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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> |
84093f6f | 9 | #include <Riostream.h> //---------to be deleted------------- |
998b831f | 10 | #include <TRandom.h> |
db910db9 | 11 | #include <TClonesArray.h> //Hit2SDigs() |
998b831f | 12 | #include <AliLog.h> |
db910db9 | 13 | #include <TGeoMatrix.h> //Mars2Lors() Lors2Mars() |
14 | #include <TF1.h> //fields | |
15 | #include <TF2.h> //fields | |
16 | #include "AliRICHDigit.h" //Hit2Sdigs() | |
17 | #include <TGeoManager.h> //Instance() | |
998b831f | 18 | |
e42a7b46 | 19 | static const int kNchambers=7; //number of RICH chambers |
20 | static const int kNpadsX = 160; //number of pads along X in single chamber | |
21 | static const int kNpadsY = 144; //number of pads along Y in single chamber | |
e42a7b46 | 22 | static const int kNsectors=6; //number of sectors per chamber |
ed3ceb24 | 23 | |
ed3ceb24 | 24 | static const int kCerenkov=50000050; //??? go to something more general like TPDGCode |
25 | static const int kFeedback=50000051; //??? go to something more general like TPDGCode | |
26 | ||
ae754cdf | 27 | // Class providing all the needed parametrised information |
28 | // to construct the geometry, to define segmentation and to provide response model | |
29 | // In future will also provide all the staff needed for alignment and calibration | |
30 | ||
31 | ||
db910db9 | 32 | class AliRICHParam :public TNamed |
d48cca74 | 33 | { |
34 | public: | |
a25b3368 | 35 | //ctor&dtor |
db910db9 | 36 | virtual ~AliRICHParam() {delete fIdxC6F14;fgInstance=0;} |
a25b3368 | 37 | //test methodes |
c4a03891 | 38 | void Print(Option_t *opt="") const; //print current parametrization |
d3eb6079 | 39 | static void DrawAxis(); |
40 | static void DrawSectors(); | |
a25b3368 | 41 | //flags staff |
db910db9 | 42 | static inline AliRICHParam* Instance(); //pointer to AliRICHParam singleton |
db910db9 | 43 | static Int_t Stack(Int_t evt=-1,Int_t tid=-1); //Print stack info for event and tid |
44 | static Int_t StackCount(Int_t pid,Int_t evt); //Counts stack particles of given sort in given event | |
45 | static inline Double_t ErrLoc (Double_t thetaC,Double_t phiC,Double_t thetaT,Double_t phiT,Double_t beta); | |
46 | static inline Double_t ErrGeom (Double_t thetaC,Double_t phiC,Double_t thetaT,Double_t phiT,Double_t beta); | |
47 | static inline Double_t ErrCrom (Double_t thetaC,Double_t phiC,Double_t thetaT,Double_t phiT,Double_t beta); | |
cb801d41 | 48 | static inline Double_t SigmaSinglePhotonFormula(Double_t thetaC,Double_t phiC,Double_t thetaT,Double_t phiT,Double_t beta); |
a25b3368 | 49 | //Geometrical properties |
db910db9 | 50 | static Int_t NpadsX () {return kNpadsX;} //number of pads along X in chamber |
51 | static Int_t NpadsY () {return kNpadsY;} //number of pads along Y in chamber | |
52 | static Int_t NpadsXsec () {return NpadsX()/2;} //number of pads along X in sector | |
53 | static Int_t NpadsYsec () {return NpadsY()/3;} //number of pads along Y in sector | |
54 | ||
55 | static Double_t AnodPitch () {return PadSizeY()/2;} //cm between anode wires | |
56 | static Double_t AnodZ () {return 7.806;} //Z positon of anod plane in LORS of the chamber, [cm] | |
57 | static Double_t CathPitch () {return PadSizeY()/4;} //dist between cathode wires [cm] | |
58 | static Double_t CollPitch () {return 0.5;} //dist between collection wires [cm] | |
59 | static Double_t DeadZone () {return 2.6;} //dead zone thickness [cm] | |
60 | static Double_t PadSizeX () {return 0.8;} //pad size x [cm] | |
61 | static Double_t PadSizeY () {return 0.84;} //pad size y [cm] | |
62 | static Double_t PcSizeX () {return NpadsX()*PadSizeX()+DeadZone();} //PC size x [cm] | |
63 | static Double_t PcSizeY () {return NpadsY()*PadSizeY()+2*DeadZone();} //PC size y [cm] | |
64 | static Double_t Pc2Cath () {return 0.445;} //dist between PC entrance plane and cathode wires plane [cm] | |
65 | static Double_t Pc2Win () {return PcZ();} //dist between PC entrance plane and window exit plane [cm] | |
66 | static Double_t PcZ () {return 8.0; } //Z positon of PC entrance plane in LORS of the chamber [cm] | |
67 | static Double_t RadThick () {return 1.5;} //radiator thickness [cm] | |
68 | static Double_t RadZ () {return -2.0; } //Z positon of radiator entrance plane in LORS of the chamber [cm] | |
69 | static Double_t SecSizeX () {return NpadsX()*PadSizeX()/2;} //sector size x [cm] | |
70 | static Double_t SecSizeY () {return NpadsY()*PadSizeY()/3;} //sector size y [cm ] | |
71 | static Double_t WinThick () {return 0.5;} //radiator window thickness [cm] | |
72 | ||
73 | ||
0422a446 | 74 | //trasformation methodes |
db910db9 | 75 | 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 |
cb801d41 | 76 | inline TVector3 Lors2MarsVec (Int_t c,const TVector3 &p ); //LORS->MARS transform of vector for chamber c |
db910db9 | 77 | 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 |
cb801d41 | 78 | inline TVector3 Mars2LorsVec (Int_t c,const TVector3 &p ); //MARS->LORS transform of vector for chamber c |
db910db9 | 79 | |
80 | 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 | |
81 | 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 | |
db910db9 | 82 | static inline TVector3 Center (Int_t c,Int_t p ); //Center of plane p of chamber c in MARS (cm) |
83 | static inline TVector3 Norm (Int_t c ); //Norm vector to the chamber c in MARS (cm) | |
