1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
16 #include "AliRICHChamber.h"
17 #include "AliRICHConst.h" //for kR2d
18 #include "AliRICHParam.h"
20 #include <TRotMatrix.h>
21 #include "AliRICHTresholdMap.h"
22 #include "AliSegmentation.h"
23 #include "AliRICHSegmentationV0.h"
24 #include "AliRICHGeometry.h"
25 #include "AliRICHResponse.h"
27 ClassImp(AliRICHChamber)
28 //______________________________________________________________________________
29 AliRICHChamber::AliRICHChamber()
38 for(Int_t i=0; i<50; ++i) fIndexMap[i] = 0;
40 //______________________________________________________________________________
41 AliRICHChamber::AliRICHChamber(Int_t iModuleN,AliRICHParam *pParam)
42 {//named ctor. Defines all geometry parameters for the given module.
46 SetCenter(0,pParam->Offset()-pParam->GapThickness()/2,0);//put to up position
49 RotateX(-pParam->AngleYZ());
50 RotateZ(-pParam->AngleXY());
51 fName="RICHc1";fTitle="RICH chamber 1";
54 RotateZ(-pParam->AngleXY());
55 fName="RICHc2";fTitle="RICH chamber 2";
58 RotateX(-pParam->AngleYZ());
59 fName="RICHc3";fTitle="RICH chamber 3";
62 fName="RICHc4";fTitle="RICH chamber 4"; //no turns
65 RotateX(pParam->AngleYZ());
66 fName="RICHc5";fTitle="RICH chamber 5";
69 RotateZ(pParam->AngleXY());
70 fName="RICHc6";fTitle="RICH chamber 6";
73 RotateX(pParam->AngleYZ());
74 RotateZ(pParam->AngleXY());
75 fName="RICHc7";fTitle="RICH chamber 7";
78 Fatal("named ctor","Wrong chamber number %i, check muster class ctor",iModuleN);
80 RotateZ(pParam->AngleRot());//apply common rotation
81 fpRotMatrix=new TRotMatrix("rot"+fName,"rot"+fName, Rot().ThetaX()*kR2d, Rot().PhiX()*kR2d,
82 Rot().ThetaY()*kR2d, Rot().PhiY()*kR2d,
83 Rot().ThetaZ()*kR2d, Rot().PhiZ()*kR2d);
85 fX=fCenterV3.X();fY=fCenterV3.Y();fZ=fCenterV3.Z();
87 //______________________________________________________________________________
89 void AliRICHChamber::LocaltoGlobal(Float_t local[3],Float_t global[3])
90 {//Local coordinates to global coordinates transformation
93 pMatrix = fpRotMatrix->GetMatrix();
94 global[0]=local[0]*pMatrix[0]+local[1]*pMatrix[3]+local[2]*pMatrix[6];
95 global[1]=local[0]*pMatrix[1]+local[1]*pMatrix[4]+local[2]*pMatrix[7];
96 global[2]=local[0]*pMatrix[2]+local[1]*pMatrix[5]+local[2]*pMatrix[8];
102 void AliRICHChamber::GlobaltoLocal(Float_t global[3],Float_t local[3])
103 {// Global coordinates to local coordinates transformation
104 TMatrix matrixCopy(3,3);
105 Double_t *pMatrixOrig = fpRotMatrix->GetMatrix();
106 for(Int_t i=0;i<3;i++)
108 for(Int_t j=0;j<3;j++)
109 matrixCopy(j,i)=pMatrixOrig[j+3*i];
112 local[0] = global[0] - fX;
113 local[1] = global[1] - fY;
114 local[2] = global[2] - fZ;
115 local[0]=local[0]*matrixCopy(0,0)+local[1]*matrixCopy(0,1)+local[2]*matrixCopy(0,2);
116 local[1]=local[0]*matrixCopy(1,0)+local[1]*matrixCopy(1,1)+local[2]*matrixCopy(1,2);
117 local[2]=local[0]*matrixCopy(2,0)+local[1]*matrixCopy(2,1)+local[2]*matrixCopy(2,2);
120 void AliRICHChamber::DisIntegration(Float_t eloss, Float_t xhit, Float_t yhit,
121 Int_t& iNpads,Float_t cluster[5][500],ResponseType res)
122 {//Generates pad hits (simulated cluster) using the segmentation and the response model
124 Float_t local[3],global[3];
125 // Width of the integration area
126 Float_t dx=(fResponse->SigmaIntegration())*(fResponse->ChargeSpreadX());
127 Float_t dy=(fResponse->SigmaIntegration())*(fResponse->ChargeSpreadY());
128 // Get pulse height from energy loss and generate feedback photons
131 //z-position of the wires relative to the RICH mother volume (2 mm before CsI) old value: 6.076 ???????
132 local[1]=1.276 + fGeometry->GetGapThickness()/2 - .2;
135 LocaltoGlobal(local,global);
139 //To calculate wire sag, the origin of y-position must be the middle of the photcathode
140 AliRICHSegmentationV0* segmentation = (AliRICHSegmentationV0*) GetSegmentationModel();
143 newy = yhit - segmentation->GetPadPlaneLength()/2;
145 newy = yhit + segmentation->GetPadPlaneLength()/2;
148 qtot = fResponse->IntPH(eloss, newy);
149 fResponse->FeedBackPhotons(global,qtot);
150 }else if(res==kPhoton){
151 qtot = fResponse->IntPH(newy);
152 fResponse->FeedBackPhotons(global,qtot);
157 Float_t qcheck=0, qp=0;
160 for(fSegmentation->FirstPad(xhit, yhit, 0, dx, dy);
161 fSegmentation->MorePads();
162 fSegmentation->NextPad()) {
163 qp= fResponse->IntXY(fSegmentation);
167 cluster[0][iNpads]=qp*qtot;// --- store signal information
168 cluster[1][iNpads]=fSegmentation->Ix();
169 cluster[2][iNpads]=fSegmentation->Iy();
170 cluster[3][iNpads]=fSegmentation->ISector();
174 }//void AliRICHChamber::DisIntegration(...
175 //__________________________________________________________________________________________________
176 void AliRICHChamber::GenerateTresholds()
177 {//Generates random treshold charges for all pads
178 Int_t nx = fSegmentation->Npx();
179 Int_t ny = fSegmentation->Npy();
181 fTresh = new AliRICHTresholdMap(fSegmentation);
182 for(Int_t i=-nx/2;i<nx/2;i++){
183 for(Int_t j=-ny/2;j<ny/2;j++){
184 Int_t pedestal = (Int_t)(gRandom->Gaus(50, 10));
185 fTresh->SetHit(i,j,pedestal);
188 }//void AliRICHChamber::GenerateTresholds()
189 //__________________________________________________________________________________________________
190 void AliRICHChamber::Print(Option_t *) const
192 printf("%s r=%8.3f theta=%5.1f phi=%5.1f x=%8.3f y=%8.3f z=%8.3f %6.2f,%6.2f %6.2f,%6.2f %6.2f,%6.2f\n",fName.Data(),
193 Rho(), ThetaD(),PhiD(), X(), Y(), Z(),
194 ThetaXd(),PhiXd(),ThetaYd(),PhiYd(),ThetaZd(),PhiZd());
195 }//void AliRICHChamber::Print(Option_t *option)const
196 //__________________________________________________________________________________________________
197 void AliRICHChamber::SetChamberTransform(Float_t x,Float_t y,Float_t z,TRotMatrix *pRotMatrix)
200 fpRotMatrix=pRotMatrix;