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 // **************************************************************************
17 #include "AliHMPIDv1.h" //class header
18 #include "AliHMPIDParam.h" //StepManager()
19 #include "AliHMPIDHit.h" //Hits2SDigs(),StepManager()
20 #include "AliHMPIDDigit.h" //Digits2Raw(), Raw2SDigits()
21 #include "AliRawReader.h" //Raw2SDigits()
22 #include <TVirtualMC.h> //StepManager() for gMC
23 #include <TPDGCode.h> //StepHistory()
24 #include <AliStack.h> //StepManager(),Hits2SDigits()
25 #include <AliLoader.h> //Hits2SDigits()
26 #include <AliRunLoader.h> //Hits2SDigits()
29 #include <AliMC.h> //StepManager()
30 #include <AliRun.h> //CreateMaterials()
31 #include <AliMagF.h> //CreateMaterials()
32 #include <TGeoManager.h> //CreateGeometry()
33 #include <TF1.h> //DefineOpticalProperties()
34 #include <TF2.h> //DefineOpticalProperties()
35 #include <TLorentzVector.h> //IsLostByFresnel()
36 #include <AliCDBManager.h> //CreateMaterials()
37 #include <AliCDBEntry.h> //CreateMaterials()
40 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
41 void AliHMPIDv1::AddAlignableVolumes()const
43 // Associates the symbolic volume name with the corresponding volume path. Interface method from AliModule invoked from AliMC
46 for(Int_t i=AliHMPIDDigit::kMinCh;i<=AliHMPIDDigit::kMaxCh;i++)
47 gGeoManager->SetAlignableEntry(Form("/HMPID/Chamber%i",i),Form("ALIC_1/HMPID_%i",i));
49 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
50 void AliHMPIDv1::CreateMaterials()
52 // Definition of available HMPID materials
55 AliDebug(1,"Start v1 HMPID.");
57 //data from PDG booklet 2002 density [gr/cm^3] rad len [cm] abs len [cm]
58 Float_t aAir[4]={12,14,16,36} , zAir[4]={6,7,8,18} , wAir[4]={0.000124,0.755267,0.231781,0.012827} , dAir=0.00120479; Int_t nAir=4;//mixture 0.9999999
59 Float_t aC6F14[2]={ 12.01 , 18.99} , zC6F14[2]={ 6 , 9} , wC6F14[2]={6 , 14} , dC6F14=1.68 ; Int_t nC6F14=-2;
60 Float_t aSiO2[2]={ 28.09 , 15.99} , zSiO2[2]={14 , 8} , wSiO2[2]={1 , 2} , dSiO2=2.64 ; Int_t nSiO2=-2;
61 Float_t aCH4[2]={ 12.01 , 1.01} , zCH4[2]={ 6 , 1} , wCH4[2]={1 , 4} , dCH4=7.17e-4 ; Int_t nCH4=-2;
62 Float_t aCsI[2]={132.90 ,126.90} , zCsI[2]={55 ,53} , wCsI[2]={1 , 1} , dCsI=0.1 ; Int_t nCsI=-2;
63 Float_t aRoha= 12.01 , zRoha= 6 , dRoha= 0.10 , radRoha= 18.80 , absRoha= 86.3/dRoha; //special material- quazi carbon
64 Float_t aCu= 63.55 , zCu= 29 , dCu= 8.96 , radCu= 1.43 , absCu= 134.9/dCu ;
65 Float_t aW=183.84 , zW= 74 , dW= 19.30 , radW= 0.35 , absW= 185.0/dW ;
66 Float_t aAl= 26.98 , zAl= 13 , dAl= 2.70 , radAl= 8.90 , absAl= 106.4/dAl ;
68 Int_t matId=0; //tmp material id number
69 Int_t unsens = 0, sens=1; //sensitive or unsensitive medium
70 Int_t itgfld = gAlice->Field()->Integ(); //type of field intergration 0 no field -1 user in guswim 1 Runge Kutta 2 helix 3 const field along z
71 Float_t maxfld = gAlice->Field()->Max(); //max field value
72 Float_t tmaxfd = -10.0; //max deflection angle due to magnetic field in one step
