Summer 2020 DIRC Commissioning

Preliminary Schedule

• 9/1 Installation and survey until ~18:00
• 9/1 18:00 - 9/2 04:00 -- Straight-track data (10 hours, Tuesday night)
• 9/2 04:00 - 9/2 12:00 -- Ramp solenoid magnet (8 hours, Wednesday day)
• 9/2 12:00 - 9/3 06:00 -- Full-field data: tracking mode (18 hours, Wednesday night)
• 9/3 06:00 - 9/3 10:00 -- Full-field data: TRD mode (4 hours, Thursday day)
• 9/3 De-installation -- Technical crew de-install in the afternoon?

Notes:

• Assumes ~50% beam availability as normal. Schedule could be delayed if beam is down for prolonged period
• Could do activities which don't require solenoid on Wednesday (9/2) morning while magnet is ramping

Calibration datasets

Summary page for Summer 2020 TRD/GEM Commissioning lists the relevant run ranges for the datasets collected below

Straight-track data

• For alignment of the GEM/TRD we need to acquire production samples with the magnetic field off
• Straight-track sample at the beam-center TRD positions with the full GEM readout for tracking and alignment studies
  • Standard GlueX no-field measurements with 50nA on 10^-4 amorphous radiator
  • 2 hours: focused FCAL trigger in GEM location to verify TRD/GEM signals (raw mode)
  • 8 hours: standard FCAL-BCAL trigger for alignment data

Full-field data: tracking mode

• With the aligned GEM/TRD collect data for track extrapolation validation and multi-plane tracking directly upstream of DIRC
• Full solenoid field sample at the beam-center TRD positions with the full GEM readout for tracking and alignment studies
  • Standard GlueX running conditions at 150nA, 250 nA and 350nA: diamond 0/90 PARA
  • 2 hours: focused FCAL trigger in GEM location (FCAL_TRACK_CENT_m9.conf) to verify TRD/GEM signals (raw mode)
  • 8 hours: standard FCAL-BCAL trigger at 150 nA (low energy TAGH turned on)
  • 4 hours: standard FCAL-BCAL trigger at 250 nA (low energy TAGH turned off)
  • 4 hours: standard FCAL-BCAL trigger at 350 nA (low energy TAGH turned off)

Full-field data: TRD mode

• For pion rejection performance acquire samples with the TRD in "cluster counting" mode with all the GEM packages read out.
• Operate TRDs with two different gasses using raw mode (Lubomir and Sergey are required for these runs)
  • 4 hours: standard FCAL-BCAL trigger

Required personnel

• Expert in counting house or on-call for changes in configuration

Tentative Shift Schedule

Date	Shift	Leader	Expert
Tue Sep 1	4 pm - 10 pm	D. Mack	Sergey (on-site)
Tue Sep 1	10 pm - 4 am	D. Lersch	Justin
Wed Sep 2	4 am - 10 am	E. Smith	Justin
Wed Sep 2	10 am - 4 pm	A. Somov	Sergey/Lubomir

Detector location and plane labeling

Lubomir's presentation