84 | static inline TGeoMatrix*Matrix (Int_t iCh, Int_t iPlane ); //TGeoMatrix for the given chamber plain | |
85 | ||
0422a446 | 86 | static Int_t Pad2Cha (Int_t pad ){return pad/100000000; }//abs pad -> chamber |
87 | static Int_t Pad2Sec (Int_t pad ){return pad%100000000/1000000; }//abs pad -> sector | |
88 | static Int_t Pad2PadX (Int_t pad ){return pad%1000000/1000; }//abs pad -> pad x | |
89 | static Int_t Pad2PadY (Int_t pad ){return pad%1000000%100; }//abs pad -> pad y | |
90 | 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 | |
91 | static inline TVector2 Pad2Loc (Int_t pad ); //abs pad ->LORS | |
92 | static inline TVector2 Pad2Loc (TVector pad ); //pad -> LORS returns center of the pad | |
93 | 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) | |
94 | static inline TVector Loc2Area (const TVector2 &x2 ); //pads area affected by hit x2. area is LeftDown-RightUp pad numbers | |
95 | static inline Int_t Loc2Sec (const TVector2 &x2 ); //LORS -> sector | |
96 | static Int_t Loc2Sec (Double_t x,Double_t y ){return Loc2Sec(TVector2(x,y));} //LORS -> sector | |
97 | static inline TVector Loc2Pad (const TVector2 &x2 ); //LORS -> pad | |
98 | static TVector Loc2Pad (Double_t x,Double_t y ){return Loc2Pad(TVector2(x,y));} //LORS -> pad | |
99 | static inline Int_t Pad2Sec (const TVector &pad ); //pad -> sector | |
100 | static inline Int_t PadNeighbours (Int_t iPadX,Int_t iPadY,Int_t aListX[4],Int_t aListY[4]); //pad -> list of it neighbours | |
101 | static Bool_t IsAccepted (const TVector2 &x2 ){return ( x2.X()>=0 && x2.X()<=PcSizeX() && x2.Y()>=0 && x2.Y()<=PcSizeY() ) ? kTRUE:kFALSE;} | |
102 | //optical properties methodes | |
db910db9 | 103 | static Float_t EckovMean ( ){return 6.766e-9;} //mean Ckov energy according to the total trasmission curve |
cb801d41 | 104 | static Float_t EckovMin ( ){return 5.5e-9;} //min photon energy [GeV] defined in optical curves |
105 | static Float_t EckovMax ( ){return 8.5e-9;} //min photon energy [GeV] defined in optical curves | |
db910db9 | 106 | |
107 | Float_t IdxC6F14 (Float_t gev ){return fIdxC6F14->Eval(gev,fIdxC6F14->GetUniqueID());} //n=f(Eckov) [GeV] for C6H14 used as radiator | |
cb801d41 | 108 | 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 |
109 | 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 | |
110 | static Float_t AbsCH4 (Float_t gev ); //abs len=f(Eckov) [GeV] for CF4 | |
db910db9 | 111 | |
112 | void CdbRead (Int_t run,Int_t version ); //read all calibration information for requested run | |
e42a7b46 | 113 | |
e42a7b46 | 114 | static Double_t IonisationPotential() {return 26.0e-9;} //for CH4 in GeV taken from ???? |
115 | static TVector2 MathiesonDelta() {return TVector2(5*0.18,5*0.18);} //area of 5 sigmas of Mathieson distribution (cm) | |
116 | static Int_t MaxQdc() {return 4095;} //QDC number of channels | |
fab9e039 | 117 | |
db910db9 | 118 | |
fab9e039 | 119 | static Int_t QthMIP() {return 100;} |
120 | static Double_t DmatchMIP() {return 1.;} | |
121 | static Double_t PmodMax() {return 6.5;} | |
cb801d41 | 122 | static Int_t HV(Int_t sector) {if (sector>=1 && sector <=6) return 2050; else return -1;} //high voltage for this sector |
a25b3368 | 123 | //charge response methodes |
124 | inline static Double_t Mathieson(Double_t x1,Double_t x2,Double_t y1,Double_t y2); //Mathienson integral over given limits | |
db910db9 | 125 | |
e42a7b46 | 126 | inline static Double_t GainSag(Double_t x,Int_t sector); //gain variations in % |
cb801d41 | 127 | 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 |
128 | if(isSag) return QdcSlope(Loc2Sec(x2))*(1+GainSag(x2.X(),Loc2Sec(x2))/100); | |
129 | else return QdcSlope(Loc2Sec(x2));} | |
a25b3368 | 130 | inline static Double_t FracQdc(const TVector2 &x2,const TVector &pad); //charge fraction to pad from hit |
db910db9 | 131 | inline static Int_t TotQdc(TVector2 x2,Double_t e ); //total charge for Eloss (GeV) 0 for photons |
132 | static Double_t QdcSlope(Int_t sec){switch(sec){case -1: return 0; default: return 33;}} //weight of electon in QDC channels | |
133 | ||
134 | static inline Int_t Lors2Pad (Double_t x,Double_t y ); //LORS (x,y) [cm] -> abs pad number | |
135 | static Double_t IonPot ( ){return 26.0e-9;} //for CH4 in GeV taken from ???? | |
136 | static inline Int_t QdcTot (Int_t iPad,Double_t e ); //total QDC generated by Eloss or Etot [GeV] | |
137 | static inline Double_t QdcSag (Int_t iPad ); //mean QDC variation due to sagita [0,1] | |
cb801d41 | 138 | static Double_t QdcEle (Int_t iPad,Bool_t isSag=kTRUE ){return isSag?33*(1+QdcSag(iPad)):33;} //mean QDC per electron |
db910db9 | 139 | static inline Int_t Hit2SDigs (Int_t iPad, Double_t e,TClonesArray* pSDigLst); //hit->sdigits, returns Qtot |
140 | static inline Int_t Hit2SDigs (TVector2 hit,Double_t e,TClonesArray* pSDigLst); //hit->sdigits, returns Qtot, old style | |
141 | static void TestHit2SDigs (Double_t x,Double_t y,Double_t e,Bool_t isNew=kFALSE); //test hit->sdigits | |
142 | ||
0fe8fa07 | 143 | inline static Bool_t IsOverTh(Int_t c,TVector pad,Double_t q); //is QDC of the pad registered by FEE |
cb801d41 | 144 | static Int_t NsigmaTh() {return 4;} // |
145 | static Float_t SigmaThMean() {return 1.132;} //QDC electronic noise mean | |
146 | static Float_t SigmaThSpread() {return 0.035;} //QDC electronic noise width | |
e42a7b46 | 147 | |
