key4hep/k4geo
Jul 2025 – Feb 2026
4 Months active
Languages Used
C++XML
Technical Skills
C++Geant4Physics SimulationXML configurationmaterial sciencesimulation development
Daniel Jeans
PROFILE
Daniel Jeans
Over four months, contributed to the key4hep/k4geo repository by developing and refining detector simulation features using C++ and XML. Delivered a new SEcal06_ECRing driver for endcap calorimeter geometry, aligning models and improving maintainability through explicit dimension handling and updated XML configurations. Enhanced simulation fidelity by implementing accurate magnetic field coordinate transformations and integrating CAD-based material definitions. Improved Geant4 step tracking for TPC hit depositions, introducing structures to retain step data and increasing hit accuracy. Addressed code quality with clang-format, logging, and documentation updates, while resolving a key bug in magnetic field mapping to reduce systematic errors in detector studies.
Overall Statistics
Feature vs Bugs
75%Features
Repository Contributions
4Total
Bugs
1
Commits
4
Features
3
Lines of code
1,093
Activity Months4
Your Network
25 peopleSame Organization
@kek.jp1
Shared Repositories
24
Work History
February 2026
1 Commits • 1 Features
Feb 1, 2026February 2026 — Key4hep/k4geo: Implemented SEcal06_ECRing Endcap Calorimeter driver and aligned geometry with ILD models. Established explicit hole offset handling, standardized use of derived dimensions, and removed cross-dependencies that caused overlaps in the ILC QD0 cryostat. Delivered updated XML configurations (SEcal06_siw_ECRing.xml, SEcal06_ECring.xml) and ensured the ILD models reference the new driver. These changes reduce integration risk, improve calorimeter geometry accuracy, and streamline future model maintenance.
1 Commits • 1 Features
Feb 1, 2026February 2026 — Key4hep/k4geo: Implemented SEcal06_ECRing Endcap Calorimeter driver and aligned geometry with ILD models. Established explicit hole offset handling, standardized use of derived dimensions, and removed cross-dependencies that caused overlaps in the ILC QD0 cryostat. Delivered updated XML configurations (SEcal06_siw_ECRing.xml, SEcal06_ECring.xml) and ensured the ILD models reference the new driver. These changes reduce integration risk, improve calorimeter geometry accuracy, and streamline future model maintenance.
February 2026
January 2026
1 Commits • 1 Features
Jan 1, 2026January 2026 — Key4hep/k4geo: Delivered Geant4 Step Tracking Enhancement for the TPC Hit Depositions, introducing a stepInfo structure to retain previous step data and improve hit deposit accuracy within the TPC action. This work includes a bug fix to TPCAction (addressing issue #551), along with code quality and observability improvements. The changes were implemented with clang-format, dd4hep logging, and a concise description of the TPC driver/action to aid onboarding. The deliverables contribute to higher fidelity simulations, improved debuggability, and reduced post-processing corrections for detector studies.
January 2026
1 Commits • 1 Features
Jan 1, 2026January 2026 — Key4hep/k4geo: Delivered Geant4 Step Tracking Enhancement for the TPC Hit Depositions, introducing a stepInfo structure to retain previous step data and improve hit deposit accuracy within the TPC action. This work includes a bug fix to TPCAction (addressing issue #551), along with code quality and observability improvements. The changes were implemented with clang-format, dd4hep logging, and a concise description of the TPC driver/action to aid onboarding. The deliverables contribute to higher fidelity simulations, improved debuggability, and reduced post-processing corrections for detector studies.
November 2025
1 Commits • 1 Features
Nov 1, 2025November 2025 delivered targeted enhancements to the key4hep/k4geo simulation module, focusing on realism and data integrity. Implemented Enhanced Simulation Environment: Vacuum World Material Setting and CAD-based MDI collection, anchored by commit a473d3fd3d7fb182530636f64d033f277d1c185d. This work improves simulation fidelity for vacuum scenarios and enables CAD-driven MDI material definitions, improving reproducibility and integration with CAD workflows. Minor code-quality improvements were performed to clean up whitespace and deduplicate MDI materials, contributing to stability without changing external behavior.
1 Commits • 1 Features
Nov 1, 2025November 2025 delivered targeted enhancements to the key4hep/k4geo simulation module, focusing on realism and data integrity. Implemented Enhanced Simulation Environment: Vacuum World Material Setting and CAD-based MDI collection, anchored by commit a473d3fd3d7fb182530636f64d033f277d1c185d. This work improves simulation fidelity for vacuum scenarios and enables CAD-driven MDI material definitions, improving reproducibility and integration with CAD workflows. Minor code-quality improvements were performed to clean up whitespace and deduplicate MDI materials, contributing to stability without changing external behavior.
November 2025
July 2025
1 Commits
Jul 1, 20252025-07 monthly summary: Key reliability improvement in magnetic field mapping within k4geo. Implemented a coordinate transformation fix to magnetic field components (x from cos(phi), y from sin(phi)) ensuring correct extraction from Br-Z field maps and alignment with standard coordinate conventions. This reduces potential systematic errors in detector simulations and enhances calibration fidelity. All work is traceable to commit 709ceaaafba3b11d714388e1890b810fa33df19a (#483).
July 2025
1 Commits
Jul 1, 20252025-07 monthly summary: Key reliability improvement in magnetic field mapping within k4geo. Implemented a coordinate transformation fix to magnetic field components (x from cos(phi), y from sin(phi)) ensuring correct extraction from Br-Z field maps and alignment with standard coordinate conventions. This reduces potential systematic errors in detector simulations and enhances calibration fidelity. All work is traceable to commit 709ceaaafba3b11d714388e1890b810fa33df19a (#483).
Activity
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Quality Metrics
Correctness85.0%
Maintainability85.0%
Architecture85.0%
Performance85.0%
AI Usage30.0%
Skills & Technologies
Programming Languages
C++XML
Technical Skills
C++C++ DevelopmentC++ programmingGeant4Physics SimulationSimulation SoftwareXML configurationdetector simulationmaterial sciencesimulation development
Repositories Contributed To
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