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d48cca74 1#ifndef AliRICHParam_h
2#define AliRICHParam_h
3
db910db9 4#include <TNamed.h> //base class
5#include <TMath.h> //QdcTot()
6#include <TVector.h> //old style
3582c1f9 7#include <TVector2.h>
e42a7b46 8#include <TVector3.h>
998b831f 9#include <TRandom.h>
db910db9 10#include <TClonesArray.h> //Hit2SDigs()
998b831f 11#include <AliLog.h>
db910db9 12#include <TGeoMatrix.h> //Mars2Lors() Lors2Mars()
13#include <TF1.h> //fields
14#include <TF2.h> //fields
15#include "AliRICHDigit.h" //Hit2Sdigs()
16#include <TGeoManager.h> //Instance()
998b831f 17
e42a7b46 18static const int kNchambers=7; //number of RICH chambers
19static const int kNpadsX = 160; //number of pads along X in single chamber
20static const int kNpadsY = 144; //number of pads along Y in single chamber
e42a7b46 21static const int kNsectors=6; //number of sectors per chamber
ed3ceb24 22
ed3ceb24 23static const int kCerenkov=50000050; //??? go to something more general like TPDGCode
24static const int kFeedback=50000051; //??? go to something more general like TPDGCode
25
ae754cdf 26// Class providing all the needed parametrised information
27// to construct the geometry, to define segmentation and to provide response model
28// In future will also provide all the staff needed for alignment and calibration
29
30
db910db9 31class AliRICHParam :public TNamed
d48cca74 32{
33public:
a25b3368 34//ctor&dtor
db910db9 35 virtual ~AliRICHParam() {delete fIdxC6F14;fgInstance=0;}
a25b3368 36//test methodes
c4a03891 37 void Print(Option_t *opt="") const; //print current parametrization
d3eb6079 38 static void DrawAxis();
39 static void DrawSectors();
a25b3368 40//flags staff
db910db9 41 static inline AliRICHParam* Instance(); //pointer to AliRICHParam singleton
a25b3368 42 static void SetWireSag(Bool_t a) {fgIsWireSag=a;}
43 static Bool_t IsWireSag() {return fgIsWireSag;}
44 static void SetResolveClusters(Bool_t a) {fgIsResolveClusters=a;}
45 static Bool_t IsResolveClusters() {return fgIsResolveClusters;}
db910db9 46 static Int_t Stack(Int_t evt=-1,Int_t tid=-1); //Print stack info for event and tid
47 static Int_t StackCount(Int_t pid,Int_t evt); //Counts stack particles of given sort in given event
48 static inline Double_t ErrLoc (Double_t thetaC,Double_t phiC,Double_t thetaT,Double_t phiT,Double_t beta);
49 static inline Double_t ErrGeom (Double_t thetaC,Double_t phiC,Double_t thetaT,Double_t phiT,Double_t beta);
50 static inline Double_t ErrCrom (Double_t thetaC,Double_t phiC,Double_t thetaT,Double_t phiT,Double_t beta);
51 static inline TVector3 SigmaSinglePhotonFormula(Double_t thetaC,Double_t phiC,Double_t thetaT,Double_t phiT,Double_t beta);
a25b3368 52//Geometrical properties
db910db9 53 static Int_t NpadsX () {return kNpadsX;} //number of pads along X in chamber
54 static Int_t NpadsY () {return kNpadsY;} //number of pads along Y in chamber
55 static Int_t NpadsXsec () {return NpadsX()/2;} //number of pads along X in sector
56 static Int_t NpadsYsec () {return NpadsY()/3;} //number of pads along Y in sector
57
58 static Double_t AnodPitch () {return PadSizeY()/2;} //cm between anode wires
59 static Double_t AnodZ () {return 7.806;} //Z positon of anod plane in LORS of the chamber, [cm]
60 static Double_t CathPitch () {return PadSizeY()/4;} //dist between cathode wires [cm]
61 static Double_t CollPitch () {return 0.5;} //dist between collection wires [cm]
62 static Double_t DeadZone () {return 2.6;} //dead zone thickness [cm]
63 static Double_t PadSizeX () {return 0.8;} //pad size x [cm]
64 static Double_t PadSizeY () {return 0.84;} //pad size y [cm]
65 static Double_t PcSizeX () {return NpadsX()*PadSizeX()+DeadZone();} //PC size x [cm]
66 static Double_t PcSizeY () {return NpadsY()*PadSizeY()+2*DeadZone();} //PC size y [cm]
67 static Double_t Pc2Cath () {return 0.445;} //dist between PC entrance plane and cathode wires plane [cm]
68 static Double_t Pc2Win () {return PcZ();} //dist between PC entrance plane and window exit plane [cm]
69 static Double_t PcZ () {return 8.0; } //Z positon of PC entrance plane in LORS of the chamber [cm]
70 static Double_t RadThick () {return 1.5;} //radiator thickness [cm]
71 static Double_t RadZ () {return -2.0; } //Z positon of radiator entrance plane in LORS of the chamber [cm]
72 static Double_t SecSizeX () {return NpadsX()*PadSizeX()/2;} //sector size x [cm]
73 static Double_t SecSizeY () {return NpadsY()*PadSizeY()/3;} //sector size y [cm ]
74 static Double_t WinThick () {return 0.5;} //radiator window thickness [cm]
75
76
0422a446 77//trasformation methodes
db910db9 78 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
79 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
80
81 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