ae754cdf | 148 | 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 | 149 | -2.66575e-3*TMath::Sin(4*TMath::Pi()/PadSizeX()*x) |
f770edb5 | 150 | +2.80553e-3*TMath::Sin(6*TMath::Pi()/PadSizeX()*x)+0.0070;} |
db910db9 | 151 | |
152 | TVector3 ForwardTracing(TVector3 entranceTrackPoint,TVector3 vectorTrack, Double_t thetaC, Double_t phiC); //it traces foward a photon from Emission Point to PC | |
153 | static TVector3 PlaneIntersect(const TVector3 &lineDir,const TVector3 &linePoint,const TVector3 &planeNorm,const TVector3 &planePoint); //intersection between line and plane | |
154 | static Double_t SnellAngle(Float_t n1, Float_t n2, Float_t theta1); // Snell law | |
155 | 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 | |
156 | static Double_t AlphaFeedback(Int_t c,Int_t s) {c++;s++; return 0.02;} //for sector s of chamber c | |
157 | //test part | |
158 | static void Test() {TestSeg();TestTrans();TestResp();} //test all groups of methodes | |
159 | static void TestResp(); //test the response group of methodes | |
160 | static void TestSeg(); //test the segmentation group of methodes | |
161 | static void TestTrans(); //test the transform group of methodes | |
162 | ||
db910db9 | 163 | enum EPlaneId {kCenter,kPc,kRad,kAnod,kNch=7}; //4 planes in chamber and total number of chambers |
164 | protected: | |
165 | AliRICHParam(); //default ctor is protected to enforce it to be singleton | |
166 | static AliRICHParam *fgInstance; //static pointer to instance of AliRICHParam singleton | |
cb801d41 | 167 | TF2 *fIdxC6F14; //n=f(Ephot,T) [GeV] for radiator freon C6F14 |
168 | TGeoHMatrix *fMatrix[kNchambers]; //poiners to matrices defining RICH chambers rotations-translations | |
169 | ClassDef(AliRICHParam,0) //RICH main parameters class | |
d48cca74 | 170 | }; |
db910db9 | 171 | |
172 | AliRICHParam* AliRICHParam::Instance() | |
173 | { | |
174 | // Return pointer to the AliRICHParam singleton. | |
175 | // Arguments: none | |
176 | // Returns: pointer to the instance of AliRICHParam or 0 if no geometry | |
177 | if(!fgInstance&&gGeoManager) new AliRICHParam; | |
178 | else if(!gGeoManager) Printf("No geometry imported"); | |
179 | return fgInstance; | |
180 | }//Instance() | |
c2c6679b | 181 | //__________________________________________________________________________________________________ |
c712cb2f | 182 | Int_t AliRICHParam::PadNeighbours(Int_t iPadX,Int_t iPadY,Int_t listX[4],Int_t listY[4]) |
183 | { | |
a25b3368 | 184 | //Determines all the neighbouring pads for the given one (iPadX,iPadY). Returns total number of these pads. |
185 | //Dead zones are taken into account, meaning pads from different sector are not taken. | |
e42a7b46 | 186 | // 1 |
187 | // 2 3 | |
188 | // 4 | |
c712cb2f | 189 | Int_t nPads=0; |
e42a7b46 | 190 | if(iPadY!=NpadsY()&&iPadY!=2*NpadsYsec()&&iPadY!=NpadsYsec()){listX[nPads]=iPadX; listY[nPads]=iPadY+1; nPads++;} //1 |
191 | if(iPadX!=1&&iPadX!=NpadsXsec()+1) {listX[nPads]=iPadX-1; listY[nPads]=iPadY; nPads++;} //2 | |
192 | if(iPadX!=NpadsXsec()&&iPadX!=NpadsX()) {listX[nPads]=iPadX+1; listY[nPads]=iPadY; nPads++;} //3 | |
193 | if(iPadY!=1&&iPadY!=NpadsYsec()+1&&2*NpadsYsec()+1) {listX[nPads]=iPadX; listY[nPads]=iPadY-1; nPads++;} //4 | |
ed3ceb24 | 194 | |
c712cb2f | 195 | return nPads; |
196 | }//Pad2ClosePads() | |
197 | //__________________________________________________________________________________________________ | |
a25b3368 | 198 | Int_t AliRICHParam::Loc2Sec(const TVector2 &v2) |
3582c1f9 | 199 | { |
db910db9 | 200 | // Determines sector containing the given point. y ^ 5 6 |
201 | // | 3 4 | |
202 | // | 1 2 | |
203 | // -------> x | |
204 | // Arguments: v2- LORS position [cm] | |
205 | // Returns: sector code | |
206 | Double_t x0=0; Double_t x1=SecSizeX(); Double_t x2=SecSizeX()+DeadZone(); Double_t x3=PcSizeX(); | |
207 | Double_t y0=0; Double_t y1=SecSizeY(); Double_t y2=SecSizeY()+DeadZone(); Double_t y3=2*SecSizeY()+DeadZone(); | |
208 | Double_t y4=PcSizeY()-SecSizeY(); Double_t y5=PcSizeY(); | |
e42a7b46 | 209 | |
0fe8fa07 | 210 | Int_t sector=-1; |
a25b3368 | 211 | if (v2.X() >= x0 && v2.X() <= x1 ) sector=1; |
212 | else if(v2.X() >= x2 && v2.X() <= x3 ) sector=2; | |
0fe8fa07 | 213 | else return -1; |
3582c1f9 | 214 | |
a25b3368 | 215 | if (v2.Y() >= y0 && v2.Y() <= y1 ) ; //sectors 1 or 2 |
216 | else if(v2.Y() >= y2 && v2.Y() <= y3 ) sector+=2; //sectors 3 or 4 | |
217 | else if(v2.Y() >= y4 && v2.Y() <= y5 ) sector+=4; //sectors 5 or 6 | |
0fe8fa07 | 218 | else return -1; |
3582c1f9 | 219 | return sector; |
c712cb2f | 220 | }//Loc2Sec(Double_t x, Double_t y) |
c2c6679b | 221 | //__________________________________________________________________________________________________ |
a25b3368 | 222 | TVector AliRICHParam::Loc2Pad(const TVector2 &loc) |
3582c1f9 | 223 | { |
a25b3368 | 224 | //Determines pad number TVector(padx,pady) containing the given point x2 defined in the chamber RS. |
225 | //Pad count starts in lower left corner from 1,1 to 144,160 in upper right corner of a chamber. | |
e42a7b46 | 226 | //y ^ 5 6 |
227 | // | 3 4 | |
228 | // | 1 2 | |
229 | // -------> x | |
230 | TVector pad(2); | |
a25b3368 | 231 | Int_t sec=Loc2Sec(loc);//trasforms x2 to sector reference system |
0fe8fa07 | 232 | if(sec==-1) {pad[0]=pad[1]=-1; return pad;} |
a25b3368 | 233 | //first we deal with x |
234 | if(sec==1||sec==3||sec==5) pad[0]= Int_t( loc.X() / PadSizeX() )+1; //sector 1 or 3 or 5 | |
