#ifndef AliRICHParam_h
#define AliRICHParam_h
-#include "AliRICHConst.h"
-#include <TObject.h>
-#include <TMath.h>
+#include <TNamed.h> //base class
+#include <TMath.h> //QdcTot()
+#include <TVector.h> //old style
+#include <TVector2.h>
#include <TVector3.h>
+#include <Riostream.h> //---------to be deleted-------------
#include <TRandom.h>
+#include <TClonesArray.h> //Hit2SDigs()
+#include <AliLog.h>
+#include <TGeoMatrix.h> //Mars2Lors() Lors2Mars()
+#include <TF1.h> //fields
+#include <TF2.h> //fields
+#include "AliRICHDigit.h" //Hit2Sdigs()
+#include <TGeoManager.h> //Instance()
-class AliRICHParam :public TObject
+static const int kNchambers=7; //number of RICH chambers
+static const int kNpadsX = 160; //number of pads along X in single chamber
+static const int kNpadsY = 144; //number of pads along Y in single chamber
+static const int kNsectors=6; //number of sectors per chamber
+
+static const int kCerenkov=50000050; //??? go to something more general like TPDGCode
+static const int kFeedback=50000051; //??? go to something more general like TPDGCode
+
+// Class providing all the needed parametrised information
+// to construct the geometry, to define segmentation and to provide response model
+// In future will also provide all the staff needed for alignment and calibration
+
+
+class AliRICHParam :public TNamed
{
public:
- AliRICHParam() {;}
- virtual ~AliRICHParam() {;}
- static const Int_t NpadsX() {return kNpadsX;}
- static const Int_t NpadsY() {return kNpadsY;}
- static Int_t NpadsXsec() {return NpadsX()/3;}
- static Int_t NpadsYsec() {return NpadsY()/2;}
- static Double_t DeadZone() {return 2.6;}
- static Double_t PadSizeX() {return 0.84;}
- static Double_t PadSizeY() {return 0.8;}
- static Double_t SectorSizeX() {return NpadsX()*PadSizeX()/3;}
- static Double_t SectorSizeY() {return NpadsY()*PadSizeY()/2;}
- static Double_t PcSizeX() {return NpadsX()*PadSizeX()+2*DeadZone();}
- static Double_t PcSizeY() {return NpadsY()*PadSizeY()+DeadZone();}
- static Double_t WirePitch() {return PadSizeX()/2;}
- static Double_t SizeX() {return 132.6;}
- static Double_t SizeY() {return 26;}
- static Double_t SizeZ() {return 136.7;}
- static Double_t Offset() {return 490+1.267;}
- static Double_t AngleYZ() {return 19.5*TMath::DegToRad();}
- static Double_t AngleXY() {return 20*TMath::DegToRad();}
- static Double_t FreonThickness() {return 1.5;}
- static Double_t QuartzThickness() {return 0.5;}
- static Double_t GapThickness() {return 8.0;}
- static Double_t RadiatorToPads() {return FreonThickness()+QuartzThickness()+GapThickness();}
- static Double_t ProximityGapThickness() {return 0.4;}
- static Double_t AnodeCathodeGap() {return 0.2;}
- static Double_t QuartzLength() {return 133;}
- static Double_t QuartzWidth() {return 127.9;}
- static Double_t OuterFreonLength() {return 133;}
- static Double_t OuterFreonWidth() {return 41.3;}
- static Double_t InnerFreonLength() {return 133;}
- static Double_t InnerFreonWidth() {return 41.3;}
- static Double_t IonisationPotential() {return 26.0e-9;}
- static Double_t MathiesonDeltaX() {return 5*0.18;}
- static Double_t MathiesonDeltaY() {return 5*0.18;}
- static Int_t MaxQdc() {return 4095;}
- static Double_t QdcSlope(Int_t sec) {HV(sec);return 27;}
- static Double_t AlphaFeedback(Int_t sec) {HV(sec);return 0.036;}
-
- static Bool_t IsResolveClusters() {return fgIsResolveClusters;}
- static Bool_t IsWireSag() {return fgIsWireSag;}
- static Int_t HV(Int_t) {return fgHV;}
- static Double_t AngleRot() {return fgAngleRot*TMath::DegToRad();}
- static void SetResolveClusters(Bool_t a){fgIsResolveClusters=a;}
- static void SetWireSag(Bool_t status) {fgIsWireSag=status;}
- static void SetHV(Int_t hv) {fgHV =hv;}
- static void SetAngleRot(Double_t rot) {fgAngleRot =rot;}
-
- inline static Double_t Mathieson(Double_t lx1,Double_t lx2,Double_t ly1,Double_t ly2);
- inline static void Loc2Area(TVector3 hitX3,Int_t &padxMin,Int_t &padyMin,Int_t &padxMax,Int_t &padyMax);
- inline static Int_t PadNeighbours(Int_t iPadX,Int_t iPadY,Int_t aListX[4],Int_t aListY[4]);
- inline static Int_t Loc2Pad(Double_t x,Double_t y,Int_t &padx,Int_t &pady);
- inline static void Pad2Loc(Int_t padx,Int_t pady,Double_t &x,Double_t &y);
- inline static Double_t GainVariation(Double_t y,Int_t sector);
- inline static Int_t Loc2TotQdc(TVector3 locX3,Double_t eloss,Int_t iPid, Int_t §or);
- inline static Double_t Loc2PadFrac(TVector3 locX3,Int_t padx,Int_t pady);
-
- inline static Int_t Loc2Sec(Double_t &x,Double_t &y);
- inline static Int_t Pad2Sec(Int_t &padx,Int_t &pady);
- inline Bool_t IsOverTh(Int_t iChamber, Int_t x, Int_t y, Double_t q);
- static Int_t NsigmaTh() {return fgNsigmaTh;}
- static Float_t SigmaThMean() {return fgSigmaThMean;}
- static Float_t SigmaThSpread() {return fgSigmaThSpread;}
- void GenSigmaThMap();
+//ctor&dtor
+ virtual ~AliRICHParam() {delete fIdxC6F14;fgInstance=0;}
+//test methodes
+ void Print(Option_t *opt="") const; //print current parametrization
+ static void DrawAxis();
+ static void DrawSectors();
+//flags staff
+ static inline AliRICHParam* Instance(); //pointer to AliRICHParam singleton
+ static Int_t Stack(Int_t evt=-1,Int_t tid=-1); //Print stack info for event and tid
+ static Int_t StackCount(Int_t pid,Int_t evt); //Counts stack particles of given sort in given event
+ static inline Double_t ErrLoc (Double_t thetaC,Double_t phiC,Double_t thetaT,Double_t phiT,Double_t beta);
+ static inline Double_t ErrGeom (Double_t thetaC,Double_t phiC,Double_t thetaT,Double_t phiT,Double_t beta);
+ static inline Double_t ErrCrom (Double_t thetaC,Double_t phiC,Double_t thetaT,Double_t phiT,Double_t beta);
+ static inline Double_t SigmaSinglePhotonFormula(Double_t thetaC,Double_t phiC,Double_t thetaT,Double_t phiT,Double_t beta);
+//Geometrical properties
+ static Int_t NpadsX () {return kNpadsX;} //number of pads along X in chamber
+ static Int_t NpadsY () {return kNpadsY;} //number of pads along Y in chamber
+ static Int_t NpadsXsec () {return NpadsX()/2;} //number of pads along X in sector
+ static Int_t NpadsYsec () {return NpadsY()/3;} //number of pads along Y in sector
+
+ static Double_t AnodPitch () {return PadSizeY()/2;} //cm between anode wires
+ static Double_t AnodZ () {return 7.806;} //Z positon of anod plane in LORS of the chamber, [cm]
+ static Double_t CathPitch () {return PadSizeY()/4;} //dist between cathode wires [cm]