73 Float_t deemax = - 0.2; //max fractional energy loss in one step
74 Float_t stemax = - 0.1; //mas step allowed [cm]
75 Float_t epsil = 0.001; //abs tracking precision [cm]
76 Float_t stmin = - 0.001; //min step size [cm] in continius process transport, negative value: choose it automatically
77 AliMixture(++matId,"Air" ,aAir ,zAir ,dAir ,nAir ,wAir ); AliMedium(kAir ,"Air" ,matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
78 AliMixture(++matId,"C6F14",aC6F14,zC6F14,dC6F14,nC6F14,wC6F14); AliMedium(kC6F14,"C6F14",matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
79 AliMixture(++matId,"SiO2" ,aSiO2 ,zSiO2 ,dSiO2 ,nSiO2 ,wSiO2 ); AliMedium(kSiO2 ,"SiO2" ,matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
80 AliMixture(++matId,"CH4" ,aCH4 ,zCH4 ,dCH4 ,nCH4 ,wCH4 ); AliMedium(kCH4 ,"CH4" ,matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
81 AliMixture(++matId,"CsI" ,aCsI ,zCsI ,dCsI ,nCsI ,wCsI ); AliMedium(kCsI ,"CsI" ,matId, sens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);//sensitive
83 AliMaterial(++matId,"Roha",aRoha,zRoha,dRoha,radRoha,absRoha); AliMedium(kRoha,"Roha", matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
84 AliMaterial(++matId,"Cu" ,aCu ,zCu ,dCu ,radCu ,absCu ); AliMedium(kCu ,"Cu" , matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
85 AliMaterial(++matId,"W" ,aW ,zW ,dW ,radW ,absW ); AliMedium(kW ,"W" , matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
86 AliMaterial(++matId,"Al" ,aAl ,zAl ,dAl ,radAl ,absAl ); AliMedium(kAl ,"Al" , matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
88 DefineOpticalProperties();
89 }//void AliHMPID::CreateMaterials()
90 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
91 void AliHMPIDv1::CreateGeometry()
93 //Creates detailed geometry simulation (currently GEANT volumes tree)
94 AliDebug(1,"Start main.");
95 if(!gMC->IsRootGeometrySupported()) return;
97 Double_t cm=1,mm=0.1*cm,mkm=0.001*mm,dx,dy,dz;//default is cm
99 TGeoVolume *pRich=gGeoManager->MakeBox("HMPID",gGeoManager->GetMedium("HMPID_CH4"),dx=(6*mm+1681*mm+6*mm)/2, //main HMPID volume
100 dy=(6*mm+1466*mm+6*mm)/2,
101 dz=(80*mm+40*mm)*2/2); //x,y taken from 2033P1 z from p84 TDR
102 for(Int_t iCh=AliHMPIDDigit::kMinCh;iCh<=AliHMPIDDigit::kMaxCh;iCh++){//place 7 chambers
103 TGeoHMatrix *pMatrix=new TGeoHMatrix;
104 AliHMPIDParam::IdealPosition(iCh,pMatrix);
105 gGeoManager->GetVolume("ALIC")->AddNode(pRich,iCh,pMatrix);
109 Int_t matrixIdReturn=0; //matrix id returned by AliMatrix
110 //Pad Panel frame 6 sectors
111 par[0]=648*mm/2;par[1]= 411*mm/2;par[2]=40 *mm/2;gMC->Gsvolu("Rppf" ,"BOX ",(*fIdtmed)[kAl] ,par,3);//PPF 2001P2 inner size of the slab by 1mm more
112 par[0]=181*mm/2;par[1]=89.25*mm/2;par[2]=38.3*mm/2;gMC->Gsvolu("RppfLarge","BOX ",(*fIdtmed)[kAir] ,par,3);//large whole
113 par[0]=114*mm/2;par[1]=89.25*mm/2;par[2]=38.3*mm/2;gMC->Gsvolu("RppfSmall","BOX ",(*fIdtmed)[kAir] ,par,3);//small whole
