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Stephen A. Wood authoredStephen A. Wood authored
THcRaster.cxx 8.52 KiB
// Author : Buddhini Waidyawansa
// Date : 12-09-2013
///////////////////////////////////////////////////////////////////////////////
// //
// THcRaster //
// //
// A class to decode the fast raster signals. //
// Measures the two magnet currents which are propotioanl to horizontal and //
// vertical beam position //
// //
///////////////////////////////////////////////////////////////////////////////
#include "THcRaster.h"
#include "THaEvData.h"
#include "THaDetMap.h"
#include "THcParmList.h"
#include "THcGlobals.h"
#include "THaGlobals.h"
//#include "THcHitList.h"
#include <cstring>
#include <cstdio>
#include <cstdlib>
#include <iostream>
#include <fstream>
using namespace std;
//_____________________________________________________________________________
THcRaster::THcRaster( const char* name, const char* description,
THaApparatus* apparatus ) :
THaBeamDet(name,description,apparatus)
{
fAnalyzePedestals = 0;
fNPedestalEvents = 0;
fRawXADC = 0;
fRawYADC = 0;
fXADC = 0;
fYADC = 0;
fXpos = 0;
fYpos = 0;
fFrCalMom = 0;
fFrXADCperCM = 0;
fFrXADCperCM = 0;
for(Int_t i=0;i<2;i++){
fPedADC[i] = 0;
fAvgPedADC[i] = 0;
}
}
//_____________________________________________________________________________
THcRaster::~THcRaster()
{
}
//_____________________________________________________________________________
Int_t THcRaster::ReadDatabase( const TDatime& date )
{
// Read parameters such as calibration factor, of this detector from the database.
cout << "THcRaster::ReadDatabase()" << endl;
char prefix[2];
//cout << " THcRaster::ReadDatabase GetName() called " << GetName() << endl;
// prefix[0]=tolower(GetName()[0]);
// bpw- The prefix is hardcoded so that we don't have to change the gbeam.param file. o/w to get the following variables, we need to change to parameter names to rfr_cal_mom, etc where "r" comes from prefix[0]=tolower(GetName()[0]).
prefix[0]='g';
prefix[1]='\0';
// string names;
DBRequest list[]={
{"fr_cal_mom",&fFrCalMom, kDouble},
{"frx_adcpercm",&fFrXADCperCM, kDouble},
{"fry_adcpercm",&fFrYADCperCM, kDouble},
{"pbeam",&fgpbeam, kDouble},
{0}
};
// get the calibration factors from gbeam.param file
gHcParms->LoadParmValues((DBRequest*)&list,prefix);
return kOK;
}
//_____________________________________________________________________________
Int_t THcRaster::DefineVariables( EMode mode )
{
// Initialize global variables for histogramming and tree
cout << "THcRaster::DefineVariables called " << GetName() << endl;
if( mode == kDefine && fIsSetup ) return kOK;
fIsSetup = ( mode == kDefine );
// Register variables in global list
RVarDef vars[] = {
{"frx_raw_adc", "Raster X raw ADC", "fRawXADC"},
{"fry_raw_adc", "Raster Y raw ADC", "fRawYADC"},
{"frx_adc", "Raster X ADC", "fXADC"},
{"fry_adc", "Raster Y ADC", "fYADC"},
{"frx", "Raster X position", "fXpos"},
{"fry", "Raster Y position", "fYpos"},
{ 0 }
};
return DefineVarsFromList( vars, mode );
}
//_____________________________________________________________________________
THaAnalysisObject::EStatus THcRaster::Init( const TDatime& date )
{
cout << "THcRaster::Init()" << endl;
THcHitList::InitHitList(fDetMap,"THcRasterRawHit",4);
EStatus status;
if( (status = THaBeamDet::Init( date )) )
return fStatus=status;
// Fill detector map with RASTER type channels
if( gHcDetectorMap->FillMap(fDetMap, "RASTER") < 0 ) {
static const char* const here = "Init()";
Error( Here(here), "Error filling detectormap for %s.", "RASTER");
return kInitError;
}
return fStatus = kOK;
}
//_____________________________________________________________________________
void THcRaster::AccumulatePedestals(TClonesArray* rawhits)
{
/*
Extract data from the hit list, accumulating into arrays for
calculating pedestals.
From ENGINE/g_analyze_misc.f -
* JRA: Code to check FR pedestals. Since the raster is a fixed frequency
* and the pedestals come at a fixed rate, it is possible to keep getting
* the same value for each pedestal event, and get the wrong zero value.
* (see HCLOG #28325). So calculate pedestal from first 1000 REAL
* events and compare to value from pedestal events. Error on each
* measurement is RMS/sqrt(1000), error on diff is *sqrt(2), so 3 sigma
* check is 3*sqrt(2)*RMS/sqrt(1000) = .13*RMS
!