+ static Double_t CollPitch () {return 0.5;} //dist between collection wires [cm]
+ static Double_t DeadZone () {return 2.6;} //dead zone thickness [cm]
+ static Double_t PadSizeX () {return 0.8;} //pad size x [cm]
+ static Double_t PadSizeY () {return 0.84;} //pad size y [cm]
+ static Double_t PcSizeX () {return NpadsX()*PadSizeX()+DeadZone();} //PC size x [cm]
+ static Double_t PcSizeY () {return NpadsY()*PadSizeY()+2*DeadZone();} //PC size y [cm]
+ static Double_t Pc2Cath () {return 0.445;} //dist between PC entrance plane and cathode wires plane [cm]
+ static Double_t Pc2Win () {return PcZ();} //dist between PC entrance plane and window exit plane [cm]
+ static Double_t PcZ () {return 8.0; } //Z positon of PC entrance plane in LORS of the chamber [cm]
+ static Double_t RadThick () {return 1.5;} //radiator thickness [cm]
+ static Double_t RadZ () {return -2.0; } //Z positon of radiator entrance plane in LORS of the chamber [cm]
+ static Double_t SecSizeX () {return NpadsX()*PadSizeX()/2;} //sector size x [cm]
+ static Double_t SecSizeY () {return NpadsY()*PadSizeY()/3;} //sector size y [cm ]
+ static Double_t WinThick () {return 0.5;} //radiator window thickness [cm]
+
+
+//trasformation methodes
+ inline TVector3 Lors2Mars (Int_t c,Double_t x,Double_t y,Int_t p=kPc); //LORS->MARS transform of point [cm] for chamber c and plane p
+ inline TVector3 Lors2MarsVec (Int_t c,const TVector3 &p ); //LORS->MARS transform of vector for chamber c
+ inline TVector2 Mars2Lors (Int_t c,const TVector3 &x ,Int_t p=kPc); //MARS->LORS transform of point [cm] for chamber c and plane p
+ inline TVector3 Mars2LorsVec (Int_t c,const TVector3 &p ); //MARS->LORS transform of vector for chamber c
+
+ static inline TVector3 Lors2MarsOld (Int_t c,Double_t x,Double_t y,Int_t p); //LORS->MARS transform of position (cm) for chamber c and plane p
+ static inline TVector2 Mars2LorsOld (Int_t c,const TVector3 &x,Int_t p ); //MARS->LORS transform of position (cm) for chamber c and plane p
+ static inline TVector3 Center (Int_t c,Int_t p ); //Center of plane p of chamber c in MARS (cm)
+ static inline TVector3 Norm (Int_t c ); //Norm vector to the chamber c in MARS (cm)
+ static inline TGeoMatrix*Matrix (Int_t iCh, Int_t iPlane ); //TGeoMatrix for the given chamber plain
+
+ static Int_t Pad2Cha (Int_t pad ){return pad/100000000; }//abs pad -> chamber
+ static Int_t Pad2Sec (Int_t pad ){return pad%100000000/1000000; }//abs pad -> sector
+ static Int_t Pad2PadX (Int_t pad ){return pad%1000000/1000; }//abs pad -> pad x
+ static Int_t Pad2PadY (Int_t pad ){return pad%1000000%100; }//abs pad -> pad y
+ static Int_t PadAbs (Int_t c,Int_t s,Int_t x,Int_t y){return 100000000*c+1000000*s+1000*x+y; }//(c,s,x,y) -> abs pad
+ static inline TVector2 Pad2Loc (Int_t pad ); //abs pad ->LORS
+ static inline TVector2 Pad2Loc (TVector pad ); //pad -> LORS returns center of the pad
+ static TVector2 Pad2Loc (Int_t x,Int_t y ){TVector pad(2);pad[0]=x;pad[1]=y;return Pad2Loc(pad);}//return center of the pad (x,y)
+ static inline TVector Loc2Area (const TVector2 &x2 ); //pads area affected by hit x2. area is LeftDown-RightUp pad numbers
+ static inline Int_t Loc2Sec (const TVector2 &x2 ); //LORS -> sector
+ static Int_t Loc2Sec (Double_t x,Double_t y ){return Loc2Sec(TVector2(x,y));} //LORS -> sector
+ static inline TVector Loc2Pad (const TVector2 &x2 ); //LORS -> pad
+ static TVector Loc2Pad (Double_t x,Double_t y ){return Loc2Pad(TVector2(x,y));} //LORS -> pad
+ static inline Int_t Pad2Sec (const TVector &pad ); //pad -> sector
+ static inline Int_t PadNeighbours (Int_t iPadX,Int_t iPadY,Int_t aListX[4],Int_t aListY[4]); //pad -> list of it neighbours
+ static Bool_t IsAccepted (const TVector2 &x2 ){return ( x2.X()>=0 && x2.X()<=PcSizeX() && x2.Y()>=0 && x2.Y()<=PcSizeY() ) ? kTRUE:kFALSE;}
+//optical properties methodes
+ static Float_t EckovMean ( ){return 6.766e-9;} //mean Ckov energy according to the total trasmission curve
+ static Float_t EckovMin ( ){return 5.5e-9;} //min photon energy [GeV] defined in optical curves
+ static Float_t EckovMax ( ){return 8.5e-9;} //min photon energy [GeV] defined in optical curves
+
+ Float_t IdxC6F14 (Float_t gev ){return fIdxC6F14->Eval(gev,fIdxC6F14->GetUniqueID());} //n=f(Eckov) [GeV] for C6H14 used as radiator
+ static Float_t IdxSiO2 (Float_t gev ){return TMath::Sqrt(1+46.411/(10.666*10.666-gev*gev*1e18)+228.71/(18.125*18.125-gev*gev*1e18));} //n=f(Eckov) [GeV] for SiO2 used as window TDR p.35
+ static Float_t IdxCH4 (Float_t gev ){return 1+0.12489e-6/(2.62e-4 - TMath::Power(1239.84e-9/gev,-2));} //n=f(Eckov) [GeV] for CF4
+ static Float_t AbsCH4 (Float_t gev ); //abs len=f(Eckov) [GeV] for CF4
+
+ void CdbRead (Int_t run,Int_t version ); //read all calibration information for requested run
+
+ static Double_t IonisationPotential() {return 26.0e-9;} //for CH4 in GeV taken from ????
+ static TVector2 MathiesonDelta() {return TVector2(5*0.18,5*0.18);} //area of 5 sigmas of Mathieson distribution (cm)
+ static Int_t MaxQdc() {return 4095;} //QDC number of channels
+
+
+ static Int_t QthMIP() {return 100;}
+ static Double_t DmatchMIP() {return 1.;}
+ static Double_t PmodMax() {return 6.5;}
+ static Int_t HV(Int_t sector) {if (sector>=1 && sector <=6) return 2050; else return -1;} //high voltage for this sector
+//charge response methodes
+ inline static Double_t Mathieson(Double_t x1,Double_t x2,Double_t y1,Double_t y2); //Mathienson integral over given limits
+
+ inline static Double_t GainSag(Double_t x,Int_t sector); //gain variations in %
+ static Double_t Gain(const TVector2 &x2,Bool_t isSag=kTRUE){//gives chamber gain in terms of QDC channels for given point in local ref system
+ if(isSag) return QdcSlope(Loc2Sec(x2))*(1+GainSag(x2.X(),Loc2Sec(x2))/100);
+ else return QdcSlope(Loc2Sec(x2));}
+ inline static Double_t FracQdc(const TVector2 &x2,const TVector &pad); //charge fraction to pad from hit
+ inline static Int_t TotQdc(TVector2 x2,Double_t e ); //total charge for Eloss (GeV) 0 for photons
+ static Double_t QdcSlope(Int_t sec){switch(sec){case -1: return 0; default: return 33;}} //weight of electon in QDC channels
+
+ static inline Int_t Lors2Pad (Double_t x,Double_t y ); //LORS (x,y) [cm] -> abs pad number
+ static Double_t IonPot ( ){return 26.0e-9;} //for CH4 in GeV taken from ????
