo (Austrian Academy of Sciences (AT))

Monolithic sensors

ORAL

The Belle II experiment at the SuperKEKB e$^+$e$^-$ collider (Tsukuba, Japan) currently holds the world luminosity record of 5.2 $\times$ 10$^{34}$ cm$^{-2}$ s$^{-1}$, with plans to reach 6 $\times$ 10$^{35}$ cm$^{-2}$ s$^{-1}$. To meet the demands of this unprecedented luminosity, the existing PXD and SVD detectors will be replaced by a new vertex detector (VTX), constisting of five layers...

55. OCTOPUS - A MAPS demonstrator for future lepton collider vertex detectors

Lennart Huth (Deutsches Elektronen-Synchrotron (DE))

Monolithic sensors

ORAL

Vertex detectors at future lepton colliders do pose strict requirements on performance: single point resolution of 3 μm, time resolution in the order of 5 ns, rate capabilities in the order of 100 MHz/cm2 are needed at an ultra low material budget imposing a maximal sensor thickness of 50 μm and below 50 mW/cm2 power dissipation. While each requirement is fulfilled by sensors previously...

127. Operating the ALICE ITS2: Experience and Performance throughout LHC Run 3

Jiyoung Kim (Inha University (KR))

High energy and nuclear physics experiments

ORAL

The Inner Tracking System (ITS2) is the innermost tracking detector of the ALICE experiment, upgraded for LHC Run 3, providing vertex reconstruction and tracking of charged particles. The detector consists of seven cylindrical layers of Monolithic Active Pixel Sensors covering 10 m$^{2}$ of active area. The ALPIDE sensors are manufactured using a 180 nm CMOS technology and feature 29 $\times$...

102. Optimization of a Double-Photon Emission Coincidence Imaging System Using Direction-Sensitive Detectors

NORIA SUZUKI

Applications in biology, medical imaging

POSTER

Nuclear medicine modalities such as single-photon emission computed tomography (SPECT) enable non-invasive assessment of physiological function and disease. Conventional SPECT estimates the location of a radioactive source by physically restricting the incident directions of gamma rays using heavy-metal collimators. In contrast, we have proposed double-photon emission coincidence imaging...

47. OROCHI: a Sub-mm SOI Pixel Detector

Yusuke Suda (Hiroshima University)

Monolithic sensors

POSTER

The demand for low-power consumption pixel sensors has been increasing in high energy physics and space-based experiments. In such applications, low material budget and high radiation tolerance are required. The simplest and most promising solution is to develop a monolithic pixel sensor with a large pixel size. To withstand harsh radiation environments, it is desirable that the sensor is...

37. Performance characterization of a monolithic active pixel sensor with an internal gain layer using IR-laser

Yuta Okazaki (KEK High Energy Accelerator Research Organization (JP))

Monolithic sensors

POSTER

CASSIA is a prototype monolithic active pixel sensor (MAPS) featuring an
amplification layer, fabricated using a 180 nm CMOS process. The
amplification layer improves the signal-to-noise ratio (S/N) and reduces
the power consumption of the analog front-end by amplifying the charge
signal generated by traversing particles.

CASSIA includes two types of structures: one without an...

114. Performance Evaluation of the Monolithic SOI Pixel Detector DuTiP Using Electron Beam and Infrared Laser Measurements

Miho Yamada (Tokyo Metropolitan College of Industrial Technology)

Monolithic sensors

ORAL

The Belle II experiment plans an upgrade of its vertex detector during Long Shutdown of SuperKEKB to cope with increased background levels at an instantaneous luminosity of up to $6\times10^{35}~\mathrm{cm^{-2}s^{-1}}$. To meet the requirements of high hit rates, low material budget, and precise timing information, we are developing DuTiP, a monolithic SOI pixel detector featuring in-pixel...

87. Performance Improvement of X-ray SOI Pixel Detector by Increasing Concentration of Buried Well in PDD Pixel Structure

Moeno Nakatani (Tokyo University of Science)

Monolithic sensors

POSTER

We have been developing the X-ray SOI pixel detector XRPIX for future X-ray astronomy satellites. XRPIX is a device based on Silicon-On-Insulator (SOI) technology, consisting of a Si sensor layer, a SiO₂ buried oxide (BOX) layer, and a CMOS circuit layer. The energy of incident X-rays is measured by converting the charge generated in the sensor layer into a voltage signal.

XRPIX employs a...

