fea5c6b4c8d17c841d462da7f6c288c12b3816ed
[u/mrichter/AliRoot.git] / HMPID / AliHMPIDv2.cxx
1 // **************************************************************************
2 // * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 // *                                                                        *
4 // * Author: The ALICE Off-line Project.                                    *
5 // * Contributors are mentioned in the code where appropriate.              *
6 // *                                                                        *
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 // **************************************************************************
15
16
17 #include "AliHMPIDv2.h"       //class header
18 #include "AliHMPIDParam.h"    //StepManager()
19 #include "AliHMPIDHit.h"      //Hits2SDigs(),StepManager()
20 #include "AliHMPIDDigit.h"    //Digits2Raw(), Raw2SDigits()
21 #include "AliHMPIDRawStream.h"  //Digits2Raw(), Raw2SDigits()
22 #include "AliRawReader.h"     //Raw2SDigits()
23 #include "AliTrackReference.h"
24 #include <TVirtualMC.h>       //StepManager() for gMC
25 #include <TPDGCode.h>         //StepHistory() 
26 #include <AliStack.h>         //StepManager(),Hits2SDigits()78.6
27 #include <AliLoader.h>        //Hits2SDigits()
28 #include <AliRunLoader.h>     //Hits2SDigits()
29 #include <AliMC.h>            //StepManager()      
30 #include <AliRun.h>           //CreateMaterials()    
31 #include <AliMagF.h>          //CreateMaterials()
32 #include "AliGeomManager.h"   //AddAlignableVolumes()
33 #include <AliCDBEntry.h>      //CreateMaterials()
34 #include <AliCDBManager.h>    //CreateMaterials()
35 #include <TF1.h>              //DefineOpticalProperties()
36 #include <TF2.h>              //DefineOpticalProperties()
37 #include <TGeoGlobalMagField.h>
38 #include <TGeoPhysicalNode.h> //AddAlignableVolumes()
39 #include <TLorentzVector.h>   //IsLostByFresnel() 
40 #include <TTree.h>
41
42 ClassImp(AliHMPIDv2)    
43 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
44 void AliHMPIDv2::AddAlignableVolumes()const
45 {
46 // Associates the symbolic volume name with the corresponding volume path. Interface method from AliModule invoked from AliMC
47 // Arguments: none
48 //   Returns: none   
49
50   AliGeomManager::ELayerID idHMPID = AliGeomManager::kHMPID;
51   Int_t modUID, modnum = 0;
52
53   TGeoHMatrix *pGm = new TGeoHMatrix;
54   Double_t trans[3]={0.5*131.24,0.5*126.16,0};                            //translation from LORS to TGeo RS (half size AllX, half size allY,0)
55   pGm->SetTranslation(trans);
56  
57   Double_t ph[7]={10.,10., 30.,30.,30. ,50.,50};
58
59   for(Int_t iCh=AliHMPIDParam::kMinCh;iCh<=AliHMPIDParam::kMaxCh;iCh++) {
60     modUID = AliGeomManager::LayerToVolUID(idHMPID,modnum++);
61     if(!gGeoManager->SetAlignableEntry(Form("/HMPID/Chamber%i",iCh),Form("ALIC_1/Hmp_%i",iCh),modUID))
62             AliError("AliHMPIDv3::Unable to set alignable entry!!");  //aligment without AliCluster3D
63     //Get Tracking To Local matricies for alignment with AliCluster3D
64     TGeoPNEntry *eCh = gGeoManager->GetAlignableEntryByUID(modUID);
65     TGeoHMatrix *globMatrix = eCh->GetGlobalOrig();
66
67     //Double_t phi = 20.0 * ((iCh+1) / 3) + 10.0;
68     Double_t phi = ph[iCh];
69     TGeoHMatrix *t2l  = new TGeoHMatrix();
70     t2l->RotateZ(phi);
71     t2l->MultiplyLeft(&(globMatrix->Inverse()));
72     eCh->SetMatrix(t2l);
73   }//iCh loop
74 }