114 par[0]=644*mm/2;par[1]= 407*mm/2;par[2]= 1.7*mm/2;gMC->Gsvolu("Rpc" ,"BOX ",(*fIdtmed)[kCsI] ,par,3);//by 0.2 mm more then actual size (PCB 2006P1)
116 gMC->Gspos("Rppf",0,"HMPID", -335*mm, -433*mm, 8*cm+20*mm, 0,"ONLY");//F1 2040P1 z p.84 TDR
117 gMC->Gspos("Rppf",1,"HMPID", +335*mm, -433*mm, 8*cm+20*mm, 0,"ONLY");
118 gMC->Gspos("Rppf",2,"HMPID", -335*mm, 0*mm, 8*cm+20*mm, 0,"ONLY");
119 gMC->Gspos("Rppf",3,"HMPID", +335*mm, 0*mm, 8*cm+20*mm, 0,"ONLY");
120 gMC->Gspos("Rppf",4,"HMPID", -335*mm, +433*mm, 8*cm+20*mm, 0,"ONLY");
121 gMC->Gspos("Rppf",5,"HMPID", +335*mm, +433*mm, 8*cm+20*mm, 0,"ONLY");
122 gMC->Gspos("Rpc" ,1,"Rppf", 0*mm, 0*mm, -19.15*mm, 0,"ONLY");//PPF 2001P2
123 gMC->Gspos("RppfLarge",1,"Rppf", -224.5*mm, -151.875*mm, 0.85*mm, 0,"ONLY");
124 gMC->Gspos("RppfLarge",2,"Rppf", -224.5*mm, - 50.625*mm, 0.85*mm, 0,"ONLY");
125 gMC->Gspos("RppfLarge",3,"Rppf", -224.5*mm, + 50.625*mm, 0.85*mm, 0,"ONLY");
126 gMC->Gspos("RppfLarge",4,"Rppf", -224.5*mm, +151.875*mm, 0.85*mm, 0,"ONLY");
127 gMC->Gspos("RppfSmall",1,"Rppf", - 65.0*mm, -151.875*mm, 0.85*mm, 0,"ONLY");
128 gMC->Gspos("RppfSmall",2,"Rppf", - 65.0*mm, - 50.625*mm, 0.85*mm, 0,"ONLY");
129 gMC->Gspos("RppfSmall",3,"Rppf", - 65.0*mm, + 50.625*mm, 0.85*mm, 0,"ONLY");
130 gMC->Gspos("RppfSmall",4,"Rppf", - 65.0*mm, +151.875*mm, 0.85*mm, 0,"ONLY");
131 gMC->Gspos("RppfSmall",5,"Rppf", + 65.0*mm, -151.875*mm, 0.85*mm, 0,"ONLY");
132 gMC->Gspos("RppfSmall",6,"Rppf", + 65.0*mm, - 50.625*mm, 0.85*mm, 0,"ONLY");
133 gMC->Gspos("RppfSmall",7,"Rppf", + 65.0*mm, + 50.625*mm, 0.85*mm, 0,"ONLY");
134 gMC->Gspos("RppfSmall",8,"Rppf", + 65.0*mm, +151.875*mm, 0.85*mm, 0,"ONLY");
135 gMC->Gspos("RppfLarge",5,"Rppf", +224.5*mm, -151.875*mm, 0.85*mm, 0,"ONLY");
136 gMC->Gspos("RppfLarge",6,"Rppf", +224.5*mm, - 50.625*mm, 0.85*mm, 0,"ONLY");
137 gMC->Gspos("RppfLarge",7,"Rppf", +224.5*mm, + 50.625*mm, 0.85*mm, 0,"ONLY");
138 gMC->Gspos("RppfLarge",8,"Rppf", +224.5*mm, +151.875*mm, 0.85*mm, 0,"ONLY");
139 //Gap - anod wires 6 copies to HMPID
140 par[0]=648*mm/2;par[1]= 411*mm/2 ;par[2]=4.45*mm/2;gMC->Gsvolu("Rgap","BOX ",(*fIdtmed)[kCH4] ,par,3);//xy as PPF 2001P2 z WP 2099P1
141 par[0]= 0*mm ;par[1]= 20*mkm/2 ;par[2]= 648*mm/2;gMC->Gsvolu("Rano","TUBE",(*fIdtmed)[kW] ,par,3);//WP 2099P1 z = gap x PPF 2001P2
142 AliMatrix(matrixIdReturn,180,0, 90,90, 90,0); //wires along x
144 gMC->Gspos("Rgap",0,"HMPID", -335*mm, -433*mm,8*cm-2.225*mm, 0,"ONLY"); //F1 2040P1 z WP 2099P1
145 gMC->Gspos("Rgap",1,"HMPID", +335*mm, -433*mm,8*cm-2.225*mm, 0,"ONLY");
146 gMC->Gspos("Rgap",2,"HMPID", -335*mm, 0*mm,8*cm-2.225*mm, 0,"ONLY");
147 gMC->Gspos("Rgap",3,"HMPID", +335*mm, 0*mm,8*cm-2.225*mm, 0,"ONLY");
148 gMC->Gspos("Rgap",4,"HMPID", -335*mm, +433*mm,8*cm-2.225*mm, 0,"ONLY");
149 gMC->Gspos("Rgap",5,"HMPID", +335*mm, +433*mm,8*cm-2.225*mm, 0,"ONLY");
150 for(int i=1;i<=96;i++)
151 gMC->Gspos("Rano",i,"Rgap", 0*mm, -411/2*mm+i*4*mm, 0.185*mm, matrixIdReturn,"ONLY"); //WP 2099P1
152 //Defines radiators geometry
