Difference between revisions of "Fall 2019 Commissioning Meetings"

From GlueXWiki
Jump to: navigation, search
(Tuesday, January 14)
Line 32: Line 32:
** Fall 2019 (new mirror box geometry): running hdgeant4, etc. today... dirc_tree files later this week
** Fall 2019 (new mirror box geometry): running hdgeant4, etc. today... dirc_tree files later this week
* Current analysis updates
* Current analysis updates
** FastDIRC (Yunjie)
** FastDIRC ([https://halldweb.jlab.org/wiki/images/8/84/FastDIRC_011420.pdf Yunjie])
* Upcoming analysis plans
* Upcoming analysis plans

Latest revision as of 10:57, 14 January 2020

Meeting Information

GlueX DIRC Meeting
Tuesdays and Thursdays, December 3-19 + January 14
10:00 am, EDT
Hall D Counting House

Connection Using Bluejeans

  1. To join via Polycom room system go to the IP Address: (bjn.vc) and enter the meeting ID: 846453895.
  2. To join via a Web Browser, go to the page [1] https://bluejeans.com/846453895 .
  3. To join via phone, use one of the following numbers and the Conference ID: 846453895
    • US or Canada: +1 408 740 7256 or
    • US or Canada: +1 888 240 2560
  4. More information on connecting to bluejeans is available.

Useful Links:

Tuesday, January 14

  • Spring 2019 DIRC Commissioning Analysis
  • Fall 2019 Commissioning Analysis
  • Initial production of Fall 2019 data available:
    • dirc_tree files: /cache/halld/detectors/DIRC/RunPeriod-2019-11/dirc_monitoring/ver01/hists/merged/
    • DIRC LED skims: /cache/halld/RunPeriod-2019-11/calib/ver01/DIRC-LED/
    • REST files: /cache/halld/detectors/DIRC/RunPeriod-2019-11/dirc_monitoring/ver01/REST/
  • New simulation samples (50M ρ and φ events each):
    • Spring 2019 (previous commissioning, South Box only): producing dirc_tree files now ... slowly
    • Fall 2019 (new mirror box geometry): running hdgeant4, etc. today... dirc_tree files later this week
  • Current analysis updates
  • Upcoming analysis plans

Thursday, December 19

  • Reconstruction of runs 70817-71073 almost complete (~8 billion of the 10 billion triggers collected so far):
    • REST, histogram and tree files appearing at: /volatile/halld/home/gxproj7/RunPeriod-2019-11/dirc_monitoring/ver00
    • Plan for data production over downtime
  • Summary of production datasets
  • LED analysis:
  • GEM update and analysis plans discussion
  • High rate studies:
  • Plans for shutdown:
    • LED runs for HV/threshold scans on Friday after beam down
    • LV and HV off over break, but no mechanical changes planned
  • Investigation of North OB in January:
    • Proposal to drain North OB, inspect Bar Box 0 optical coupling to mirror box (misalignment?), inspect mirrors
    • Beam could be back as early as January 7, so we can likely only observe the situation and seal things back up.

Tuesday, December 17

  • Initial data analyses (early runs 70817-70849):
    • Standard halld_recon LUT: [3]
    • FastDIRC: [4]
    • LED analyses north box [5]
  • Total statistics around ~6 billion triggers so far, should get close to statistics we had last Spring (~10 billion total)
  • Upcoming plans:
    • Remaining GEM data with focused FCAL trigger
    • Additional DIRC threshold/gain/HV settings:
    • High rate tests: paths to eliminate DIRC as bottleneck

Thursday, December 12

  • Initial data (70817-70849) reconstruction complete:
    • REST, histogram and tree files appearing at: /volatile/halld/home/gxproj7/RunPeriod-2019-11/dirc_monitoring/ver00
  • Waiting for runs 70937+ to be transferred to the /cache/ disk
  • VERY preliminary first look with FastDIRC
  • Upcoming plans:
    • More GEM data with focused FCAL trigger
    • High rate trigger/DAQ tests, including DIRC (Sasha)
    • CPP test, 1 hr (David)

Tuesday, December 10

  • First field-on data Friday evening: Run 70817+
    • Initial issues with timing now resolved and data processing some plots
    • Initial data reconstruction underway:
      • REST, histogram and tree files appearing at: /volatile/halld/home/gxproj7/RunPeriod-2019-11/dirc_monitoring/ver00
  • Unfortunate data loss before accelerator vacuum issue: Run 70850-70895: https://logbooks.jlab.org/entry/3750309
  • LED Analysis: (Ahmed/Bill/Andrew)
  • Upcoming plans:
    • When beam is back continue with nominal conditions: Threshold = pedestal + 100, equalized gains, HV = 1000 V
    • Dedicated runs with GEM detector included with low trigger rate

Thursday, December 5

  • Collected straight track data in "beam left" position: see correlations with TRD wire chamber and GEM SRS (APV) modules
    • A couple runs with DIRC included for initial tests (70720 and 70721)
  • LED Analysis: (Ahmed/Bill)
  • Upcoming plans:
    • Today/tonight: Straight track data in center and right positions by Friday morning.
    • Friday: Ramp solenoid and setup for DIRC commissioning
    • Weekend: DIRC commissioning with full solenoid field!

Tuesday, December 3

  • Status update from the Hall
  • Plans for straight track data