+ static inline Int_t QdcTot (Int_t iPad,Double_t e ); //total QDC generated by Eloss or Etot [GeV]
+ static inline Double_t QdcSag (Int_t iPad ); //mean QDC variation due to sagita [0,1]
+ static Double_t QdcEle (Int_t iPad,Bool_t isSag=kTRUE ){return isSag?33*(1+QdcSag(iPad)):33;} //mean QDC per electron
+ static inline Int_t Hit2SDigs (Int_t iPad, Double_t e,TClonesArray* pSDigLst); //hit->sdigits, returns Qtot
+ static inline Int_t Hit2SDigs (TVector2 hit,Double_t e,TClonesArray* pSDigLst); //hit->sdigits, returns Qtot, old style
+ static void TestHit2SDigs (Double_t x,Double_t y,Double_t e,Bool_t isNew=kFALSE); //test hit->sdigits
+
+ inline static Bool_t IsOverTh(Int_t c,TVector pad,Double_t q); //is QDC of the pad registered by FEE
+ static Int_t NsigmaTh() {return 4;} //
+ static Float_t SigmaThMean() {return 1.132;} //QDC electronic noise mean
+ static Float_t SigmaThSpread() {return 0.035;} //QDC electronic noise width
+
+ static Double_t CogCorr(Double_t x) {return 3.31267e-2*TMath::Sin(2*TMath::Pi()/PadSizeX()*x) //correction of cluster CoG due to sinoidal
+ -2.66575e-3*TMath::Sin(4*TMath::Pi()/PadSizeX()*x)
+ +2.80553e-3*TMath::Sin(6*TMath::Pi()/PadSizeX()*x)+0.0070;}
+
+ TVector3 ForwardTracing(TVector3 entranceTrackPoint,TVector3 vectorTrack, Double_t thetaC, Double_t phiC); //it traces foward a photon from Emission Point to PC
+ static TVector3 PlaneIntersect(const TVector3 &lineDir,const TVector3 &linePoint,const TVector3 &planeNorm,const TVector3 &planePoint); //intersection between line and plane
+ static Double_t SnellAngle(Float_t n1, Float_t n2, Float_t theta1); // Snell law
+ static void AnglesInDRS(Double_t trackTheta,Double_t trackPhi,Double_t thetaCerenkov,Double_t phiCerenkov,Double_t &tout,Double_t &pout);//It finds photon angles in
+ static Double_t AlphaFeedback(Int_t c,Int_t s) {c++;s++; return 0.02;} //for sector s of chamber c
+//test part
+ static void Test() {TestSeg();TestTrans();TestResp();} //test all groups of methodes
+ static void TestResp(); //test the response group of methodes
+ static void TestSeg(); //test the segmentation group of methodes
+ static void TestTrans(); //test the transform group of methodes
+
+ enum EPlaneId {kCenter,kPc,kRad,kAnod,kNch=7}; //4 planes in chamber and total number of chambers
protected:
- static Bool_t fgIsWireSag; //is wire sagitta taken into account
- static Bool_t fgIsResolveClusters; //performs declustering or not
- static Int_t fgHV; //HV applied to anod wires
- static Double_t fgAngleRot; //rotation of RICH from up postion (0,0,490)cm
- Float_t fSigmaThMap[kNCH][kNpadsX][kNpadsY]; // sigma of the pedestal distributions for all pads
- static Int_t fgNsigmaTh; // n. of sigmas to cut for zero suppression
- static Float_t fgSigmaThMean; // sigma threshold value
- static Float_t fgSigmaThSpread; // spread of sigma
- ClassDef(AliRICHParam,4) //RICH main parameters
+ AliRICHParam(); //default ctor is protected to enforce it to be singleton
+ static AliRICHParam *fgInstance; //static pointer to instance of AliRICHParam singleton
+ TF2 *fIdxC6F14; //n=f(Ephot,T) [GeV] for radiator freon C6F14
+ TGeoHMatrix *fMatrix[kNchambers]; //poiners to matrices defining RICH chambers rotations-translations
+ ClassDef(AliRICHParam,0) //RICH main parameters class
};
+
+AliRICHParam* AliRICHParam::Instance()
+{
+// Return pointer to the AliRICHParam singleton.
+// Arguments: none
+// Returns: pointer to the instance of AliRICHParam or 0 if no geometry
+ if(!fgInstance&&gGeoManager) new AliRICHParam;
+ else if(!gGeoManager) Printf("No geometry imported");
+ return fgInstance;
+}//Instance()
//__________________________________________________________________________________________________
Int_t AliRICHParam::PadNeighbours(Int_t iPadX,Int_t iPadY,Int_t listX[4],Int_t listY[4])
{
+//Determines all the neighbouring pads for the given one (iPadX,iPadY). Returns total number of these pads.
+//Dead zones are taken into account, meaning pads from different sector are not taken.
+// 1
+// 2 3
+// 4
Int_t nPads=0;
- if(iPadY<NpadsY()){listX[nPads]=iPadX; listY[nPads]=iPadY+1; nPads++;}
- if(iPadX<NpadsX()){listX[nPads]=iPadX+1; listY[nPads]=iPadY; nPads++;}
- if(iPadY>1) {listX[nPads]=iPadX; listY[nPads]=iPadY-1; nPads++;}
- if(iPadX>1) {listX[nPads]=iPadX-1; listY[nPads]=iPadY; nPads++;}
+ if(iPadY!=NpadsY()&&iPadY!=2*NpadsYsec()&&iPadY!=NpadsYsec()){listX[nPads]=iPadX; listY[nPads]=iPadY+1; nPads++;} //1
+ if(iPadX!=1&&iPadX!=NpadsXsec()+1) {listX[nPads]=iPadX-1; listY[nPads]=iPadY; nPads++;} //2
+ if(iPadX!=NpadsXsec()&&iPadX!=NpadsX()) {listX[nPads]=iPadX+1; listY[nPads]=iPadY; nPads++;} //3
+ if(iPadY!=1&&iPadY!=NpadsYsec()+1&&2*NpadsYsec()+1) {listX[nPads]=iPadX; listY[nPads]=iPadY-1; nPads++;} //4
+
return nPads;
}//Pad2ClosePads()
//__________________________________________________________________________________________________
-Int_t AliRICHParam::Loc2Sec(Double_t &x,Double_t &y)
-{//Determines sector for a given hit (x,y) and trasform this point to the local system of that sector.
- Int_t sector=kBad;
- Double_t x1=-PcSizeX()/2; Double_t x2=-SectorSizeX()/2-DeadZone(); Double_t x3=-SectorSizeX()/2;
- Double_t x4= SectorSizeX()/2; Double_t x5= SectorSizeX()/2+DeadZone(); Double_t x6= PcSizeX()/2;
-
- if (x>=x1&&x<=x2) {sector=1;x+=PcSizeX()/2;}
- else if(x>=x3&&x<=x4) {sector=2;x+=SectorSizeX()/2;}
- else if(x>=x5&&x<=x6) {sector=3;x-=SectorSizeX()/2+DeadZone();}
- else {return kBad;} //in dead zone
-
- if (y>=-PcSizeY()/2 &&y<=-DeadZone()/2) {y+=PcSizeY()/2; return sector;}
- else if(y> -DeadZone()/2 &&y< DeadZone()/2) {return kBad;} //in dead zone
- else if(y>= DeadZone()/2 &&y<= PcSizeY()/2) {y-=DeadZone()/2; return sector+3;}
- else {return kBad;}
-}//Loc2Sec(Double_t x, Double_t y)
-//__________________________________________________________________________________________________
-Int_t AliRICHParam::Pad2Sec(Int_t &padx, Int_t &pady)
-{//Determines sector for a given pad (padx,pady) and trasform this point to the local system of that sector.