153 par[0]=1330*mm/2 ;par[1]= 413*mm/2 ;par[2]= 24*mm/2; gMC->Gsvolu("Rrad" ,"BOX ",(*fIdtmed)[kC6F14] ,par,3); // Rad 2011P1
154 par[0]=1330*mm/2 ;par[1]= 413*mm/2 ;par[2]= 4*mm/2; gMC->Gsvolu("RradFront" ,"BOX ",(*fIdtmed)[kRoha] ,par,3); //front
155 par[0]=1330*mm/2 ;par[1]= 413*mm/2 ;par[2]= 5*mm/2; gMC->Gsvolu("RradWin" ,"BOX ",(*fIdtmed)[kSiO2] ,par,3); //window
156 par[0]=1330*mm/2 ;par[1]= 5*mm/2 ;par[2]= 15*mm/2; gMC->Gsvolu("RradLong" ,"BOX ",(*fIdtmed)[kRoha] ,par,3); //long side
157 par[0]= 10*mm/2 ;par[1]= 403*mm/2 ;par[2]= 15*mm/2; gMC->Gsvolu("RradShort" ,"BOX ",(*fIdtmed)[kRoha] ,par,3); //short side
158 par[0]= 0 ;par[1]= 10*mm/2 ;par[2]= 15*mm/2; gMC->Gsvolu("RradSpacer","TUBE",(*fIdtmed)[kSiO2] ,par,3); //spacer
160 gMC->Gspos("Rrad",1,"HMPID", 0*mm,-434*mm, -12*mm, 0,"ONLY"); //3 radiators to HMPID
161 gMC->Gspos("Rrad",2,"HMPID", 0*mm, 0*mm, -12*mm, 0,"ONLY");
162 gMC->Gspos("Rrad",3,"HMPID", 0*mm,+434*mm, -12*mm, 0,"ONLY");
163 gMC->Gspos("RradFront",1,"Rrad", 0*mm, 0*mm, -10.0*mm, 0,"ONLY"); //front cover
164 gMC->Gspos("RradWin" ,1,"Rrad", 0*mm, 0*mm, 9.5*mm, 0,"ONLY"); //quartz window (back cover)
165 gMC->Gspos("RradLong" ,1,"Rrad", 0*mm,-204*mm, -0.5*mm, 0,"ONLY"); //long side
166 gMC->Gspos("RradLong" ,2,"Rrad", 0*mm,+204*mm, -0.5*mm, 0,"ONLY"); //long side
167 gMC->Gspos("RradShort",1,"Rrad",-660*mm, 0*mm, -0.5*mm, 0,"ONLY"); //short side
168 gMC->Gspos("RradShort",2,"Rrad",+660*mm, 0*mm, -0.5*mm, 0,"ONLY"); //short side
170 for(int j=0;j<10;j++)
171 gMC->Gspos("RradSpacer",10*i+j,"Rrad",-1330*mm/2+116*mm+j*122*mm,(i-1)*105*mm,-0.5*mm,0,"ONLY");//spacers
172 //Defines SandBox geometry
173 par[0]=1419*mm/2 ;par[1]=1378*mm/2;par[2]=50.5*mm/2; gMC->Gsvolu("Rsb" ,"BOX ",(*fIdtmed)[kAir] ,par,3); //2072P1
174 par[0]=1419*mm/2 ;par[1]=1378*mm/2;par[2]= 0.5*mm/2; gMC->Gsvolu("RsbCover","BOX ",(*fIdtmed)[kAl] ,par,3); //cover
175 par[0]=1359*mm/2 ;par[1]=1318*mm/2;par[2]=49.5*mm/2; gMC->Gsvolu("RsbComb" ,"BOX ",(*fIdtmed)[kRoha] ,par,3); //honeycomb structure
177 gMC->Gspos("Rsb",1,"HMPID", 0*mm, 0*mm, -73.75*mm, 0,"ONLY"); //p.84 TDR sandbox to rich
178 gMC->Gspos("RsbComb" ,1,"Rsb", 0*mm, 0*mm, 0*mm, 0,"ONLY"); //2072P1 honeycomv to sandbox
179 gMC->Gspos("RsbCover",1,"Rsb", 0*mm, 0*mm, +25*mm, 0,"ONLY"); //cover to sandbox
180 gMC->Gspos("RsbCover",2,"Rsb", 0*mm, 0*mm, -25*mm, 0,"ONLY"); //cover to sandbox
181 AliDebug(1,"Stop v1. HMPID option");
183 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
184 void AliHMPIDv1::Init()
186 // This methode defines ID for sensitive volumes, i.e. such geometry volumes for which there are if(gMC->CurrentVolID()==XXX) statements in StepManager()
189 AliDebug(1,"Start v1 HMPID.");
190 fIdRad = gMC->VolId("Rrad");
191 fIdWin = gMC->VolId("RradWin");
192 fIdPc = gMC->VolId("Rpc");
193 fIdAmpGap = gMC->VolId("Rgap");
194 fIdProxGap = gMC->VolId("Rgap");
196 AliDebug(1,"Stop v1 HMPID.");
198 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
199 void AliHMPIDv1::DefineOpticalProperties()
201 // Optical properties definition.