75 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
76 void AliHMPIDv2::CreateMaterials()
77 {
78 // Definition of available HMPID materials  
79 // Arguments: none
80 //   Returns: none    
81   AliDebug(1,"Start v2 HMPID.");
82     
83     //clm update material definition later on from Antonello
84     
85 //data from PDG booklet 2002     density [gr/cm^3] rad len [cm] abs len [cm]    
86   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
87   Float_t aC6F14[2]={ 12.01 , 18.99} , zC6F14[2]={ 6 , 9}   , wC6F14[2]={6 , 14} , dC6F14=1.68    ; Int_t nC6F14=-2;
88   Float_t  aSiO2[2]={ 28.09 , 15.99} ,  zSiO2[2]={14 , 8}   ,  wSiO2[2]={1 ,  2} ,  dSiO2=2.64    ; Int_t  nSiO2=-2; 
89   Float_t   aCH4[2]={ 12.01 ,  1.01} ,   zCH4[2]={ 6 , 1}   ,   wCH4[2]={1 ,  4} ,   dCH4=7.17e-4 ; Int_t   nCH4=-2; 
90 // not necessary...PCB properties instead! Float_t   aCsI[2]={132.90 ,126.90} ,   zCsI[2]={55 ,53}   ,   wCsI[2]={1 ,  1} ,   dCsI=0.1     ; Int_t   nCsI=-2; 
91   
92   Float_t     aRoha = 12.01 ,   zRoha =  6 ,  dRoha =  0.10    ,   radRoha = 18.80 , absRoha =  86.3/dRoha; //special material- quasi quartz
93   Float_t       aCu = 63.55 ,   zCu   = 29 ,  dCu   =  8.96    ,   radCu   =  1.43 , absCu   = 134.9/dCu  ;
94   Float_t        aW =183.84 ,   zW    = 74 ,  dW    = 19.30    ,   radW    =  0.35 , absW    = 185.0/dW   ;
95   Float_t       aAl = 26.98 ,   zAl   = 13 ,  dAl   =  2.70    ,   radAl   =  8.90 , absAl   = 106.4/dAl  ;
96   Float_t       aAr = 39.94 ,   zAr   = 18 ,  dAr   =  1.396e-3,   radAr   =  14.0 , absAr   = 117.2/dAr  ;   
97
98     Int_t   matId=0;                           //tmp material id number
99     Int_t   unsens =  0, sens=1;               //sensitive or unsensitive medium
100     Int_t   itgfld = ((AliMagF*)TGeoGlobalMagField::Instance()->GetField())->Integ(); //type of field intergration 0 no field -1 user in guswim 1 Runge Kutta 2 helix 3 const field along z
101     Float_t maxfld = ((AliMagF*)TGeoGlobalMagField::Instance()->GetField())->Max();   //max field value
102     Float_t tmaxfd = -10.0;                    //max deflection angle due to magnetic field in one step
103     Float_t deemax = - 0.2;                    //max fractional energy loss in one step   
104     Float_t stemax = - 0.1;                    //max step allowed [cm]
105     Float_t epsil  =   0.001;                  //abs tracking precision [cm]   
106     Float_t stmin  = - 0.001;                  //min step size [cm] in continius process transport, negative value: choose it automatically
107
108     // PCB copmposed mainly by G10 (Si,C,H,O) -> CsI is negligible (<500nm thick)
109     // So what is called CsI has the optical properties of CsI, but the composition of G-10 (for delta elec, etc production...)
110     
111     Float_t aG10[4] = {28.09,12.01,1.01,16.00};
112     Float_t zG10[4] = {14.,  6.,  1.,  8.};
113     Float_t wG10[4] = {0.129060,0.515016,0.061873,0.294050};
114     Float_t dG10    = 1.7;
115     Int_t   nG10    = 4;
116     
117     AliMixture(++matId,"Air"  ,aAir  ,zAir  ,dAir  ,nAir  ,wAir  ); AliMedium(kAir  ,"Air"  ,matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
118     AliMixture(++matId,"C6F14",aC6F14,zC6F14,dC6F14,nC6F14,wC6F14); AliMedium(kC6F14,"C6F14",matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);      
119     AliMixture(++matId,"SiO2" ,aSiO2 ,zSiO2 ,dSiO2 ,nSiO2 ,wSiO2 ); AliMedium(kSiO2 ,"SiO2" ,matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);    