82 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
83 static inline TVector3 Mars2LorsVec (Int_t c,const TVector3 &p ); //MARS->LORS transform of vector for chamber c
84 static inline TVector3 Center (Int_t c,Int_t p ); //Center of plane p of chamber c in MARS (cm)
85 static inline TVector3 Norm (Int_t c ); //Norm vector to the chamber c in MARS (cm)
86 static inline TGeoMatrix*Matrix (Int_t iCh, Int_t iPlane ); //TGeoMatrix for the given chamber plain
87
0422a446 88 static Int_t Pad2Cha (Int_t pad ){return pad/100000000; }//abs pad -> chamber
89 static Int_t Pad2Sec (Int_t pad ){return pad%100000000/1000000; }//abs pad -> sector
90 static Int_t Pad2PadX (Int_t pad ){return pad%1000000/1000; }//abs pad -> pad x
91 static Int_t Pad2PadY (Int_t pad ){return pad%1000000%100; }//abs pad -> pad y
92 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
93 static inline TVector2 Pad2Loc (Int_t pad ); //abs pad ->LORS
94 static inline TVector2 Pad2Loc (TVector pad ); //pad -> LORS returns center of the pad
95 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)
96 static inline TVector Loc2Area (const TVector2 &x2 ); //pads area affected by hit x2. area is LeftDown-RightUp pad numbers
97 static inline Int_t Loc2Sec (const TVector2 &x2 ); //LORS -> sector
98 static Int_t Loc2Sec (Double_t x,Double_t y ){return Loc2Sec(TVector2(x,y));} //LORS -> sector
99 static inline TVector Loc2Pad (const TVector2 &x2 ); //LORS -> pad
100 static TVector Loc2Pad (Double_t x,Double_t y ){return Loc2Pad(TVector2(x,y));} //LORS -> pad
101 static inline Int_t Pad2Sec (const TVector &pad ); //pad -> sector
102 static inline Int_t PadNeighbours (Int_t iPadX,Int_t iPadY,Int_t aListX[4],Int_t aListY[4]); //pad -> list of it neighbours
103 static Bool_t IsAccepted (const TVector2 &x2 ){return ( x2.X()>=0 && x2.X()<=PcSizeX() && x2.Y()>=0 && x2.Y()<=PcSizeY() ) ? kTRUE:kFALSE;}
104//optical properties methodes
db910db9 105 static Float_t EckovMean ( ){return 6.766e-9;} //mean Ckov energy according to the total trasmission curve
106 static Float_t EckovMin ( ){return fEckovMin;} //min photon energy [GeV] defined in optical curves
107 static Float_t EckovMax ( ){return fEckovMax;} //min photon energy [GeV] defined in optical curves
108
109 static Float_t AbsCH4 (Float_t gev ); //AbsLen [cm]=f(Eckov) [GeV] for CH4 used as amp gas
db910db9 110 static Float_t AbsAir (Float_t gev ){return fgAbsAir.Eval(gev);} //AbsLen [cm]=f(Eckov) [GeV] for air
111
112 Float_t IdxC6F14 (Float_t gev ){return fIdxC6F14->Eval(gev,fIdxC6F14->GetUniqueID());} //n=f(Eckov) [GeV] for C6H14 used as radiator
113 static Float_t IdxSiO2 (Float_t gev ){return fgIdxSiO2 .Eval(gev);} //n=f(Eckov) [GeV] for SiO2 used as window TDR p.35
114 static Float_t IdxCH4 (Float_t gev ){return fgIdxCH4 .Eval(gev);} //n=f(Eckov) [GeV] for CF4
db910db9 115 static Float_t IdxAir (Float_t gev ){return fgIdxAir .Eval(gev);} //n=f(Eckov) [GeV] for air
db910db9 116
117 void CdbRead (Int_t run,Int_t version ); //read all calibration information for requested run
e42a7b46 118
e42a7b46 119 static Double_t IonisationPotential() {return 26.0e-9;} //for CH4 in GeV taken from ????
120 static TVector2 MathiesonDelta() {return TVector2(5*0.18,5*0.18);} //area of 5 sigmas of Mathieson distribution (cm)
121 static Int_t MaxQdc() {return 4095;} //QDC number of channels
fab9e039 122
db910db9 123
fab9e039 124 static Int_t QthMIP() {return 100;}
125 static Double_t DmatchMIP() {return 1.;}
126 static Double_t PmodMax() {return 6.5;}
0fe8fa07 127 static Int_t HV(Int_t sector) {if (sector>=1 && sector <=6) return fgHV[sector-1]; else return -1;} //high voltage for this sector
3582c1f9 128 static void SetHV(Int_t sector,Int_t hv){fgHV[sector-1]=hv;}
a25b3368 129//charge response methodes
130 inline static Double_t Mathieson(Double_t x1,Double_t x2,Double_t y1,Double_t y2); //Mathienson integral over given limits
db910db9 131
e42a7b46 132 inline static Double_t GainSag(Double_t x,Int_t sector); //gain variations in %
a25b3368 133 static Double_t Gain(const TVector2 &x2){//gives chamber gain in terms of QDC channels for given point in local ref system
134 if(fgIsWireSag) return QdcSlope(Loc2Sec(x2))*(1+GainSag(x2.X(),Loc2Sec(x2))/100);
135 else return QdcSlope(Loc2Sec(x2));}
136 inline static Double_t FracQdc(const TVector2 &x2,const TVector &pad); //charge fraction to pad from hit
db910db9 137 inline static Int_t TotQdc(TVector2 x2,Double_t e ); //total charge for Eloss (GeV) 0 for photons
138 static Double_t QdcSlope(Int_t sec){switch(sec){case -1: return 0; default: return 33;}} //weight of electon in QDC channels
139
140 static inline Int_t Lors2Pad (Double_t x,Double_t y ); //LORS (x,y) [cm] -> abs pad number
141 static Double_t IonPot ( ){return 26.0e-9;} //for CH4 in GeV taken from ????