! Can't use RMS, since taking sum of pedestal**2 for these signals
! gives rollover for integer*4. Just assume signal is +/-2000
! channels, gives sigma of 100 channels, so check for diff>130.
!
*/
Int_t nrawhits = rawhits->GetLast()+1;
Int_t ihit=0;
while(ihit<nrawhits) {
THcRasterRawHit* hit = (THcRasterRawHit *) fRawHitList->At(ihit);
if(hit->fADC_xsig>0) {
fPedADC[0] += hit->fADC_xsig;
//std::cout<<" raster x pedestal collect "<<fPedADC[0]<<std::endl;
}
if(hit->fADC_ysig>0) {
fPedADC[1] += hit->fADC_ysig;
//std::cout<<" raster y pedestal collect "<<fPedADC[1]<<std::endl;
}
ihit++;
}
}
//_____________________________________________________________________________
void THcRaster::CalculatePedestals( )
{
/*
Use the accumulated pedestal data to calculate pedestals
From ENGINE/g_analyze_misc.f -
if (numfr.eq.1000) then
avefrx = sumfrx / float(numfr)
avefry = sumfry / float(numfr)
if (abs(avefrx-gfrx_adc_ped).gt.130.) then
write(6,*) 'FRPED: peds give <frx>=',gfrx_adc_ped,
$ ' realevents give <frx>=',avefrx
endif
if (abs(avefry-gfry_adc_ped).gt.130.) then
write(6,*) 'FRPED: peds give <fry>=',gfry_adc_ped,
$ ' realevents give <fry>=',avefry
endif endif
*/
for(Int_t i=0;i<2;i++){
fAvgPedADC[i] = fPedADC[i]/ fNPedestalEvents;
// std::cout<<" raster pedestal "<<fAvgPedADC[i]<<std::endl;
}
}
//_____________________________________________________________________________
Int_t THcRaster::Decode( const THaEvData& evdata )
{
// loops over all channels defined in the detector map
// copies raw data into local variables
// performs pedestal subtraction
// Get the Hall C style hitlist (fRawHitList) for this event
Int_t fNhits = THcHitList::DecodeToHitList(evdata);
// Get the pedestals from the first 1000 events
//if(fNPedestalEvents < 10)
if((gHaCuts->Result("Pedestal_event")) & (fNPedestalEvents < 1000)){
AccumulatePedestals(fRawHitList);
fAnalyzePedestals = 1; // Analyze pedestals first normal events
fNPedestalEvents++;
return(0);
}
if(fAnalyzePedestals) {
CalculatePedestals();
fAnalyzePedestals = 0; // Don't analyze pedestals next event
}
Int_t ihit = 0;
while(ihit < fNhits) {
THcRasterRawHit* hit = (THcRasterRawHit *) fRawHitList->At(ihit);
if(hit->fADC_xsig>0) {
fRawXADC = hit->fADC_xsig;
//std::cout<<" Raw X ADC = "<<fRawXADC<<std::endl;
}
if(hit->fADC_ysig>0) {
fRawYADC = hit->fADC_ysig;
//std::cout<<" Raw Y ADC = "<<fRawYADC<<std::endl;
}
ihit++;
}
return 0;
}
//_____________________________________________________________________________
Int_t THcRaster::Process( ){
Double_t eBeam = 0.001;
/*
calculate raster position from ADC value.
From ENGINE/g_analyze_misc.f -
gfrx_adc = gfrx_raw_adc - gfrx_adc_ped gfry_adc = gfry_raw_adc - gfry_adc_ped
*/
// calculate the raster currents
fXADC = fRawXADC-fAvgPedADC[0];
fYADC = fRawYADC-fAvgPedADC[1];
//std::cout<<" Raw X ADC = "<<fXADC<<" Raw Y ADC = "<<fYADC<<std::endl;
/*
calculate the raster positions
gfrx = (gfrx_adc/gfrx_adcpercm)*(gfr_cal_mom/ebeam)
gfry = (gfry_adc/gfry_adcpercm)*(gfr_cal_mom/ebeam)
*/
if(gHcParms->Find("gpbeam")){
eBeam=*(Double_t *)gHcParms->Find("gpbeam")->GetValuePointer();
}
fXpos = (fXADC/fFrXADCperCM)*(fFrCalMom/eBeam);
fYpos = (fYADC/fFrYADCperCM)*(fFrCalMom/eBeam);
// std::cout<<" X = "<<fXpos<<" Y = "<<fYpos<<std::endl;
fDirection.SetXYZ(0.0,0.0,1.0); // Set arbitrarily to avoid run time warnings
return 0;
}
ClassImp(THcRaster)
////////////////////////////////////////////////////////////////////////////////