120     AliMixture(++matId,"CH4"  ,aCH4  ,zCH4  ,dCH4  ,nCH4  ,wCH4  ); AliMedium(kCH4  ,"CH4"  ,matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);  
121 //    AliMixture(++matId,"CsI"  ,aCsI  ,zCsI  ,dCsI  ,nCsI  ,wCsI  ); AliMedium(kCsI  ,"CsI"  ,matId,   sens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);//sensitive
122     AliMixture(++matId,"CsI+PCB",aG10  , zG10, dG10,nG10   ,wG10   ); AliMedium(kCsI  ,"CsI"  ,matId,   sens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);//sensitive
123
124     AliMixture(++matId ,"Neo" ,aSiO2 ,zSiO2 ,dSiO2 ,nSiO2 ,wSiO2 ); AliMedium(kNeo  ,"Neo"  ,matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin); //clm neoceram
125     AliMaterial(++matId,"Roha",aRoha,zRoha,dRoha,radRoha,absRoha);  AliMedium(kRoha ,"Roha" ,matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin); //Roha->honeycomb
126
127
128     AliMaterial(++matId,"Cu"  ,aCu  ,zCu  ,dCu  ,radCu  ,absCu  );  AliMedium(kCu  ,"Cu"  , matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
129     AliMaterial(++matId,"W"   ,aW   ,zW   ,dW   ,radW   ,absW   );  AliMedium(kW   ,"W"   , matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
130     AliMaterial(++matId,"Al"  ,aAl  ,zAl  ,dAl  ,radAl  ,absAl  );  AliMedium(kAl  ,"Al"  , matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
131     AliMaterial(++matId,"Ar"  ,aAr  ,zAr  ,dAr  ,radAr  ,absAr  );  AliMedium(kAr  ,"Ar"  , matId, unsens, itgfld, maxfld, tmaxfd, stemax, deemax, epsil, stmin);
132
133     //InitProperties();
134         
135 }//void AliHMPID::CreateMaterials()
136 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
137 //void AliHMPIDv2::InitProperties()
138 //{
139 /*
140 * HMPID
141 * ====
142 *
143 *       GAM   ELEC  NHAD   CHAD  MUON  EBREM MUHAB  EDEL  MUDEL MUPA ANNI BREM COMP DCAY DRAY HADR LOSS MULS PAIR PHOT RAYL
144 * Quarz Window        (>1000 keV delta-electrons)
145 HMPID  3  1.e-4 1.e-4 1.e-4  -1.   1.e-4 -1.   -1.    1.e-3 1.e-3 -1.  -1   -1   -1   -1   1    -1   1    -1   -1   -1   -1 
146 * Freon Radiator      (>  500 keV delta-electrons)
147 HMPID  4  1.e-4 1.e-4 1.e-4  -1.   1.e-4 -1.   -1.    5.e-4 5.e-4 -1.  -1   -1   -1   -1   1    -1   1    -1   -1   -1   -1 
148 * Methane Gap         (>  100 keV delta-electrons)
149 HMPID  5  5.e-5 1.e-5 1.e-4 -1.   1.e-4 -1.   -1.     1.e-4 1.e-4 -1.  -1   -1   -1   -1   1    -1   1    -1   -1   -1   -1 
150 * Sensitive Volume    (>  50 keV delta-electrons)
151 HMPID  9  1.e-5 1.e-5 1.e-4  -1.   1.e-4 -1.   -1.    5.e-5 5.e-5 -1.  -1   -1   -1   -1   1    -1   1    -1   -1   -1   -1 
152 * CSI    (>  50 keV delta-electrons)
153 HMPID  6  1.e-5 1.e-5 1.e-4  -1.   1.e-4 -1.   -1.    5.e-5 5.e-5 -1.  -1   -1   -1   -1   1    -1   1    -1   -1   -1   -1 
154 * PCB backplane   (>  50 keV delta-electrons)
155 HMPID 12  1.e-5 1.e-5 1.e-4  -1.   1.e-4 -1.   -1.    5.e-5 5.e-5 -1.  -1   -1   -1   -1   1    -1   1    -1   -1   -1   -1 
156
157     Int_t *idtmed = fIdtmed->GetArray();
158     Int_t imed;
159     
160     imed = kSiO2;   // * Quarz Window        (>1000 keV delta-electrons)
161     gMC->Gstpar(idtmed[imed], "CUTGAM",1.e-4);
162     gMC->Gstpar(idtmed[imed], "CUTELE",1.e-4);
163     gMC->Gstpar(idtmed[imed], "CUTNEU",1.e-4);
164     gMC->Gstpar(idtmed[imed], "CUTMUO",1.e-4);    
165     gMC->Gstpar(idtmed[imed], "DCUTE" ,1.e-3);    
166     gMC->Gstpar(idtmed[imed], "CUTHAD",1.e-3);    
167     
168     gMC->Gstpar(idtmed[imed], "DRAY",1);    
