THcHelicityScaler Class Reference

Event handler for Hall C helicity scalers.

This event handler scans an event for a helicity scaler bank. A helicity scaler bank contains data from one or more SIS3801 scaler triggers.

THcHelcityScaler *phelscaler = new THcHelicityScaler("P","HC helicity scalers");
phelscaler->SetDebugFile("PHelScaler.txt");
phelscaler->SetROC(8);   // 5 for HMS defaults to 8 for SHMS
phelscaler->SetBankID(9801); // Will default to this
gHaEvtHandlers->Add (phelscaler);

Author

S. A. Wood (saw@j.nosp@m.lab..nosp@m.org) C. Yero (cyero.nosp@m.@jla.nosp@m.b.org)

Definition at line 26 of file THcHelicityScaler.h.

Public Member Functions
Int_t	Analyze (THaEvData *evdata)
Int_t	AnalyzeBuffer (UInt_t *rdata)
Int_t	AnalyzeHelicityScaler (UInt_t *p)
virtual Int_t	End (THaRunBase *r=0)
virtual Int_t	GetEvNum ()
virtual Int_t *	GetHelicityHistoryP ()
virtual Int_t	GetNcycles ()
virtual Int_t	GetNevents ()
virtual Int_t	GetReportedActual ()
virtual Int_t	GetReportedSeed ()
virtual EStatus	Init (const TDatime &run_time)
virtual Bool_t	IsSeedGood ()
virtual Int_t	ReadDatabase (const TDatime &date)
virtual void	SetBankID (Int_t bankid)
virtual void	SetDelayedType (int evtype)
virtual void	SetNScalerChannels (Int_t n)
virtual void	SetROC (Int_t roc)
virtual void	SetUseFirstEvent (Bool_t b=kFALSE)
	THcHelicityScaler (const char *, const char *)
virtual	~THcHelicityScaler ()

Private Member Functions
void	AddVars (TString name, TString desc, UInt_t iscal, UInt_t ichan, UInt_t ikind)
void	DefVars ()
void	MakeParms ()
THcHelicityScaler &	operator= (const THcHelicityScaler &fh)
Int_t	RanBit30 (Int_t ranseed)
	THcHelicityScaler (const THcHelicityScaler &fh)

Static Private Member Functions
static size_t	FindNoCase (const std::string &sdata, const std::string &skey)

Private Attributes
Double_t	actualHelicityR
Double_t *	dvars
Double_t *	dvarsFirst
UInt_t	evcount
Double_t	evcountR
UInt_t	evNumber
Double_t	evNumberR
Double_t *	fAsymmetry
Double_t *	fAsymmetryError
UInt_t	fBankID
Double_t	fbcm_Current_Threshold
Int_t	fbcm_Current_Threshold_Index
Double_t *	fBCM_delta_charge
Double_t *	fBCM_Gain
std::vector< std::string >	fBCM_Name
Double_t *	fBCM_Offset
Double_t *	fBCM_SatOffset
Double_t *	fBCM_SatQuadratic
Double_t *	fChargeAsymmetry
Double_t *	fChargeAsymmetryError
Double_t *	fChargeAsymSum
Double_t *	fChargeAsymSum2
Double_t *	fChargeCycle [4]
Double_t *	fChargeSum
Int_t	fClockChan
Double_t	fClockFreq
std::vector< UInt_t * >	fDelayedEvents
Int_t	fDelayedType
Double_t	fDeltaTime
Int_t	fFirstCycle
Int_t	fGateCount [2]
Bool_t	fHaveCycle [4]
Int_t	fHelicityHistory [200]
Double_t *	fHScalers [2]
UInt_t	fLastClock
std::set< UInt_t >	fModuleSet
Int_t	fNBits
Int_t	fNormIdx
Int_t	fNormSlot
Int_t	fNScalerChannels
Int_t	fNTriggers
Int_t	fNTriggersMinus
Int_t	fNTriggersPlus
Int_t	fNTrigsInBuf
Int_t	fNumBCMs
Bool_t	fOnlyBanks
Bool_t	fOnlySyncEvents
Double_t	fPrevTotalTime
Int_t	fQuartetCount
Int_t	fRingSeed_actual
Int_t	fRingSeed_reported
Int_t	fROC
std::set< UInt_t >	fRocSet
Double_t *	fScalAsymmetry
Double_t *	fScalAsymmetryError
Double_t *	fScalAsymSum
Double_t *	fScalAsymSum2
Double_t *	fScalCycle [4]
Double_t *	fScalerChan
Double_t *	fScalerSums
TTree *	fScalerTree
Double_t *	fScalSum
Double_t	fTimeAsymmetry
Double_t	fTimeAsymmetryError
Double_t	fTimeAsymSum
Double_t	fTimeAsymSum2
Double_t	fTimeCycle [4]
Double_t	fTimeMinus
Double_t	fTimePlus
Double_t	fTimeSum
Double_t	fTotalTime
Double_t	fTriggerAsymmetry
Bool_t	fUseFirstEvent
Int_t	ifound
Int_t	nscalers
Int_t	Nvars
Double_t	quartetphaseR
std::vector< HCScalerLoc * >	scalerloc
std::vector< Decoder::GenScaler * >	scalers