142 static inline Int_t QdcTot (Int_t iPad,Double_t e ); //total QDC generated by Eloss or Etot [GeV]
143 static inline Double_t QdcSag (Int_t iPad ); //mean QDC variation due to sagita [0,1]
144 static Double_t QdcEle (Int_t iPad ){return fgIsWireSag?33*(1+QdcSag(iPad)):33;} //mean QDC per electron
145 static inline Int_t Hit2SDigs (Int_t iPad, Double_t e,TClonesArray* pSDigLst); //hit->sdigits, returns Qtot
146 static inline Int_t Hit2SDigs (TVector2 hit,Double_t e,TClonesArray* pSDigLst); //hit->sdigits, returns Qtot, old style
147 static void TestHit2SDigs (Double_t x,Double_t y,Double_t e,Bool_t isNew=kFALSE); //test hit->sdigits
148
0fe8fa07 149 inline static Bool_t IsOverTh(Int_t c,TVector pad,Double_t q); //is QDC of the pad registered by FEE
db910db9 150 static Int_t NsigmaTh() {return fgNsigmaTh;} //
e42a7b46 151 static Float_t SigmaThMean() {return fgSigmaThMean;} //QDC electronic noise mean
152 static Float_t SigmaThSpread() {return fgSigmaThSpread;} //QDC electronic noise width
e42a7b46 153
ae754cdf 154 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
ed83829e 155 -2.66575e-3*TMath::Sin(4*TMath::Pi()/PadSizeX()*x)
f770edb5 156 +2.80553e-3*TMath::Sin(6*TMath::Pi()/PadSizeX()*x)+0.0070;}
d0831219 157 static void ReadErrFiles(); //Read Err file parameters
db910db9 158 TVector3 SigmaSinglePhoton(Int_t Npart, Double_t mom, Double_t theta, Double_t phi); //Find Sigma for single photon from momentum and particle id
159 TVector3 SigmaSinglePhoton(Double_t thetaCer, Double_t theta, Double_t phi); //Fing sigma for single photon from thetacer
160 static Double_t Interpolate(Double_t par[4][330],Double_t x, Double_t y, Double_t phi); //Find the error value from interpolation
161
162 TVector3 ForwardTracing(TVector3 entranceTrackPoint,TVector3 vectorTrack, Double_t thetaC, Double_t phiC); //it traces foward a photon from Emission Point to PC
163 static TVector3 PlaneIntersect(const TVector3 &lineDir,const TVector3 &linePoint,const TVector3 &planeNorm,const TVector3 &planePoint); //intersection between line and plane
164 static Double_t SnellAngle(Float_t n1, Float_t n2, Float_t theta1); // Snell law
165 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
166 static Double_t AlphaFeedback(Int_t c,Int_t s) {c++;s++; return 0.02;} //for sector s of chamber c
167//test part
168 static void Test() {TestSeg();TestTrans();TestResp();} //test all groups of methodes
169 static void TestResp(); //test the response group of methodes
170 static void TestSeg(); //test the segmentation group of methodes
171 static void TestTrans(); //test the transform group of methodes
172
068217e3 173 static Double_t fgMass[5]; // mass array
a25b3368 174 static Bool_t fgIsTestBeam; //test beam geometry instead of normal RICH flag
db910db9 175 enum EPlaneId {kCenter,kPc,kRad,kAnod,kNch=7}; //4 planes in chamber and total number of chambers
176protected:
177 AliRICHParam(); //default ctor is protected to enforce it to be singleton
178 static AliRICHParam *fgInstance; //static pointer to instance of AliRICHParam singleton
179//optical curves
180 static Double_t fEckovMin; //min Eckov
181 static Double_t fEckovMax; //max Eckov
182
183 TF2* fIdxC6F14; //n=f(Ephot,T) [GeV] for radiator freon C6F14
184 static TF1 fgIdxSiO2; //n=f(Ephot) [GeV] for window quartz SiO2
185 static TF1 fgIdxCH4; //n=f(Ephot) [GeV] for MWPC amp gas CF4
186 static TF1 fgIdxAir; //n=f(Ephot) [GeV] for air
101624cd 187
db910db9 188 static TF1 fgAbsC6F14; //abs len curve for radiator freon C6F14, cm versus GeV
189 static TF1 fgAbsSiO2; //abs len curve for window quartz SiO2 , cm versus GeV
190 static TF1 fgAbsCH4; //abs len curve for MWPC methane CF4 , cm versus GeV
191 static TF1 fgAbsAir; //abs len curve for air, cm versus GeV
db910db9 192
193 static Bool_t fgIsWireSag; //wire sagitta ON/OFF flag
194 static Bool_t fgIsResolveClusters; //declustering ON/OFF flag
195 static Bool_t fgIsFeedback; //generate feedback photon?
196
197 static Int_t fgHV[6]; //HV applied to anod wires
198 static Int_t fgNsigmaTh; //n. of sigmas to cut for zero suppression
199 static Float_t fgSigmaThMean; //sigma threshold value
200 static Float_t fgSigmaThSpread; //spread of sigma
201
202 static Double_t fgErrChrom[4][330]; //
203 static Double_t fgErrGeom[4][330]; //
204 static Double_t fgErrLoc[4][330]; //Chromatic, Geometric and Localization array to parametrize SigmaCerenkov
205 TGeoHMatrix *fMatrix[kNchambers]; //poiners to matrices defining RICH chambers rotations-translations
206 ClassDef(AliRICHParam,0) //RICH main parameters class
d48cca74 207};
db910db9 208
209AliRICHParam* AliRICHParam::Instance()
210{
211// Return pointer to the AliRICHParam singleton.
212// Arguments: none
213// Returns: pointer to the instance of AliRICHParam or 0 if no geometry
214 if(!fgInstance&&gGeoManager) new AliRICHParam;
215 else if(!gGeoManager) Printf("No geometry imported");
216 return fgInstance;
217}//Instance()
c2c6679b 218//__________________________________________________________________________________________________
c712cb2f 219Int_t AliRICHParam::PadNeighbours(Int_t iPadX,Int_t iPadY,Int_t listX[4],Int_t listY[4])
220{
a25b3368 221//Determines all the neighbouring pads for the given one (iPadX,iPadY). Returns total number of these pads.
222//Dead zones are taken into account, meaning pads from different sector are not taken.
