Mcsmear updates
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Contents
Tasks
- Dead channel handling - Sean
- Run-dependent values from RCDB - Sean & Dmitry
- Smearing updates - Detector groups
Other possible tasks:
- Truth-reconstructed checks on hit-level quantities?
- Improved tagger simulation?
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
TBD
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 |