#include <THcHelicityScaler.h>

Inheritance diagram for THcHelicityScaler:

Constructor & Destructor Documentation

THcHelicityScaler::THcHelicityScaler	(	const char *	name,
		const char *	description
	)

Definition at line 59 of file THcHelicityScaler.cxx.

THcHelicityScaler::~THcHelicityScaler ( )

virtual

Definition at line 90 of file THcHelicityScaler.cxx.

THcHelicityScaler::THcHelicityScaler ( const THcHelicityScaler &  fh )

private

Member Function Documentation

void THcHelicityScaler::AddVars ( TString  name, TString  desc, UInt_t  iscal, UInt_t  ichan, UInt_t  ikind  )

private

Definition at line 1429 of file THcHelicityScaler.cxx.

Int_t THcHelicityScaler::Analyze

(

THaEvData *

evdata

)

Create the ROOT tree and pass events to AnalyzeBuffer

If the event is of the type fDelayedType, cache the event buffer and analyze it in End.

Definition at line 324 of file THcHelicityScaler.cxx.

Int_t THcHelicityScaler::AnalyzeBuffer

(

UInt_t *

rdata

)

Scan for and analyze helicity scaler banks in an event

A helicity bank can contain more than one event/trigger, particularly if the event trigger rate is lower than the helicity flip rate.

Definition at line 424 of file THcHelicityScaler.cxx.

Int_t THcHelicityScaler::AnalyzeHelicityScaler

(

UInt_t *

p

)

Analyze a single SIS3801 helicity scaler event/trigger

An event contains 32 scalers that were accumulated over the last helicity window. The event also contains 2 bits, one being the reported helicity for this window and the other a marker for the quartet. This method determines actual helicity from the delayed helicity bits and accumulates scalers for each helicity state.

This code assumes that the helity is delivered in quartets of windows with the pattern +–+ or -++- and that the helicity that is reported has been delayed by 8 windows (2 quartets.)

For the first 120 events, the actual helicity of each helicity scaler event can not be determined. This actualy helicity of each event can be determined once the 30 bit seed for the helicity generator has been determined. At the start of each quartet, the reported helicity is pushed onto the seed. Once 30 bits have been pushed onto the seed, the actual helicity of any given event can be determined.

The SIS3801 has a bug (undocumented feature?) with the inputs bits. The value of the bits are delayed by one trigger, so they do not corresponed to the the scaler values read in the event. This bug was not known (to the author) at the time that this method was written, so there is a hack (marked by the DELAY9 ifdef) to account for this. Some rewriting of the code probably make things clearer.

Definition at line 534 of file THcHelicityScaler.cxx.

void THcHelicityScaler::DefVars ( )

private

Definition at line 1442 of file THcHelicityScaler.cxx.