e42a7b46 223// 1
224// 2 3
225// 4
c712cb2f 226 Int_t nPads=0;
e42a7b46 227 if(iPadY!=NpadsY()&&iPadY!=2*NpadsYsec()&&iPadY!=NpadsYsec()){listX[nPads]=iPadX; listY[nPads]=iPadY+1; nPads++;} //1
228 if(iPadX!=1&&iPadX!=NpadsXsec()+1) {listX[nPads]=iPadX-1; listY[nPads]=iPadY; nPads++;} //2
229 if(iPadX!=NpadsXsec()&&iPadX!=NpadsX()) {listX[nPads]=iPadX+1; listY[nPads]=iPadY; nPads++;} //3
230 if(iPadY!=1&&iPadY!=NpadsYsec()+1&&2*NpadsYsec()+1) {listX[nPads]=iPadX; listY[nPads]=iPadY-1; nPads++;} //4
ed3ceb24 231
c712cb2f 232 return nPads;
233}//Pad2ClosePads()
234//__________________________________________________________________________________________________
a25b3368 235Int_t AliRICHParam::Loc2Sec(const TVector2 &v2)
3582c1f9 236{
db910db9 237// Determines sector containing the given point. y ^ 5 6
238// | 3 4
239// | 1 2
240// -------> x
241// Arguments: v2- LORS position [cm]
242// Returns: sector code
243 Double_t x0=0; Double_t x1=SecSizeX(); Double_t x2=SecSizeX()+DeadZone(); Double_t x3=PcSizeX();
244 Double_t y0=0; Double_t y1=SecSizeY(); Double_t y2=SecSizeY()+DeadZone(); Double_t y3=2*SecSizeY()+DeadZone();
245 Double_t y4=PcSizeY()-SecSizeY(); Double_t y5=PcSizeY();
e42a7b46 246
0fe8fa07 247 Int_t sector=-1;
a25b3368 248 if (v2.X() >= x0 && v2.X() <= x1 ) sector=1;
249 else if(v2.X() >= x2 && v2.X() <= x3 ) sector=2;
0fe8fa07 250 else return -1;
3582c1f9 251
a25b3368 252 if (v2.Y() >= y0 && v2.Y() <= y1 ) ; //sectors 1 or 2
253 else if(v2.Y() >= y2 && v2.Y() <= y3 ) sector+=2; //sectors 3 or 4
254 else if(v2.Y() >= y4 && v2.Y() <= y5 ) sector+=4; //sectors 5 or 6
0fe8fa07 255 else return -1;
3582c1f9 256 return sector;
c712cb2f 257}//Loc2Sec(Double_t x, Double_t y)
c2c6679b 258//__________________________________________________________________________________________________
a25b3368 259TVector AliRICHParam::Loc2Pad(const TVector2 &loc)
3582c1f9 260{
a25b3368 261//Determines pad number TVector(padx,pady) containing the given point x2 defined in the chamber RS.
262//Pad count starts in lower left corner from 1,1 to 144,160 in upper right corner of a chamber.
e42a7b46 263//y ^ 5 6
264// | 3 4
265// | 1 2
266// -------> x
267 TVector pad(2);
a25b3368 268 Int_t sec=Loc2Sec(loc);//trasforms x2 to sector reference system
0fe8fa07 269 if(sec==-1) {pad[0]=pad[1]=-1; return pad;}
a25b3368 270//first we deal with x
271 if(sec==1||sec==3||sec==5) pad[0]= Int_t( loc.X() / PadSizeX() )+1; //sector 1 or 3 or 5
272 else pad[0]=NpadsX() - Int_t( (PcSizeX()-loc.X()) / PadSizeX() ) ; //sector 2 or 4 or 6
273//second deal with y
d3eb6079 274 if(sec==1||sec==2) pad[1]=Int_t( loc.Y() / PadSizeY())+1; //sector 1 or 2
db910db9 275 else if(sec==3||sec==4) pad[1]=Int_t( (loc.Y()-SecSizeY()-DeadZone()) / PadSizeY())+NpadsYsec()+1; //sector 3 or 4
d3eb6079 276 else pad[1]=NpadsY() - Int_t( (PcSizeY()-loc.Y()) / PadSizeY()); //sector 5 or 6
e42a7b46 277 return pad;
3582c1f9 278}
db910db9 279//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
280Int_t AliRICHParam::Lors2Pad(Double_t x,Double_t y)
281{
282// Determines abs pad number containing the given point (x,y) defined in the chamber RS.
283// Pad count starts in lower left corner from 1,1 to 144,160 in upper right corner of a chamber.
284// y ^ 5 6
285// | 3 4
286// | 1 2
287// -------> x
288 Int_t padx,pady;
289 if (x>= 0 && x<= SecSizeX() ) padx= 1 + Int_t( x /PadSizeX() ); //sector 1 or 3 or 5
290 else if(x>=SecSizeX()+DeadZone() && x<= PcSizeX() ) padx= NpadsX() - Int_t( (PcSizeX()-x)/PadSizeX() ); //sector 2 or 4 or 6
291 else return -1; //dead zone or out of chamber
292
293
294 if (y>= 0 && y<= SecSizeY() ) pady= 1 + Int_t( y /PadSizeY() ); //sector 1 or 2
295 else if(y>=SecSizeY()+DeadZone() && y<=2*SecSizeY()+DeadZone() ) pady= 1 + NpadsYsec() + Int_t( (y-SecSizeY()-DeadZone()) / PadSizeY()); //sector 3 or 4
296 else if(y>= PcSizeY()-SecSizeY() && y<= PcSizeY() ) pady= NpadsY() - Int_t( (PcSizeY()-y)/PadSizeY() ); //sector 5 or 6
297 else return -1; //dead zone or out of chamber
298
299 return AliRICHDigit::P2A(0,padx,pady);
300}//Lors2Pad()
301//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
998b831f 302Int_t AliRICHParam::Pad2Sec(const TVector &pad)
3582c1f9 303{
a25b3368 304//Determines sector containing the given pad.