- Int_t sector=kBad;
- if (padx>=1 &&padx<=NpadsXsec()) {sector=1;}
- else if(padx> NpadsXsec() &&padx<=NpadsXsec()*2) {sector=2;padx-=NpadsXsec();}
- else if(padx> NpadsXsec()*2&&padx<=NpadsX()) {sector=3;padx-=NpadsXsec()*2;}
- else {return kBad;}
-
- if (pady>=1 &&pady<= NpadsYsec()) {return sector;}
- else if(pady>NpadsYsec()&&pady<= NpadsY()) {pady-=NpadsYsec();return sector+3;}
- else {return kBad;}
-}//Pad2Sec()
-//__________________________________________________________________________________________________
-Int_t AliRICHParam::Loc2Pad(Double_t x, Double_t y, Int_t &padx, Int_t &pady)
-{//returns pad numbers (iPadX,iPadY) for given point in local coordinates (x,y)
- //count starts in lower left corner from 1,1 to 144,180
-
- padx=pady=kBad;
- Int_t sector=Loc2Sec(x,y);
- if(sector==kBad) return sector;
+Int_t AliRICHParam::Loc2Sec(const TVector2 &v2)
+{
+// Determines sector containing the given point. y ^ 5 6
+// | 3 4
+// | 1 2
+// -------> x
+// Arguments: v2- LORS position [cm]
+// Returns: sector code
+ Double_t x0=0; Double_t x1=SecSizeX(); Double_t x2=SecSizeX()+DeadZone(); Double_t x3=PcSizeX();
+ Double_t y0=0; Double_t y1=SecSizeY(); Double_t y2=SecSizeY()+DeadZone(); Double_t y3=2*SecSizeY()+DeadZone();
+ Double_t y4=PcSizeY()-SecSizeY(); Double_t y5=PcSizeY();
- padx=Int_t(x/PadSizeX())+1;
- if(padx>NpadsXsec()) padx= NpadsXsec();
- if(sector==2||sector==5) padx+=NpadsXsec();
- else if(sector==3||sector==6) padx+=NpadsXsec()*2;
+ Int_t sector=-1;
+ if (v2.X() >= x0 && v2.X() <= x1 ) sector=1;
+ else if(v2.X() >= x2 && v2.X() <= x3 ) sector=2;
+ else return -1;
- pady=Int_t(y/PadSizeY())+1;
- if(pady>NpadsYsec()) padx= NpadsYsec();
- if(sector>0) pady+=NpadsYsec();
-
+ if (v2.Y() >= y0 && v2.Y() <= y1 ) ; //sectors 1 or 2
+ else if(v2.Y() >= y2 && v2.Y() <= y3 ) sector+=2; //sectors 3 or 4
+ else if(v2.Y() >= y4 && v2.Y() <= y5 ) sector+=4; //sectors 5 or 6
+ else return -1;
return sector;
-}//Loc2Pad()
+}//Loc2Sec(Double_t x, Double_t y)
//__________________________________________________________________________________________________
-void AliRICHParam::Pad2Loc(Int_t padx,Int_t pady,Double_t &x,Double_t &y)
+TVector AliRICHParam::Loc2Pad(const TVector2 &loc)
{
- Int_t sector=Pad2Sec(padx,pady);
- if(sector>3)
- y=0.5*DeadZone()+pady*PadSizeY()-0.5*PadSizeY();
- else{
- y=-0.5*PcSizeY()+pady*PadSizeY()-0.5*PadSizeY();
- }
- if(sector==1||sector==4)
- x=-0.5*PcSizeX()+padx*PadSizeX()-0.5*PadSizeX();
- else if(sector==2||sector==5)
- x=-0.5*SectorSizeX()+padx*PadSizeX()-0.5*PadSizeX();
- else
- x= 0.5*SectorSizeX()+DeadZone()+padx*PadSizeX()-0.5*PadSizeX();
- return;
-}//Pad2Loc()
-//__________________________________________________________________________________________________
-Double_t AliRICHParam::GainVariation(Double_t y,Int_t sector)
-{
- if(IsWireSag()){
- if(y>0) y-=SectorSizeY()/2; else y+=SectorSizeY()/2;
- switch(HV(sector)){
- case 2150:
- default:
- return 9e-6*TMath::Power(y,4)+2e-7*TMath::Power(y,3)-0.0316*TMath::Power(y,2)-3e-4*y+25.367;//%
- }
- }else
- return 0;
+//Determines pad number TVector(padx,pady) containing the given point x2 defined in the chamber RS.
+//Pad count starts in lower left corner from 1,1 to 144,160 in upper right corner of a chamber.
+//y ^ 5 6
+// | 3 4
+// | 1 2
+// -------> x
+ TVector pad(2);
+ Int_t sec=Loc2Sec(loc);//trasforms x2 to sector reference system
+ if(sec==-1) {pad[0]=pad[1]=-1; return pad;}
+//first we deal with x
+ if(sec==1||sec==3||sec==5) pad[0]= Int_t( loc.X() / PadSizeX() )+1; //sector 1 or 3 or 5
+ else pad[0]=NpadsX() - Int_t( (PcSizeX()-loc.X()) / PadSizeX() ) ; //sector 2 or 4 or 6
+//second deal with y
+ if(sec==1||sec==2) pad[1]=Int_t( loc.Y() / PadSizeY())+1; //sector 1 or 2
+ else if(sec==3||sec==4) pad[1]=Int_t( (loc.Y()-SecSizeY()-DeadZone()) / PadSizeY())+NpadsYsec()+1; //sector 3 or 4
+ else pad[1]=NpadsY() - Int_t( (PcSizeY()-loc.Y()) / PadSizeY()); //sector 5 or 6
+ return pad;
}
-//__________________________________________________________________________________________________
-Int_t AliRICHParam::Loc2TotQdc(TVector3 x3,Double_t eloss,Int_t iPid,Int_t §or)
-{//calculates the total charge produced by the hit given in local refenrence system
- Double_t x=x3.X(),y=x3.Y();
-
- sector=Loc2Sec(x,y);
-
- Double_t gain=QdcSlope(sector)*(1+GainVariation(x3.Y(),sector)/100);
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+Int_t AliRICHParam::Lors2Pad(Double_t x,Double_t y)
+{
+// Determines abs pad number containing the given point (x,y) defined in the chamber RS.
+// Pad count starts in lower left corner from 1,1 to 144,160 in upper right corner of a chamber.
+// y ^ 5 6
+// | 3 4
+// | 1 2
+// -------> x
+ Int_t padx,pady;
+ if (x>= 0 && x<= SecSizeX() ) padx= 1 + Int_t( x /PadSizeX() ); //sector 1 or 3 or 5
+ else if(x>=SecSizeX()+DeadZone() && x<= PcSizeX() ) padx= NpadsX() - Int_t( (PcSizeX()-x)/PadSizeX() ); //sector 2 or 4 or 6
+ else return -1; //dead zone or out of chamber
+
+ if (y>= 0 && y<= SecSizeY() ) pady= 1 + Int_t( y /PadSizeY() ); //sector 1 or 2
+ else if(y>=SecSizeY()+DeadZone() && y<=2*SecSizeY()+DeadZone() ) pady= 1 + NpadsYsec() + Int_t( (y-SecSizeY()-DeadZone()) / PadSizeY()); //sector 3 or 4
+ else if(y>= PcSizeY()-SecSizeY() && y<= PcSizeY() ) pady= NpadsY() - Int_t( (PcSizeY()-y)/PadSizeY() ); //sector 5 or 6
+ else return -1; //dead zone or out of chamber
+
+ return AliRICHDigit::P2A(0,padx,pady);
+}//Lors2Pad()
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+Int_t AliRICHParam::Pad2Sec(const TVector &pad)
+{
+//Determines sector containing the given pad.
