Difference between revisions of "Spring 2019 DIRC Commissioning"

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(Commissioning Tasks and Milestones)
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== Commissioning Tasks and Milestones ==
 
== Commissioning Tasks and Milestones ==
* Develop Translation Table  
+
* Develop EVIO parser and Translation Table  
 
* Develop scripts for LED timing offset calibration
 
* Develop scripts for LED timing offset calibration
 
* Calibration document with expected tables for CCDB
 
* Calibration document with expected tables for CCDB

Revision as of 06:33, 9 August 2018


Commissioning Goals

  • Integrate DIRC readout with general Hall D DAQ and online/offline monitoring
  • Calibrate per-pixel timing offset of MAPMTs using LED system
  • Determine geometric alignment parameters (position and angle offsets) for optical components
  • Implement reconstruction algorithm and compare data/MC: # detected photons, Cherenkov angle resolution

Commissioning Observables

  • "Ring" images for tracks with fixed kinematics
  • Number of detected photons/track
  • Timing difference between measured - expected
  • Single photon resolution (SPR) per pixel

Commissioning Tasks and Milestones

  • Develop EVIO parser and Translation Table
  • Develop scripts for LED timing offset calibration
  • Calibration document with expected tables for CCDB

Commissioning Timeline

  • July 16-30: Integration of DIRC crate with DAQ and initial test of readout with standalone MAPMT module (Ben, Sergey, Sasha)
  • August
    • Implementation of DAQ decoder for SSP data format in sim-recon to create low level hit objects (David)
    • Implementation of Translation Table in CCDB to orient (FPGA, channel ID) mapping from readout into physical pixel coordinates (X, Y) position along readout window (David, Justin, Bill)
    • Online and offline monitoring plugins to monitor LED data occupancies and timing distributions (W&M)
      • Include DIRC hit patterns in event display?
  • October 29 - November 18 (3-week install period):
    • Verify cabling and translation table with LED data (unique patterns of HV on/off)
    • Initial time offset calibrations with LED data
    • HV and threshold scans with LED data
  • November 19 - December 19 (commissioning with beam):
    • TBD

Datasets to acquire with integrated DAQ

HV and threshold scans

  • Similar set of HV, MAROC gain, and threshold settings as laser setup for comparison with final implementation
  • Validate MAPMT characterization with both LED calibration and beam data

Intensity scans

  • Evaluate rate dependence and backgrounds for both high and low luminosity
  • Scans of fixed amorphous radiator and varied current from 50 - 300 nA

Simulation studies for commissioning

Requirements

  • Final "as built" geometry in CCDB with appropriate run number
  • Define JANA calibration variation for CCDB specific to DIRC(?)
  • LUT algorithm implemented as factor in DIRC sim-recon library

Data Samples

  • bggen sample (1M events) for comparison of rates and occupancies with data
  • single track pion and kaon samples in kinematic bins for comparison with data