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Tasks for detectors

  1. Detector map has been setup by Wendy. Available as detmap_e01020 in directory /work/halla/e01020/standard.
  2. The latest database is db_e01020 in  directory /work/halla/e01020/standard.
  3. Left arm (for electrons)
    1. VDC  (Eric)
      1. Determine t0 (after beta opt)
      2. Need online relative efficiency
      3. What cuts to appply to determine good track?
      4. VDC tracking efficiency as function of rate?
    2. Scintillators (S1,S2,S0)   (Pierre)
      1. Efficiency kumac using S0. S. Kozlov has studied this using S1 and S2. Link to his talk at Hall A analysis

        2. workshop
      2. Beta opt. and check coincidence timing. Mark has worked on beta opt.
      3. Gain matching
    3. Gas Cerenkov (ODU)
      1. Gain Matching. Pierre has done this.
      2. Determine efficiency. Any position dependence?
    4. FPP
      1. Determine if FPP can be used for determining VDC efficiency as function of position. Wendy  is working on this with ndelta data.
      2. Get it working with Wang Xu's espace and set proper operating conditions with Ar-C02 gas mixture. Mark is working on this.
    5. PionRejector (ODU)
      1. Gain Matching
      2. Determine efficiency. Any position dependence?
  4. Right arm (for protons for data, electrons for optics)
    1. VDC   (Eric)
      1. Determine t0 (after beta opt)
      2. Need online relative efficiency
      3. What cuts to appply to determine good track?
      4. VDC tracking efficiency as function of rate?
    2. Scintillators (S1,S2)
      1. Efficiency kumac. Some thought about losses due to nuclear effects. S. Kozlov has studied this using S1 and S2. Link to his talk at Hall A analysis workshop
      2. Beta opt. and check coincidence timing. Mark has done the beta opt.
      3. Gain matching
      4. Some thought about setting HV since proton momentum throughout experiment covers a large range
      5. Need to change the thresholds or low HV during run?
    3. Aerogel Mirror  (Mark)
      1. Gain Matching. Pierre has done this.
      2. Determine efficiency. Any position dependence?
    4. Diffusion Aerogel   (Mark)
      1. Gain Matching. Pierre has done this.
      2. Determine efficiency. Any position dependence?
      3. Report by Lingyan Zhu on A1 and A2 aerogel.
      4. Web page about A2
    5. Gas Cerenkov
      1. Gain Matching. Pierre has done this.
      2. Determine efficiency. Any position dependence? Low priority since only used for optics.
    6. PreShower and Shower
      1. Necessary for optics?