0fe8fa07 305 Int_t sector=-1;
e42a7b46 306 if (pad[0] >= 1 && pad[0] <= NpadsXsec() ) {sector=1;}
307 else if(pad[0] > NpadsXsec() && pad[0] <= NpadsX() ) {sector=2;}
998b831f 308 else AliDebugClass(1,Form("Wrong pad (%3.0f,%3.0f)",pad[0],pad[1]));
e42a7b46 309
310 if (pad[1] >= 1 && pad[1] <= NpadsYsec() ) {}
311 else if(pad[1] > NpadsYsec() && pad[1] <= 2*NpadsYsec() ) {sector+=2;}
312 else if(pad[1] > 2*NpadsYsec() && pad[1] <= NpadsY() ) {sector+=4;}
998b831f 313 else AliDebugClass(1,Form("Wrong pad (%3.0f,%3.0f)",pad[0],pad[1]));
c712cb2f 314
e42a7b46 315 return sector;
c712cb2f 316}//Pad2Sec()
db910db9 317//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
e42a7b46 318TVector2 AliRICHParam::Pad2Loc(TVector pad)
c712cb2f 319{
a25b3368 320//Returns position of the center of the given pad in local system of the chamber (cm)
e42a7b46 321// y ^ 5 6
998b831f 322// | 3 4 sector numbers
e42a7b46 323// | 1 2
324// -------> x
0fe8fa07 325 Double_t x=-1,y=-1;
e42a7b46 326 if(pad[0] > 0 && pad[0] <= NpadsXsec())//it's 1 or 3 or 5
327 x=(pad[0]-0.5)*PadSizeX();
328 else if(pad[0] > NpadsXsec() && pad[0] <= NpadsX())//it's 2 or 4 or 6
329 x=(pad[0]-0.5)*PadSizeX()+DeadZone();
c2c6679b 330 else
998b831f 331 AliDebugClass(1,Form("Wrong pad (%3.0f,%3.0f)",pad[0],pad[1]));
e42a7b46 332
333 if(pad[1] > 0 && pad[1] <= NpadsYsec())//it's 1 or 2
334 y=(pad[1]-0.5)*PadSizeY();
335 else if(pad[1] > NpadsYsec() && pad[1] <= 2*NpadsYsec())//it's 3 or 4
336 y=(pad[1]-0.5)*PadSizeY()+DeadZone();
337 else if(pad[1] > 2*NpadsYsec() && pad[1]<= NpadsY())//it's 5 or 6
338 y=(pad[1]-0.5)*PadSizeY()+2*DeadZone();
339 else
998b831f 340 AliDebugClass(1,Form("Wrong pad (%3.0f,%3.0f)",pad[0],pad[1]));
e42a7b46 341
3582c1f9 342 return TVector2(x,y);
343}
db910db9 344//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
0422a446 345TVector2 AliRICHParam::Pad2Loc(Int_t pad)
346{
db910db9 347// Converts absolute pad number to local position in LORS
348// LORS is a chamber reference system with origin in left-down coner looking from IP
349// Arguments: pad- absolute pad number
350// Returns: pad center position as TVector2 in PCRS
0422a446 351 TVector2 pos;
352 pos.Set((Pad2PadX(pad)-0.5)*PadSizeX() , (Pad2PadY(pad)-0.5)*PadSizeY());//set to sector LORS
353 return pos;
354}
db910db9 355//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
e42a7b46 356Double_t AliRICHParam::GainSag(Double_t x,Int_t sector)
c60862bf 357{
a25b3368 358//Returns % of gain variation due to wire sagita.
359//All curves are parametrized as per sector basis, so x must be apriory transformed to the Sector RS.
360//Here x is a distance along wires.
db910db9 361 x-=SecSizeX()/2;
362 if(x>SecSizeX()) x-=SecSizeX();
3582c1f9 363 switch(HV(sector)){
e42a7b46 364 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;//%
365 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;
366 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;
367 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;
3582c1f9 368 default: return 0;
369 }
c712cb2f 370}
db910db9 371//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
372Double_t AliRICHParam::QdcSag(Int_t iPad)
373{
374// It was observed at BNL that wires are affected by gravitation field providing a significant sagita leading to the local electric field variation
375// which means that different pads produce different signals.
376// Arguments: iPad- absolute pad number
377// Returns: gain variation due to wire sagita 0 < QdcSag < 1.
378// Curves are parametrised in terms of distance x (cm) along wires having 0 on the left edge of the photocathode
379 Double_t x=AliRICHDigit::P2X(iPad)*PadSizeX()-0.5*PadSizeX(); //center of the padx (count from 1)
380 switch(HV(iPad)){
381 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
382 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);
383 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);
384 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);
385 default: return 0;
386 }
387}//QdcSag()
388//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
389Int_t AliRICHParam::QdcTot(Int_t iPad,Double_t e)
390{
391// Calculates the total charge produced by the hit. Method:
392// 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)
393// 2. each electron imposes a charge distributed as Poisson with QdcEle() mean. Different pads produce different means. See QdcEle().
394// Arguments: iPad- absolute pad number contaning the hit;
395// e- Eloss for mip in amplification gas or Etot for photon
396// Returns: charge parametrised in QDC channels.
397 Int_t iNele=Int_t(e/IonPot()); if(iNele==0) iNele=1;//e < ion. pot. means it's photoelectron
398 Double_t dQdc=0;
399 for(Int_t i=1;i<=iNele;i++) dQdc+=-QdcEle(iPad)*TMath::Log(gRandom->Rndm());
400 return Int_t(dQdc);
401}//QdcTot()
402//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
3582c1f9 403Int_t AliRICHParam::TotQdc(TVector2 x2,Double_t eloss)
404{
a25b3368 405//Calculates the total charge produced by the eloss in point x2 (Chamber RS).
406//Returns this change parametrised in QDC channels, or 0 if the hit in the dead zone.
407//eloss=0 means photon which produces 1 electron only eloss > 0 for Mip
0fe8fa07 408 if(Loc2Sec(x2)==-1) return 0; //hit in the dead zone
3582c1f9 409 Int_t iNelectrons=Int_t(eloss/IonisationPotential()); if(iNelectrons==0) iNelectrons=1;
410 Double_t qdc=0;
411 for(Int_t i=1;i<=iNelectrons;i++) qdc+=-Gain(x2)*TMath::Log(gRandom->Rndm());
412 return Int_t(qdc);
413}
db910db9 414//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
a25b3368 415Double_t AliRICHParam::FracQdc(const TVector2 &x2,const TVector &pad)
3582c1f9 416{
a25b3368 417//Calculates the charge fraction induced to given pad by the hit from the given point.
418//Integrated Mathieson distribution is used.