235 | else pad[0]=NpadsX() - Int_t( (PcSizeX()-loc.X()) / PadSizeX() ) ; //sector 2 or 4 or 6 | |
236 | //second deal with y | |
d3eb6079 | 237 | if(sec==1||sec==2) pad[1]=Int_t( loc.Y() / PadSizeY())+1; //sector 1 or 2 |
db910db9 | 238 | else if(sec==3||sec==4) pad[1]=Int_t( (loc.Y()-SecSizeY()-DeadZone()) / PadSizeY())+NpadsYsec()+1; //sector 3 or 4 |
d3eb6079 | 239 | else pad[1]=NpadsY() - Int_t( (PcSizeY()-loc.Y()) / PadSizeY()); //sector 5 or 6 |
e42a7b46 | 240 | return pad; |
3582c1f9 | 241 | } |
db910db9 | 242 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
243 | Int_t AliRICHParam::Lors2Pad(Double_t x,Double_t y) | |
244 | { | |
245 | // Determines abs pad number containing the given point (x,y) defined in the chamber RS. | |
246 | // Pad count starts in lower left corner from 1,1 to 144,160 in upper right corner of a chamber. | |
247 | // y ^ 5 6 | |
248 | // | 3 4 | |
249 | // | 1 2 | |
250 | // -------> x | |
251 | Int_t padx,pady; | |
252 | if (x>= 0 && x<= SecSizeX() ) padx= 1 + Int_t( x /PadSizeX() ); //sector 1 or 3 or 5 | |
253 | else if(x>=SecSizeX()+DeadZone() && x<= PcSizeX() ) padx= NpadsX() - Int_t( (PcSizeX()-x)/PadSizeX() ); //sector 2 or 4 or 6 | |
254 | else return -1; //dead zone or out of chamber | |
255 | ||
256 | ||
257 | if (y>= 0 && y<= SecSizeY() ) pady= 1 + Int_t( y /PadSizeY() ); //sector 1 or 2 | |
258 | else if(y>=SecSizeY()+DeadZone() && y<=2*SecSizeY()+DeadZone() ) pady= 1 + NpadsYsec() + Int_t( (y-SecSizeY()-DeadZone()) / PadSizeY()); //sector 3 or 4 | |
259 | else if(y>= PcSizeY()-SecSizeY() && y<= PcSizeY() ) pady= NpadsY() - Int_t( (PcSizeY()-y)/PadSizeY() ); //sector 5 or 6 | |
260 | else return -1; //dead zone or out of chamber | |
261 | ||
262 | return AliRICHDigit::P2A(0,padx,pady); | |
263 | }//Lors2Pad() | |
264 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
998b831f | 265 | Int_t AliRICHParam::Pad2Sec(const TVector &pad) |
3582c1f9 | 266 | { |
a25b3368 | 267 | //Determines sector containing the given pad. |
0fe8fa07 | 268 | Int_t sector=-1; |
e42a7b46 | 269 | if (pad[0] >= 1 && pad[0] <= NpadsXsec() ) {sector=1;} |
270 | else if(pad[0] > NpadsXsec() && pad[0] <= NpadsX() ) {sector=2;} | |
998b831f | 271 | else AliDebugClass(1,Form("Wrong pad (%3.0f,%3.0f)",pad[0],pad[1])); |
e42a7b46 | 272 | |
273 | if (pad[1] >= 1 && pad[1] <= NpadsYsec() ) {} | |
274 | else if(pad[1] > NpadsYsec() && pad[1] <= 2*NpadsYsec() ) {sector+=2;} | |
275 | else if(pad[1] > 2*NpadsYsec() && pad[1] <= NpadsY() ) {sector+=4;} | |
998b831f | 276 | else AliDebugClass(1,Form("Wrong pad (%3.0f,%3.0f)",pad[0],pad[1])); |
c712cb2f | 277 | |
e42a7b46 | 278 | return sector; |
c712cb2f | 279 | }//Pad2Sec() |
db910db9 | 280 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
e42a7b46 | 281 | TVector2 AliRICHParam::Pad2Loc(TVector pad) |
c712cb2f | 282 | { |
a25b3368 | 283 | //Returns position of the center of the given pad in local system of the chamber (cm) |
e42a7b46 | 284 | // y ^ 5 6 |
998b831f | 285 | // | 3 4 sector numbers |
e42a7b46 | 286 | // | 1 2 |
287 | // -------> x | |
0fe8fa07 | 288 | Double_t x=-1,y=-1; |
e42a7b46 | 289 | if(pad[0] > 0 && pad[0] <= NpadsXsec())//it's 1 or 3 or 5 |
290 | x=(pad[0]-0.5)*PadSizeX(); | |
291 | else if(pad[0] > NpadsXsec() && pad[0] <= NpadsX())//it's 2 or 4 or 6 | |
292 | x=(pad[0]-0.5)*PadSizeX()+DeadZone(); | |
c2c6679b | 293 | else |
998b831f | 294 | AliDebugClass(1,Form("Wrong pad (%3.0f,%3.0f)",pad[0],pad[1])); |
e42a7b46 | 295 | |
296 | if(pad[1] > 0 && pad[1] <= NpadsYsec())//it's 1 or 2 | |
297 | y=(pad[1]-0.5)*PadSizeY(); | |
298 | else if(pad[1] > NpadsYsec() && pad[1] <= 2*NpadsYsec())//it's 3 or 4 | |
299 | y=(pad[1]-0.5)*PadSizeY()+DeadZone(); | |
300 | else if(pad[1] > 2*NpadsYsec() && pad[1]<= NpadsY())//it's 5 or 6 | |
301 | y=(pad[1]-0.5)*PadSizeY()+2*DeadZone(); | |
302 | else | |
998b831f | 303 | AliDebugClass(1,Form("Wrong pad (%3.0f,%3.0f)",pad[0],pad[1])); |
e42a7b46 | 304 | |
3582c1f9 | 305 | return TVector2(x,y); |
306 | } | |
db910db9 | 307 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
0422a446 | 308 | TVector2 AliRICHParam::Pad2Loc(Int_t pad) |
309 | { | |
db910db9 | 310 | // Converts absolute pad number to local position in LORS |
311 | // LORS is a chamber reference system with origin in left-down coner looking from IP | |
312 | // Arguments: pad- absolute pad number | |
313 | // Returns: pad center position as TVector2 in PCRS | |
0422a446 | 314 | TVector2 pos; |
315 | pos.Set((Pad2PadX(pad)-0.5)*PadSizeX() , (Pad2PadY(pad)-0.5)*PadSizeY());//set to sector LORS | |
316 | return pos; | |
317 | } | |
db910db9 | 318 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
e42a7b46 | 319 | Double_t AliRICHParam::GainSag(Double_t x,Int_t sector) |
c60862bf | 320 | { |
a25b3368 | 321 | //Returns % of gain variation due to wire sagita. |
322 | //All curves are parametrized as per sector basis, so x must be apriory transformed to the Sector RS. | |
323 | //Here x is a distance along wires. | |
db910db9 | 324 | x-=SecSizeX()/2; |
325 | if(x>SecSizeX()) x-=SecSizeX(); | |
3582c1f9 | 326 | switch(HV(sector)){ |
e42a7b46 | 327 | 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;//% |
328 | 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; | |
329 | 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; | |
330 | 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 | 331 | default: return 0; |