+ Int_t sector=-1;
+ if (pad[0] >= 1 && pad[0] <= NpadsXsec() ) {sector=1;}
+ else if(pad[0] > NpadsXsec() && pad[0] <= NpadsX() ) {sector=2;}
+ else AliDebugClass(1,Form("Wrong pad (%3.0f,%3.0f)",pad[0],pad[1]));
+
+ if (pad[1] >= 1 && pad[1] <= NpadsYsec() ) {}
+ else if(pad[1] > NpadsYsec() && pad[1] <= 2*NpadsYsec() ) {sector+=2;}
+ else if(pad[1] > 2*NpadsYsec() && pad[1] <= NpadsY() ) {sector+=4;}
+ else AliDebugClass(1,Form("Wrong pad (%3.0f,%3.0f)",pad[0],pad[1]));
+
+ return sector;
+}//Pad2Sec()
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+TVector2 AliRICHParam::Pad2Loc(TVector pad)
+{
+//Returns position of the center of the given pad in local system of the chamber (cm)
+// y ^ 5 6
+// | 3 4 sector numbers
+// | 1 2
+// -------> x
+ Double_t x=-1,y=-1;
+ if(pad[0] > 0 && pad[0] <= NpadsXsec())//it's 1 or 3 or 5
+ x=(pad[0]-0.5)*PadSizeX();
+ else if(pad[0] > NpadsXsec() && pad[0] <= NpadsX())//it's 2 or 4 or 6
+ x=(pad[0]-0.5)*PadSizeX()+DeadZone();
+ else
+ AliDebugClass(1,Form("Wrong pad (%3.0f,%3.0f)",pad[0],pad[1]));
- if(iPid>50000){//it's photon => 1 electron
- return Int_t(gain*-TMath::Log(gRandom->Rndm()));
- }else{//it's MIP
- Int_t iNelectrons=Int_t(eloss/IonisationPotential());
- if(iNelectrons==0) return 0;
- Double_t qdc=0;
- for(Int_t i=1;i<=iNelectrons;i++) qdc+=gain*-TMath::Log(gRandom->Rndm());
- return Int_t(qdc);
+ if(pad[1] > 0 && pad[1] <= NpadsYsec())//it's 1 or 2
+ y=(pad[1]-0.5)*PadSizeY();
+ else if(pad[1] > NpadsYsec() && pad[1] <= 2*NpadsYsec())//it's 3 or 4
+ y=(pad[1]-0.5)*PadSizeY()+DeadZone();
+ else if(pad[1] > 2*NpadsYsec() && pad[1]<= NpadsY())//it's 5 or 6
+ y=(pad[1]-0.5)*PadSizeY()+2*DeadZone();
+ else
+ AliDebugClass(1,Form("Wrong pad (%3.0f,%3.0f)",pad[0],pad[1]));
+
+ return TVector2(x,y);
+}
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+TVector2 AliRICHParam::Pad2Loc(Int_t pad)
+{
+// Converts absolute pad number to local position in LORS
+// LORS is a chamber reference system with origin in left-down coner looking from IP
+// Arguments: pad- absolute pad number
+// Returns: pad center position as TVector2 in PCRS
+ TVector2 pos;
+ pos.Set((Pad2PadX(pad)-0.5)*PadSizeX() , (Pad2PadY(pad)-0.5)*PadSizeY());//set to sector LORS
+ return pos;
+}
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+Double_t AliRICHParam::GainSag(Double_t x,Int_t sector)
+{
+//Returns % of gain variation due to wire sagita.
+//All curves are parametrized as per sector basis, so x must be apriory transformed to the Sector RS.
+//Here x is a distance along wires.
+ x-=SecSizeX()/2;
+ if(x>SecSizeX()) x-=SecSizeX();
+ switch(HV(sector)){
+ case 2150: return 9e-6*TMath::Power(x,4)+2e-7*TMath::Power(x,3)-0.0316*TMath::Power(x,2)-3e-4*x+25.367;//%
+ case 2100: return 8e-6*TMath::Power(x,4)+2e-7*TMath::Power(x,3)-0.0283*TMath::Power(x,2)-2e-4*x+23.015;
+ case 2050: return 7e-6*TMath::Power(x,4)+1e-7*TMath::Power(x,3)-0.0254*TMath::Power(x,2)-2e-4*x+20.888;
+ case 2000: return 6e-6*TMath::Power(x,4)+8e-8*TMath::Power(x,3)-0.0227*TMath::Power(x,2)-1e-4*x+18.961;
+ default: return 0;
}
}
-//__________________________________________________________________________________________________
-Double_t AliRICHParam::Loc2PadFrac(TVector3 hitX3,Int_t padx,Int_t pady)
-{//
- Double_t padXcenter=0,padYcenter=0; Pad2Loc(padx,pady,padXcenter,padYcenter);
-
- //correction to the position of the nearest wire
-
- Double_t normXmin=(hitX3.X()-padXcenter-PadSizeX()/2) /AnodeCathodeGap();
- Double_t normXmax=(hitX3.X()-padXcenter+PadSizeX()/2) /AnodeCathodeGap();
- Double_t normYmin=(hitX3.Y()-padYcenter-PadSizeY()/2) /AnodeCathodeGap();
- Double_t normYmax=(hitX3.Y()-padYcenter+PadSizeY()/2) /AnodeCathodeGap();
-
- return Mathieson(normXmin,normYmin,normXmax,normYmax);
-}//Loc2PadQdc()
-//__________________________________________________________________________________________________
-Double_t AliRICHParam::Mathieson(Double_t xMin,Double_t yMin,Double_t xMax,Double_t yMax)
-{//see NIM A370(1988)602-603
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+Double_t AliRICHParam::QdcSag(Int_t iPad)
+{
+// It was observed at BNL that wires are affected by gravitation field providing a significant sagita leading to the local electric field variation
+// which means that different pads produce different signals.
+// Arguments: iPad- absolute pad number
+// Returns: gain variation due to wire sagita 0 < QdcSag < 1.
+// Curves are parametrised in terms of distance x (cm) along wires having 0 on the left edge of the photocathode
+ Double_t x=AliRICHDigit::P2X(iPad)*PadSizeX()-0.5*PadSizeX(); //center of the padx (count from 1)
+ switch(HV(iPad)){
+ case 2150: return 0.01*(9e-6*TMath::Power(x,4)+2e-7*TMath::Power(x,3)-0.0316*TMath::Power(x,2)-3e-4*x+25.367);//function is a fit in % so multiply by 0.01
+ case 2100: return 0.01*(8e-6*TMath::Power(x,4)+2e-7*TMath::Power(x,3)-0.0283*TMath::Power(x,2)-2e-4*x+23.015);
+ case 2050: return 0.01*(7e-6*TMath::Power(x,4)+1e-7*TMath::Power(x,3)-0.0254*TMath::Power(x,2)-2e-4*x+20.888);
+ case 2000: return 0.01*(6e-6*TMath::Power(x,4)+8e-8*TMath::Power(x,3)-0.0227*TMath::Power(x,2)-1e-4*x+18.961);
+ default: return 0;
+ }
+}//QdcSag()
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+Int_t AliRICHParam::QdcTot(Int_t iPad,Double_t e)
+{
+// Calculates the total charge produced by the hit. Method:
+// 1. number of electrons is calculated as energy lost in amp gas divided by ionisation potential (for photon only one electron as Etot is always less then ionization potential)
+// 2. each electron imposes a charge distributed as Poisson with QdcEle() mean. Different pads produce different means. See QdcEle().
+// Arguments: iPad- absolute pad number contaning the hit;
+// e- Eloss for mip in amplification gas or Etot for photon
+// Returns: charge parametrised in QDC channels.
+ Int_t iNele=Int_t(e/IonPot()); if(iNele==0) iNele=1;//e < ion. pot. means it's photoelectron
+ Double_t dQdc=0;
+ for(Int_t i=1;i<=iNele;i++) dQdc+=-QdcEle(iPad)*TMath::Log(gRandom->Rndm());
+ return Int_t(dQdc);
+}//QdcTot()
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+Int_t AliRICHParam::TotQdc(TVector2 x2,Double_t eloss)
+{
+//Calculates the total charge produced by the eloss in point x2 (Chamber RS).