e42a7b46 419 TVector2 center2=Pad2Loc(pad);//gives center of requested pad
998b831f 420 Double_t normXmin=(x2.X()-center2.X()-PadSizeX()/2) /Pc2Cath();//parametrise for Mathienson
421 Double_t normXmax=(x2.X()-center2.X()+PadSizeX()/2) /Pc2Cath();
422 Double_t normYmin=(x2.Y()-center2.Y()-PadSizeY()/2) /Pc2Cath();
423 Double_t normYmax=(x2.Y()-center2.Y()+PadSizeY()/2) /Pc2Cath();
424
425//requested pad might not belong to the sector of the given hit position, hence the check:
426 return (Loc2Sec(x2)!=Pad2Sec(pad)) ? 0:Mathieson(normXmin, normYmin, normXmax, normYmax);
3582c1f9 427}
db910db9 428//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
0422a446 429Double_t AliRICHParam::Mathieson(Double_t x1,Double_t y1,Double_t x2,Double_t y2)
3582c1f9 430{
db910db9 431// This is the answer to electrostatic problem of charge distrubution in MWPC described elsewhere. (NIM A370(1988)602-603)
432// Arguments: x1- diff between center of distribution which is a hit position and left edge of interested pad divided by anod-cathode distance
433// x2- right edge of the pad
434// y1- up edge of the pad
435// y2- bottom edge of the pad
436// Returns: a charge fraction [0-1] imposed into the pad
53fd478b 437 const Double_t kSqrtKx3=0.77459667;const Double_t kX2=0.962;const Double_t kX4=0.379;
438 const Double_t kSqrtKy3=0.77459667;const Double_t kY2=0.962;const Double_t kY4=0.379;
c712cb2f 439
0422a446 440 Double_t ux1=kSqrtKx3*TMath::TanH(kX2*x1);
441 Double_t ux2=kSqrtKx3*TMath::TanH(kX2*x2);
442 Double_t uy1=kSqrtKy3*TMath::TanH(kY2*y1);
443 Double_t uy2=kSqrtKy3*TMath::TanH(kY2*y2);
53fd478b 444 return 4*kX4*(TMath::ATan(ux2)-TMath::ATan(ux1))*kY4*(TMath::ATan(uy2)-TMath::ATan(uy1));
0422a446 445}
db910db9 446//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
a25b3368 447TVector AliRICHParam::Loc2Area(const TVector2 &x2)
3582c1f9 448{
db910db9 449// Calculates the area of disintegration for a given point. It's assumed here that this points lays on anode wire.
450// Area is a rectangulare set of pads defined by its left-down and right-up coners.
e42a7b46 451 TVector area(4);
452 TVector pad=Loc2Pad(x2);
453 area[0]=area[2]=pad[0]; area[1]=area[3]=pad[1];//area is just a pad fired
454 if(pad[0]!=1 && pad[0]!= NpadsXsec()+1 ) area[0]--; //left down coner X
455 if(pad[1]!=1 && pad[1]!= NpadsYsec()+1 && pad[1]!= 2*NpadsYsec()+1) area[1]--; //left down coner Y
456 if(pad[0]!=NpadsXsec() && pad[0]!= NpadsX() ) area[2]++; //right up coner X
457 if(pad[1]!=NpadsYsec() && pad[1]!= 2*NpadsYsec() && pad[1]!= NpadsY() ) area[3]++; //right up coner Y
458 return area;
3582c1f9 459}
db910db9 460//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
461Bool_t AliRICHParam::IsOverTh(Int_t ,TVector ,Double_t qdc)
3582c1f9 462{
db910db9 463// Checks if the current QDC is over threshold and FEE will save this value to data concentrator.
464// This is done on pad by pad level, so the pad pedestal map is to be used. ??????????????
465// Arguments:
466// Returns: true if QDC over treshold
467 return (qdc>NsigmaTh()*(SigmaThMean()+(1.-2*gRandom->Rndm())*SigmaThSpread())); //??????????? to be change to real values
3582c1f9 468}
db910db9 469//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
470TGeoMatrix* AliRICHParam::Matrix(Int_t iChamN,Int_t iPlane)
471{
472 TGeoHMatrix *pMatrix=new TGeoHMatrix;
473
474 const Double_t kAngHor=19.5; // horizontal angle between chambers 19.5 grad
475 const Double_t kAngVer=20; // vertical angle between chambers 20 grad
476 const Double_t kAngCom=30; // common RICH rotation with respect to x axis 30 grad
477
478 pMatrix->RotateY(90); //rotate around y since initial position is in XY plane -> now in YZ plane
479 Double_t trans[3]={490,0,0}; //center of the chamber is on window-gap surface
480
481 switch(iPlane){
482 case kCenter: break;
483 case kPc : trans[0]+=PcZ(); break;
484 case kRad : trans[0]+=RadZ(); break;
485 case kAnod : trans[0]+=AnodZ(); break;
486 default: return 0; break;
487 }
488 pMatrix->SetTranslation(trans); //now plane in YZ is shifted along x
489
490 switch(iChamN){
491 case 1: pMatrix->RotateY(kAngHor); pMatrix->RotateZ(-kAngVer); break; //right and down
492 case 2: pMatrix->RotateZ(-kAngVer); break; //down
493 case 3: pMatrix->RotateY(kAngHor); break; //right
494 case 4: break; //no rotation
495 case 5: pMatrix->RotateY(-kAngHor); break; //left
496 case 6: pMatrix->RotateZ(kAngVer); break; //up
497 case 7: pMatrix->RotateY(-kAngHor); pMatrix->RotateZ(kAngVer); break; //left and up
498 default: return 0; break;
499 }//switch(iChamber)
500 pMatrix->RotateZ(kAngCom); //apply common rotation in XY plane
501 return pMatrix;
502}//Matrix()
503//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
504TVector3 AliRICHParam::Lors2Mars(Int_t iChId,Double_t x,Double_t y,Int_t iPlnId)
505{
506// Trasform from LORS to MARS
507// Arguments: iChId - chamber code 1..7
508// x,y - point in LORS
509// iPlnN - chamber plane code might be kPc kRad kCenter kAnod
510 Double_t z=0;
511 switch(iPlnId){
512 case kPc : z=PcZ() ; break;
