Mcsmear updates

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

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