169     gMC->Gstpar(idtmed[imed], "LOSS",1);    
170
171     imed = kC6F14;  // * Freon Radiator      (>  500 keV delta-electrons)
172     gMC->Gstpar(idtmed[imed], "CUTGAM",1.e-4);
173     gMC->Gstpar(idtmed[imed], "CUTELE",1.e-4);
174     gMC->Gstpar(idtmed[imed], "CUTNEU",1.e-4);
175     gMC->Gstpar(idtmed[imed], "CUTMUO",1.e-4);    
176     gMC->Gstpar(idtmed[imed], "DCUTE" ,5.e-4);    
177     gMC->Gstpar(idtmed[imed], "CUTHAD",5.e-4);    
178     
179     gMC->Gstpar(idtmed[imed], "DRAY",1);    
180     gMC->Gstpar(idtmed[imed], "LOSS",1);    
181     
182     imed = kCH4;  // * Methane Gap         (>  100 keV delta-electrons)
183     gMC->Gstpar(idtmed[imed], "CUTGAM",5.e-5);
184     gMC->Gstpar(idtmed[imed], "CUTELE",5.e-5);
185     gMC->Gstpar(idtmed[imed], "CUTNEU",1.e-4);
186     gMC->Gstpar(idtmed[imed], "CUTMUO",1.e-4);    
187     gMC->Gstpar(idtmed[imed], "DCUTE" ,1.e-4);    
188     gMC->Gstpar(idtmed[imed], "CUTHAD",1.e-4);    
189     
190     gMC->Gstpar(idtmed[imed], "DRAY",1);    
191     gMC->Gstpar(idtmed[imed], "LOSS",1);    
192     
193     imed = kCsI;  // * CSI    (>  50 keV delta-electrons)
194     gMC->Gstpar(idtmed[imed], "CUTGAM",1.e-5);
195     gMC->Gstpar(idtmed[imed], "CUTELE",1.e-5);
196     gMC->Gstpar(idtmed[imed], "CUTNEU",1.e-4);
197     gMC->Gstpar(idtmed[imed], "CUTMUO",1.e-4);    
198     gMC->Gstpar(idtmed[imed], "DCUTE" ,5.e-5);    
199     gMC->Gstpar(idtmed[imed], "CUTHAD",5.e-5);    
200     
201     gMC->Gstpar(idtmed[imed], "DRAY",1);    
202     gMC->Gstpar(idtmed[imed], "LOSS",1);
203     
204     imed = kAl;  // * Alluminium    (>  50 keV delta-electrons)
205     gMC->Gstpar(idtmed[imed], "CUTGAM",1.e-5);
206     gMC->Gstpar(idtmed[imed], "CUTELE",1.e-5);
207     gMC->Gstpar(idtmed[imed], "CUTNEU",1.e-4);
208     gMC->Gstpar(idtmed[imed], "CUTMUO",1.e-4);    
209     gMC->Gstpar(idtmed[imed], "DCUTE" ,5.e-5);    
210     gMC->Gstpar(idtmed[imed], "CUTHAD",5.e-5);    
211     
212     gMC->Gstpar(idtmed[imed], "DRAY",1);    
213     gMC->Gstpar(idtmed[imed], "LOSS",1);    
214     
215     imed = kCu;  // * Copper       (>  50 keV delta-electrons)
216     gMC->Gstpar(idtmed[imed], "CUTGAM",1.e-5);
217     gMC->Gstpar(idtmed[imed], "CUTELE",1.e-5);
218     gMC->Gstpar(idtmed[imed], "CUTNEU",1.e-4);
219     gMC->Gstpar(idtmed[imed], "CUTMUO",1.e-4);    
220     gMC->Gstpar(idtmed[imed], "DCUTE" ,5.e-5);    
221     gMC->Gstpar(idtmed[imed], "CUTHAD",5.e-5);    
222     
223     gMC->Gstpar(idtmed[imed], "DRAY",1);    
224     gMC->Gstpar(idtmed[imed], "LOSS",1);    
225     
226     imed = kW;  // * Tungsten     (>  50 keV delta-electrons)
227     gMC->Gstpar(idtmed[imed], "CUTGAM",1.e-5);
228     gMC->Gstpar(idtmed[imed], "CUTELE",1.e-5);
229     gMC->Gstpar(idtmed[imed], "CUTNEU",1.e-4);
230     gMC->Gstpar(idtmed[imed], "CUTMUO",1.e-4);    
231     gMC->Gstpar(idtmed[imed], "DCUTE" ,5.e-5);    
232     gMC->Gstpar(idtmed[imed], "CUTHAD",5.e-5);    
233     
234     gMC->Gstpar(idtmed[imed], "DRAY",1);    
235     gMC->Gstpar(idtmed[imed], "LOSS",1);    
236     
237 }*/
238 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
239 void AliHMPIDv2::CreateGeometry()
240 {
241 //Creates detailed geometry simulation (currently GEANT volumes tree)         
242   AliDebug(1,"Start main.");
243   if(!gMC->IsRootGeometrySupported()) return;                
244  
245  Double_t cm=1,mm=0.1*cm,um=0.001*mm;//default is cm
246  