513 case kAnod : z=AnodZ(); break;
514 case kCenter: z=0 ; break;
515 case kRad : z=RadZ() ; break;
516 }
517 Double_t lors[3]={x-0.5*PcSizeX(),y-0.5*PcSizeY(),z}, mars[3];
518 fMatrix[iChId-1]->LocalToMaster(lors,mars);
519 return TVector3(mars);
520}
521//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
522TVector2 AliRICHParam::Mars2Lors(Int_t iChId,const TVector3 &x,Int_t iPlnId)
523{
524// Trasform from MARS to LORS
525// Arguments: iChId - chamber code 1..7
526// mars - point in MARS
527// iPlnN - chamber plane code might be kPc kRad kCenter kAnod
528 Double_t z=0;
529 switch(iPlnId){
530 case kPc : z=PcZ() ; break;
531 case kAnod : z=AnodZ(); break;
532 case kCenter: z=0 ; break;
533 case kRad : z=RadZ() ; break;
534 }
535 Double_t lors[3],mars[3];
536 x.GetXYZ(mars);
537 fMatrix[iChId-1]->MasterToLocal(mars,lors);
538 return TVector2(lors[0]+0.5*PcSizeX(),lors[1]+0.5*PcSizeY());
539}
540//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
541TVector3 AliRICHParam::Lors2MarsOld(Int_t iChId,Double_t x,Double_t y,Int_t iPlnId)
542{
543// Trasform from LORS to MARS
544// Arguments: iChId - chamber code 0..6
545// x,y - point in LORS
546// iPlnN - chamber plane code might be kPc kRad kCenter kAnod
547 TGeoMatrix *pMatrix=Matrix(iChId,iPlnId);
548 Double_t lors[3]={x-0.5*PcSizeX(),y-0.5*PcSizeY(),0}, mars[3]; pMatrix->LocalToMaster(lors,mars); delete pMatrix;
549 return TVector3(mars);
550}
551//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
552TVector2 AliRICHParam::Mars2LorsOld(Int_t iChamN,const TVector3 &x,Int_t iPlaneN)
553{
554 TGeoMatrix *pMatrix=Matrix(iChamN,iPlaneN);
555 Double_t mars[3]={x.X(),x.Y(),x.Z()} , lors[3]; pMatrix->MasterToLocal(mars,lors); delete pMatrix;
556 return TVector2(lors[0]+0.5*PcSizeX(),lors[1]+0.5*PcSizeY());
557}
558//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
559TVector3 AliRICHParam::Mars2LorsVec(Int_t iChamN,const TVector3 &x)
560{
561 TGeoMatrix *pMatrix=Matrix(iChamN,kPc);
562 Double_t mars[3]={x.X(),x.Y(),x.Z()} , lors[3]; pMatrix->MasterToLocalVect(mars,lors); delete pMatrix;
563 return TVector3(lors);
564}
565//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
566TVector3 AliRICHParam::Center(Int_t iChamN,Int_t iPlaneN)
567{
568 TGeoMatrix *pMatrix=Matrix(iChamN,iPlaneN);
569 Double_t mars[3] , lors[3]={0,0,0}; pMatrix->LocalToMaster(lors,mars); delete pMatrix;
570 return TVector3(mars);
571}
572//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
573TVector3 AliRICHParam::Norm(Int_t iChamN)
574{
575 TGeoMatrix *pMatrix=Matrix(iChamN,kPc);
576 Double_t mars[3] , lors[3]={0,0,1}; pMatrix->LocalToMasterVect(lors,mars); delete pMatrix;
577 return TVector3(mars);
578}
579//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
580Int_t AliRICHParam::Hit2SDigs(Int_t iHitPad,Double_t e,TClonesArray *pSDigLst)
581{
582// Determines a number of pads affected by the hit and calculates the charge induced to each pad.
583// Integrated Mathieson distribution is used. Invoked from AliRICHvX::Hits2SDigits()
584// Arguments: iHitPad - hit pad absolute number
585// e - energy (GeV) of this hit (Eloss for mip or Etot for photon)
586// pSDigLst - pointer to clones array to store in calculated sdigits
587// Returns: total QDC for this hit
588 Int_t iQtot=QdcTot(iHitPad,e); //total QDC value collected for this hit
589 Int_t a=1; //analise current pad +- a pads in both directions
590 Int_t iLeftX=0,iBotY=0,iRightX=0,iTopY=0; //area of disintegration for cluster formation, shifts to hit pad, not pad numbers
591 if(AliRICHDigit::P2X(iHitPad) > a) iLeftX =-a;//determine area of disintegration as hit pad +- parametrised number
592 if(AliRICHDigit::P2X(iHitPad) < AliRICHDigit::kPadsSecX-a) iRightX= a;//of pads. this number is determined by5 sigmas of Mathieson shape
593 if(AliRICHDigit::P2Y(iHitPad) > a) iBotY =-a;//see RICH TDR page 29
594 if(AliRICHDigit::P2Y(iHitPad) < AliRICHDigit::kPadsSecY-a) iTopY = a;//also boundary conditions are checked (edge of sector aka PC)
595 Int_t iPadsCnt=0;
596 for(Int_t iShiftX=iLeftX;iShiftX<=iRightX;iShiftX++){//affected pads loop iShiftX is a distance (in pads) between hit pad and pad under analisys
597 for(Int_t iShiftY=iBotY;iShiftY<=iTopY;iShiftY++){//affected pads loop
598 iHitPad+=AliRICHDigit::kPadAbsX*iShiftX+iShiftY;
599 Double_t x1=PadSizeX()/Pc2Cath()*(iShiftX-0.5);//parametrise for Mathienson
600 Double_t x2=PadSizeX()/Pc2Cath()*(iShiftX+0.5);//parametrise for Mathienson
601 Double_t y1=PadSizeY()/Pc2Cath()*(iShiftY-0.5);//parametrise for Mathienson
602 Double_t y2=PadSizeY()/Pc2Cath()*(iShiftY+0.5);//parametrise for Mathienson
603 (*pSDigLst)[iPadsCnt++]= new AliRICHDigit(iHitPad,iQtot*Mathieson(x1,y1,x2,y2));
604 }//Y loop
605 }//X loop
606 return iQtot;
607}//Hit2SDigs() for abs pad
608//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
609Int_t AliRICHParam::Hit2SDigs(TVector2 hitX2,Double_t e,TClonesArray *pSDigLst)
610{
611// Determines a number of pads affected by the hit and calculates the charge induced to each pad.