125. Performance of a monolithic stitched sensor with timing: the ALICE ITS3 MOST

Isis Hobus (Nikhef National institute for subatomic physics (NL))

Monolithic sensors

ORAL

In 2028, the ALICE experiment will install three new Inner Tracking System layers of wafer-scale stitched sensors that will be bent around the beam pipe. Two prototypes developed towards these detectors, the MOnolithic Stitched Sensor (MOSS) and MOnolithic Stitched Sensor with Timing (MOST), allow the study of yield dependence on circuit density, power supply segmentation, stitching...

38. Performance of CMOS pixel detector IU233N5-Z damaged with 200 MeV proton beam

Dr Taishu Kayanoki (University of Miyazaki)

Astrophysics applications

POSTER

CMOS pixel detectors with fine pixel sizes of 1–10 µm are expected to be used in future X-ray astrophysical observations because of their high spatial and time resolution, low power consumption, and low detector mass. Radiation damage from ~100 MeV protons in the South Atlantic Anomaly (SAA) is expected to be a major issue for detectors on board low-Earth-orbit satellites because these protons...

44. Performance of FBK Trench-Isolated LGAD coupled to Timpix3 Chip

Chin-Chia Kuo (Hamburg University (DE))

Timing with pixels

POSTER

The standard reference telescope operated at the DESY II test beam facility employs six planes of MIMOSA 26 monolithic active pixel sensors for spatial track reconstruction. However, the rolling-shutter architecture of these sensors dictates an integration time of approximately 115 μs. Consequently, integrating a time-tagging layer is critical to associate the reconstructed tracks with...

5. Performance of the CMS Silicon Tracker in Run 3

Henriette Aarup Petersen (Universite Catholique de Louvain (UCL) (BE))

High energy and nuclear physics experiments

POSTER

The Silicon Tracker is the innermost sub-detector of the Compact Muon Solenoid (CMS) experiment and is used to measure charged particles produced in high-energy collisions at the Large Hadron Collider (LHC). It is the world’s largest silicon tracking system, composed of an inner pixel detector with 1,856 modules and an outer strip detector consisting of 15,148 modules.

During Run 3...

100. Persistence characterization of an infrared H2RG detector for NINJA

Kensho TANAKA

Astrophysics applications

ORAL

Near-INfrared and optical Joint spectrograph with Adaptive optics (NINJA) is a near infrared spectrograph for the Subaru Telescope covering the wavelength range of 0.8–2.5 µm. NINJA employs a 2.5-µm cutoff HAWAII-2RG (H2RG) infrared detector. H2RG is a hybrid infrared detector composed of a HgCdTe photodiode layer and a silicon readout integrated circuit. It has a format of 2048 $\times$ 2048...

48. Position dependents timing performance investigation on 3D sensor

chuan liao (The High Energy Accelerator Research Organization)

Timing with pixels

POSTER

In this work, we investigate the timing performance and uniformity of double-sided p-type 3D silicon sensors produced by the Centro Nacional de Microelectrónica (CNM) on high-resistivity Czochralski silicon substrates. The studied devices consist of 5 × 5 pixel matrices with hexagonal and square electrode geometries and inter-electrode spacings of 30 μm and 50 μm.
The sensors were first...

95. Precision 4D measurements of interaction vertices with the Timepix4 Telescope

David Bacher (University of Oxford (GB))

Timing with pixels

ORAL

We present the first demonstration of four-dimensional (4D) vertexing - with precision better than $20\,\mathrm{\mu m}$ in space and $60\,\mathrm{ps}$ in time - using a fully integrated detector system, in which the spatial position and the time of particle interaction vertices are measured simultaneously using the same detector planes. Whereas previous 4D efforts have relied on dedicated...

14. Probing Photon Indistinguishability with Fast Pixel Detectors

Andrei Nomerotski (Czech Technical University in Prague)

Timing with pixels

POSTER

Quantum technologies critically rely on the ability to detect and identify indistinguishable photons, as only such photons exhibit high-contrast quantum interference. We present a new approach to real-time photon indistinguishability detection based on ultrafast spectro-temporal imaging using pixelated spectrometers. The concept maps each detected photon onto a well-defined time–frequency...

12. Production Status and Performance of CMS Phase-2 Inner Tracker Modules

Sophie Rohletter (ETH Zurich (CH))

High energy and nuclear physics experiments

POSTER

The Phase-2 Upgrade of the CMS Inner Tracker has entered the module production phase in preparation for operation at the High-Luminosity LHC. Following the successful validation of the final pixel module design based on the CROCv2 readout chip, the project has transitioned from prototyping to large-scale production. Module production has recently started across a network of distributed sites,...