332 | } | |
c712cb2f | 333 | } |
db910db9 | 334 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
335 | Double_t AliRICHParam::QdcSag(Int_t iPad) | |
336 | { | |
337 | // It was observed at BNL that wires are affected by gravitation field providing a significant sagita leading to the local electric field variation | |
338 | // which means that different pads produce different signals. | |
339 | // Arguments: iPad- absolute pad number | |
340 | // Returns: gain variation due to wire sagita 0 < QdcSag < 1. | |
341 | // Curves are parametrised in terms of distance x (cm) along wires having 0 on the left edge of the photocathode | |
342 | Double_t x=AliRICHDigit::P2X(iPad)*PadSizeX()-0.5*PadSizeX(); //center of the padx (count from 1) | |
343 | switch(HV(iPad)){ | |
344 | 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 | |
345 | 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); | |
346 | 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); | |
347 | 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); | |
348 | default: return 0; | |
349 | } | |
350 | }//QdcSag() | |
351 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
352 | Int_t AliRICHParam::QdcTot(Int_t iPad,Double_t e) | |
353 | { | |
354 | // Calculates the total charge produced by the hit. Method: | |
355 | // 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) | |
356 | // 2. each electron imposes a charge distributed as Poisson with QdcEle() mean. Different pads produce different means. See QdcEle(). | |
357 | // Arguments: iPad- absolute pad number contaning the hit; | |
358 | // e- Eloss for mip in amplification gas or Etot for photon | |
359 | // Returns: charge parametrised in QDC channels. | |
360 | Int_t iNele=Int_t(e/IonPot()); if(iNele==0) iNele=1;//e < ion. pot. means it's photoelectron | |
361 | Double_t dQdc=0; | |
362 | for(Int_t i=1;i<=iNele;i++) dQdc+=-QdcEle(iPad)*TMath::Log(gRandom->Rndm()); | |
363 | return Int_t(dQdc); | |
364 | }//QdcTot() | |
365 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
3582c1f9 | 366 | Int_t AliRICHParam::TotQdc(TVector2 x2,Double_t eloss) |
367 | { | |
a25b3368 | 368 | //Calculates the total charge produced by the eloss in point x2 (Chamber RS). |
369 | //Returns this change parametrised in QDC channels, or 0 if the hit in the dead zone. | |
370 | //eloss=0 means photon which produces 1 electron only eloss > 0 for Mip | |
0fe8fa07 | 371 | if(Loc2Sec(x2)==-1) return 0; //hit in the dead zone |
3582c1f9 | 372 | Int_t iNelectrons=Int_t(eloss/IonisationPotential()); if(iNelectrons==0) iNelectrons=1; |
373 | Double_t qdc=0; | |
374 | for(Int_t i=1;i<=iNelectrons;i++) qdc+=-Gain(x2)*TMath::Log(gRandom->Rndm()); | |
375 | return Int_t(qdc); | |
376 | } | |
db910db9 | 377 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
a25b3368 | 378 | Double_t AliRICHParam::FracQdc(const TVector2 &x2,const TVector &pad) |
3582c1f9 | 379 | { |
a25b3368 | 380 | //Calculates the charge fraction induced to given pad by the hit from the given point. |
381 | //Integrated Mathieson distribution is used. | |
e42a7b46 | 382 | TVector2 center2=Pad2Loc(pad);//gives center of requested pad |
998b831f | 383 | Double_t normXmin=(x2.X()-center2.X()-PadSizeX()/2) /Pc2Cath();//parametrise for Mathienson |
384 | Double_t normXmax=(x2.X()-center2.X()+PadSizeX()/2) /Pc2Cath(); | |
385 | Double_t normYmin=(x2.Y()-center2.Y()-PadSizeY()/2) /Pc2Cath(); | |
386 | Double_t normYmax=(x2.Y()-center2.Y()+PadSizeY()/2) /Pc2Cath(); | |
387 | ||
388 | //requested pad might not belong to the sector of the given hit position, hence the check: | |
389 | return (Loc2Sec(x2)!=Pad2Sec(pad)) ? 0:Mathieson(normXmin, normYmin, normXmax, normYmax); | |
3582c1f9 | 390 | } |
db910db9 | 391 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
0422a446 | 392 | Double_t AliRICHParam::Mathieson(Double_t x1,Double_t y1,Double_t x2,Double_t y2) |
3582c1f9 | 393 | { |
db910db9 | 394 | // This is the answer to electrostatic problem of charge distrubution in MWPC described elsewhere. (NIM A370(1988)602-603) |
395 | // Arguments: x1- diff between center of distribution which is a hit position and left edge of interested pad divided by anod-cathode distance | |
396 | // x2- right edge of the pad | |
397 | // y1- up edge of the pad | |
398 | // y2- bottom edge of the pad | |
399 | // Returns: a charge fraction [0-1] imposed into the pad | |
53fd478b | 400 | const Double_t kSqrtKx3=0.77459667;const Double_t kX2=0.962;const Double_t kX4=0.379; |
401 | const Double_t kSqrtKy3=0.77459667;const Double_t kY2=0.962;const Double_t kY4=0.379; | |
c712cb2f | 402 | |
0422a446 | 403 | Double_t ux1=kSqrtKx3*TMath::TanH(kX2*x1); |
404 | Double_t ux2=kSqrtKx3*TMath::TanH(kX2*x2); | |
405 | Double_t uy1=kSqrtKy3*TMath::TanH(kY2*y1); | |
406 | Double_t uy2=kSqrtKy3*TMath::TanH(kY2*y2); | |
53fd478b | 407 | return 4*kX4*(TMath::ATan(ux2)-TMath::ATan(ux1))*kY4*(TMath::ATan(uy2)-TMath::ATan(uy1)); |
0422a446 | 408 | } |
db910db9 | 409 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
a25b3368 | 410 | TVector AliRICHParam::Loc2Area(const TVector2 &x2) |
3582c1f9 | 411 | { |
db910db9 | 412 | // Calculates the area of disintegration for a given point. It's assumed here that this points lays on anode wire. |
413 | // Area is a rectangulare set of pads defined by its left-down and right-up coners. | |
e42a7b46 | 414 | TVector area(4); |
415 | TVector pad=Loc2Pad(x2); | |