247   TGeoMedium *al   =gGeoManager->GetMedium("HMPID_Al");    
248   TGeoMedium *ch4  =gGeoManager->GetMedium("HMPID_CH4");    
249   TGeoMedium *roha =gGeoManager->GetMedium("HMPID_Roha");   
250   TGeoMedium *neoc =gGeoManager->GetMedium("HMPID_Neo");
251   TGeoMedium *c6f14=gGeoManager->GetMedium("HMPID_C6F14");  
252   TGeoMedium *sio2 =gGeoManager->GetMedium("HMPID_SiO2");   
253   TGeoMedium *cu   =gGeoManager->GetMedium("HMPID_Cu");     
254   TGeoMedium *w    =gGeoManager->GetMedium("HMPID_W");      
255   TGeoMedium *csi  =gGeoManager->GetMedium("HMPID_CsI");    
256   TGeoMedium *ar   =gGeoManager->GetMedium("HMPID_Ar");     
257
258   TGeoVolume *hmp=gGeoManager->MakeBox ("Hmp",ch4,1681*mm/2, 1466*mm/2,(2*80*mm+2*60*mm)/2);//2033P1  z from p84 TDR  
259
260   TString title=GetTitle();
261   if(title.Contains("TestBeam")){
262     gGeoManager->GetVolume("ALIC")->AddNode(hmp,0);
263   }else{
264     for(Int_t iCh=AliHMPIDParam::kMinCh;iCh<=AliHMPIDParam::kMaxCh;iCh++){//place 7 chambers
265       TGeoHMatrix *pMatrix=new TGeoHMatrix;
266       IdealPosition(iCh,pMatrix);
267       gGeoManager->GetVolume("ALIC")->AddNode(hmp,iCh,pMatrix);
268     }
269   }
270
271   TGeoRotation *rot=new TGeoRotation("HwireRot"); rot->RotateY(90); //rotate wires around Y to be along X (initially along Z)
272   TGeoVolume *sbo=gGeoManager->MakeBox ("Hsbo",ch4  , 1419*mm/2 , 1378.00*mm/2 ,   50.5*mm/2);//2072P1
273   TGeoVolume *cov=gGeoManager->MakeBox ("Hcov",al   , 1419*mm/2 , 1378.00*mm/2 ,    0.5*mm/2);  
274   TGeoVolume *hon=gGeoManager->MakeBox ("Hhon",roha , 1359*mm/2 , 1318.00*mm/2 ,   49.5*mm/2);  
275   TGeoVolume *rad=gGeoManager->MakeBox ("Hrad",c6f14, 1330*mm/2 ,  413.00*mm/2 ,   24.0*mm/2); //2011P1
276   TGeoVolume *neo=gGeoManager->MakeBox ("Hneo",neoc , 1330*mm/2 ,  413.00*mm/2 ,    4.0*mm/2); 
277   TGeoVolume *win=gGeoManager->MakeBox ("Hwin",sio2 , 1330*mm/2 ,  413.00*mm/2 ,    5.0*mm/2); 
278   TGeoVolume *si1=gGeoManager->MakeBox ("Hsi1",sio2 , 1330*mm/2 ,    5.00*mm/2 ,   15.0*mm/2);    
279   TGeoVolume *si2=gGeoManager->MakeBox ("Hsi2",neoc ,   10*mm/2 ,  403.00*mm/2 ,   15.0*mm/2);    
280   TGeoVolume *spa=gGeoManager->MakeTube("Hspa",sio2 ,    0*mm   ,    5.00*mm   ,   15.0*mm/2);         
281   TGeoVolume *fr4=gGeoManager->MakeBox ("Hfr4",ch4  , 1407*mm/2 , 1366.00*mm/2 ,   15.0*mm/2);//2043P1 
282   TGeoVolume *f4a=gGeoManager->MakeBox ("Hf4a",al   , 1407*mm/2 , 1366.00*mm/2 ,   10.0*mm/2); 
283   TGeoVolume *f4i=gGeoManager->MakeBox ("Hf4i",ch4  , 1323*mm/2 , 1296.00*mm/2 ,   10.0*mm/2); 
284   TGeoVolume *col=gGeoManager->MakeTube("Hcol",cu   ,    0*mm   ,  100.00*um   , 1323.0*mm/2);
285   TGeoVolume *sec=gGeoManager->MakeBox ("Hsec",ch4  ,  648*mm/2 ,  411.00*mm/2 ,   6.2*mm/2);//sec=gap
286  
287   Double_t cellx=8.04*mm,celly=8.4*mm;  Int_t nPadX=80, nPadY=48; 
288   TGeoVolume *gap=gGeoManager->MakeBox ("Hgap",ch4  ,  cellx*nPadX/2 ,  celly*nPadY/2 ,    6.2*mm/2); //x=8.04*80 y=8.4*48 z=pad+pad-ano+marign 2006p1  
289   TGeoVolume *row=        gap->Divide  ("Hrow",2,nPadY,0,0);//along Y->48 rows
290   TGeoVolume *cel=        row->Divide  ("Hcel",1,nPadX,0,0);//along X->80 cells
291   TGeoVolume *cat=gGeoManager->MakeTube("Hcat",cu   ,    0.00*mm   ,   50.00*um   ,    cellx/2); 
292   TGeoVolume *ano=gGeoManager->MakeTube("Hano",w    ,    0.00*mm   ,   20.00*um   ,    cellx/2); 
293   TGeoVolume *pad=gGeoManager->MakeBox ("Hpad",csi  ,    7.54*mm/2 ,    7.90*mm/2 ,    1.7*mm/2); //2006P1 PCB material...     