77. R&D for LHCb VELO Upgrade 2

Kazu Akiba (Nikhef National institute for subatomic physics (NL))

High energy and nuclear physics experiments

ORAL

The LHCb experiment plans an Upgrade II for the High-Luminosity LHC, foreseen for 2034, operating at an instantaneous luminosity of $1.5\times10^{34}\,\mathrm{cm^{-2}\,s^{-1}}$ and integrating more than $300\,\mathrm{fb^{-1}}$. Under these conditions about 42 interactions occur per bunch crossing, producing roughly 2000 charged particles within the detector acceptance. A new Vertex Locator...

65. R&D Progress of the CharTPix MAPS for the STCF Inner Tracker

Xinyu Bin (University of Science and Technology of China (CN))

Monolithic sensors

POSTER

The proposed Super Tau-Charm Facility (STCF) is a next-generation high-luminosity e+e- collider with a designed peak luminosity exceeding 0.5×10³⁵ cm⁻²s⁻¹. Operating under such high-rate and high-background conditions, the STCF inner tracker demands an ultra-low material budget of ~0.3% X₀ per layer. To meet these requirements, the CharTPix series of Monolithic Active Pixel Sensors (MAPS) is...

16. Recent developments in Hybrid Silicon Sensor in the DRD3 Collaboration

Alessandro Tricoli (Brookhaven National Laboratory (US))

Timing with pixels

ORAL

The DRD3 Collaboration at CERN has been driving significant progress in the development of advanced semiconductor devices, including hybrid silicon sensor technologies tailored for precision timing and tracking applications in future particle physics experiments. Recent activities have centered on a diverse portfolio of innovative sensor technologies, including Low Gain Avalanche Detectors...

124. Results from an HV-MAPS-Based Pixel Tracker for Vertex-Reconstructed Muon Spin Rotation

Mr Lukas Mandok (Heidelberg University (DE))

Monolithic sensors

ORAL

Muon Spin Rotation (μSR) spectroscopy is a well-established technique for investigating the magnetic properties of materials through the spin evolution of implanted polarized muons. At continuous muon beams, conventional scintillator-based spectrometers are limited by detector pile-up, restricting operation to rates of approximately 40 kHz. Vertex-reconstructed μSR (vx-μSR) overcomes this...

61. Scaling up test-beam measurements of detector material via multiple scattering with the MONSTAR telescope

Baris Tuncay (University of Oxford (GB))

High energy and nuclear physics experiments

ORAL

Precise knowledge of detector material for particle detectors is crucial both during the R&D phase and during operation as an input to simulations, in particular for tracking detectors in which both momentum and position resolution are highly sensitive to traversed material. Most past and current projects rely on coarse-grained estimates derived from design files, the accuracy of which can be...

22. Sensor response and radiation damage effects in the ATLAS Pixel Detector

ATLAS Collaboration

Radiation tolerance

POSTER

After many years of operation at the LHC, the pixel sensors of the ATLAS Pixel detector have accumulated a large average bulk damage fluence. In the innermost barrel layer, this fluence is in excess of 2 × 10**15 1 MeV-neutrons equivalent/cm2. The macroscopic effects of this radiation are an increase of the sensor leakage current, a loss of charge collection efficiency and an increase of the...

107. SEU Study at nominal data rate of the ITkPix front-end with 228 MeV proton beams

Riccardo Zanzottera (Università degli Studi e INFN Milano (IT))

Radiation tolerance

ORAL

The ATLAS ITk pixel detector for HL-LHC is equipped with front-end chips (FE) designed by the RD53 Collaboration. The study of Single Event Upsets (SEU) for the production FE is crucial to verify its robustness and reliable operation at the HL-LHC, where the hit rate, dominated by charged hadrons, reaches up to 240 hits/FE/trigger. Prototype FEs showed a failure mode in which SEU can...

67. SPARC: An Asynchronous Pixel Readout Architecture for Low-Power Monolithic Sensors

Camille Fournier (Centre National de la Recherche Scientifique (FR))

Monolithic sensors

POSTER

Monolithic active pixel sensors (MAPS) have emerged as the baseline technology for a wide range of particle physics experiments, driven by their proven integration capabilities and favorable power-to-performance trade-offs. As experimental requirements evolve, pixel matrix designs must simultaneously satisfy increasingly stringent constraints in power consumption, layout area, time-stamping...

