d1/d60/HBHEMethod0Parameters__cfi_8py_source.html

import FWCore.ParameterSet.Config as cms


# Behavior of "Method 0" depends on the following top-level

# HBHEPhase1Reconstructor parameters:

#

# (bool) tsFromDB

# (bool) recoParamsFromDB

#

# and on the following parameters inside the "algorithm" parameter set,

# defined as m0Parameters below:

#

# (int) firstSampleShift

# (int) samplesToAdd

# (bool) correctForPhaseContainment

# (double) correctionPhaseNS

#

# The role of "tsFromDB" parameter is to specify whether the

# "sample of interest" (SOI) should be taken from the data frame

# (in case tsFromDB is False) or from the database (tsFromDB is True).

# Once SOI is determined in this manner, the time slice for starting

# the ADC charge summation (TSS) is determined by adding SOI and

# "firstSampleShift". "firstSampleShift" can be negative, and if

# TSS = SOI + firstSampleShift ends up negative, TSS is reset to 0.

# If you want to start summation from time slice 0, just set

# "firstSampleShift" to some negative number with large magnitude.

#

# In the old reco code, it used to be possible to configure the TSS

# using a parameter value. This is no longer the case for Phase 1

# reconstructor.

#

# The values of the remaining M0 parameters, "samplesToAdd",

# "correctForPhaseContainment", and "correctionPhaseNS", will be

# taken from the configuration file only if "recoParamsFromDB"

# is set to False. If "recoParamsFromDB" is True, the config

# file values of these parameters are ignored, and these values

# are instead taken from the database. The "samplesToAdd" parameter

# defines how many contiguous time slices will be used to calculate

# the charge. TSS + samplesToAdd should not exceed the number of

# time slices in the data frame, otherwise M0 will still work but

# the results will be unreliable.

#

# Parameter "correctForPhaseContainment" specifies whether

# a correction should be made for incomplete HPD signal collection

# inside the summed time slices, and "correctionPhaseNS" specifies

# the delay (in ns) of the HPD signal w.r.t. the ADC digitization

# clock edge. That is, in the reco code, increasing correctionPhaseNS

# moves reco window to the left w.r.t. the signal (AFAIK, the behavior

# of PhaseDelay QIE11 configuration register is the opposite).

#

m0Parameters = cms.PSet(

    firstSampleShift = cms.int32(0),

    samplesToAdd = cms.int32(2),

    correctForPhaseContainment = cms.bool(True),

    correctionPhaseNS = cms.double(6.0),

)