416 | area[0]=area[2]=pad[0]; area[1]=area[3]=pad[1];//area is just a pad fired | |
417 | if(pad[0]!=1 && pad[0]!= NpadsXsec()+1 ) area[0]--; //left down coner X | |
418 | if(pad[1]!=1 && pad[1]!= NpadsYsec()+1 && pad[1]!= 2*NpadsYsec()+1) area[1]--; //left down coner Y | |
419 | if(pad[0]!=NpadsXsec() && pad[0]!= NpadsX() ) area[2]++; //right up coner X | |
420 | if(pad[1]!=NpadsYsec() && pad[1]!= 2*NpadsYsec() && pad[1]!= NpadsY() ) area[3]++; //right up coner Y | |
421 | return area; | |
3582c1f9 | 422 | } |
db910db9 | 423 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
424 | Bool_t AliRICHParam::IsOverTh(Int_t ,TVector ,Double_t qdc) | |
3582c1f9 | 425 | { |
db910db9 | 426 | // Checks if the current QDC is over threshold and FEE will save this value to data concentrator. |
427 | // This is done on pad by pad level, so the pad pedestal map is to be used. ?????????????? | |
428 | // Arguments: | |
429 | // Returns: true if QDC over treshold | |
430 | return (qdc>NsigmaTh()*(SigmaThMean()+(1.-2*gRandom->Rndm())*SigmaThSpread())); //??????????? to be change to real values | |
3582c1f9 | 431 | } |
db910db9 | 432 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
433 | TGeoMatrix* AliRICHParam::Matrix(Int_t iChamN,Int_t iPlane) | |
434 | { | |
435 | TGeoHMatrix *pMatrix=new TGeoHMatrix; | |
436 | ||
437 | const Double_t kAngHor=19.5; // horizontal angle between chambers 19.5 grad | |
438 | const Double_t kAngVer=20; // vertical angle between chambers 20 grad | |
439 | const Double_t kAngCom=30; // common RICH rotation with respect to x axis 30 grad | |
440 | ||
441 | pMatrix->RotateY(90); //rotate around y since initial position is in XY plane -> now in YZ plane | |
442 | Double_t trans[3]={490,0,0}; //center of the chamber is on window-gap surface | |
443 | ||
444 | switch(iPlane){ | |
445 | case kCenter: break; | |
446 | case kPc : trans[0]+=PcZ(); break; | |
447 | case kRad : trans[0]+=RadZ(); break; | |
448 | case kAnod : trans[0]+=AnodZ(); break; | |
449 | default: return 0; break; | |
450 | } | |
451 | pMatrix->SetTranslation(trans); //now plane in YZ is shifted along x | |
452 | ||
453 | switch(iChamN){ | |
454 | case 1: pMatrix->RotateY(kAngHor); pMatrix->RotateZ(-kAngVer); break; //right and down | |
455 | case 2: pMatrix->RotateZ(-kAngVer); break; //down | |
456 | case 3: pMatrix->RotateY(kAngHor); break; //right | |
457 | case 4: break; //no rotation | |
458 | case 5: pMatrix->RotateY(-kAngHor); break; //left | |
459 | case 6: pMatrix->RotateZ(kAngVer); break; //up | |
460 | case 7: pMatrix->RotateY(-kAngHor); pMatrix->RotateZ(kAngVer); break; //left and up | |
461 | default: return 0; break; | |
462 | }//switch(iChamber) | |
463 | pMatrix->RotateZ(kAngCom); //apply common rotation in XY plane | |
464 | return pMatrix; | |
465 | }//Matrix() | |
466 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
467 | TVector3 AliRICHParam::Lors2Mars(Int_t iChId,Double_t x,Double_t y,Int_t iPlnId) | |
468 | { | |
469 | // Trasform from LORS to MARS | |
470 | // Arguments: iChId - chamber code 1..7 | |
471 | // x,y - point in LORS | |
472 | // iPlnN - chamber plane code might be kPc kRad kCenter kAnod | |
473 | Double_t z=0; | |
474 | switch(iPlnId){ | |
475 | case kPc : z=PcZ() ; break; | |
476 | case kAnod : z=AnodZ(); break; | |
477 | case kCenter: z=0 ; break; | |
478 | case kRad : z=RadZ() ; break; | |
479 | } | |
480 | Double_t lors[3]={x-0.5*PcSizeX(),y-0.5*PcSizeY(),z}, mars[3]; | |
481 | fMatrix[iChId-1]->LocalToMaster(lors,mars); | |
482 | return TVector3(mars); | |
483 | } | |
484 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
cb801d41 | 485 | TVector3 AliRICHParam::Lors2MarsVec(Int_t iCh,const TVector3 &p) |
486 | { | |
487 | Double_t mars[3], lors[3]; p.GetXYZ(lors); | |
488 | fMatrix[iCh-1]->LocalToMasterVect(lors,mars); | |
489 | return TVector3(mars); | |
490 | } | |
491 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
db910db9 | 492 | TVector2 AliRICHParam::Mars2Lors(Int_t iChId,const TVector3 &x,Int_t iPlnId) |
493 | { | |
494 | // Trasform from MARS to LORS | |
495 | // Arguments: iChId - chamber code 1..7 | |
496 | // mars - point in MARS | |
497 | // iPlnN - chamber plane code might be kPc kRad kCenter kAnod | |
498 | Double_t z=0; | |
499 | switch(iPlnId){ | |
500 | case kPc : z=PcZ() ; break; | |
501 | case kAnod : z=AnodZ(); break; | |
502 | case kCenter: z=0 ; break; | |
503 | case kRad : z=RadZ() ; break; | |
504 | } | |
505 | Double_t lors[3],mars[3]; | |
506 | x.GetXYZ(mars); | |
507 | fMatrix[iChId-1]->MasterToLocal(mars,lors); | |
508 | return TVector2(lors[0]+0.5*PcSizeX(),lors[1]+0.5*PcSizeY()); | |
509 | } | |
510 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
cb801d41 | 511 | TVector3 AliRICHParam::Mars2LorsVec(Int_t iCh,const TVector3 &p) |
512 | { | |
513 | Double_t mars[3], lors[3]; p.GetXYZ(mars); | |
514 | fMatrix[iCh-1]->MasterToLocalVect(mars,lors); | |
515 | return TVector3(lors); | |
516 | } | |
517 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
db910db9 | 518 | TVector3 AliRICHParam::Lors2MarsOld(Int_t iChId,Double_t x,Double_t y,Int_t iPlnId) |
519 | { | |
520 | // Trasform from LORS to MARS | |
521 | // Arguments: iChId - chamber code 0..6 | |
522 | // x,y - point in LORS | |
523 | // iPlnN - chamber plane code might be kPc kRad kCenter kAnod | |
524 | TGeoMatrix *pMatrix=Matrix(iChId,iPlnId); | |