Int_t THcHelicityScaler::End ( THaRunBase *  r = 0 )

virtual

Definition at line 112 of file THcHelicityScaler.cxx.

size_t THcHelicityScaler::FindNoCase ( const std::string &  sdata, const std::string &  skey  )

staticprivate

Definition at line 1466 of file THcHelicityScaler.cxx.

virtual Int_t THcHelicityScaler::GetEvNum ( )

inlinevirtual

Definition at line 48 of file THcHelicityScaler.h.

virtual Int_t* THcHelicityScaler::GetHelicityHistoryP ( )

inlinevirtual

Definition at line 49 of file THcHelicityScaler.h.

virtual Int_t THcHelicityScaler::GetNcycles ( )

inlinevirtual

Definition at line 47 of file THcHelicityScaler.h.

virtual Int_t THcHelicityScaler::GetNevents ( )

inlinevirtual

Definition at line 46 of file THcHelicityScaler.h.

virtual Int_t THcHelicityScaler::GetReportedActual ( )

inlinevirtual

Definition at line 51 of file THcHelicityScaler.h.

virtual Int_t THcHelicityScaler::GetReportedSeed ( )

inlinevirtual

Definition at line 50 of file THcHelicityScaler.h.

THaAnalysisObject::EStatus THcHelicityScaler::Init ( const TDatime &  run_time )

virtual

Definition at line 1093 of file THcHelicityScaler.cxx.

virtual Bool_t THcHelicityScaler::IsSeedGood ( )

inlinevirtual

Definition at line 52 of file THcHelicityScaler.h.

void THcHelicityScaler::MakeParms ( )

private

Definition at line 1360 of file THcHelicityScaler.cxx.

THcHelicityScaler& THcHelicityScaler::operator= ( const THcHelicityScaler &  fh )

private

Int_t THcHelicityScaler::RanBit30 ( Int_t  ranseed )

private

Generate a new helicity state bit using same algorithm as the injector

Definition at line 1074 of file THcHelicityScaler.cxx.

Int_t THcHelicityScaler::ReadDatabase ( const TDatime &  date )

virtual

Definition at line 259 of file THcHelicityScaler.cxx.

virtual void THcHelicityScaler::SetBankID ( Int_t  bankid )

inlinevirtual

Definition at line 44 of file THcHelicityScaler.h.

void THcHelicityScaler::SetDelayedType ( int  evtype )

virtual

Delay analysis of this event type to end.

Final scaler events generated in readout list end routines may not come in order in the data stream. If the event type of a end routine scaler event is set, then the event contents will be saved and analyzed at the end of the analysis so that time ordering of scaler events is preserved.

Definition at line 311 of file THcHelicityScaler.cxx.

virtual void THcHelicityScaler::SetNScalerChannels ( Int_t  n )

inlinevirtual

Definition at line 45 of file THcHelicityScaler.h.

virtual void THcHelicityScaler::SetROC ( Int_t  roc )

inlinevirtual

Definition at line 43 of file THcHelicityScaler.h.

virtual void THcHelicityScaler::SetUseFirstEvent ( Bool_t  b = kFALSE )

inlinevirtual

Definition at line 41 of file THcHelicityScaler.h.

Member Data Documentation

Double_t THcHelicityScaler::actualHelicityR

private

Definition at line 161 of file THcHelicityScaler.h.

Double_t* THcHelicityScaler::dvars

private

Definition at line 164 of file THcHelicityScaler.h.

Double_t* THcHelicityScaler::dvarsFirst

private

Definition at line 165 of file THcHelicityScaler.h.

UInt_t THcHelicityScaler::evcount

private

Definition at line 157 of file THcHelicityScaler.h.

Double_t THcHelicityScaler::evcountR

private

Definition at line 158 of file THcHelicityScaler.h.

UInt_t THcHelicityScaler::evNumber

private

Definition at line 159 of file THcHelicityScaler.h.

Double_t THcHelicityScaler::evNumberR

private

Definition at line 160 of file THcHelicityScaler.h.

Double_t* THcHelicityScaler::fAsymmetry

private

Definition at line 87 of file THcHelicityScaler.h.

Double_t* THcHelicityScaler::fAsymmetryError

private

Definition at line 88 of file THcHelicityScaler.h.

UInt_t THcHelicityScaler::fBankID

private

Definition at line 68 of file THcHelicityScaler.h.

Double_t THcHelicityScaler::fbcm_Current_Threshold

private

Definition at line 150 of file THcHelicityScaler.h.

Int_t THcHelicityScaler::fbcm_Current_Threshold_Index

private

Definition at line 152 of file THcHelicityScaler.h.

