
Tommy Tsang developed and enhanced detector simulation and reconstruction features across the eic/EICrecon and eic/epic repositories, focusing on Time-of-Flight (TOF) systems and silicon-based sensors. He implemented realistic digitization algorithms, advanced charge sharing models, and clustering techniques using C++ and CMake, integrating calibration and geometry updates to improve data fidelity. Tommy refactored core components for maintainability, aligned code with CAD specifications, and resolved geometry and segmentation bugs to ensure accurate detector modeling. His work addressed both algorithmic depth and practical integration, supporting high energy physics analyses by delivering robust, traceable improvements in signal processing, simulation accuracy, and reconstruction workflows.

October 2025 — eic/epic: Delivered a critical BTOF envelope-fit bug fix with a 2.5 cm forward shift; no breaking changes to default behavior. This change prevents assembly interference, preserves existing design intents, and reduces downstream rework in manufacturing. Commit: 83aeabee6492621789014fd3bfb959fdadf19263 (#965).
October 2025 — eic/epic: Delivered a critical BTOF envelope-fit bug fix with a 2.5 cm forward shift; no breaking changes to default behavior. This change prevents assembly interference, preserves existing design intents, and reduces downstream rework in manufacturing. Commit: 83aeabee6492621789014fd3bfb959fdadf19263 (#965).
September 2025 monthly work summary focusing on key accomplishments, major fixes, and business value across eic/epic and eic/EICrecon. Delivered detector material and geometry enhancements to extend FTOF capabilities and introduced LGAD-based hit reconstruction in TOFBarrel, establishing groundwork for improved tracking and downstream analyses. The work improves detector signal processing readiness for dRICH material studies, supports cross-repo integration, and accelerates data quality improvements through refactoring and calibration/clustering algorithms.
September 2025 monthly work summary focusing on key accomplishments, major fixes, and business value across eic/epic and eic/EICrecon. Delivered detector material and geometry enhancements to extend FTOF capabilities and introduced LGAD-based hit reconstruction in TOFBarrel, establishing groundwork for improved tracking and downstream analyses. The work improves detector signal processing readiness for dRICH material studies, supports cross-repo integration, and accelerates data quality improvements through refactoring and calibration/clustering algorithms.
August 2025 (2025-08) monthly summary for eic/EICrecon. Key feature delivered: CFDROCDigitization algorithm integration for BTOF sensor signal processing, replacing the old constant-threshold method. Added new C++ sources and configuration to support CFDROCDigitization. Updated the BTOF detector factory to utilize the new algorithm, achieving improved timing performance and data quality.
August 2025 (2025-08) monthly summary for eic/EICrecon. Key feature delivered: CFDROCDigitization algorithm integration for BTOF sensor signal processing, replacing the old constant-threshold method. Added new C++ sources and configuration to support CFDROCDigitization. Updated the BTOF detector factory to utilize the new algorithm, achieving improved timing performance and data quality.
July 2025 Monthly Summary focusing on key accomplishments across eic/epic and eic/EICrecon. The month delivered targeted fixes and modeling enhancements that directly improve tracking quality, hit integrity, and computational efficiency for physics analyses.
July 2025 Monthly Summary focusing on key accomplishments across eic/epic and eic/EICrecon. The month delivered targeted fixes and modeling enhancements that directly improve tracking quality, hit integrity, and computational efficiency for physics analyses.
Month: 2025-06. Focused on delivering targeted improvements to the eic/epic codebase, driving readability, accuracy, and maintainability for ongoing physics work. Key updates include a naming overhaul for TOF components (Barrel and Endcap) to reflect position and original identifiers, and an ETOF simulation grid size adjustment to achieve a realistic position resolution of ~0.03 mm during ongoing charge sharing and clustering developments. These changes improve component identification, help produce more reliable simulation results, and streamline debugging and future enhancements. The work is tracked via explicit commits and issue references, enabling traceability and rapid review.
