This contribution will summarize the new features released in 2022/2023 in the v2.x release series of Allpix Squared.
The 100µPET project, led by the University of Geneva, the University of Luzern, and the École Polytechnique Fédérale de Lausanne, aims at the development of a small-animal positron emission tomography (PET) scanner with ultra-high-resolution molecular imaging capabilities.
This is achieved with compact and modular stacks of multiple thin monolithic pixel detectors bonded to flexible...
The design of a new high-granularity pre-shower detector for the FASER experiment at LHC is in progress, with the purpose of measuring and discriminating electromagnetic showers generated by photons with O(TeV) energies and separation down to 200 µm. The new pre-shower will comprise six planes of monolithic silicon pixel detectors with hexagonal pixels of 65 µm side.
The detector simulation...
Radiation therapy is commonly used for cancer treatment. However, not only tumor tissue is affected by ionizing radiation, but also healthy tissue is damaged [1]. The ratio of tumor control with respect to healthy tissue damage needs to be optimised by choosing suitable particle types, energies, and dose rates. Healthy tissue is less affected if dose is applied with very high dose rates, i.e....
LUXE (Laser Und Xfel Experiment) is a new experiment proposed at DESY to investigate the strong-field regime of QED, with the main aims (a) to measure the interactions of real photons with $e^-$/$e^+$ at field strengths where the coupling to charges becomes non-perturbative; (b) to make precision measurements of the $e^-\gamma$ and $\gamma\gamma$ interactions in a transition from perturbative...
The Transient Current Technique (TCT) is a powerful yet flexible laboratory characterization technique for silicon sensors. By precisely injecting charges with laser pulses and analyzing waveforms, produced as deposited charge drifts in the sensor bulk, one may experimentally study different charge collection features of the sensor under test.
With the development of novel types of silicon...
The Allpix-Squared simulation toolkit has long been used by the ATLAS Collaboration to perform simulations of silicon pixel and strip detectors, developed for future deployment in the upgraded central detector called the ATLAS Inner Tracker (ITk). Lately, the focus has shifted towards a particular class of strip detectors featuring radial geometry of strips, so-called ITk Strip End-Cap...
The ATLAS Inner Detector (ID) will be replaced with a new all-silicon tracker (ITk) for LHCs high luminosity phase. ITk will consist of a pixel and a strip subdetector, both of which subdivide into barrel and endcap sections. The endcap strip modules use a radial strip geometry that resembles a polar coordinate system. Groups of these modules are then placed on a common support structure...
Authors: S. Lin$^1$ , Z.Wang$^1$, W. Li$^1$, S. M. Clayton$^1$, J. K. Baldwin$^1$, S. A. Currie$^1$, M. A. Hoffbauer$^1$, T. M. Ito$^1$, M. Makela$^1$, C. L. Morris$^1$, C. O`Shaughnessy$^1$, M. Singh$^1$, Z. Tang$^1$, W. Uhrich$^1$, P. L. Walstrom$^1$, B. Wolfe$^1$, H. Zhu$^2$, N. B. Callahan$^3$, M. Blatnik$^4$, B. Filippone$^4$, E. M. Fries$^4$, K. P. Hickerson$^4$, S. Slutsky$^4$, V....
In preparation for the High Luminosity LHC phase, the ATLAS collaboration is developing a new all-silicon tracking detector called the Inner Tracker (ITk). At the core of the new tracker will be 5 barrel layers equipped with hybrid pixel detectors with a fine pitch of either 50x50 or 25x100 μm. The new detector will need to withstand radiation damage levels up to 10 times greater than the...
Optimisation of the sensitive region of CMOS sensors with nonlinear electric fields requires precise simulations, which can be achieved by a combination of finite-element electrostatic field simulations and Monte Carlo methods. Exact predictions of the behaviour of monolithic active pixel sensors produced using commercial CMOS imaging processes are difficult to make, as the detailed electric...
The principle of signal formation in every ionization detector can be understood using the Shockley-Ramo Theorem. This simple but useful theorem states that the induced current in an electrode is proportional to the movements of the charges along the direction of a field called the Weighting Field. As such, this special field, or its potential called Weighting Potential are required to...
Beam telescopes are used to investigate future particle detector prototypes, and to do this efficiently they must provide excellent position and time resolution at the device under test location. One of the goals of the Tangerine Project is to develop a beam telescope based on sensors created in a 65 nm CMOS imaging process. In order to study the tracking performance and optimize the best...
Hexagonal pixels can be beneficial compared to rectangular geometries. By using a hexagonal pixel grid, the amount of shared charge in pixel corners is reduced, allowing for efficient operation over a larger threshold range for small signals. The pixel corners also have a larger opening angle compared to rectangular pixels, significantly impacting the electric field in this regions. A...
The talk will present the latest implementation of the Timepix3 front-end simulator. The front-end electronics channel is modelled using an integrator stage and parallel low-pass filtered feedback loops with individually configurable time constants. The system noise is implemented using independent bandwidth limited noise channels for pre-amplifier, feedback and threshold noise. The Timepix3...
In this work, we present a framework, wrapped around Allpix$^2$, that can be used to optimize the performance of the HL-LHC CMS Inner Tracker. The framework uses minimum-bias events, generated at a pileup of 200, and simulates their transversal through silicon pixel sensors with Allpix$^2$. The behavior of the Inner Tracker front-end (RD53B-CMS, i.e. CROC), for processing pixel hits, has been...
The Inner Tracker of the ATLAS experiment requires the optimal performance
of its pixel sensors. To test their efficiency, a reliable track reconstruction and
analysis for testbeam data is necessary to ensure the precise detection of par-
ticles. The quality of data from testbeam campaigns are influenced by many
factors, including high beam densities, which can impair the track...
Silicon Carbide (SiC) is a wide-bandgap semiconductor that has recently become a topic of intensified interest in the HEP instrumentation community due to the availability of high-quality wafers from the power electronics industry. SiC features multiple advantageous material properties over silicon. It is insensitive to visible light, hypothesized to be more radiation hard, and has much lower...
Allpix-Squard is Geant4 based modular framework that was initially designed for the simulation of silicon detectors in high-energy physics but now its sensor material capability and applicability have been extended. My work is intended to check the validity of the implementation of Diamond material in Allpix-squared. Diamond sensors have specific applications in high-energy physic because of...
Allpix Squared has been using LaTeX to create its documentation. While this results in an excellent looking PDF, the documentation on the website had issues with displaying certain math and code blocks nicely. Thus it was decided to change the documentation format, using Markdown for the source and [Docsy][1] for the website.
This talk will present the now deployed website, some of the...