Double_t* THcHelicityScaler::fBCM_delta_charge

private

Definition at line 146 of file THcHelicityScaler.h.

Double_t* THcHelicityScaler::fBCM_Gain

private

Definition at line 141 of file THcHelicityScaler.h.

std::vector<std::string> THcHelicityScaler::fBCM_Name

private

Definition at line 153 of file THcHelicityScaler.h.

Double_t* THcHelicityScaler::fBCM_Offset

private

Definition at line 142 of file THcHelicityScaler.h.

Double_t* THcHelicityScaler::fBCM_SatOffset

private

Definition at line 144 of file THcHelicityScaler.h.

Double_t* THcHelicityScaler::fBCM_SatQuadratic

private

Definition at line 145 of file THcHelicityScaler.h.

Double_t* THcHelicityScaler::fChargeAsymmetry

private

Definition at line 121 of file THcHelicityScaler.h.

Double_t* THcHelicityScaler::fChargeAsymmetryError

private

Definition at line 122 of file THcHelicityScaler.h.

Double_t* THcHelicityScaler::fChargeAsymSum

private

Definition at line 123 of file THcHelicityScaler.h.

Double_t* THcHelicityScaler::fChargeAsymSum2

private

Definition at line 124 of file THcHelicityScaler.h.

Double_t* THcHelicityScaler::fChargeCycle[4]

private

Definition at line 119 of file THcHelicityScaler.h.

Double_t* THcHelicityScaler::fChargeSum

private

Definition at line 120 of file THcHelicityScaler.h.

Int_t THcHelicityScaler::fClockChan

private

Definition at line 169 of file THcHelicityScaler.h.

Double_t THcHelicityScaler::fClockFreq

private

Definition at line 151 of file THcHelicityScaler.h.

std::vector<UInt_t*> THcHelicityScaler::fDelayedEvents

private

Definition at line 136 of file THcHelicityScaler.h.

Int_t THcHelicityScaler::fDelayedType

private

Definition at line 76 of file THcHelicityScaler.h.

Double_t THcHelicityScaler::fDeltaTime

private

Definition at line 148 of file THcHelicityScaler.h.

Int_t THcHelicityScaler::fFirstCycle

private

Definition at line 72 of file THcHelicityScaler.h.

Int_t THcHelicityScaler::fGateCount[2]

private

Definition at line 85 of file THcHelicityScaler.h.

Bool_t THcHelicityScaler::fHaveCycle[4]

private

Definition at line 98 of file THcHelicityScaler.h.

Int_t THcHelicityScaler::fHelicityHistory[200]

private

Definition at line 73 of file THcHelicityScaler.h.

Double_t* THcHelicityScaler::fHScalers[2]

private

Definition at line 84 of file THcHelicityScaler.h.

UInt_t THcHelicityScaler::fLastClock

private

Definition at line 170 of file THcHelicityScaler.h.

std::set<UInt_t> THcHelicityScaler::fModuleSet

private

Definition at line 172 of file THcHelicityScaler.h.

Int_t THcHelicityScaler::fNBits

private

Definition at line 80 of file THcHelicityScaler.h.

Int_t THcHelicityScaler::fNormIdx

private

Definition at line 163 of file THcHelicityScaler.h.

Int_t THcHelicityScaler::fNormSlot

private

Definition at line 163 of file THcHelicityScaler.h.

Int_t THcHelicityScaler::fNScalerChannels

private

Definition at line 138 of file THcHelicityScaler.h.

Int_t THcHelicityScaler::fNTriggers

private

Definition at line 71 of file THcHelicityScaler.h.

Int_t THcHelicityScaler::fNTriggersMinus

private

Definition at line 83 of file THcHelicityScaler.h.

Int_t THcHelicityScaler::fNTriggersPlus

private

Definition at line 82 of file THcHelicityScaler.h.

Int_t THcHelicityScaler::fNTrigsInBuf

private

Definition at line 70 of file THcHelicityScaler.h.

Int_t THcHelicityScaler::fNumBCMs

private

Definition at line 140 of file THcHelicityScaler.h.

Bool_t THcHelicityScaler::fOnlyBanks

private

Definition at line 168 of file THcHelicityScaler.h.

Bool_t THcHelicityScaler::fOnlySyncEvents

private

Definition at line 167 of file THcHelicityScaler.h.