294   TGeoVolume *fr1=gGeoManager->MakeBox ("Hfr1",al   , 1463*mm/2 , 1422.00*mm/2 ,   58.3*mm/2);//2040P1
295   TGeoVolume *fr1up=gGeoManager->MakeBox ("Hfr1up",ch4,(1426.00-37.00)*mm/2 , (1385.00-37.00)*mm/2 ,    20.0*mm/2);//2040P1
296   TGeoVolume *fr1perUpBig=gGeoManager->MakeBox ("Hfr1perUpBig",ch4,1389*mm/2,35*mm/2,10*mm/2);    
297   TGeoVolume *fr1perUpSma=gGeoManager->MakeBox ("Hfr1perUpSma",ch4,35*mm/2,(1385-37-2*35)*mm/2,10*mm/2);
298         TGeoVolume *fr1perDowBig=gGeoManager->MakeBox ("Hfr1perDowBig",ch4,1389*mm/2,46*mm/2,2.3*mm/2);    
299   TGeoVolume *fr1perDowSma=gGeoManager->MakeBox ("Hfr1perDowSma",ch4,46*mm/2,(1385-37-2*46)*mm/2,2.3*mm/2);
300         
301         TGeoVolume *ppf=gGeoManager->MakeBox ("Hppf",al   ,  648*mm/2 ,  411.00*mm/2 ,   38.3*mm/2);//2001P2
302   TGeoVolume *lar=gGeoManager->MakeBox ("Hlar",ar   ,  181*mm/2 ,   89.25*mm/2 ,   38.3*mm/2);//2001P2
303   TGeoVolume *smo=gGeoManager->MakeBox ("Hsmo",ar   ,  114*mm/2 ,   89.25*mm/2 ,   38.3*mm/2);//2001P2
304                 
305
306                 
307         TGeoVolume *fr3=   gGeoManager->MakeBox("Hfr3",          al,  1463*mm/2,  1422*mm/2,  34*mm/2);//2041P1
308    TGeoVolume *fr3up=    gGeoManager->MakeBox("Hfr3up",     ch4, 1323*mm/2,  1282*mm/2,  20*mm/2);//2041P1
309    TGeoVolume *fr3down=gGeoManager->MakeBox("Hfr3down", ch4, 1437*mm/2,  1370*mm/2,  14*mm/2);//2041P1
310
311
312
313 // ^ Y   z=         z=-12mm      z=98.25mm               ALIC->7xHmp (virtual)-->1xHsbo (virtual) --->2xHcov (real) 2072P1
314 // |  ____________________________________                                    |                   |-->1xHhon (real) 2072P1
315 // | |   ______     ____          ______  |                                   |
316 //   |  |      |   |    |   *    |      | |                                   |->3xHrad (virtual) --->1xHneo (real) 2011P1
317 //   |  |50.5mm|   |24mm|   *    |45.5mm| |                                   |                   |-->1xHwin (real) 2011P1
318 //   |  |      |   |    |   *    |      | |                                   |                   |-->2xHsi1 (real) 2011P1
319 //   |  |      |   |____|   *    |______| |                                   |                   |-->2xHsi2 (real) 2011P1
320 //   |  |      |    ____    *     ______  |                                   |                   |->30xHspa (real) 2011P1
321 //   |  |      |   |    |   *    |      | |                                   |
322 //   |  |      |   |    |   *    |      | |                                   |->1xHfr4 (vitual) --->1xHf4a (real)---->1xHf4i(virtual) 2043P1 
323 //   |  |  sb  |   | rad|   *    |      | |                                   |                  |-->322xHcol (real) 2043P1
324 //   |  |      |   |____|   *    |______| |                                   |
325 //   |  |      |    ____    *     ______  |                                   |->1xHfr1 (real) --> 6xHppf(real) ---->8xHlar (virtual) 2001P1
326 //   |  |      |   |    |   *    |      | |                                   |                                     |--->8xHsmo (virtual) 2001P1     
327 //   |  |      |   |    |   *    |      | |                                   |               
328 //   |  |      |   |    |   *    |      | |                                   |-> 6xHgap (virtual) --->48xHrow (virtual) -->80xHcel (virtual) -->4xHcat (real) from p84 TDR 
329 //   |  |______|   |____|   *    |______| |                                                                                                  |-->2xHano (real) from p84 TDR                                  
330 //   |____________________________________|                                                                                                  |-->1xHpad (real) from p84 TDR 
331 //                                                       --->Z 
332   hmp->AddNode(sbo ,1,new TGeoTranslation(   0*mm,   0*mm, -73.75*mm));                     //p.84 TDR
333      sbo->AddNode(hon ,1,new TGeoTranslation(  0*mm,0*mm,      0*mm)); //2072P1
334      sbo->AddNode(cov ,1,new TGeoTranslation(  0*mm,0*mm,    +25*mm)); 
335      sbo->AddNode(cov ,2,new TGeoTranslation(  0*mm,0*mm,    -25*mm)); 
336   hmp->AddNode(rad,2,new TGeoTranslation(   0*mm,+434*mm, -12.00*mm)); 
