HcalTimeSlew Class Reference

#include <HcalTimeSlew.h>

Public Types
enum	BiasSetting { Slow =0, Medium =1, Fast =2 }
enum	ParaSource { TestStand =0, Data =1, MC =2, MCShift =3 }

Static Public Member Functions
static double	delay (double fC, BiasSetting bias=Medium)
	Returns the amount (ns) by which a pulse of the given number of fC will be delayed by the timeslew effect, for the specified bias setting. More...
static double	delay (double fC, ParaSource source=TestStand, BiasSetting bias=Medium)

Detailed Description

Provides pulse delay as a function of amplitude for three choices of QIE bias setting. The "Medium" setting is used in HB and HE, while the "Slow" (and lower noise) setting is used in HO. All data taken from bench measurements of the QIE and plotted in Physics TDR Vol 1.

Not to be used for HF at this time (unlikely to have much effect, however)

Author

J. Mans - Minnesota

Definition at line 18 of file HcalTimeSlew.h.

Member Enumeration Documentation

enum HcalTimeSlew::BiasSetting

Enumerator
Slow
Medium
Fast

Definition at line 21 of file HcalTimeSlew.h.

{ Slow=0, Medium=1, Fast=2 };

enum HcalTimeSlew::ParaSource

Enumerator
TestStand
Data
MC
MCShift

Definition at line 20 of file HcalTimeSlew.h.

{ TestStand=0, Data=1, MC=2, MCShift=3 };

Member Function Documentation

double HcalTimeSlew::delay ( double  fC, BiasSetting  bias = Medium  )

static

Returns the amount (ns) by which a pulse of the given number of fC will be delayed by the timeslew effect, for the specified bias setting.

Definition at line 8 of file HcalTimeSlew.cc.

References cmsBatch::log, slope, tmax, and tzero.

Referenced by HcalDeterministicFit::apply(), HcalPulseContainmentAlgo::calcpair(), HcalTimeSlewSim::delay(), delay(), HcalHitCorrection::delay(), HcalDeterministicFit::pulseFraction(), PulseShapeFitOOTPileupCorrection::pulseShapeFit(), and HcalSimpleRecAlgoImpl::reco().

                                                      {
  double rawDelay=tzero[bias]+slope[bias]*log(fC);
  return (rawDelay<0)?(0):((rawDelay>tmax[bias])?(tmax[bias]):(rawDelay));             
}

double HcalTimeSlew::delay ( double  fC, ParaSource  source = TestStand, BiasSetting  bias = Medium  )

static

Definition at line 13 of file HcalTimeSlew.cc.

References delay(), cmsBatch::log, MC, min(), and TestStand.

                                                                         {

  if (source==TestStand) {
    return HcalTimeSlew::delay(fC, bias);
  }
  else if (source==Data) {
    //from john 2/20 talk: indico.cern.ch/event/375365/contribution/9/material/slides/5.pdf
    return 13.98-3.20*log(fC+32)-2.82965+10;
  }
  else if (source==MC) {
    // from Xinmei
    //return 10.491-2.25495*log(fC+7.95067);
    
    //FCN=1075.01 FROM MIGRAD    STATUS=CONVERGED      34 CALLS          35 TOTAL
    //EDM=1.84101e-19    STRATEGY= 1      ERROR MATRIX ACCURATE 
    //EXT PARAMETER                                   STEP         FIRST   
    //NO.   NAME      VALUE            ERROR          SIZE      DERIVATIVE 
    //1  p0           9.27638e+00   3.45586e-02   1.17592e-04   8.21769e-08
    //2  p1          -2.05585e+00   1.10061e-02   3.74505e-05   2.58031e-07

    return std::min(6.0,9.27638-2.05585*log(fC));
    
  }  
  return 0;
}