202 const Int_t kNbins=30; //number of photon energy points
203 Float_t emin=5.5,emax=8.5; //Photon energy range,[eV]
204 Float_t aEckov [kNbins];
205 Float_t aAbsRad[kNbins], aAbsWin[kNbins], aAbsGap[kNbins], aAbsMet[kNbins];
206 Float_t aIdxRad[kNbins], aIdxWin[kNbins], aIdxGap[kNbins], aIdxMet[kNbins], aIdxPc[kNbins];
207 Float_t aQeAll [kNbins], aQePc [kNbins];
209 TF2 *pRaIF=new TF2("HidxRad","sqrt(1+0.554*(1239.84/x)^2/((1239.84/x)^2-5796)-0.0005*(y-20))" ,emin,emax,0,50); //DiMauro mail temp 0-50 degrees C
210 TF1 *pWiIF=new TF1("HidxWin","sqrt(1+46.411/(10.666*10.666-x*x)+228.71/(18.125*18.125-x*x))" ,emin,emax); //SiO2 idx TDR p.35
211 TF1 *pGaIF=new TF1("HidxGap","1+0.12489e-6/(2.62e-4 - x*x/1239.84/1239.84)" ,emin,emax); //?????? from where
213 TF1 *pRaAF=new TF1("HabsRad","(x<7.8)*(gaus+gaus(3))+(x>=7.8)*0.0001" ,emin,emax); //fit from DiMauro data 28.10.03
214 pRaAF->SetParameters(3.20491e16,-0.00917890,0.742402,3035.37,4.81171,0.626309);
215 TF1 *pWiAF=new TF1("HabsWin","(x<8.2)*(818.8638-301.0436*x+36.89642*x*x-1.507555*x*x*x)+(x>=8.2)*0.0001" ,emin,emax); //fit from DiMauro data 28.10.03
216 TF1 *pGaAF=new TF1("HabsGap","(x<7.75)*6512.399+(x>=7.75)*3.90743e-2/(-1.655279e-1+6.307392e-2*x-8.011441e-3*x*x+3.392126e-4*x*x*x)",emin,emax); //????? from where
218 TF1 *pQeF =new TF1("Hqe" ,"0+(x>6.07267)*0.344811*(1-exp(-1.29730*(x-6.07267)))" ,emin,emax); //fit from DiMauro data 28.10.03
220 for(Int_t i=0;i<kNbins;i++){
221 Float_t eV=emin+0.1*i; //Ckov energy in eV
222 aEckov [i] =1e-9*eV; //Ckov energy in GeV
223 aAbsRad[i]=pRaAF->Eval(eV); aIdxRad[i]=1.292;//pRaIF->Eval(eV,20); //Simulation for 20 degress C
224 aAbsWin[i]=pWiAF->Eval(eV); aIdxWin[i]=1.5787;//pWiIF->Eval(eV);
225 aAbsGap[i]=pGaAF->Eval(eV); aIdxGap[i]=1.0005;//pGaIF->Eval(eV);
226 aQeAll[i] =1; //QE for all other materials except for PC must be 1.
227 aAbsMet[i] =0.0001; aIdxMet[i]=0; //metal ref idx must be 0 in order to reflect photon
228 aIdxPc [i]=1; aQePc [i]=pQeF->Eval(eV); //PC ref idx must be 1 in order to apply photon to QE conversion
231 gMC->SetCerenkov((*fIdtmed)[kC6F14] , kNbins, aEckov, aAbsRad , aQeAll , aIdxRad );
232 gMC->SetCerenkov((*fIdtmed)[kSiO2] , kNbins, aEckov, aAbsWin , aQeAll , aIdxWin );
233 gMC->SetCerenkov((*fIdtmed)[kCH4] , kNbins, aEckov, aAbsGap , aQeAll , aIdxGap );
234 gMC->SetCerenkov((*fIdtmed)[kCu] , kNbins, aEckov, aAbsMet , aQeAll , aIdxMet );
235 gMC->SetCerenkov((*fIdtmed)[kW] , kNbins, aEckov, aAbsMet , aQeAll , aIdxMet ); //n=0 means reflect photons
236 gMC->SetCerenkov((*fIdtmed)[kCsI] , kNbins, aEckov, aAbsMet , aQePc , aIdxPc ); //n=1 means convert photons
237 gMC->SetCerenkov((*fIdtmed)[kAl] , kNbins, aEckov, aAbsMet , aQeAll , aIdxMet );
238 delete pRaAF;delete pWiAF;delete pGaAF; delete pRaIF; delete pWiIF; delete pGaIF; delete pQeF;
240 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
241 Bool_t AliHMPIDv1::IsLostByFresnel()
243 // Calculate probability for the photon to be lost by Fresnel reflection.
245 Double_t mom[3],localMom[3];
246 gMC->TrackMomentum(p4); mom[0]=p4(1); mom[1]=p4(2); mom[2]=p4(3);
247 localMom[0]=0; localMom[1]=0; localMom[2]=0;
248 gMC->Gmtod(mom,localMom,2);
249 Double_t localTc = localMom[0]*localMom[0]+localMom[2]*localMom[2];
250 Double_t localTheta = TMath::ATan2(TMath::Sqrt(localTc),localMom[1]);
251 Double_t cotheta = TMath::Abs(TMath::Cos(localTheta));
252 if(gMC->GetRandom()->Rndm() < Fresnel(p4.E()*1e9,cotheta,1)){
253 AliDebug(1,"Photon lost");
258 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
259 void AliHMPIDv1::GenFee(Float_t qtot)
261 // Generate FeedBack photons for the current particle. To be invoked from StepManager().
262 // eloss=0 means photon so only pulse height distribution is to be analysed.
