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 {//main ctor. Defines all geometry parameters for the given module.
43 SetToZenith();//put to up position
46 RotateX(-pParam->AngleYZ());
47 RotateZ(-pParam->AngleXY());
48 fName="RICHc1";fTitle="RICH chamber 1";
51 RotateZ(-pParam->AngleXY());
52 fName="RICHc2";fTitle="RICH chamber 2";
55 RotateX(-pParam->AngleYZ());
56 fName="RICHc3";fTitle="RICH chamber 3";
59 fName="RICHc4";fTitle="RICH chamber 4"; //no turns
62 RotateX(pParam->AngleYZ());
63 fName="RICHc5";fTitle="RICH chamber 5";
66 RotateZ(pParam->AngleXY());
67 fName="RICHc6";fTitle="RICH chamber 6";
70 RotateX(pParam->AngleYZ());
71 RotateZ(pParam->AngleXY());
72 fName="RICHc7";fTitle="RICH chamber 7";
75 Fatal("named ctor","Wrong chamber number %i, check CreateChamber ctor",iModuleN);
77 RotateZ(pParam->AngleRot());//apply common rotation
78 fpRotMatrix=new TRotMatrix("rot"+fName,"rot"+fName, Rot().ThetaX()*kR2d, Rot().PhiX()*kR2d,
79 Rot().ThetaY()*kR2d, Rot().PhiY()*kR2d,
80 Rot().ThetaZ()*kR2d, Rot().PhiZ()*kR2d);
82 fX=fCenterV3.X();fY=fCenterV3.Y();fZ=fCenterV3.Z();
84 //______________________________________________________________________________
86 void AliRICHChamber::LocaltoGlobal(Float_t local[3],Float_t global[3])
87 {//Local coordinates to global coordinates transformation
90 pMatrix = fpRotMatrix->GetMatrix();
91 global[0]=local[0]*pMatrix[0]+local[1]*pMatrix[3]+local[2]*pMatrix[6];
92 global[1]=local[0]*pMatrix[1]+local[1]*pMatrix[4]+local[2]*pMatrix[7];
93 global[2]=local[0]*pMatrix[2]+local[1]*pMatrix[5]+local[2]*pMatrix[8];
99 void AliRICHChamber::GlobaltoLocal(Float_t global[3],Float_t local[3])
100 {// Global coordinates to local coordinates transformation
101 TMatrix matrixCopy(3,3);
102 Double_t *pMatrixOrig = fpRotMatrix->GetMatrix();
103 for(Int_t i=0;i<3;i++)
105 for(Int_t j=0;j<3;j++)
106 matrixCopy(j,i)=pMatrixOrig[j+3*i];
109 local[0] = global[0] - fX;
110 local[1] = global[1] - fY;
111 local[2] = global[2] - fZ;
112 local[0]=local[0]*matrixCopy(0,0)+local[1]*matrixCopy(0,1)+local[2]*matrixCopy(0,2);
113 local[1]=local[0]*matrixCopy(1,0)+local[1]*matrixCopy(1,1)+local[2]*matrixCopy(1,2);
114 local[2]=local[0]*matrixCopy(2,0)+local[1]*matrixCopy(2,1)+local[2]*matrixCopy(2,2);
117 void AliRICHChamber::DisIntegration(Float_t eloss, Float_t xhit, Float_t yhit,
118 Int_t& iNpads,Float_t cluster[5][500],ResponseType res)
119 {//Generates pad hits (simulated cluster) using the segmentation and the response model
121 Float_t local[3],global[3];
122 // Width of the integration area
123 Float_t dx=(fResponse->SigmaIntegration())*(fResponse->ChargeSpreadX());
124 Float_t dy=(fResponse->SigmaIntegration())*(fResponse->ChargeSpreadY());
125 // Get pulse height from energy loss and generate feedback photons
128 //z-position of the wires relative to the RICH mother volume (2 mm before CsI) old value: 6.076 ???????
129 local[1]=1.276 + fGeometry->GetGapThickness()/2 - .2;
132 LocaltoGlobal(local,global);
136 //To calculate wire sag, the origin of y-position must be the middle of the photcathode
137 AliRICHSegmentationV0* segmentation = (AliRICHSegmentationV0*) GetSegmentationModel();
140 newy = yhit - segmentation->GetPadPlaneLength()/2;
142 newy = yhit + segmentation->GetPadPlaneLength()/2;
145 qtot = fResponse->IntPH(eloss, newy);
146 fResponse->FeedBackPhotons(global,qtot);
147 }else if(res==kPhoton){
148 qtot = fResponse->IntPH(newy);
149 fResponse->FeedBackPhotons(global,qtot);
154 Float_t qcheck=0, qp=0;
157 for(fSegmentation->FirstPad(xhit, yhit, 0, dx, dy);
158 fSegmentation->MorePads();
159 fSegmentation->NextPad()) {
160 qp= fResponse->IntXY(fSegmentation);
164 cluster[0][iNpads]=qp*qtot;// --- store signal information
165 cluster[1][iNpads]=fSegmentation->Ix();
166 cluster[2][iNpads]=fSegmentation->Iy();
167 cluster[3][iNpads]=fSegmentation->ISector();
171 }//void AliRICHChamber::DisIntegration(...
172 //__________________________________________________________________________________________________
173 void AliRICHChamber::GenerateTresholds()
174 {//Generates random treshold charges for all pads
175 Int_t nx = fSegmentation->Npx();
176 Int_t ny = fSegmentation->Npy();
178 fTresh = new AliRICHTresholdMap(fSegmentation);
179 for(Int_t i=-nx/2;i<nx/2;i++){
180 for(Int_t j=-ny/2;j<ny/2;j++){
181 Int_t pedestal = (Int_t)(gRandom->Gaus(50, 10));
182 fTresh->SetHit(i,j,pedestal);
185 }//void AliRICHChamber::GenerateTresholds()
186 //__________________________________________________________________________________________________
187 void AliRICHChamber::Print(Option_t *) const
189 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(),
190 Rho(), ThetaD(),PhiD(), X(), Y(), Z(),
191 ThetaXd(),PhiXd(),ThetaYd(),PhiYd(),ThetaZd(),PhiZd());
192 }//void AliRICHChamber::Print(Option_t *option)const
193 //__________________________________________________________________________________________________