60. Study of carrier scattering and TCAD defect modeling for silicon sensors irradiated to extreme fluences

Christian Scharf (Humboldt University of Berlin (DE))

Radiation tolerance

POSTER

We present a study of radiation-effect modeling in silicon pad diodes irradiated to extreme neutron fluences of up to $1 \times 10^{18}\,n_\mathrm{eq}/\mathrm{cm}^2$, corresponding to the fluences expected at the innermost radii of tracking detectors at a future circular hadron collider. At such fluences, the low-doped silicon bulk and the highly doped implant no longer behave like a typical...

105. Study of Single Event Burnout in LGAD Sensors Using 70 MeV Proton Irradiation

Masato Terada (The University of Osaka (JP))

Radiation tolerance

POSTER

Future high-luminosity hadron collider experiments require detectors with excellent radiation tolerance because they will be exposed to extremely high radiation levels throughout their operational lifetime. High-luminosity LHC(HL-LHC) which will start in 2030 is one of such environments. ATLAS experiment will install new inner Tracker (ITk) for the HL-LHC. The innermost layer of ITk would be...

41. Test beam results of ATLAS ITk Pixel production sensors and modules

Md Arif Abdulla Samy (University of Glasgow (GB))

Radiation tolerance

ORAL

The ATLAS experiment inner detector will undergo a complete replacement with the all-silicon Inner Tracker (ITk) during the 2027–2029 shutdown, in preparation for operation at the High-Luminosity Large Hadron Collider. The ITk pixel detector, forming the innermost tracking system, is designed to operate under unprecedented radiation levels and particle densities. Its innermost layer (Layer 0)...

80. The ALICE 3 Outer Tracker: Design challenges and current R&D status

Bogdan Blidaru (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))

High energy and nuclear physics experiments

POSTER

The ALICE Collaboration is pursuing ALICE 3 as the next-generation heavy-ion detector for LHC Run 5. Its design targets excellent vertexing performance, precision tracking over a wide transverse-momentum range, and particle identification over an extended pseudorapidity coverage using advanced silicon-based detectors.

The tracking system is composed of a low material budget Inner Tracker...

30. The ATLAS High-Granularity Timing Detector for the HL-LHC: project status and results

Louis D'Eramo (LPCA - CNRS/IN2P3 (FR))

High energy and nuclear physics experiments

ORAL

The HGTD is a novel detector introduced by ATLAS to augment the new all-silicon Inner Tracker (ITk) in the pseudorapidity range from 2.4 to 4.0, adding the capability to measure charged-particle trajectories in time as well as space. Two double-sided layers of silicon sensors will provide precision timing information for charged particles with a resolution as good as 30 ps per track to help...

32. The ATLAS ITk Strip Detector: design and expected performance

to be decided

High energy and nuclear physics experiments

POSTER

The ATLAS Inner Tracker (ITk) Strip detector, being constructed for the High-Luminosity Large Hadron Collider (HL-LHC), is presented. The all-silicon ITk will replace the current ATLAS Inner Detector to cope with the significantly increased particle densities and radiation levels expected at the HL-LHC, where up to 200 proton-proton interactions will occur in a single bunch crossing. Compared...

71. The ATLAS Pixel Luminosity Ring for High-Luminosity LHC

Sohaib Hassan (University of Oslo (NO))

High energy and nuclear physics experiments

POSTER

The ATLAS physics programme at the High-Luminosity LHC (HL-LHC) requires luminosity measurements with a precision of approximately 1% to support precision measurements and searches for new phenomena.

The Pixel Luminosity Ring (PLR) is a dedicated luminosity detector designed to determine luminosity by counting large pixel clusters consistent with particles originating from proton–proton...

7. The CMS Phase-2 Inner Tracker: Detector Overview & Project Status

Clemens Lange (Paul Scherrer Institute (CH))

High energy and nuclear physics experiments

ORAL

The CMS Phase-2 Inner Tracker is a key component of the experiment’s upgrade for operation at the High-Luminosity LHC, where extreme radiation levels, high occupancies, and increased data rates impose stringent requirements on detector design and performance. This contribution presents an overview of the Inner Tracker, including its layout, detector concept, and the main technological choices....

25. The CMS Phase-2 Inner Tracker: System Tests, Integration & Performance

Natale Demaria (INFN Torino (IT))

Integration in detection modules and structures

ORAL

As the CMS Phase-2 Inner Tracker enters the construction phase, system-level tests with final detector components are crucial to validate integration choices and demonstrate performance under realistic operating conditions. This contribution presents results from large-scale system tests using final modules mounted on representative support structures and operated with CO₂ cooling at low...

