Difference between revisions of "Mcsmear updates"
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TRIGGER_LOOKBACK_TIME = -100 ns | TRIGGER_LOOKBACK_TIME = -100 ns | ||
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| + | Should we properly model readout windows? | ||
== CDC == | == CDC == | ||
Revision as of 18:47, 23 February 2016
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
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) |
Noise parameterization from 2007.
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] |
Noise simulation from 2007 (wires only?)
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
fixed in mcsmear
| 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
fixed in mcsmear
| 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
fixed in mcsmear
| name | value | comment |
|---|---|---|
| PS_SIGMA | 0.200 | time smearing factor |
| PS_NPIX_PER_GEV | 1.e5 | poisson smearing |
PSC
fixed in mcsmear
| name | value | comment |
|---|---|---|
| PSC_SIGMA | 0.200 | time smearing factor |
| PSC_PHOTONS_PERMEV | 5.e5 | Gaussian smearing |
