Week 44 · Oct 26–30, 2026

Oct 26–30, 2026

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Summary for Hall-B

• Fixed and updated production cuts across 50 GEMC dev cards (all 46 volumes resolve)
• OSG portal: fixed empty completions chart (cron + rolling 10-day window), run metadata/dropdown cleanup, raised job ceilings
• GEMC3: RICH geometry and digitization imported and validated; standardized SQLite banks by run
• Reported G4MuPairProductionModel high CPU/call count to Geant4
• NERSC: Perlmutter login working; CVMFS jlab repo granted, effective Nov 11 maintenance
• Torus model improvement meeting with colleagues

GEMC

• Fixed multiline production-cut values in the development cards; GEMC2 now resolves all 46 selected volumes.
• Updated production cuts in fifty development cards to current volume names, keeping the 20 mm thresholds.
• Met with colleagues to work on improving our torus model.
• CLAS12 CAD optimization note: added CAD mesh-reduction and scoped performance summary tables, and added/cited STL, STEP, and FreeCAD references.

OSG

• Diagnosed the empty portal “Completed events” chart: done/completion_time were never populated because the marking cron was not scheduled. Added mark_completed_submissions –write-to-db cron entries (prod and devel) to the portal crontab, and fixed a cron SyntaxError by rewriting the script in the conservative Python style used by the other cron scripts.
• Built the completions table from MySQL by adding done and completion_time columns to submissions, stamped at completion; changed the chart from a previous-calendar-week table to a rolling last-10-days window (events in millions per day). Wrote a db_io README documenting the MySQL query commands and their database.py equivalents.
• A user was notified their file was not readable from OSG; after their fix, the job was released.
• Made the linked portal configuration available inside the local Apache Docker container.
• Updated real-run portal fields, vertex settings, and background choices from run metadata; mapped rge_spring2024_sol and rge_spring2024_liq to the shared rge_spring2024 background file directory.
• Capped lund submissions at 10,000 files, truncating larger directories to the first 10,000 with a warning.
• Standardized the run dropdown label to readable beam/magnet fields; offered a run’s background_path or No in the merging dropdown, fixed to No when background_path is empty; stopped the software-version dropdown from rebuilding and clearing the run selection.
• Raised the dev portal (–devel) job ceiling to 90,000 while keeping production at 80,000.

Geant4

• Reported an unusual, high number of calls and CPU cycles for G4MuPairProductionModel.

GEMC3

• Deferred pre-initialization physics cuts to avoid missing-default-region aborts, and validated all switching modes.
• Simplified LTCC, DC, and magnets runners with shared CAD and database helpers; verified identical SQLite and ASCII output, regeneration, and retired-bank cleanup.
• Standardized native and CAD SQLite banks by run across all detectors; verified 47 construction cases.
• Imported RICH geometry and digitization with 228 unchanged STLs and geometry/HIPO CI in both engines; validated RICH runs and 20k-event field/no-field samples and recorded residual timing and yield differences.
• Added Mie scattering and roughness support with Python and legacy-material regression tests.
• Traced RICH timing differences to Geant4 versions and yield differences to primary sampling; recorded provenance.

NERSC

• Successful login to Perlmutter.
• jlab cvmfs node not mounted — requested via ServiceNow. The CVMFS jlab repository addition was granted; it becomes effective at the next Perlmutter maintenance on November 11th.

Actions

• Homepage CI: pinned to Ubuntu 24.04 to avoid Ruby setup failing on Ubuntu 26.04, then switched to Ubuntu 26.04 with current Ruby setup and the latest Ruby 3.4 patch.

Slides

• Converted slide binaries to Git LFS using the publications policy and documented the checkout setup.
• Mined the CLAS Collaboration Meeting archive and added twenty missing talks to the GEMC presentations list.

Personal Homepage

• Generalized presentation format links across the homepage, showcase, and GEMC pages for PDF, KEY, and PPTX.