+//Returns this change parametrised in QDC channels, or 0 if the hit in the dead zone.
+//eloss=0 means photon which produces 1 electron only eloss > 0 for Mip
+ if(Loc2Sec(x2)==-1) return 0; //hit in the dead zone
+ Int_t iNelectrons=Int_t(eloss/IonisationPotential()); if(iNelectrons==0) iNelectrons=1;
+ Double_t qdc=0;
+ for(Int_t i=1;i<=iNelectrons;i++) qdc+=-Gain(x2)*TMath::Log(gRandom->Rndm());
+ return Int_t(qdc);
+}
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+Double_t AliRICHParam::FracQdc(const TVector2 &x2,const TVector &pad)
+{
+//Calculates the charge fraction induced to given pad by the hit from the given point.
+//Integrated Mathieson distribution is used.
+ TVector2 center2=Pad2Loc(pad);//gives center of requested pad
+ Double_t normXmin=(x2.X()-center2.X()-PadSizeX()/2) /Pc2Cath();//parametrise for Mathienson
+ Double_t normXmax=(x2.X()-center2.X()+PadSizeX()/2) /Pc2Cath();
+ Double_t normYmin=(x2.Y()-center2.Y()-PadSizeY()/2) /Pc2Cath();
+ Double_t normYmax=(x2.Y()-center2.Y()+PadSizeY()/2) /Pc2Cath();
+
+//requested pad might not belong to the sector of the given hit position, hence the check:
+ return (Loc2Sec(x2)!=Pad2Sec(pad)) ? 0:Mathieson(normXmin, normYmin, normXmax, normYmax);
+}
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+Double_t AliRICHParam::Mathieson(Double_t x1,Double_t y1,Double_t x2,Double_t y2)
+{
+// This is the answer to electrostatic problem of charge distrubution in MWPC described elsewhere. (NIM A370(1988)602-603)
+// Arguments: x1- diff between center of distribution which is a hit position and left edge of interested pad divided by anod-cathode distance
+// x2- right edge of the pad
+// y1- up edge of the pad
+// y2- bottom edge of the pad
+// Returns: a charge fraction [0-1] imposed into the pad
const Double_t kSqrtKx3=0.77459667;const Double_t kX2=0.962;const Double_t kX4=0.379;
const Double_t kSqrtKy3=0.77459667;const Double_t kY2=0.962;const Double_t kY4=0.379;
- Double_t ux1=kSqrtKx3*TMath::TanH(kX2*xMin);
- Double_t ux2=kSqrtKx3*TMath::TanH(kX2*xMax);
- Double_t uy1=kSqrtKy3*TMath::TanH(kY2*yMin);
- Double_t uy2=kSqrtKy3*TMath::TanH(kY2*yMax);
+ Double_t ux1=kSqrtKx3*TMath::TanH(kX2*x1);
+ Double_t ux2=kSqrtKx3*TMath::TanH(kX2*x2);
+ Double_t uy1=kSqrtKy3*TMath::TanH(kY2*y1);
+ Double_t uy2=kSqrtKy3*TMath::TanH(kY2*y2);
return 4*kX4*(TMath::ATan(ux2)-TMath::ATan(ux1))*kY4*(TMath::ATan(uy2)-TMath::ATan(uy1));
-}
-//__________________________________________________________________________________________________
-void AliRICHParam::Loc2Area(TVector3 hitX3,Int_t &iPadXmin,Int_t &iPadYmin,Int_t &iPadXmax,Int_t &iPadYmax)
-{//calculates the area of disintegration for a given hit. Area is a rectangulare set pf pads
- //defined by its left-down and right-up coners
- // hitX3.SetX(Shift2NearestWire(hitX3.X());
- Loc2Pad(hitX3.X()-MathiesonDeltaX(),hitX3.Y()-MathiesonDeltaY(),iPadXmin,iPadYmin);
- Loc2Pad(hitX3.X()+MathiesonDeltaX(),hitX3.Y()+MathiesonDeltaY(),iPadXmax,iPadYmax);
-}//
-//__________________________________________________________________________________________________
-Bool_t AliRICHParam::IsOverTh(Int_t iChamber, Int_t x, Int_t y, Double_t q)
-{// Calculate the new charge subtracting pedestal and if the current digit is over threshold
- if(q>NsigmaTh()*fSigmaThMap[iChamber-1][x-1][y-1]) return kTRUE; else return kFALSE;
-}//
+}
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+TVector AliRICHParam::Loc2Area(const TVector2 &x2)
+{
+// Calculates the area of disintegration for a given point. It's assumed here that this points lays on anode wire.
+// Area is a rectangulare set of pads defined by its left-down and right-up coners.
+ TVector area(4);
+ TVector pad=Loc2Pad(x2);
+ area[0]=area[2]=pad[0]; area[1]=area[3]=pad[1];//area is just a pad fired
+ if(pad[0]!=1 && pad[0]!= NpadsXsec()+1 ) area[0]--; //left down coner X
+ if(pad[1]!=1 && pad[1]!= NpadsYsec()+1 && pad[1]!= 2*NpadsYsec()+1) area[1]--; //left down coner Y
+ if(pad[0]!=NpadsXsec() && pad[0]!= NpadsX() ) area[2]++; //right up coner X
+ if(pad[1]!=NpadsYsec() && pad[1]!= 2*NpadsYsec() && pad[1]!= NpadsY() ) area[3]++; //right up coner Y
+ return area;
+}
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+Bool_t AliRICHParam::IsOverTh(Int_t ,TVector ,Double_t qdc)
+{
+// Checks if the current QDC is over threshold and FEE will save this value to data concentrator.
+// This is done on pad by pad level, so the pad pedestal map is to be used. ??????????????