3. The CMS Phase-2 Outer Tracker: Design and First Year of Module Production Experience

Fabio Ravera (Fermi National Accelerator Lab. (US))

High energy and nuclear physics experiments

ORAL

The High-Luminosity Large Hadron Collider (HL-LHC) is expected to deliver an integrated luminosity of $3000$-$4000,$fb$^{-1}$, with peak instantaneous luminosities of $5$-$7.5\times10^{34},$cm$^{-2}$s$^{-1}$. To operate in this challenging environment, the Outer Tracker of the Compact Muon Solenoid (CMS) experiment will be entirely replaced. The Phase-2 Outer Tracker (OT) is designed to...

53. The ITk Pixel Detector for the ATLAS HL-LHC upgrade.

Dr To be decided

High energy and nuclear physics experiments

ORAL

The Large Hadron Collider is undergoing a high-luminosity upgrade that will increase the instantaneous collision rates by a factor of 5.
The ATLAS experiment detector system requires a major improvement, replacing the current Inner Detector by an all-silicon Inner Tracker (ITk). The ITk innermost layers are made of a 13 m^2 hybrid pixel detector designed to withstand higher radiation levels,...

6. The NA62 Gigatracker and 4D track reconstruction

Xiafei Chang (EPFL - Ecole Polytechnique Federale Lausanne (CH))

1

High energy and nuclear physics experiments

ORAL

The GigaTracKer is a hybrid silicon pixel detector of the fixed-target experiment NA62 at the CERN SPS that aims to precisely measure the branching ratio of the very rare $K^+ \rightarrow \pi^+ \nu \bar{\nu}$ decay. The detector was designed to provide measurements of the momentum, direction, and time of beam particles arriving at a rate of 750 MHz. The tracking system consists of four...

72. The path to compensated LGADs: characterisation of the 55 μm FBK nLGADs

Ludovico Massaccesi (Universita e INFN Torino (IT))

Radiation tolerance

POSTER

Particle physics experiments at future hadron colliders will need timing-based charged-particle detectors to cope with pileup. A natural choice of sensor for such applications is the Low-Gain Avalanche Diode (LGAD). The innermost layers, however, will be subjected to radiation fluences in the order of $10^{17}\;n_\text{eq}/\text{cm}^2$. State-of-the-art LGADs remain operable only until...

103. The Reality of Silicon at Scale: Testing Thousands of ITkPixV2 Pixel Detector Modules for the HL-LHC

Deion Elgin Fellers (Lawrence Berkeley National Lab. (US))

Integration in detection modules and structures

ORAL

Now in the advanced stages of module production for the HL-LHC ATLAS Inner Tracker (ITk) pixel detector upgrade, we have produced and tested thousands of modules and gained new insight into the ITkPixV2 front-end readout ASIC. An ITk pixel module is built from three or four ITkPixV2 chips, designed by the RD53 collaboration using 65 nm CMOS technology, which are bump-bonded to either a planar...

36. The SUIM Project for Measuring the Upper Atmosphere from the ISS with an X-ray SOI Pixel Detector

Kumiko Nobukawa

Astrophysics applications

POSTER

The upper atmosphere at altitudes of 60–110 km, corresponding to the mesosphere and lower thermosphere (MLT), is one of the least-observed regions of Earth’s atmosphere because in-situ measurements are technically challenging. Previous studies based on observations by X-ray astronomy satellites have demonstrated that the atmospheric transmission of cosmic X-ray sources is an effective method...

58. Toward a Visible-Light-Blind SiC Pixel Detector for Space UV and Soft X-ray Observations

Haruno Takamoto (University of Miyazaki)

Astrophysics applications

POSTER

Neutrino-triggered target-of-opportunity (ToO) observations can alert UV/soft X-ray observatories to catch the shock breakout from an imminent supernova, providing direct constraints on progenitor properties and circumstellar material before the explosion. Since UV/soft X-ray signals must be detected against intense visible-light backgrounds, conventional Si detectors on X-ray astronomy...

88. Toward XRF-like material sensitivity in laboratory X-ray micro-CT with CITIUS hyperspectral detector

Vittorio Di Trapani (University of Trieste, Department of Physics)

Applications in biology, medical imaging

ORAL

Spectral X-ray micro-CT (µCT) is an advanced technique that extends conventional µCT beyond absorption contrast by providing energy-resolved, material-sensitive information. Photon-counting detectors (PCDs) have already strongly advanced this field; however, they are limited by a few energy bins with resolutions >2 keV (FWHM) [1]. Hyperspectral X-ray detectors address these limitations by...