Double_t THcHelicityScaler::fPrevTotalTime

private

Definition at line 149 of file THcHelicityScaler.h.

Int_t THcHelicityScaler::fQuartetCount

private

Definition at line 100 of file THcHelicityScaler.h.

Int_t THcHelicityScaler::fRingSeed_actual

private

Definition at line 79 of file THcHelicityScaler.h.

Int_t THcHelicityScaler::fRingSeed_reported

private

Definition at line 78 of file THcHelicityScaler.h.

Int_t THcHelicityScaler::fROC

private

Definition at line 137 of file THcHelicityScaler.h.

std::set<UInt_t> THcHelicityScaler::fRocSet

private

Definition at line 171 of file THcHelicityScaler.h.

Double_t* THcHelicityScaler::fScalAsymmetry

private

Definition at line 113 of file THcHelicityScaler.h.

Double_t* THcHelicityScaler::fScalAsymmetryError

private

Definition at line 114 of file THcHelicityScaler.h.

Double_t* THcHelicityScaler::fScalAsymSum

private

Definition at line 115 of file THcHelicityScaler.h.

Double_t* THcHelicityScaler::fScalAsymSum2

private

Definition at line 116 of file THcHelicityScaler.h.

Double_t* THcHelicityScaler::fScalCycle[4]

private

Definition at line 111 of file THcHelicityScaler.h.

Double_t* THcHelicityScaler::fScalerChan

private

Definition at line 134 of file THcHelicityScaler.h.

Double_t* THcHelicityScaler::fScalerSums

private

Definition at line 86 of file THcHelicityScaler.h.

TTree* THcHelicityScaler::fScalerTree

private

Definition at line 166 of file THcHelicityScaler.h.

Double_t* THcHelicityScaler::fScalSum

private

Definition at line 112 of file THcHelicityScaler.h.

Double_t THcHelicityScaler::fTimeAsymmetry

private

Definition at line 105 of file THcHelicityScaler.h.

Double_t THcHelicityScaler::fTimeAsymmetryError

private

Definition at line 106 of file THcHelicityScaler.h.

Double_t THcHelicityScaler::fTimeAsymSum

private

Definition at line 107 of file THcHelicityScaler.h.

Double_t THcHelicityScaler::fTimeAsymSum2

private

Definition at line 108 of file THcHelicityScaler.h.

Double_t THcHelicityScaler::fTimeCycle[4]

private

Definition at line 103 of file THcHelicityScaler.h.

Double_t THcHelicityScaler::fTimeMinus

private

Definition at line 92 of file THcHelicityScaler.h.

Double_t THcHelicityScaler::fTimePlus

private

Definition at line 91 of file THcHelicityScaler.h.

Double_t THcHelicityScaler::fTimeSum

private

Definition at line 104 of file THcHelicityScaler.h.

Double_t THcHelicityScaler::fTotalTime

private

Definition at line 147 of file THcHelicityScaler.h.

Double_t THcHelicityScaler::fTriggerAsymmetry

private

Definition at line 95 of file THcHelicityScaler.h.

Bool_t THcHelicityScaler::fUseFirstEvent

private

Definition at line 75 of file THcHelicityScaler.h.

Int_t THcHelicityScaler::ifound

private

Definition at line 163 of file THcHelicityScaler.h.

Int_t THcHelicityScaler::nscalers

private

Definition at line 163 of file THcHelicityScaler.h.

Int_t THcHelicityScaler::Nvars

private

Definition at line 163 of file THcHelicityScaler.h.

Double_t THcHelicityScaler::quartetphaseR

private

Definition at line 162 of file THcHelicityScaler.h.

std::vector<HCScalerLoc*> THcHelicityScaler::scalerloc

private

Definition at line 62 of file THcHelicityScaler.h.

std::vector<Decoder::GenScaler*> THcHelicityScaler::scalers

private

Definition at line 61 of file THcHelicityScaler.h.

Collaboration diagram for THcHelicityScaler:

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The documentation for this class was generated from the following files:

• /Users/saw/ROOT/hcana/src/THcHelicityScaler.h
• /Users/saw/ROOT/hcana/src/THcHelicityScaler.cxx