525 | Double_t lors[3]={x-0.5*PcSizeX(),y-0.5*PcSizeY(),0}, mars[3]; pMatrix->LocalToMaster(lors,mars); delete pMatrix; | |
526 | return TVector3(mars); | |
527 | } | |
528 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
529 | TVector2 AliRICHParam::Mars2LorsOld(Int_t iChamN,const TVector3 &x,Int_t iPlaneN) | |
530 | { | |
531 | TGeoMatrix *pMatrix=Matrix(iChamN,iPlaneN); | |
532 | Double_t mars[3]={x.X(),x.Y(),x.Z()} , lors[3]; pMatrix->MasterToLocal(mars,lors); delete pMatrix; | |
533 | return TVector2(lors[0]+0.5*PcSizeX(),lors[1]+0.5*PcSizeY()); | |
534 | } | |
535 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
db910db9 | 536 | TVector3 AliRICHParam::Center(Int_t iChamN,Int_t iPlaneN) |
537 | { | |
538 | TGeoMatrix *pMatrix=Matrix(iChamN,iPlaneN); | |
539 | Double_t mars[3] , lors[3]={0,0,0}; pMatrix->LocalToMaster(lors,mars); delete pMatrix; | |
540 | return TVector3(mars); | |
541 | } | |
542 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
543 | TVector3 AliRICHParam::Norm(Int_t iChamN) | |
544 | { | |
545 | TGeoMatrix *pMatrix=Matrix(iChamN,kPc); | |
546 | Double_t mars[3] , lors[3]={0,0,1}; pMatrix->LocalToMasterVect(lors,mars); delete pMatrix; | |
547 | return TVector3(mars); | |
548 | } | |
549 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
550 | Int_t AliRICHParam::Hit2SDigs(Int_t iHitPad,Double_t e,TClonesArray *pSDigLst) | |
551 | { | |
552 | // Determines a number of pads affected by the hit and calculates the charge induced to each pad. | |
553 | // Integrated Mathieson distribution is used. Invoked from AliRICHvX::Hits2SDigits() | |
554 | // Arguments: iHitPad - hit pad absolute number | |
555 | // e - energy (GeV) of this hit (Eloss for mip or Etot for photon) | |
556 | // pSDigLst - pointer to clones array to store in calculated sdigits | |
557 | // Returns: total QDC for this hit | |
558 | Int_t iQtot=QdcTot(iHitPad,e); //total QDC value collected for this hit | |
559 | Int_t a=1; //analise current pad +- a pads in both directions | |
560 | Int_t iLeftX=0,iBotY=0,iRightX=0,iTopY=0; //area of disintegration for cluster formation, shifts to hit pad, not pad numbers | |
561 | if(AliRICHDigit::P2X(iHitPad) > a) iLeftX =-a;//determine area of disintegration as hit pad +- parametrised number | |
562 | if(AliRICHDigit::P2X(iHitPad) < AliRICHDigit::kPadsSecX-a) iRightX= a;//of pads. this number is determined by5 sigmas of Mathieson shape | |
563 | if(AliRICHDigit::P2Y(iHitPad) > a) iBotY =-a;//see RICH TDR page 29 | |
564 | if(AliRICHDigit::P2Y(iHitPad) < AliRICHDigit::kPadsSecY-a) iTopY = a;//also boundary conditions are checked (edge of sector aka PC) | |
565 | Int_t iPadsCnt=0; | |
566 | for(Int_t iShiftX=iLeftX;iShiftX<=iRightX;iShiftX++){//affected pads loop iShiftX is a distance (in pads) between hit pad and pad under analisys | |
567 | for(Int_t iShiftY=iBotY;iShiftY<=iTopY;iShiftY++){//affected pads loop | |
568 | iHitPad+=AliRICHDigit::kPadAbsX*iShiftX+iShiftY; | |
569 | Double_t x1=PadSizeX()/Pc2Cath()*(iShiftX-0.5);//parametrise for Mathienson | |
570 | Double_t x2=PadSizeX()/Pc2Cath()*(iShiftX+0.5);//parametrise for Mathienson | |
571 | Double_t y1=PadSizeY()/Pc2Cath()*(iShiftY-0.5);//parametrise for Mathienson | |
572 | Double_t y2=PadSizeY()/Pc2Cath()*(iShiftY+0.5);//parametrise for Mathienson | |
573 | (*pSDigLst)[iPadsCnt++]= new AliRICHDigit(iHitPad,iQtot*Mathieson(x1,y1,x2,y2)); | |
574 | }//Y loop | |
575 | }//X loop | |
576 | return iQtot; | |
577 | }//Hit2SDigs() for abs pad | |
578 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
579 | Int_t AliRICHParam::Hit2SDigs(TVector2 hitX2,Double_t e,TClonesArray *pSDigLst) | |
580 | { | |
581 | // Determines a number of pads affected by the hit and calculates the charge induced to each pad. | |
582 | // Integrated Mathieson distribution is used. Invoked from AliRICHvX::Hits2SDigits() | |
583 | // Arguments: hitX2 - hit position in LORS, cm | |
584 | // e - energy (GeV) of this hit (Eloss for mip or Etot for photon) | |
585 | // pSDigLst - pointer to clones array to store in calculated sdigits | |
586 | // Returns: total QDC for this hit | |
587 | Int_t iQtot=TotQdc(hitX2,e);//total charge produced by hit, 0 if hit in dead zone | |
588 | if(iQtot==0) return 0; | |
589 | ||
590 | TVector hitPad=Loc2Pad(hitX2); TVector2 padCenterX2=Pad2Loc(hitPad); //shift the hit position to the nearest anod wire | |
591 | TVector2 anod; | |
592 | if((hitX2.Y()-padCenterX2.Y())>0) anod.Set(hitX2.X(),padCenterX2.Y()+AnodPitch()/2); //upper part of the pad: shift to upper anod wire | |
593 | else anod.Set(hitX2.X(),padCenterX2.Y()-AnodPitch()/2); //lower part of the pad: shift to lower anod wire | |
594 | ||
595 | TVector area=Loc2Area(anod);//determine affected pads, dead zones analysed inside | |
596 | TVector pad(2); //current pad | |
597 | Int_t iPadsCnt=0; | |
598 | for(pad[1]=area[1];pad[1]<=area[3];pad[1]++){//affected pads loop | |
599 | for(pad[0]=area[0];pad[0]<=area[2];pad[0]++){ | |
600 | Double_t dQpad=iQtot*FracQdc(anod,pad); | |
601 | 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 | |
602 | }//X loop | |
603 | }//Y loop | |
604 | return iQtot; | |
605 | }//Hit2SDigs() for TVector2 | |
606 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
e316c328 | 607 | Double_t AliRICHParam::SigmaSinglePhotonFormula(Double_t thetaC, Double_t phiC, Double_t thetaM, Double_t phiM, Double_t betaM) |
608 | { | |
