Week 42 · Oct 12–16, 2026

Oct 12–16, 2026

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Summary for Hall-B

• FT geometry cleanup: renamed/optimized outer flange, inner shield, bolts, mounts, adjusters, all synced CAD → runtime → run-dependent DB
• Moller cone and downstream beam tube: hole repairs, socket relief, mesh reduction, joint clearances across all run placements
• All 17 beamline configurations verified; tracking benchmarked before/after each optimization
• GEMC3 logging migrated to numbered message templates; multi-language catalogs (IT/JA/FR/ZH) with English fallback
• Field-plugin CLHEP dependency fixed properly (not a workaround); 361 local tests pass on Ubuntu 26.04 / GCC 15
• GEMC 6.2 release notes audited against 6.1 and filled in with missing geometry/CI/macro changes
• CAD optimization note extended all week with mesh-quality, tracking benchmarks, and reproducible evidence

GEMC

• Synced the renamed FT outer flange, inner shield, nine inner-shield bolts, outer mount, and FT flange across source CAD, runtime assets, and run-dependent database rows.
• Replaced the three FT adjuster placements with one synchronized material model and migrated the matching run-dependent CAD rows.
• Renamed and synced the Moller cone, its lead/inner/casing extensions, the cone tip, and a tungsten extension add-on, preserving all four run placements each time.
• Renamed the beamline adapter across CAD and DB rows with conservative mesh reductions; kept the original lead geometry.
• Relieved the downstream tube sockets, synced the corrected meshes, and finalized downstream mesh assets while retaining the original engineering models.
• Synced local FT/Moller cone joint corrections, preserving placements and materials.
• Audited GEMC 6.2 notes against tag 6.1 and added the missing geometry, digitization, macro, and CI changes; moved the latest LTCC geometry and benchmark notes from 6.1 to the upcoming 6.2.

Geant4

• Added isolated Geant4 fork installs with generated modules, custom refs and paths, and offline tests.
• Documented the fork argument parsing, Tcl path escaping, and atomic module publication in detail.

GEMC3

• Beamline/CAD geometry:
  • Repaired downstream beam tube annular seams without blocking the bore; reduced tessellation conservatively and extended the matched-primary benchmark.
  • Optimized the beamline apex shielding meshes with preserved topology and sharp features; renamed the hub and added a reproducible matched-primary benchmark.
  • Filled the Moller cone surface holes, enlarged the counterbore to clear the inner shield, reduced to 5k triangles, and retriangulated the end face to remove tracking boundary warnings after the joint correction.
  • Rebuilt the downstream FT inner shield with closed through-holes and retained grooves/blind recesses; optimized the FT outer flange, inner shield, outer mount, and simplified FT flange, all with archived originals and recorded material-volume changes.
  • Simplified nine copper bolts with matched material volumes and explicit tip gaps; unified the FT adjusters into one closed low-facet solid matched to the reference union volume.
  • Reduced the lead and inner cone extensions (bore, sharp features, and material preserved), repaired the inner extension and tungsten add-on radial-port walls, and reduced the cone tip to 5k triangles.
  • Cleared eight FT/cone interfaces with local bore reliefs while keeping the shield, flange, and tip.
  • Fixed beamline default-variation run selection and verified all 17 configurations with unchanged physical geometry.
  • Imported all CLAS12 beamline variations and raw CAD meshes, verified reference databases and Geant4 construction, recorded mesh warnings, and fixed collected CAD mesh paths (beamline, transverse, HTCC verified).
• Logging and localization:
  • Migrated GEMC and CLAS12 startup, macro diagnostics, and run summaries to numbered message templates with unchanged logging behavior; validated canonical methods and aliases.
  • Added generated English logging catalogs with extraction and placeholder validation, then IT/JA/FR/ZH catalogs for GEMC and CLAS12.
  • Added cached translations with automatic language selection, English fallback, and plugin catalogs; made catalogs independent of source line numbers and verified line-shift stability in CI.
  • Integrated runtime catalogs into the shared agent translation workflow with resumable validated batches; added agent-free catalog checks to GEMC and CLAS12 CI.
  • Added translated startup banner labels with version language overrides; validated GUI language behavior, layout, installation, docs, and concurrent translation state updates.
  • Documented the logger templates in the API guide and validated the generated Doxygen; fixed missing namespace pages and cross-module links for translated SVG toolbar helpers; fixed Qt geometry tree compilation by including the app translation declaration.
• Build and robustness:
  • Required shared CLHEP for plugins and added a regression check for worker random-engine state; replaced the CLHEP workaround with a verified fix for field-plugin dependencies after the logging changes — verified on Ubuntu 26.04 with GCC 15, all 361 local tests passing.
  • Fixed direct beamline execution by resolving shared run constants without the build environment; restored CLAS12 parent static linking so GEMC starts without shared CLHEP or Geant4 libs.
  • Added pygemc installation for CLAS12 builds using an installed GEMC and verified the Python tools.
  • Made unknown CLI flags a hard error with a did-you-mean suggestion, long-form normalization, and pre-exit validation; documented this in the 0.6 release notes.

Website

• Made a note’s XQuartz figure asset path root-relative so it resolves under localized language prefixes.

Publications

• Extended the CAD optimization note throughout the week with: downstream tube repairs; apex mesh quality, loading and memory improvements; smooth FT bolt geometry and shield-clearance checks; the renamed inner shield; the FT adjuster material-model study; the adapter rename and protected exit-casing reduction.
• Added the Moller cone hole repair, the smooth downstream inner-shield flange revision, the inner-shield reconstruction (with remaining cone interference noted), the outer-mount study with proven flange clearance, and a material-matched flange control, each with separate raw and clean-reference tracking benchmarks.
• Added the extension fill/casing mesh checks, the inner-extension port repair, FT flange mesh checks, cone-tip optimization, the downstream socket clearance revision, the FT/cone interface checks, and the tungsten add-on mesh checks — all with tracking comparisons and assembly diagnostics.
• Verified the study PDFs, benchmark provenance and hashes, archived inputs, and synchronized meshes; finalized the apex and downstream CAD optimization study with a proofed PDF; documented the beamline run-selection fix with construction evidence for every configuration.