Difference between revisions of "DIRC Software Tasks"

Revision as of 10:04, 17 December 2018

The software tasks to be completed for a successful DIRC commissioning are listed below under several categories. Please contact Justin Stevens if you're able to contribute to one of these activities.

Simulation

• Implement "as-built" geometry in HDDS xml, including all support structures and material inside the bar boxes (Yunjie/Maria)
  • Implement individual bar sizes from spreadsheet provided by Matt
• Add smearing of DIRC truth hits in mcsmear to write out DIRCPmtHit object with time and pixel ID. Include time resolution smearing (Justin)
  • Add per-pixel efficiency from analysis of PMT module tests, with values eventually coming from CCDB tables (Andrew)
  • Add cross talk from analysis of PMT module tests (TBD)
• Switch hdgeant4 to using "measured" times in GlueXSensitiveDetectorDIRC, instead of using "time_fixed". Requires similar modification to LUT reconstruction to include flight time of particle relative to other detectors. (Justin)
  • A bug was identified in the propagation time by Roman, and Justin submitted an issue to Richard on the HDGeant4 GitHub.
• Add LED generator to hdgeant4/src/GlueXPrimaryGeneratorAction (similar to LUT generator) for developing timing calibration scripts. (Yunjie)

Reconstruction

• Create DDIRCGeometry to retrieve necessary info from XML: including GetBar(Y) function to return bar ID for extrapolated tracks (Justin)
  • Add conversion of pixel number to position space (Justin)
• Add CustomAction to dirc_reactions plugin to split tracks into kinematic bins, and fill histograms of thetaC, likelihood, hit patterns, etc. (Justin)
  • Separate tracks by bar, x position (5 cm bins) and momentum (0.5 GeV bins)
• Add DIRCHits as associated objects to tracks, so they can be used more easily in later analysis stages (TBD)
  • Studies size increase for REST files if these are included
• Add time imaging reconstruction to libraries/DIRC (Maria)
• Add FastDIRC reconstruction to libraries/DIRC (Cris?/Yunjie)

Data

• Write DDIRCTDCHit decoder in libraries/DAQ for parsing raw data (David)
  • Initial version works pull request, but and has been checked with data
• Write DDIRCDigiHit in libraries/DIRC to be used in TTAB/DTranslationTable.cc to convert hardware ID to pixel ID (Bill/Justin)
• Write DDIRCPmtHit_factory in libraries/DIRC to read DDIRCDigiHit, do time-walk correction, and write out the same object as mcsmear (Justin)
• Calibration plugin and scripts for timing offsets from LED data (Yunjie)
  • Test with simulation of LED signal generator in hdgeant4
  • Include reference time from LED pulser and SiPM monitor (fADC and TDC)

Event Display

• Write class which provides 3D position for pixel from DDIRCHit object which can be used in Thomas's event display (TBD)
• Long term: create database of expected hit patterns for (PID, bar, x position, and momentum). Goal is to superimpose expected pattern histogram behind hits for individual events to see if they match (TBD)