Difference between revisions of "Action Items"

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m (Event generators (should be in the PrimEx analysis directory))
 
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=== Event generators (should be in the PrimEx analysis directory) ===
 
=== Event generators (should be in the PrimEx analysis directory) ===
  
1. Signal Primakoff  
+
1. Signal Primakoff (Iliya)
2. Coherent / incoherent background
+
 
3. Hardonic background (generate MC samples of contributing decays)
+
2. Coherent / incoherent background (Iliya)
 +
 
 +
3. Hadronic background (generate MC samples of contributing decays)  (Tim)
  
  
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::*  Currently have simple 'Klein Nishina' generator with 1/E energy-dependent spectrum
 
::*  Currently have simple 'Klein Nishina' generator with 1/E energy-dependent spectrum
 
::* Need to implement realistic shape of photon spectrum (efficiency)
 
::* Need to implement realistic shape of photon spectrum (efficiency)
5. Double Compton Generator (Pavel)
+
5. Double Compton Generator (Pavel/Igal)
  
  
 
6. Need to generate MC samples according to realistic run conditions (samples for each run)
 
6. Need to generate MC samples according to realistic run conditions (samples for each run)
 
  
 
=== Calibration ===
 
=== Calibration ===
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=== MC simulation (GEANT) ====
+
=== MC simulation (GEANT) ===
  
 
1. Adjust position of the CCAL according to the survey data
 
1. Adjust position of the CCAL according to the survey data
  
2. Adjust position of the FCAK according to the survey data
+
2. Adjust position of the FCAL according to the survey data
 +
 
 +
3. CCAL Reconstruction
 +
 
 +
::* Fine tune energy resolution
 +
::* Adjust parameters of the Island algorithm (Drew)
 +
 
 +
4. Update energies of the tagger hodoscope and microscope
 +
::: wrong CCDB tables are used
 +
 
 +
5. Correct photon beam energy in both MC and reconstruction
 +
 
 +
 
 +
6. Efficiency and resolution studies
 +
:::* compare MC with data using some reference channels
 +
:::* FCAL angular resolution
 +
:::* superimpose electromagnetic background in MC
 +
 
 +
=== Preparation for data processing ===
 +
::: Skims and monitoring plots
 +
 
 +
1. Di-photon skim
 +
 
 +
2. Single cluster/hit skim (Igal)
 +
 
 +
3. Trees for FCAL masks (Chandra)
 +
 
 +
4. Trees for luminosity (Sasha)
 +
 
 +
5. CCAL / FCAL stability (?)  (Drew, Chandra, Tim)
 +
 
 +
 
 +
6. What info we need to add to the REST format (?)
 +
:::* Check REST files
 +
 
 +
=== Luminosity ===
 +
 
 +
1. Refine PS acceptance
 +
 
 +
2. Interface with the CCDB to retrieve lumi numbers for specific energy range (bin)  (Sasha)
 +
 
 +
3. Apply corrections to lumi, account for non-uniformity of bunches
 +
 
 +
=== Compton Cross Section Measurement ===
  
3. Adjust CCAL energy resolution
+
=== Reconstruction of Primakoff events ===

Latest revision as of 13:27, 4 September 2020

Event generators (should be in the PrimEx analysis directory)

1. Signal Primakoff (Iliya)

2. Coherent / incoherent background (Iliya)

3. Hadronic background (generate MC samples of contributing decays) (Tim)


4. Compton with rad corrections

  • Currently have simple 'Klein Nishina' generator with 1/E energy-dependent spectrum
  • Need to implement realistic shape of photon spectrum (efficiency)

5. Double Compton Generator (Pavel/Igal)


6. Need to generate MC samples according to realistic run conditions (samples for each run)

Calibration

(need to finalize calibrations before we start reprocessing PrimEx data)

1. Timing calibration for FCAL, CCAL (ST, TOF, BCAL, tagging detectors)

2. Recalibrate CCAL (non-linearity corrections) -- Drew

  • Adjust tagger energy scale -- Sasha

3. FCAL calibration

  • Do we use official GlueX cluster reconstruction or an Island algorithm ?
  • How many calibration versions (run periods) we need ? Check with LED data (Chandra)

4. FCAL dead/suspicious channels in the CCDB (Chandra)

  • exclude channels from MC and reconstruction


MC simulation (GEANT)

1. Adjust position of the CCAL according to the survey data

2. Adjust position of the FCAL according to the survey data

3. CCAL Reconstruction

  • Fine tune energy resolution
  • Adjust parameters of the Island algorithm (Drew)

4. Update energies of the tagger hodoscope and microscope

wrong CCDB tables are used

5. Correct photon beam energy in both MC and reconstruction


6. Efficiency and resolution studies

  • compare MC with data using some reference channels
  • FCAL angular resolution
  • superimpose electromagnetic background in MC

Preparation for data processing

Skims and monitoring plots

1. Di-photon skim

2. Single cluster/hit skim (Igal)

3. Trees for FCAL masks (Chandra)

4. Trees for luminosity (Sasha)

5. CCAL / FCAL stability (?) (Drew, Chandra, Tim)


6. What info we need to add to the REST format (?)

  • Check REST files

Luminosity

1. Refine PS acceptance

2. Interface with the CCDB to retrieve lumi numbers for specific energy range (bin) (Sasha)

3. Apply corrections to lumi, account for non-uniformity of bunches

Compton Cross Section Measurement

Reconstruction of Primakoff events