Difference between revisions of "Mcsmear updates"
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* [[Mixing Simulated Events]] | * [[Mixing Simulated Events]] | ||
− | == Channel | + | == Per-Channel Efficiency == |
The following principles should be followed when determining detector efficiencies that will be applied in mcsmear: | The following principles should be followed when determining detector efficiencies that will be applied in mcsmear: |
Revision as of 18:33, 16 March 2016
Contents
Tasks
- Dead channel handling - Sean
- Tables that exist
- FCAL/block_quality
- PHOTON_BEAM/microscope/fiber_quality
- PHOTON_BEAM/hodoscope/counter_quality
- Tables that need to be added (suggested names)
- CDC/channel_quality
- START_COUNTER/paddle_quality
- BCAL/channel_quality
- FDC/package[1-4]/wire_quality
- FDC/package[1-4]/strip_quality
- TOF/paddle_quality
- Smearing updates - Detector groups
- See below
- Run-dependent values from RCDB - Sean & Dmitry
- Mixing Simulated Events
Per-Channel Efficiency
The following principles should be followed when determining detector efficiencies that will be applied in mcsmear:
- Efficiencies should not be set to zero unless the channel was actually disabled during the runs
- Efficiencies should be determined for each channel.
- Efficiencies should be determined either on a run-by-run basis or as an average over a group of runs
- Efficiencies should be determined in way that is unbiased by the trigger
Current Settings
Will set table fields to "green" when updated.
Should load parameters from CCDB where possible.
General Comments
Smearing is performed by adding a Gaussian function, unless otherwise described.
TRIGGER_LOOKBACK_TIME = -100 ns
Should we properly model readout windows?
CDC
name | value | comment |
---|---|---|
CDC_TIME_WINDOW | 1000. | readout window (ns) |
CDC_PEDESTAL_SIGMA | 50.0 | charge smearing factor |
CDC_THRESHOLD_FACTOR | 4.0 | sparsification threshold = CDC_THRESHOLD_FACTOR* CDC_PEDESTAL_SIGMA |
CDC_TDRIFT_SIGMA | 2.8181818181818e-9 | drift time smearing width*1.0e-9 (ns) |
HDGeant calculations that need revisiting:
- longitudinal drift
- gain
FDC
name | value | comment |
---|---|---|
FDC_TIME_WINDOW | 1000. | readout window (ns) |
FDC_CATHODE_SIGMA | 150.0 | cathode charge smearing factor |
FDC_PED_NOISE | -> | charge smearing factor = -0.0938 + 0.0485*FDC_CATHODE_SIGMA |
FDC_THRESHOLD_FACTOR | 4.0 | sparsification threshold = FDC_THRESHOLD_FACTOR * FDC_PED_NOISE |
FDC_TDRIFT_SIGMA | 1.0-9 | drift time smearing width*1.0e-9 (ns) [both wire and cathode] |
HDGeant calculations that need revisiting:
- wire drift calculation?
- lorentz effects?
FCAL
name | value | comment |
---|---|---|
FCAL_BLOCK_THRESHOLD | 0.02 | (GeV) |
time smearing | 200. | fixed in mcsmear (ps) |
FCAL_PHOT_STAT_COEF | 0.035 | |
energy smearing | -> | 1.0 + Gaussian( FCAL_PHOT_STAT_COEF / sqrt(E) ) |
BCAL
name | value | comment |
---|---|---|
BCAL_TWO_HIT_RESOL | 50. | |
BCAL_ADC_THRESHOLD_MEV | 1. | |
BCAL_FADC_TIME_RESOLUTION | 0.3 | (comment: to be updated) |
BCAL_TDC_TIME_RESOLUTION | 0.3 | (comment: to be updated) |
BCAL_SAMPLINGCOEFA | 0.042 | |
BCAL_SAMPLINGCOEFB | 0.013 | |
BCAL_MEV_PER_ADC_COUNT | 0.029 |
TOF
name | value | comment |
---|---|---|
TOF_SIGMA | 0.155563 | time smearing factor |
TOF_PHOTONS_PERMEV | 8000. | conversion factor |
dE smearing | -> | Gaussian(sqrt(npe)) |
TOF_THRESH_MEV | 0 | threshold on smeared dE |
START COUNTER
name | value | comment |
---|---|---|
START_SIGMA | 0.3 | time smearing factor |
START_PHOTONS_PERMEV | 200. | conversion factor |
dE smearing | -> | Gaussian(sqrt(npe)) |
STC_THRESH_MEV | 0 | threshold on smeared dE |
TAGM
name | value | comment |
---|---|---|
TAGM_TSIGMA | 0.200 | TDC smearing factor |
TAGM_FADC_TSIGMA | 0.350 | fADC smearing factor |
TAGM_NPIX_PER_GEV | 1.e5 | poisson smearing |
TAGH
name | value | comment |
---|---|---|
TAGH_TSIGMA | 0.350 | TDC smearing factor |
TAGH_FADC_TSIGMA | 0.450 | fADC smearing factor |
TAGH_NPIX_PER_GEV | 5.e5 | poisson smearing |
PS
name | value | comment |
---|---|---|
PS_SIGMA | 0.200 | time smearing factor |
PS_NPIX_PER_GEV | 1.e5 | poisson smearing |
PSC
name | value | comment |
---|---|---|
PSC_SIGMA | 0.200 | time smearing factor |
PSC_PHOTONS_PERMEV | 5.e5 | Gaussian smearing |