+// Arguments:
+// Returns: true if QDC over treshold
+ return (qdc>NsigmaTh()*(SigmaThMean()+(1.-2*gRandom->Rndm())*SigmaThSpread())); //??????????? to be change to real values
+}
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+TGeoMatrix* AliRICHParam::Matrix(Int_t iChamN,Int_t iPlane)
+{
+ TGeoHMatrix *pMatrix=new TGeoHMatrix;
+
+ const Double_t kAngHor=19.5; // horizontal angle between chambers 19.5 grad
+ const Double_t kAngVer=20; // vertical angle between chambers 20 grad
+ const Double_t kAngCom=30; // common RICH rotation with respect to x axis 30 grad
+
+ pMatrix->RotateY(90); //rotate around y since initial position is in XY plane -> now in YZ plane
+ Double_t trans[3]={490,0,0}; //center of the chamber is on window-gap surface
+
+ switch(iPlane){
+ case kCenter: break;
+ case kPc : trans[0]+=PcZ(); break;
+ case kRad : trans[0]+=RadZ(); break;
+ case kAnod : trans[0]+=AnodZ(); break;
+ default: return 0; break;
+ }
+ pMatrix->SetTranslation(trans); //now plane in YZ is shifted along x
+
+ switch(iChamN){
+ case 1: pMatrix->RotateY(kAngHor); pMatrix->RotateZ(-kAngVer); break; //right and down
+ case 2: pMatrix->RotateZ(-kAngVer); break; //down
+ case 3: pMatrix->RotateY(kAngHor); break; //right
+ case 4: break; //no rotation
+ case 5: pMatrix->RotateY(-kAngHor); break; //left
+ case 6: pMatrix->RotateZ(kAngVer); break; //up
+ case 7: pMatrix->RotateY(-kAngHor); pMatrix->RotateZ(kAngVer); break; //left and up
+ default: return 0; break;
+ }//switch(iChamber)
+ pMatrix->RotateZ(kAngCom); //apply common rotation in XY plane
+ return pMatrix;
+}//Matrix()
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+TVector3 AliRICHParam::Lors2Mars(Int_t iChId,Double_t x,Double_t y,Int_t iPlnId)
+{
+// Trasform from LORS to MARS
+// Arguments: iChId - chamber code 1..7
+// x,y - point in LORS
+// iPlnN - chamber plane code might be kPc kRad kCenter kAnod
+ Double_t z=0;
+ switch(iPlnId){
+ case kPc : z=PcZ() ; break;
+ case kAnod : z=AnodZ(); break;
+ case kCenter: z=0 ; break;
+ case kRad : z=RadZ() ; break;
+ }
+ Double_t lors[3]={x-0.5*PcSizeX(),y-0.5*PcSizeY(),z}, mars[3];
+ fMatrix[iChId-1]->LocalToMaster(lors,mars);
+ return TVector3(mars);
+}
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+TVector3 AliRICHParam::Lors2MarsVec(Int_t iCh,const TVector3 &p)
+{
+ Double_t mars[3], lors[3]; p.GetXYZ(lors);
+ fMatrix[iCh-1]->LocalToMasterVect(lors,mars);
+ return TVector3(mars);
+}
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+TVector2 AliRICHParam::Mars2Lors(Int_t iChId,const TVector3 &x,Int_t iPlnId)
+{
+// Trasform from MARS to LORS
+// Arguments: iChId - chamber code 1..7
+// mars - point in MARS
+// iPlnN - chamber plane code might be kPc kRad kCenter kAnod
+ Double_t z=0;
+ switch(iPlnId){
+ case kPc : z=PcZ() ; break;
+ case kAnod : z=AnodZ(); break;
+ case kCenter: z=0 ; break;
+ case kRad : z=RadZ() ; break;
+ }
+ Double_t lors[3],mars[3];
+ x.GetXYZ(mars);
+ fMatrix[iChId-1]->MasterToLocal(mars,lors);
+ return TVector2(lors[0]+0.5*PcSizeX(),lors[1]+0.5*PcSizeY());
+}
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+TVector3 AliRICHParam::Mars2LorsVec(Int_t iCh,const TVector3 &p)
+{
+ Double_t mars[3], lors[3]; p.GetXYZ(mars);
+ fMatrix[iCh-1]->MasterToLocalVect(mars,lors);
+ return TVector3(lors);
+}
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+TVector3 AliRICHParam::Lors2MarsOld(Int_t iChId,Double_t x,Double_t y,Int_t iPlnId)
+{
+// Trasform from LORS to MARS
+// Arguments: iChId - chamber code 0..6
+// x,y - point in LORS
+// iPlnN - chamber plane code might be kPc kRad kCenter kAnod
+ TGeoMatrix *pMatrix=Matrix(iChId,iPlnId);
+ Double_t lors[3]={x-0.5*PcSizeX(),y-0.5*PcSizeY(),0}, mars[3]; pMatrix->LocalToMaster(lors,mars); delete pMatrix;
+ return TVector3(mars);
+}
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+TVector2 AliRICHParam::Mars2LorsOld(Int_t iChamN,const TVector3 &x,Int_t iPlaneN)
+{
+ TGeoMatrix *pMatrix=Matrix(iChamN,iPlaneN);
+ Double_t mars[3]={x.X(),x.Y(),x.Z()} , lors[3]; pMatrix->MasterToLocal(mars,lors); delete pMatrix;
+ return TVector2(lors[0]+0.5*PcSizeX(),lors[1]+0.5*PcSizeY());
+}
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+TVector3 AliRICHParam::Center(Int_t iChamN,Int_t iPlaneN)
+{
+ TGeoMatrix *pMatrix=Matrix(iChamN,iPlaneN);
+ Double_t mars[3] , lors[3]={0,0,0}; pMatrix->LocalToMaster(lors,mars); delete pMatrix;
+ return TVector3(mars);
+}
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+TVector3 AliRICHParam::Norm(Int_t iChamN)
+{
+ TGeoMatrix *pMatrix=Matrix(iChamN,kPc);
+ Double_t mars[3] , lors[3]={0,0,1}; pMatrix->LocalToMasterVect(lors,mars); delete pMatrix;
+ return TVector3(mars);
+}
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+Int_t AliRICHParam::Hit2SDigs(Int_t iHitPad,Double_t e,TClonesArray *pSDigLst)
+{
+// Determines a number of pads affected by the hit and calculates the charge induced to each pad.
+// Integrated Mathieson distribution is used. Invoked from AliRICHvX::Hits2SDigits()
+// Arguments: iHitPad - hit pad absolute number
+// e - energy (GeV) of this hit (Eloss for mip or Etot for photon)
+// pSDigLst - pointer to clones array to store in calculated sdigits
+// Returns: total QDC for this hit
+ Int_t iQtot=QdcTot(iHitPad,e); //total QDC value collected for this hit
+ Int_t a=1; //analise current pad +- a pads in both directions
+ Int_t iLeftX=0,iBotY=0,iRightX=0,iTopY=0; //area of disintegration for cluster formation, shifts to hit pad, not pad numbers
+ if(AliRICHDigit::P2X(iHitPad) > a) iLeftX =-a;//determine area of disintegration as hit pad +- parametrised number
+ if(AliRICHDigit::P2X(iHitPad) < AliRICHDigit::kPadsSecX-a) iRightX= a;//of pads. this number is determined by5 sigmas of Mathieson shape
+ if(AliRICHDigit::P2Y(iHitPad) > a) iBotY =-a;//see RICH TDR page 29
+ if(AliRICHDigit::P2Y(iHitPad) < AliRICHDigit::kPadsSecY-a) iTopY = a;//also boundary conditions are checked (edge of sector aka PC)
+ Int_t iPadsCnt=0;
+ for(Int_t iShiftX=iLeftX;iShiftX<=iRightX;iShiftX++){//affected pads loop iShiftX is a distance (in pads) between hit pad and pad under analisys
+ for(Int_t iShiftY=iBotY;iShiftY<=iTopY;iShiftY++){//affected pads loop
+ iHitPad+=AliRICHDigit::kPadAbsX*iShiftX+iShiftY;
+ Double_t x1=PadSizeX()/Pc2Cath()*(iShiftX-0.5);//parametrise for Mathienson
+ Double_t x2=PadSizeX()/Pc2Cath()*(iShiftX+0.5);//parametrise for Mathienson
+ Double_t y1=PadSizeY()/Pc2Cath()*(iShiftY-0.5);//parametrise for Mathienson
+ Double_t y2=PadSizeY()/Pc2Cath()*(iShiftY+0.5);//parametrise for Mathienson
+ (*pSDigLst)[iPadsCnt++]= new AliRICHDigit(iHitPad,iQtot*Mathieson(x1,y1,x2,y2));
+ }//Y loop
+ }//X loop
+ return iQtot;
+}//Hit2SDigs() for abs pad
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+Int_t AliRICHParam::Hit2SDigs(TVector2 hitX2,Double_t e,TClonesArray *pSDigLst)
+{
+// Determines a number of pads affected by the hit and calculates the charge induced to each pad.