Month: 2025-06. Focused on delivering targeted improvements to the eic/epic codebase, driving readability, accuracy, and maintainability for ongoing physics work. Key updates include a naming overhaul for TOF components (Barrel and Endcap) to reflect position and original identifiers, and an ETOF simulation grid size adjustment to achieve a realistic position resolution of ~0.03 mm during ongoing charge sharing and clustering developments. These changes improve component identification, help produce more reliable simulation results, and streamline debugging and future enhancements. The work is tracked via explicit commits and issue references, enabling traceability and rapid review.
May 2025 performance summary for eic/epic: Delivered critical detector geometry improvements and bug fixes that directly enhance data quality and physics reach. The work focused on the Barrel TOF upgrade and ETOF readout alignment, with tight integration to CAD/design proposals.
May 2025 performance summary for eic/epic: Delivered critical detector geometry improvements and bug fixes that directly enhance data quality and physics reach. The work focused on the Barrel TOF upgrade and ETOF readout alignment, with tight integration to CAD/design proposals.
Concise monthly summary for 2025-04 focusing on EICrecon work. Highlights delivered: Silicon Pulse Discretization API and TOFBarrel integration; codebase refactor renaming LGADPulseGeneration -> SiliconPulseGeneration and LGADPulseDigitization -> EICROCDigitization; PulseCombiner enhancements for overlapping pulses; bug fix to SiliconPulseDiscretization to prevent NaN values.
Concise monthly summary for 2025-04 focusing on EICrecon work. Highlights delivered: Silicon Pulse Discretization API and TOFBarrel integration; codebase refactor renaming LGADPulseGeneration -> SiliconPulseGeneration and LGADPulseDigitization -> EICROCDigitization; PulseCombiner enhancements for overlapping pulses; bug fix to SiliconPulseDiscretization to prevent NaN values.
Monthly work summary for 2025-03 focusing on features delivered, bugs fixed, and impact across eic/epic and eic/EICrecon. Delivered fixes to Barrel TOF half-sensor segmentation and LGAD charge sharing compatibility, improving geometry accuracy and detector performance. This month emphasized cross-repo collaboration and robust segmentation handling to support updated detector models.
Monthly work summary for 2025-03 focusing on features delivered, bugs fixed, and impact across eic/epic and eic/EICrecon. Delivered fixes to Barrel TOF half-sensor segmentation and LGAD charge sharing compatibility, improving geometry accuracy and detector performance. This month emphasized cross-repo collaboration and robust segmentation handling to support updated detector models.
February 2025 focused on delivering end-to-end TOF Barrel digitization within the EICrecon reconstruction pipeline. Implemented a realistic BTOF digitization and RecHit generation algorithm that simulates charge sharing between adjacent strips, converts deposited charge into electrical pulses, digitizes pulses into TDC/ADC values, and back-converts digital values into time and energy deposition to produce a TOFBarrelRecHit. This work enhances detector realism, supports calibration studies, and improves end-to-end reconstruction fidelity for the Barrel TOF system. The feature is integrated in eic/EICrecon under commit b15f41f9140a040d8a8bf2db3a9d5afc612c8654 with message 'Realistic BTOF digitization (#1635)'.
February 2025 focused on delivering end-to-end TOF Barrel digitization within the EICrecon reconstruction pipeline. Implemented a realistic BTOF digitization and RecHit generation algorithm that simulates charge sharing between adjacent strips, converts deposited charge into electrical pulses, digitizes pulses into TDC/ADC values, and back-converts digital values into time and energy deposition to produce a TOFBarrelRecHit. This work enhances detector realism, supports calibration studies, and improves end-to-end reconstruction fidelity for the Barrel TOF system. The feature is integrated in eic/EICrecon under commit b15f41f9140a040d8a8bf2db3a9d5afc612c8654 with message 'Realistic BTOF digitization (#1635)'.
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