264 gMC->TrackPosition(x4);
265 Int_t iNphotons=gMC->GetRandom()->Poisson(0.02*qtot); //# of feedback photons is proportional to the charge of hit
266 AliDebug(1,Form("N photons=%i",iNphotons));
268 Float_t cthf, phif, enfp = 0, sthf, e1[3], e2[3], e3[3], vmod, uswop,dir[3], phi,pol[3], mom[4];
270 for(Int_t i=0;i<iNphotons;i++){//feedbacks loop
272 gMC->GetRandom()->RndmArray(2,ranf); //Sample direction
275 sthf = TMath::Sqrt((1 - cthf) * (1 + cthf));
276 phif = ranf[1] * 2 * TMath::Pi();
278 if(Double_t randomNumber=gMC->GetRandom()->Rndm()<=0.57)
280 else if(randomNumber<=0.7)
286 dir[0] = sthf * TMath::Sin(phif); dir[1] = cthf; dir[2] = sthf * TMath::Cos(phif);
287 gMC->Gdtom(dir, mom, 2);
288 mom[0]*=enfp; mom[1]*=enfp; mom[2]*=enfp;
289 mom[3] = TMath::Sqrt(mom[0]*mom[0]+mom[1]*mom[1]+mom[2]*mom[2]);
292 e1[0]= 0; e1[1]=-dir[2]; e1[2]= dir[1];
293 e2[0]=-dir[1]; e2[1]= dir[0]; e2[2]= 0;
294 e3[0]= dir[1]; e3[1]= 0; e3[2]=-dir[0];
297 for(j=0;j<3;j++) vmod+=e1[j]*e1[j];
298 if (!vmod) for(j=0;j<3;j++) {
304 for(j=0;j<3;j++) vmod+=e2[j]*e2[j];
305 if (!vmod) for(j=0;j<3;j++) {
311 vmod=0; for(j=0;j<3;j++) vmod+=e1[j]*e1[j]; vmod=TMath::Sqrt(1/vmod); for(j=0;j<3;j++) e1[j]*=vmod;
312 vmod=0; for(j=0;j<3;j++) vmod+=e2[j]*e2[j]; vmod=TMath::Sqrt(1/vmod); for(j=0;j<3;j++) e2[j]*=vmod;
314 phi = gMC->GetRandom()->Rndm()* 2 * TMath::Pi();
315 for(j=0;j<3;j++) pol[j]=e1[j]*TMath::Sin(phi)+e2[j]*TMath::Cos(phi);
316 gMC->Gdtom(pol, pol, 2);
317 Int_t outputNtracksStored;
318 gAlice->GetMCApp()->PushTrack(1, //transport
319 gAlice->GetMCApp()->GetCurrentTrackNumber(),//parent track
321 mom[0],mom[1],mom[2],mom[3], //track momentum
322 x4.X(),x4.Y(),x4.Z(),x4.T(), //track origin
323 pol[0],pol[1],pol[2], //polarization
324 kPFeedBackPhoton, //process ID
325 outputNtracksStored, //on return how many new photons stored on stack
329 }//GenerateFeedbacks()
330 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
331 void AliHMPIDv1::Hits2SDigits()
333 // Interface method ivoked from AliSimulation to create a list of sdigits corresponding to list of hits. Every hit generates one or more sdigits.
336 AliDebug(1,"Start.");
337 for(Int_t iEvt=0;iEvt < GetLoader()->GetRunLoader()->GetNumberOfEvents();iEvt++){ //events loop
338 GetLoader()->GetRunLoader()->GetEvent(iEvt); //get next event
340 if(!GetLoader()->TreeH()) {GetLoader()->LoadHits(); }
341 if(!GetLoader()->TreeS()) {GetLoader()->MakeTree("S"); MakeBranch("S");}//to
343 for(Int_t iEnt=0;iEnt<GetLoader()->TreeH()->GetEntries();iEnt++){//prims loop
344 GetLoader()->TreeH()->GetEntry(iEnt);
345 Hit2Sdi(Hits(),SdiLst());
347 GetLoader()->TreeS()->Fill();
348 GetLoader()->WriteSDigits("OVERWRITE");
351 GetLoader()->UnloadHits();
352 GetLoader()->UnloadSDigits();
355 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
356 void AliHMPIDv1::Hit2Sdi(TClonesArray *pHitLst,TClonesArray *pSdiLst)
358 // Converts list of hits to list of sdigits.
359 // Arguments: pHitLst - list of hits provided not empty
360 // pSDigLst - list of sdigits where to store the results
362 for(Int_t iHit=0;iHit<pHitLst->GetEntries();iHit++){ //hits loop
363 AliHMPIDHit *pHit=(AliHMPIDHit*)pHitLst->At(iHit); //get pointer to current hit
364 pHit->Hit2Sdi(pSdiLst); //convert this hit to list of sdigits
367 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
368 void AliHMPIDv1::Digits2Raw()
370 // Interface method invoked by AliSimulation to create raw data streams from digits. Events loop is done in AliSimulation
373 AliDebug(1,"Start.");
374 GetLoader()->LoadDigits();
375 TTree * treeD = GetLoader()->TreeD();
377 AliError("No digits tree!");
382 AliHMPIDDigit::WriteRaw(DigLst());
384 GetLoader()->UnloadDigits();
387 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
388 Float_t AliHMPIDv1::Fresnel(Float_t ene,Float_t pdoti, Bool_t pola)
390 // Correction for Fresnel ???????????
391 // Arguments: ene - photon energy [GeV],
392 // PDOTI=COS(INC.ANG.), PDOTR=COS(POL.PLANE ROT.ANG.)