8. Towards a Superconducting Luminometer for FCC-ee: Device Physics, Detector Response, and Beam Performance

Dr Vagelis Gkougkousis (University of Zurich)

Sensing materials development

POSTER

Superconducting nano-wire single-photon detectors (SNSPDs) combine single-photon sensitivity with intrinsic timing capabilities approaching the picosecond scale, making them compelling candidates for a new generation of detectors for high-energy particle physics. Extending the exceptional single-photon performance of SNSPDs to relativistic charged particles could enable precision timing and...

43. Towards picosecond timing with Ti-LGAD Pixels: First results from the LIGHT01 Detector

Abderrahmane Ghimouz (Paul Scherrer Institute (CH))

Timing with pixels

ORAL

LIGHT01 is a prototype pixel readout ASIC developed to study high-precision timing with LGAD-based sensors for future 4D tracking and timing detectors. Fabricated in 28 nm CMOS technology, it integrates a 64-channel pixel matrix, with each channel including a low-noise front-end, a fast discriminator, and a dedicated time-to-digital conversion architecture. The goal is to investigate timing...

39. Trench-Isolated LGADs for time-resolved STXM

Shuqi Li

Photon science applications

ORAL

Time-resolved scanning transmission X-ray microscopy (tr-STXM) is a pivotal technique for investigating dynamic processes in condensed matter research. Currently, avalanche photodiodes (APDs) serve as the standard zero-dimensional detectors for tr-STXM imaging experiments down to approximately 600 eV. However, the impending upgrade of synchrotron facilities to diffraction-limited storage rings...

29. Trigger Timing Performance of the X-ray SOI Pixel Detector with Event-Driven Readout

Riki Sato (The University of Tokyo)

Astrophysics applications

POSTER

We are developing XRPIX, a pixel detector based on silicon-on-insulator technology, for future X-ray astronomy satellites. In hard X-ray observations, reducing non-X-ray background induced by cosmic rays is essential, and anti-coincidence with surrounding scintillators is an effective approach. This technique requires a timing resolution of about 10 µs. XRPIX has a trigger circuit in each...

99. Validation of TCAD Simulations Through Irradiation Tests on ALICE ITS3 MOSAIX Pixel Sensors

Giulio Borghello (CERN)

Monolithic sensors

POSTER

The new Inner Tracking System 3 (ITS3) vertex detector of the ALICE experiment at CERN is a prominent application of Monolithic Active Pixel Sensors (MAPS) in High Energy Physics (HEP). MOSAIX, the $\mathrm{26.6\,cm\!\times\!1.96\,cm}$ chip used in the detector, includes $\mathrm{22.8\,\mu m\!\times\!20.8\,\mu m}$ pixels designed to operate up to fluences of...

68. Van der Pauw characterisation of radiation-induced doping removal in LGAD gain implants

Alessandro Fondacci (University of Perugia, INFN Perugia and CERN)

Radiation tolerance

ORAL

Radiation-induced doping removal in the gain implant is one of the main limitations to the long-term operation of Low-Gain Avalanche Diodes (LGADs) in harsh radiation environments. The degradation of the gain implant reduces charge multiplication and directly affects the excellent timing capabilities of LGAD sensors, which can reach resolutions of a few tens of picoseconds. For this reason,...

90. Vertex and energy reconstruction in JUNO-TAO

Jing Chen (Sun Yat-sen University)

High energy and nuclear physics experiments

POSTER

The Taishan Antineutrino Observatory (TAO, also known as JUNO-TAO) is a satellite experiment of the Jiangmen Underground Neutrino Observatory (JUNO), located about 44 m from a reactor core at the Taishan Nuclear Power Plant. TAO is the first large-scale silicon photomultiplier (SiPM)-based liquid scintillator detector. Its ton-scale liquid scintillator target is viewed by a high-granularity...

126. W-Si High Precision Preshower Detector of FASER Experiment at LHC

Yosuke Takubo (National Institute of Technology (KOSEN), Niihama College (JP))

High energy and nuclear physics experiments

POSTER

The FASER experiment at the LHC is designed to search for light, extremely weakly interacting particles and study high-energy neutrinos. The FASER Pixel Preshower system, presented here, has been operational since the start of the 2025 data taking of the LHC and is composed of four layers of monolithic silicon detectors with hexagonal 100$\,\mu m$-pitch pixels, interleaved with tungsten...