337   hmp->AddNode(rad,1,new TGeoTranslation(   0*mm,   0*mm, -12.00*mm)); 
338   hmp->AddNode(rad,0,new TGeoTranslation(   0*mm,-434*mm, -12.00*mm)); 
339     rad->AddNode(neo,1,new TGeoTranslation(   0*mm,   0*mm, -10.0*mm));
340     rad->AddNode(win,1,new TGeoTranslation(   0*mm,   0*mm,   9.5*mm));
341     rad->AddNode(si1,1,new TGeoTranslation(   0*mm,-204*mm,  -0.5*mm)); rad->AddNode(si1,2,new TGeoTranslation(   0*mm,+204*mm,  -0.5*mm));
342     rad->AddNode(si2,1,new TGeoTranslation(-660*mm,   0*mm,  -0.5*mm)); rad->AddNode(si2,2,new TGeoTranslation(+660*mm,   0*mm,  -0.5*mm));
343     for(Int_t i=0;i<3;i++) for(Int_t j=0;j<10;j++) rad->AddNode(spa,10*i+j,new TGeoTranslation(-1330*mm/2+116*mm+j*122*mm,(i-1)*105*mm,-0.5*mm));
344   hmp->AddNode(fr4,1,new TGeoTranslation(   0*mm,   0*mm,   9.00*mm));                     //p.84 TDR
345   for(int i=1;i<=322;i++)  fr4->AddNode(col,i,new TGeoCombiTrans( 0*mm, -1296/2*mm+i*4*mm,-5*mm,rot)); //F4 2043P1
346                            fr4->AddNode(f4a,1,new TGeoTranslation(   0*mm,0*mm, 2.5*mm));    
347                                         f4a->AddNode(f4i,1,new TGeoTranslation(   0*mm,0*mm,   0*mm));
348   hmp->AddNode(sec,4,new TGeoTranslation(-335*mm,+433*mm,  78.6*mm)); hmp->AddNode(sec,5,new TGeoTranslation(+335*mm,+433*mm,  78.6*mm));
349   hmp->AddNode(sec,2,new TGeoTranslation(-335*mm,   0*mm,  78.6*mm)); hmp->AddNode(sec,3,new TGeoTranslation(+335*mm,   0*mm,  78.6*mm));
350   hmp->AddNode(sec,0,new TGeoTranslation(-335*mm,-433*mm,  78.6*mm)); hmp->AddNode(sec,1,new TGeoTranslation(+335*mm,-433*mm,  78.6*mm));
351     sec->AddNode(gap,1,new TGeoTranslation(0,0,0.*mm));
352       cel->AddNode(cat,1,new TGeoCombiTrans (0,  3.15*mm , -2.70*mm , rot)); //4 cathode wires
353       cel->AddNode(ano,1,new TGeoCombiTrans (0,  2.00*mm , -0.29*mm , rot)); //2 anod wires
354       cel->AddNode(cat,2,new TGeoCombiTrans (0,  1.05*mm , -2.70*mm , rot)); 
355       cel->AddNode(cat,3,new TGeoCombiTrans (0, -1.05*mm , -2.70*mm , rot)); 
356       cel->AddNode(ano,2,new TGeoCombiTrans (0, -2.00*mm , -0.29*mm , rot)); 
357       cel->AddNode(cat,4,new TGeoCombiTrans (0, -3.15*mm , -2.70*mm , rot));   
358       cel->AddNode(pad,1,new TGeoTranslation(0,  0.00*mm ,  2.25*mm));       //1 pad  
359             
360   hmp->AddNode(fr1,1,new TGeoTranslation(0.,0.,(80.+1.7)*mm+58.3*mm/2.));
361                 fr1->AddNode(fr1up,1,new TGeoTranslation(0.,0.,(58.3*mm-20.00*mm)/2.));
362                 
363                 fr1->AddNode(fr1perUpBig,0,new TGeoTranslation(0.,(1385-37-35)*mm/2.,(58.3*mm-20.00*2*mm-10.0*mm)/2.));
364                 fr1->AddNode(fr1perUpSma,0,new TGeoTranslation((1426-37-35)*mm/2.,0.,(58.3*mm-20.00*2*mm-10.0*mm)/2.));
365                 fr1->AddNode(fr1perUpBig,1,new TGeoTranslation(0.,-(1385-37-35)*mm/2.,(58.3*mm-20.00*2*mm-10.0*mm)/2.));
366                 fr1->AddNode(fr1perUpSma,1,new TGeoTranslation(-(1426-37-35)*mm/2.,0.,(58.3*mm-20.00*2*mm-10.0*mm)/2.));
367                 
368           fr1->AddNode(fr1perDowBig,0,new TGeoTranslation(0.,(1385-37-46)*mm/2.,(-58.3*mm+2.3*mm)/2.));
369                 fr1->AddNode(fr1perDowSma,0,new TGeoTranslation((1426-37-46)*mm/2.,0.,(-58.3*mm+2.3*mm)/2.));
370           fr1->AddNode(fr1perDowBig,1,new TGeoTranslation(0.,-(1385-37-46)*mm/2.,(-58.3*mm+2.3*mm)/2.));
371                 fr1->AddNode(fr1perDowSma,1,new TGeoTranslation(-(1426-37-46)*mm/2.,0.,(-58.3*mm+2.3*mm)/2.));
372                 
373                         
374           fr1->AddNode(ppf,4,new TGeoTranslation(-335*mm,433*mm,(-58.3+38.3)*mm/2.));  fr1->AddNode(ppf,5,new TGeoTranslation(335*mm,433*mm,(-58.3+38.3)*mm/2.));       
375           fr1->AddNode(ppf,2,new TGeoTranslation(-335*mm,0.,(-58.3+38.3)*mm/2.));      fr1->AddNode(ppf,3,new TGeoTranslation(335*mm,0.,(-58.3+38.3)*mm/2.));
376           fr1->AddNode(ppf,0,new TGeoTranslation(-335*mm,-433*mm,(-58.3+38.3)*mm/2.)); fr1->AddNode(ppf,1,new TGeoTranslation(335*mm,-433*mm,(-58.3+38.3)*mm/2.));
377                 
378                 
379                 
380                 
381                 
382                 
383 // ^ Y  single cell                                                5.5mm CH4 = 1*mm CsI + 4.45*mm CsI x cath +0.05*mm safety margin         