394 Float_t en[36] = {5.0,5.1,5.2,5.3,5.4,5.5,5.6,5.7,5.8,5.9,6.0,6.1,6.2,
395 6.3,6.4,6.5,6.6,6.7,6.8,6.9,7.0,7.1,7.2,7.3,7.4,7.5,7.6,7.7,
396 7.8,7.9,8.0,8.1,8.2,8.3,8.4,8.5};
397 Float_t csin[36] = {2.14,2.21,2.33,2.48,2.76,2.97,2.99,2.59,2.81,3.05,
398 2.86,2.53,2.55,2.66,2.79,2.96,3.18,3.05,2.84,2.81,2.38,2.11,
399 2.01,2.13,2.39,2.73,3.08,3.15,2.95,2.73,2.56,2.41,2.12,1.95,
401 Float_t csik[36] = {0.,0.,0.,0.,0.,0.196,0.408,0.208,0.118,0.49,0.784,0.543,
402 0.424,0.404,0.371,0.514,0.922,1.102,1.139,1.376,1.461,1.253,0.878,
403 0.69,0.612,0.649,0.824,1.347,1.571,1.678,1.763,1.857,1.824,1.824,
406 Int_t j=Int_t(xe*10)-49;
407 Float_t cn=csin[j]+((csin[j+1]-csin[j])/0.1)*(xe-en[j]);
408 Float_t ck=csik[j]+((csik[j+1]-csik[j])/0.1)*(xe-en[j]);
410 //FORMULAE FROM HANDBOOK OF OPTICS, 33.23 OR
411 //W.R. HUNTER, J.O.S.A. 54 (1964),15 , J.O.S.A. 55(1965),1197
413 Float_t sinin=TMath::Sqrt(1-pdoti*pdoti);
414 Float_t tanin=sinin/pdoti;
416 Float_t c1=cn*cn-ck*ck-sinin*sinin;
417 Float_t c2=4*cn*cn*ck*ck;
418 Float_t aO=TMath::Sqrt(0.5*(TMath::Sqrt(c1*c1+c2)+c1));
419 Float_t b2=0.5*(TMath::Sqrt(c1*c1+c2)-c1);
421 Float_t rs=((aO-pdoti)*(aO-pdoti)+b2)/((aO+pdoti)*(aO+pdoti)+b2);
422 Float_t rp=rs*((aO-sinin*tanin)*(aO-sinin*tanin)+b2)/((aO+sinin*tanin)*(aO+sinin*tanin)+b2);
425 //CORRECTION FACTOR FOR SURFACE ROUGHNESS
426 //B.J. STAGG APPLIED OPTICS, 30(1991),4113
429 Float_t lamb=1240/ene;
432 Float_t rO=TMath::Exp(-(4*TMath::Pi()*pdoti*sigraf/lamb)*(4*TMath::Pi()*pdoti*sigraf/lamb));
436 Float_t pdotr=0.8; //DEGREE OF POLARIZATION : 1->P , -1->S
437 fresn=0.5*(rp*(1+pdotr)+rs*(1-pdotr));
445 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
446 void AliHMPIDv1::Print(Option_t *option)const
449 TObject::Print(option);
450 }//void AliHMPID::Print(Option_t *option)const
451 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
452 Bool_t AliHMPIDv1::Raw2SDigits(AliRawReader *pRR)
454 // Interface methode ivoked from AliSimulation to create a list of sdigits from raw digits. Events loop is done in AliSimulation
455 // Arguments: pRR- raw reader
456 // Returns: kTRUE on success (currently ignored in AliSimulation::ConvertRaw2SDigits())
457 AliHMPIDDigit sdi; //tmp sdigit, raw digit will be converted to it
459 if(!GetLoader()->TreeS()) {MakeTree("S"); MakeBranch("S");}
461 TClonesArray *pSdiLst=SdiLst(); Int_t iSdiCnt=0; //tmp list of sdigits for all chambers
462 pRR->Select("HMPID",0,13);//select all HMPID DDL files
464 while(pRR->ReadNextInt(w32)){//raw records loop (in selected DDL files)
465 UInt_t ddl=pRR->GetDDLID(); //returns 0,1,2 ... 13
467 new((*pSdiLst)[iSdiCnt++]) AliHMPIDDigit(sdi); //add this digit to the tmp list
469 GetLoader()->TreeS()->Fill(); GetLoader()->WriteSDigits("OVERWRITE");//write out sdigits
473 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
474 void AliHMPIDv1::StepCount()
476 // Count number of ckovs created
478 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
479 void AliHMPIDv1::StepHistory()
481 // This methode is invoked from StepManager() in order to print out
483 const char *sParticle;
484 switch(gMC->TrackPid()){
485 case kProton: sParticle="PROTON" ;break;
486 case kNeutron: sParticle="neutron" ;break;
487 case kGamma: sParticle="gamma" ;break;
488 case 50000050: sParticle="CKOV" ;break;
489 case kPi0: sParticle="Pi0" ;break;
490 case kPiPlus: sParticle="Pi+" ;break;
491 case kPiMinus: sParticle="Pi-" ;break;
492 case kElectron: sParticle="electron" ;break;
493 default: sParticle="not known" ;break;
496 TString flag="fanny combination";
497 if(gMC->IsTrackAlive())
498 if(gMC->IsTrackEntering()) flag="enters to";
499 else if(gMC->IsTrackExiting()) flag="exits from";
500 else if(gMC->IsTrackInside()) flag="inside";
502 if(gMC->IsTrackStop()) flag="stoped in";