+// Integrated Mathieson distribution is used. Invoked from AliRICHvX::Hits2SDigits()
+// Arguments: hitX2 - hit position in LORS, cm
+// e - energy (GeV) of this hit (Eloss for mip or Etot for photon)
+// pSDigLst - pointer to clones array to store in calculated sdigits
+// Returns: total QDC for this hit
+ Int_t iQtot=TotQdc(hitX2,e);//total charge produced by hit, 0 if hit in dead zone
+ if(iQtot==0) return 0;
+
+ TVector hitPad=Loc2Pad(hitX2); TVector2 padCenterX2=Pad2Loc(hitPad); //shift the hit position to the nearest anod wire
+ TVector2 anod;
+ if((hitX2.Y()-padCenterX2.Y())>0) anod.Set(hitX2.X(),padCenterX2.Y()+AnodPitch()/2); //upper part of the pad: shift to upper anod wire
+ else anod.Set(hitX2.X(),padCenterX2.Y()-AnodPitch()/2); //lower part of the pad: shift to lower anod wire
+
+ TVector area=Loc2Area(anod);//determine affected pads, dead zones analysed inside
+ TVector pad(2); //current pad
+ Int_t iPadsCnt=0;
+ for(pad[1]=area[1];pad[1]<=area[3];pad[1]++){//affected pads loop
+ for(pad[0]=area[0];pad[0]<=area[2];pad[0]++){
+ Double_t dQpad=iQtot*FracQdc(anod,pad);
+ if(dQpad>0.1) (*pSDigLst)[iPadsCnt++]= new AliRICHDigit(pad,dQpad);//make sdigit if Qpad is large enough, meaning after merging there is a chance to go above threshold
+ }//X loop
+ }//Y loop
+ return iQtot;
+}//Hit2SDigs() for TVector2
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+Double_t AliRICHParam::SigmaSinglePhotonFormula(Double_t thetaC, Double_t phiC, Double_t thetaM, Double_t phiM, Double_t betaM)
+{
+// Analithical calculation of total error (as a sum of localization, geometrical and chromatic errors) on Cerenkov angle for a given Cerenkov photon
+// created by a given MIP. Fromulae according to CERN-EP-2000-058
+// Arguments: Cerenkov and azimuthal angles for Cerenkov photon, [radians]
+// dip and azimuthal angles for MIP taken at the entrance to radiator, [radians]
+// MIP beta
+// Returns: absolute error on Cerenkov angle, [radians]
+
+ TVector3 v(-999,-999,-999);
+
+ v.SetX(ErrLoc (thetaC,phiC,thetaM,phiM,betaM));
+ v.SetY(ErrGeom(thetaC,phiC,thetaM,phiM,betaM));
+ v.SetZ(ErrCrom(thetaC,phiC,thetaM,phiM,betaM));
+
+ return v.Mag2();
+}
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+Double_t AliRICHParam::ErrLoc(Double_t thetaC, Double_t phiC, Double_t thetaM, Double_t phiM, Double_t betaM)
+{
+// Analithical calculation of localization error (due to finite segmentation of PC) on Cerenkov angle for a given Cerenkov photon
+// created by a given MIP. Fromulae according to CERN-EP-2000-058
+// Arguments: Cerenkov and azimuthal angles for Cerenkov photon, [radians]
+// dip and azimuthal angles for MIP taken at the entrance to radiator, [radians]
+// MIP beta
+// Returns: absolute error on Cerenkov angle, [radians]
+ Double_t refC6F14m = 1.29337;
+ Double_t phiDelta = phiC - phiM;
+
+ Double_t alpha =TMath::Cos(thetaM)-TMath::Tan(thetaC)*TMath::Cos(phiDelta)*TMath::Sin(thetaM);
+ Double_t k = 1.-refC6F14m*refC6F14m+alpha*alpha/(betaM*betaM);
+ if (k<0) return 1e10;
+
+ Double_t mu =TMath::Sin(thetaM)*TMath::Sin(phiM)+TMath::Tan(thetaC)*(TMath::Cos(thetaM)*TMath::Cos(phiDelta)*TMath::Sin(phiM)+TMath::Sin(phiDelta)*TMath::Cos(phiM));
+ Double_t e =TMath::Sin(thetaM)*TMath::Cos(phiM)+TMath::Tan(thetaC)*(TMath::Cos(thetaM)*TMath::Cos(phiDelta)*TMath::Cos(phiM)-TMath::Sin(phiDelta)*TMath::Sin(phiM));
+
+ Double_t kk = betaM*TMath::Sqrt(k)/(Pc2Win()*alpha);
+ Double_t dtdxc = kk*(k*(TMath::Cos(phiDelta)*TMath::Cos(phiM)-TMath::Cos(thetaM)*TMath::Sin(phiDelta)*TMath::Sin(phiM))-(alpha*mu/(betaM*betaM))*TMath::Sin(thetaM)*TMath::Sin(phiDelta));
+ Double_t dtdyc = kk*(k*(TMath::Cos(phiDelta)*TMath::Sin(phiM)+TMath::Cos(thetaM)*TMath::Sin(phiDelta)*TMath::Cos(phiM))+(alpha* e/(betaM*betaM))*TMath::Sin(thetaM)*TMath::Sin(phiDelta));
+
+ return TMath::Sqrt(0.2*0.2*dtdxc*dtdxc + 0.25*0.25*dtdyc*dtdyc);
+}
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+Double_t AliRICHParam::ErrCrom(Double_t thetaC, Double_t phiC, Double_t thetaM, Double_t phiM, Double_t betaM)
+{
+// Analithical calculation of chromatic error (due to lack of knowledge of Cerenkov photon energy) on Cerenkov angle for a given Cerenkov photon
+// created by a given MIP. Fromulae according to CERN-EP-2000-058
+// Arguments: Cerenkov and azimuthal angles for Cerenkov photon, [radians]
+// dip and azimuthal angles for MIP taken at the entrance to radiator, [radians]
+// MIP beta
+// Returns: absolute error on Cerenkov angle, [radians]
+ Double_t phiDelta = phiC - phiM;
+ Double_t refC6F14m = 1.29337;
+ Double_t alpha =TMath::Cos(thetaM)-TMath::Tan(thetaC)*TMath::Cos(phiDelta)*TMath::Sin(thetaM);
+
+ //cout << "alpha : "<<alpha<<" thetaC : "<<thetaC<<endl;
+ Double_t dtdn = TMath::Cos(thetaM)*refC6F14m*betaM*betaM/(alpha*TMath::Tan(thetaC));
+
+ Double_t f = 0.00928*(7.75-5.635)/TMath::Sqrt(12.);
+
+ return f*dtdn;
+}
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+Double_t AliRICHParam::ErrGeom(Double_t thetaC, Double_t phiC, Double_t thetaM, Double_t phiM, Double_t betaM)
+{
+// Analithical calculation of geometric error (due to lack of knowledge of creation point in radiator) on Cerenkov angle for a given Cerenkov photon
+// created by a given MIP. Fromulae according to CERN-EP-2000-058
+// Arguments: Cerenkov and azimuthal angles for Cerenkov photon, [radians]
+// dip and azimuthal angles for MIP taken at the entrance to radiator, [radians]
+// MIP beta
+// Returns: absolute error on Cerenkov angle, [radians]
+
+ Double_t phiDelta = phiC - phiM;
+ Double_t refC6F14m = 1.29337;
+ Double_t alpha =TMath::Cos(thetaM)-TMath::Tan(thetaC)*TMath::Cos(phiDelta)*TMath::Sin(thetaM);
+
+ Double_t k = 1.-refC6F14m*refC6F14m+alpha*alpha/(betaM*betaM);
+ if (k<0) return 1e10;
+
+ Double_t eTr = 0.5*RadThick()*betaM*TMath::Sqrt(k)/(Pc2Win()*alpha);
+ Double_t lambda = 1.-TMath::Sin(thetaM)*TMath::Sin(thetaM)*TMath::Sin(phiC)*TMath::Sin(phiC);
+
+ Double_t c = 1./(1.+ eTr*k/(alpha*alpha*TMath::Cos(thetaC)*TMath::Cos(thetaC)));
+ Double_t i = betaM*TMath::Tan(thetaC)*lambda*TMath::Power(k,1.5);
+ Double_t ii = 1.+eTr*betaM*i;
+
+ Double_t err = c * (i/(alpha*alpha*Pc2Win()) + ii*(1.-lambda) / ( alpha*alpha*Pc2Win()*betaM*(1.+eTr)) );
+ Double_t trErr = RadThick()/(TMath::Sqrt(12.)*TMath::Cos(thetaM));
+
+ return trErr*err;
+}//ErrGeom()
+
#endif //AliRICHParam_h
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff