TWEPP 2025 Topical Workshop on Electronics for Particle Physics

Session

Trigger

9 Oct 2025, 15:20

Rethymno, Crete, Greece

Conveners

Trigger

• Sophie Baron (CERN)
• Ioannis Kopsalis (University of Birmingham (GB))
• Ioannis Kopsalis (National Technical Univ. of Athens (GR))

Trigger

• Ioannis Kopsalis (University of Birmingham (GB))
• Ioannis Kopsalis (National Technical Univ. of Athens (GR))
• Salvatore Danzeca (CERN)

Trigger

• Johan Alme (University of Bergen (NO))
• Ioannis Kopsalis (National Technical Univ. of Athens (GR))
• Ioannis Kopsalis (University of Birmingham (GB))

26. From Discrete Components to ASICs: Achieving Sub-Picosecond Clock Synchronization for Large-Scale Detectors

Rohith Saradhy (University of Minnesota (US))

09/10/2025, 15:20

Timing and Trigger Distribution

Oral

We present an implementation of the digital dual mixer time difference (DDMTD) circuit in an ASIC using current mode logic (CML) and discuss how it can be used to stabilize on-detector systems to a level of less than 1 picosecond. This circuit is used extensively in high energy physics applications and other clock distribution systems to monitor clock stability using FPGAs. By using CML logic...

73. Precision Timestamping Methods for ECAL Upgrade II on Front-End FPGA

Lauren Mackey (Syracuse University (US))

09/10/2025, 15:40

Timing and Trigger Distribution

Oral

Precision timing is critical for the LHCb ECAL Upgrade II to operate effectively in the high pile-up conditions of the HL-LHC. Fast waveform sampling ASICs have been identified as suitable readout electronics for achieving the few tens of picoseconds resolution required to reconstruct electromagnetic showers. To extract precise timestamps in the presence of pile-up induced background, machine...

159. Assessing the performance of future White-Rabbit RF and Timing distribution system for LHC under real conditions

Lilith Kaffka (CERN)

09/10/2025, 16:00

Timing and Trigger Distribution

Oral

To meet the High-Luminosity LHC demand for enhanced phase stability and replace the outdated RF and timing distribution system (called TTC backbone), an upgrade to a White Rabbit-based system is planned. A compliance test showed a phase variation of less than 30 ps in a proof-of-concept system. In order to assess the quality of the new system in real conditions a test campaign was started in...

101. Development and demonstration of a CMS Phase-2 Level-1 trigger Data Scouting baseline system for HL-LHC

Mr Rocco Ardino (CERN)

10/10/2025, 09:00

Timing and Trigger Distribution

Oral

The CMS Phase-2 upgrade for the High-Luminosity LHC introduces the Level-1 Data Scouting (L1DS), a novel data acquisition system that captures and processes Level-1 (L1) trigger information at the full 40 MHz collision rate. The L1DS bypasses the L1 selection to enable searches for signatures previously limited by L1 constraints. This contribution presents the development of a Phase-2 L1DS...

61. Finalization of the Sector Logic ATCA blade design for the ATLAS Level-0 muon trigger at HL-LHC

Shota Izumiyama (Nagoya University (JP))

10/10/2025, 09:20

Timing and Trigger Distribution

Oral

The TDAQ of the ATLAS experiment will be upgraded in alignment with the High-Luminosity LHC project so that the trigger rate increases from 100 kHz to 1 MHz. As the hardware muon trigger of TGC (RPC) for the endcap (barrel), we developed a Sector Logic ATCA blade consisting of a large-scale FPGA, AMD Virtex UltraScale+, and 10 Gbps optical transceivers. In two prototyping phases, we evaluated...

50. Standalone Timing Distribution and Event Capture Firmware for Back-End Electronics Test Stands

Raghunandan Shukla (Imperial College (GB))

10/10/2025, 10:10

Timing and Trigger Distribution

Oral

Timing and control firmware was developed to operate a vertical slice of the CMS high-granularity calorimeter front-end and back-end systems at beam tests, in the absence of a full-fledged system. It provides various trigger sources (software, regular, random, external), throttling mechanisms and a programmable sequencer of fast commands. A data capture block for local readout of the outgoing...

140. The ATLAS Tile Calorimeter Trigger and Data Acquisition Interface: Development, Integration and Validation

Thomas Junkermann (Heidelberg University (DE))

10/10/2025, 10:30

Timing and Trigger Distribution

Oral

Future High Luminosity LHC runs introduce more simultaneous proton-proton collisions for the LHC experiments. The ATLAS Tile Calorimeter (TileCal) plans a replacement of the on- and off-detector electronics to meet the requirements for faster data processing. New off-detector electronics provide high-bandwidth data to the upgraded Trigger and Data Acquisition (TDAQ) system. The Tile...