609 | // Analithical calculation of total error (as a sum of localization, geometrical and chromatic errors) on Cerenkov angle for a given Cerenkov photon | |
610 | // created by a given MIP. Fromulae according to CERN-EP-2000-058 | |
611 | // Arguments: Cerenkov and azimuthal angles for Cerenkov photon, [radians] | |
612 | // dip and azimuthal angles for MIP taken at the entrance to radiator, [radians] | |
613 | // MIP beta | |
614 | // Returns: absolute error on Cerenkov angle, [radians] | |
615 | ||
db910db9 | 616 | TVector3 v(-999,-999,-999); |
617 | ||
e316c328 | 618 | v.SetX(ErrLoc (thetaC,phiC,thetaM,phiM,betaM)); |
619 | v.SetY(ErrGeom(thetaC,phiC,thetaM,phiM,betaM)); | |
620 | v.SetZ(ErrCrom(thetaC,phiC,thetaM,phiM,betaM)); | |
db910db9 | 621 | |
cb801d41 | 622 | return v.Mag2(); |
db910db9 | 623 | } |
624 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
e316c328 | 625 | Double_t AliRICHParam::ErrLoc(Double_t thetaC, Double_t phiC, Double_t thetaM, Double_t phiM, Double_t betaM) |
db910db9 | 626 | { |
e316c328 | 627 | // Analithical calculation of localization error (due to finite segmentation of PC) on Cerenkov angle for a given Cerenkov photon |
628 | // created by a given MIP. Fromulae according to CERN-EP-2000-058 | |
629 | // Arguments: Cerenkov and azimuthal angles for Cerenkov photon, [radians] | |
630 | // dip and azimuthal angles for MIP taken at the entrance to radiator, [radians] | |
631 | // MIP beta | |
632 | // Returns: absolute error on Cerenkov angle, [radians] | |
633 | Double_t refC6F14m = 1.29337; | |
634 | Double_t phiDelta = phiC - phiM; | |
db910db9 | 635 | |
e316c328 | 636 | Double_t alpha =TMath::Cos(thetaM)-TMath::Tan(thetaC)*TMath::Cos(phiDelta)*TMath::Sin(thetaM); |
637 | Double_t k = 1.-refC6F14m*refC6F14m+alpha*alpha/(betaM*betaM); | |
638 | if (k<0) return 1e10; | |
db910db9 | 639 | |
e316c328 | 640 | 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)); |
641 | 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)); | |
db910db9 | 642 | |
e316c328 | 643 | Double_t kk = betaM*TMath::Sqrt(k)/(Pc2Win()*alpha); |
644 | 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)); | |
645 | 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)); | |
db910db9 | 646 | |
647 | return TMath::Sqrt(0.2*0.2*dtdxc*dtdxc + 0.25*0.25*dtdyc*dtdyc); | |
648 | } | |
cb801d41 | 649 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
e316c328 | 650 | Double_t AliRICHParam::ErrCrom(Double_t thetaC, Double_t phiC, Double_t thetaM, Double_t phiM, Double_t betaM) |
651 | { | |
652 | // Analithical calculation of chromatic error (due to lack of knowledge of Cerenkov photon energy) on Cerenkov angle for a given Cerenkov photon | |
653 | // created by a given MIP. Fromulae according to CERN-EP-2000-058 | |
654 | // Arguments: Cerenkov and azimuthal angles for Cerenkov photon, [radians] | |
655 | // dip and azimuthal angles for MIP taken at the entrance to radiator, [radians] | |
656 | // MIP beta | |
657 | // Returns: absolute error on Cerenkov angle, [radians] | |
658 | Double_t phiDelta = phiC - phiM; | |
659 | Double_t refC6F14m = 1.29337; | |
660 | Double_t alpha =TMath::Cos(thetaM)-TMath::Tan(thetaC)*TMath::Cos(phiDelta)*TMath::Sin(thetaM); | |
661 | ||
84093f6f | 662 | //cout << "alpha : "<<alpha<<" thetaC : "<<thetaC<<endl; |
e316c328 | 663 | Double_t dtdn = TMath::Cos(thetaM)*refC6F14m*betaM*betaM/(alpha*TMath::Tan(thetaC)); |
db910db9 | 664 | |
665 | Double_t f = 0.00928*(7.75-5.635)/TMath::Sqrt(12.); | |
666 | ||
667 | return f*dtdn; | |
668 | } | |
669 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
e316c328 | 670 | Double_t AliRICHParam::ErrGeom(Double_t thetaC, Double_t phiC, Double_t thetaM, Double_t phiM, Double_t betaM) |
db910db9 | 671 | { |
e316c328 | 672 | // Analithical calculation of geometric error (due to lack of knowledge of creation point in radiator) on Cerenkov angle for a given Cerenkov photon |
673 | // created by a given MIP. Fromulae according to CERN-EP-2000-058 | |
674 | // Arguments: Cerenkov and azimuthal angles for Cerenkov photon, [radians] | |
675 | // dip and azimuthal angles for MIP taken at the entrance to radiator, [radians] | |
676 | // MIP beta | |
677 | // Returns: absolute error on Cerenkov angle, [radians] | |
db910db9 | 678 | |
e316c328 | 679 | Double_t phiDelta = phiC - phiM; |
680 | Double_t refC6F14m = 1.29337; | |
681 | Double_t alpha =TMath::Cos(thetaM)-TMath::Tan(thetaC)*TMath::Cos(phiDelta)*TMath::Sin(thetaM); | |
db910db9 | 682 | |
e316c328 | 683 | Double_t k = 1.-refC6F14m*refC6F14m+alpha*alpha/(betaM*betaM); |
684 | if (k<0) return 1e10; | |
db910db9 | 685 | |
e316c328 | 686 | Double_t eTr = 0.5*RadThick()*betaM*TMath::Sqrt(k)/(Pc2Win()*alpha); |
687 | Double_t lambda = 1.-TMath::Sin(thetaM)*TMath::Sin(thetaM)*TMath::Sin(phiC)*TMath::Sin(phiC); | |
db910db9 | 688 | |
689 | Double_t c = 1./(1.+ eTr*k/(alpha*alpha*TMath::Cos(thetaC)*TMath::Cos(thetaC))); | |
e316c328 | 690 | Double_t i = betaM*TMath::Tan(thetaC)*lambda*TMath::Power(k,1.5); |
691 | Double_t ii = 1.+eTr*betaM*i; | |
db910db9 | 692 | |
e316c328 | 693 | Double_t err = c * (i/(alpha*alpha*Pc2Win()) + ii*(1.-lambda) / ( alpha*alpha*Pc2Win()*betaM*(1.+eTr)) ); |
694 | Double_t trErr = RadThick()/(TMath::Sqrt(12.)*TMath::Cos(thetaM)); | |
db910db9 | 695 | |
e316c328 | 696 | return trErr*err; |
db910db9 | 697 | }//ErrGeom() |
698 | ||
d48cca74 | 699 | #endif //AliRICHParam_h |