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)
• 9/2 04:00 - 9/3 12:00 -- Ramp solenoid magnet (8 hours)
• 9/3 12:00 - 9/4 06:00 -- Full field data: tracking mode (18 hours)
• 9/4 06:00 - 9/5 10:00 -- Full field data: TRD mode

Detector location and plane labeling

Lubomir's presentation

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
  • 2 hours: focused FCAL trigger in GEM location 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 TRD pion rejection performance acquire production 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 required)
  • 4 hours: standard FCAL-BCAL trigger