December 2025 — SBNSoftware/sbncode: Delivered a Geant4 Daughter Particle Trajectory Calculation Enhancement to include daughter particles in trajectory calculations, significantly improving the accuracy of weight calculations in the Geant4 simulation framework. The change addresses a daughter-particle handling bug and is backed by a focused commit (4ba47c2d9c94db812089ac1ae7df1c828831747c; 'fix g4rw daughters'). This work enhances simulation fidelity and reliability for physics analyses.

September 2025 monthly summary focusing on the delivery of optical-path related capabilities and build-system readiness within SBNSoftware sbndcode. The period prioritized enabling optical path simulations in OpT0Finder and stabilizing the build to support upcoming optical-path features, aligning with our analysis workflows and long-term physics goals.

Month: 2025-08 Focused on improving Photon Visibility export stability and ensuring reliable OpticalPath linking within DUNE/duneopdet. The work centers on code simplification, dependency management, and build correctness to support downstream analytics and plugin interoperability.

This month focused on strengthening detector simulation capabilities through OpticalPath integration, improved configuration for HD detectors, and documentation enhancements. The efforts culminated in faster loading times, more accurate optical simulations for large-scale DUNE detectors, and reduced risk from misconfigurations, supported by targeted commits across duneopdet and dunesw.

2024-12 Monthly summary for DUNE/duneopdet: Delivered Enhanced Photon Detection Simulation Configuration and refined the semi-analytical model to improve photon propagation modeling and detector response across configurations. Introduced MaxPDDistance parameter and updated default simulation settings to increase accuracy, enabling more reliable business decisions based on detector performance. Commit reference: 78866baf53999e42f86399b70afa13f9681f4985 (updates to semi-analytical model configuration). No major bugs fixed this month; focus was on feature delivery, configuration improvements, and model calibration. Overall impact: higher fidelity simulations across detector configurations, enabling better performance benchmarking and data-driven decision making. Technologies demonstrated: configuration-driven simulation, parameter management, version-controlled changes, and cross-config validation.

2024-10 Monthly Summary for SBNSoftware/sbndcode: Implemented a critical robustness feature: a defensive safeguard for CRT strip hits. When CRT strip hits data retrieval fails, the system now sets the strip hits to zero, enabling safe operation without errors. This prevents crashes or undefined behavior in missing-data scenarios and supports continuous processing even with incomplete inputs. Impact: improved reliability, reduced downtime, and smoother downstream analytics. Commit reference: 6c6c0ba68653ff63546862472e7cb10c9556c51d.