505 TString path=gMC->CurrentVolName(); path.Prepend("-");path.Prepend(gMC->CurrentVolOffName(1));//current volume and his mother are always there
506 vid=gMC->CurrentVolOffID(2,copy); if(vid) {path.Prepend("-");path.Prepend(gMC->VolName(vid));}
507 vid=gMC->CurrentVolOffID(3,copy); if(vid) {path.Prepend("-");path.Prepend(gMC->VolName(vid));}
509 Printf("Step %i: %s (%i) %s %s m=%.6f GeV q=%.1f dEdX=%.4f",iStepN,sParticle,gMC->TrackPid(),flag.Data(),path.Data(),gMC->TrackMass(),gMC->TrackCharge(),gMC->Edep()*1e9);
511 Printf("Step %i: tid=%i flags alive=%i disap=%i enter=%i exit=%i inside=%i out=%i stop=%i new=%i",
512 iStepN, gAlice->GetMCApp()->GetCurrentTrackNumber(),
513 gMC->IsTrackAlive(), gMC->IsTrackDisappeared(),gMC->IsTrackEntering(), gMC->IsTrackExiting(),
514 gMC->IsTrackInside(),gMC->IsTrackOut(), gMC->IsTrackStop(), gMC->IsNewTrack());
516 Float_t a,z,den,rad,abs; a=z=den=rad=abs=-1;
517 Int_t mid=gMC->CurrentMaterial(a,z,den,rad,abs);
518 Printf("Step %i: id=%i a=%7.2f z=%7.2f den=%9.4f rad=%9.2f abs=%9.2f\n\n",iStepN,mid,a,z,den,rad,abs);
521 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
522 void AliHMPIDv1::StepManager()
524 // Full Step Manager.
527 // StepHistory(); return; //uncomment to print tracks history
528 // StepCount(); return; //uncomment to count photons
530 Int_t copy; //volume copy aka node
533 if((gMC->TrackPid()==50000050||gMC->TrackPid()==50000051)&&gMC->CurrentVolID(copy)==fIdPc){ //photon (Ckov or feedback) hit PC (fIdPc)
534 if(gMC->Edep()>0){ //photon survided QE test i.e. produces electron
535 if(IsLostByFresnel()){ gMC->StopTrack(); return;} //photon lost due to fersnel reflection on PC
536 gMC->CurrentVolOffID(2,copy); //current chamber since geomtry tree is HMPID-Rppf-Rpc
537 Int_t tid= gMC->GetStack()->GetCurrentTrackNumber(); //take TID
538 Int_t pid= gMC->TrackPid(); //take PID
539 Float_t etot= gMC->Etot(); //total hpoton energy, [GeV]
540 Double_t x[3]; gMC->TrackPosition(x[0],x[1],x[2]); //take MARS position at entrance to PC
541 Float_t xl,yl; AliHMPIDParam::Instance()->Mars2Lors(copy,x,xl,yl); //take LORS position
542 new((*fHits)[fNhits++])AliHMPIDHit(copy,etot,pid,tid,xl,yl,x); //HIT for photon, position at P, etot will be set to Q
543 GenFee(etot); //generate feedback photons etot is modified in hit ctor to Q of hit
544 }//photon hit PC and DE >0
547 //Treat charged particles
548 static Float_t eloss; //need to store mip parameters between different steps
549 static Double_t in[3];
550 if(gMC->TrackCharge() && gMC->CurrentVolID(copy)==fIdAmpGap){ //charged particle in amplification gap (fIdAmpGap)
551 if(gMC->IsTrackEntering()||gMC->IsNewTrack()) { //entering or newly created
552 eloss=0; //reset Eloss collector
553 gMC->TrackPosition(in[0],in[1],in[2]); //take position at the entrance
554 }else if(gMC->IsTrackExiting()||gMC->IsTrackStop()||gMC->IsTrackDisappeared()){ //exiting or disappeared
555 eloss +=gMC->Edep(); //take into account last step Eloss
556 gMC->CurrentVolOffID(1,copy); //take current chamber since geometry tree is HMPID-Rgap
557 Int_t tid= gMC->GetStack()->GetCurrentTrackNumber(); //take TID
558 Int_t pid= gMC->TrackPid(); //take PID
559 Double_t out[3]; gMC->TrackPosition(out[0],out[1],out[2]); //take MARS position at exit
560 out[0]=0.5*(out[0]+in[0]); //>
561 out[1]=0.5*(out[1]+in[1]); //take hit position at the anod plane
562 out[2]=0.5*(out[2]+in[2]); //>
563 Float_t xl,yl;AliHMPIDParam::Instance()->Mars2Lors(copy,out,xl,yl); //take LORS position
564 new((*fHits)[fNhits++])AliHMPIDHit(copy,eloss,pid,tid,xl,yl,out); //HIT for MIP, position near anod plane, eloss will be set to Q
565 GenFee(eloss); //generate feedback photons
566 }else //just going inside
567 eloss += gMC->Edep(); //collect this step eloss
570 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++