Difference between revisions of "Spring 2019 DIRC Commissioning"
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== Commissioning Tasks and Milestones == | == Commissioning Tasks and Milestones == | ||
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| + | * Develop scripts for LED timing offset calibration | ||
== Commissioning Timeline == | == Commissioning Timeline == | ||
Revision as of 09:47, 18 July 2018
Contents
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 Tasks and Milestones
- Translation Table
- Develop scripts for LED timing offset calibration
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