612// Integrated Mathieson distribution is used. Invoked from AliRICHvX::Hits2SDigits()
613// Arguments: hitX2 - hit position in LORS, cm
614// e - energy (GeV) of this hit (Eloss for mip or Etot for photon)
615// pSDigLst - pointer to clones array to store in calculated sdigits
616// Returns: total QDC for this hit
617 Int_t iQtot=TotQdc(hitX2,e);//total charge produced by hit, 0 if hit in dead zone
618 if(iQtot==0) return 0;
619
620 TVector hitPad=Loc2Pad(hitX2); TVector2 padCenterX2=Pad2Loc(hitPad); //shift the hit position to the nearest anod wire
621 TVector2 anod;
622 if((hitX2.Y()-padCenterX2.Y())>0) anod.Set(hitX2.X(),padCenterX2.Y()+AnodPitch()/2); //upper part of the pad: shift to upper anod wire
623 else anod.Set(hitX2.X(),padCenterX2.Y()-AnodPitch()/2); //lower part of the pad: shift to lower anod wire
624
625 TVector area=Loc2Area(anod);//determine affected pads, dead zones analysed inside
626 TVector pad(2); //current pad
627 Int_t iPadsCnt=0;
628 for(pad[1]=area[1];pad[1]<=area[3];pad[1]++){//affected pads loop
629 for(pad[0]=area[0];pad[0]<=area[2];pad[0]++){
630 Double_t dQpad=iQtot*FracQdc(anod,pad);
631 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
632 }//X loop
633 }//Y loop
634 return iQtot;
635}//Hit2SDigs() for TVector2
636//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
637TVector3 AliRICHParam::SigmaSinglePhotonFormula(Double_t thetaCer, Double_t phiCer, Double_t theta, Double_t phi, Double_t beta)
638{
639 TVector3 v(-999,-999,-999);
640
641 v.SetX(AliRICHParam::ErrLoc(thetaCer,phiCer,theta,phi,beta));
642 v.SetY(AliRICHParam::ErrGeom(thetaCer,phiCer,theta,phi,beta));
643 v.SetZ(AliRICHParam::ErrCrom(thetaCer,phiCer,theta,phi,beta));
644
645 return v;
646}
647//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
648Double_t AliRICHParam::ErrLoc(Double_t thetaC, Double_t phiC, Double_t Ptheta, Double_t Pphi, Double_t beta)
649{
650//par->RefIdxC6F14(par->MeanCkovEnergy())
651//(Float_t)1.29337525367736816e+00
652Double_t RefC6F14m = 1.29337;
653 Double_t Hgap = Pc2Win();
654 Double_t dphi = phiC - Pphi;
655
656 Double_t alpha =TMath::Cos(Ptheta)-TMath::Tan(thetaC)*TMath::Cos(dphi)*TMath::Sin(Ptheta);
657 Double_t k = 1.-RefC6F14m*RefC6F14m+alpha*alpha/(beta*beta);
658
659 Double_t mu = TMath::Sin(Ptheta)*TMath::Sin(Pphi) + TMath::Tan(thetaC)*(TMath::Cos(Ptheta)*TMath::Cos(dphi)*TMath::Sin(Pphi)
660+ TMath::Sin(dphi)*TMath::Cos(Pphi));
661
662 Double_t e = TMath::Sin(Ptheta)*TMath::Cos(Pphi)+TMath::Tan(thetaC)*(TMath::Cos(Ptheta)*TMath::Cos(dphi)*TMath::Cos(Pphi) -TMath::Sin(dphi)*TMath::Sin(Pphi));
663
664 Double_t kk = beta*TMath::Sqrt(k)/(Hgap*alpha);
665 Double_t dtdxc = kk*(k*(TMath::Cos(dphi)*TMath::Cos(Pphi) - TMath::Cos(Ptheta)*TMath::Sin(dphi)*TMath::Sin(Pphi)) - ( alpha*
666 mu/(beta*beta) )*TMath::Sin(Ptheta)*TMath::Sin(dphi));
667
668 Double_t dtdyc = kk*(k*(TMath::Cos(dphi)*TMath::Sin(Pphi) + TMath::Cos(Ptheta)*TMath::Sin(dphi)*TMath::Cos(Pphi)) + ( alpha*
669 e/(beta*beta) )* TMath::Sin(Ptheta)*TMath::Sin(dphi));
670
671 return TMath::Sqrt(0.2*0.2*dtdxc*dtdxc + 0.25*0.25*dtdyc*dtdyc);
672}
673
674Double_t AliRICHParam::ErrCrom(Double_t thetaC, Double_t phiC, Double_t Ptheta, Double_t Pphi, Double_t beta)
675{
676 Double_t dphi = phiC - Pphi;
677 Double_t RefC6F14m = 1.29337;
678 Double_t alpha =TMath::Cos(Ptheta)-TMath::Tan(thetaC)*TMath::Cos(dphi)*TMath::Sin(Ptheta);
679
680 Double_t dtdn = TMath::Cos(Ptheta)*RefC6F14m*beta*beta/(alpha*TMath::Tan(thetaC));
681
682 Double_t f = 0.00928*(7.75-5.635)/TMath::Sqrt(12.);
683
684 return f*dtdn;
685}
686//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
687Double_t AliRICHParam::ErrGeom(Double_t thetaC, Double_t phiC, Double_t Ptheta, Double_t Pphi, Double_t beta )
688{
689
690 Double_t Tr = RadThick();
691 Double_t Xep = 0.5*Tr;
692
693 Double_t dphi = phiC - Pphi;
694 Double_t RefC6F14m = 1.29337;
695 Double_t alpha =TMath::Cos(Ptheta)-TMath::Tan(thetaC)*TMath::Cos(dphi)*TMath::Sin(Ptheta);
696
697 Double_t k = 1.-RefC6F14m*RefC6F14m+alpha*alpha/(beta*beta);
698
699 Double_t Hgap = Pc2Win();
700
701
702 Double_t eTr = (Tr - Xep)*beta*TMath::Sqrt(k)/(Hgap*alpha);
703 Double_t lambda = 1.-TMath::Sin(Ptheta)*TMath::Sin(Ptheta)*TMath::Sin(phiC)*TMath::Sin(phiC);
704
705 Double_t c = 1./(1.+ eTr*k/(alpha*alpha*TMath::Cos(thetaC)*TMath::Cos(thetaC)));
706 Double_t I = beta*TMath::Tan(thetaC)*lambda*TMath::Power(k,1.5);
707 Double_t II = 1.+eTr*beta*I;
708
709 Double_t err = c * (I/(alpha*alpha*Hgap) + II* (1.-lambda) / ( alpha*alpha*Hgap*beta*(1.+eTr)) );
710 Double_t TrErr = Tr/(TMath::Sqrt(12.)*TMath::Cos(Ptheta));
711
712 return TrErr*err;
713}//ErrGeom()
714
d48cca74 715#endif //AliRICHParam_h