384 // |      ______________________________           
385 // |     |                              |          ^                            ||     
386 //       |                              | 1.05mm                                ||     
387 // 2.2*mm| xxxxxxxxxxxxxxxxxxxxxxxxxxxx |--              50um  x                || cat shift  x=0mm , y= 3.15mm , z=-2.70mm       
388 //       |                              |                                       ||     
389 //       |                              |                                       ||     
390 // __    |  ..........................  | 2.1mm                    20un .       ||  ano shift x=0mm , y= 2.00mm , z=-0.29mm   
391 //       |                              |                                       ||     
392 //       |                              |                                       ||     
393 //       | xxxxxxxxxxxxxxxxxxxxxxxxxxxx |--                    x                ||  cat shift x=0mm , y= 1.05mm , z=-2.70mm   
394 //       |                              |                                       ||     
395 //       |                              |         8.4mm                         ||   
396 // 4*mm  |                              | 2.1mm                                 ||  pad shift x=0mm , y= 0.00mm , z=2.25*mm   
397 //       |                              |                                       ||  
398 //       |                              |                                       ||  
399 //       | xxxxxxxxxxxxxxxxxxxxxxxxxxxx |--                    x                ||  cat shift x=0mm , y=-1.05mm , z=-2.70mm   
400 //       |                              |                                       ||  
401 //       |                              |                                       ||    
402 // __    |  ..........................  | 2.1mm                         . 2.04mm||  ano shift x=0mm , y=-2.00mm , z=-0.29mm   
403 //       |                              |                                       ||  
404 //       |                              |                                       ||  
405 //       | xxxxxxxxxxxxxxxxxxxxxxxxxxxx |--                    x    4.45mm      ||  cat shift x=0mm , y=-3.15mm , z=-2.70mm   
406 // 2.2*mm|                              |                                       ||  
407 //       |                              | 1.05mm                                ||         
408 //       |______________________________|          v                            ||    
409 //       <             8 mm             >                          
410 //                                   ----->X                                 ----->Z
411   ppf->AddNode(lar,0,new TGeoTranslation(-224.5*mm,-151.875*mm,  0.*mm));
412   ppf->AddNode(lar,1,new TGeoTranslation(-224.5*mm,- 50.625*mm,  0.*mm));
413   ppf->AddNode(lar,2,new TGeoTranslation(-224.5*mm,+ 50.625*mm,  0.*mm));
414   ppf->AddNode(lar,3,new TGeoTranslation(-224.5*mm,+151.875*mm,  0.*mm));
415   ppf->AddNode(lar,4,new TGeoTranslation(+224.5*mm,-151.875*mm,  0.*mm));
416   ppf->AddNode(lar,5,new TGeoTranslation(+224.5*mm,- 50.625*mm,  0.*mm));
417   ppf->AddNode(lar,6,new TGeoTranslation(+224.5*mm,+ 50.625*mm,  0.*mm));
418   ppf->AddNode(lar,7,new TGeoTranslation(+224.5*mm,+151.875*mm,  0.*mm));
419   ppf->AddNode(smo,0,new TGeoTranslation(- 65.0*mm,-151.875*mm,  0.*mm));
420   ppf->AddNode(smo,1,new TGeoTranslation(- 65.0*mm,- 50.625*mm,  0.*mm));
421   ppf->AddNode(smo,2,new TGeoTranslation(- 65.0*mm,+ 50.625*mm,  0.*mm));
422   ppf->AddNode(smo,3,new TGeoTranslation(- 65.0*mm,+151.875*mm,  0.*mm));
423   ppf->AddNode(smo,4,new TGeoTranslation(+ 65.0*mm,-151.875*mm,  0.*mm));
424   ppf->AddNode(smo,5,new TGeoTranslation(+ 65.0*mm,- 50.625*mm,  0.*mm));
425   ppf->AddNode(smo,6,new TGeoTranslation(+ 65.0*mm,+ 50.625*mm,  0.*mm));
426   ppf->AddNode(smo,7,new TGeoTranslation(+ 65.0*mm,+151.875*mm,  0.*mm)); 
427
428 hmp->AddNode(fr3,1,new TGeoTranslation(0.,0.,(80.-29.)*mm-34.*mm/2));
429          fr3->AddNode( fr3up,1,    new TGeoTranslation(0.,  0.,  7*mm));
430          fr3->AddNode(fr3down,1,new TGeoTranslation(0.,  0., -10*mm));  
431
432   AliDebug(1,"Stop v2. HMPID option");  
433 }//CreateGeometry()
434 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
435 void AliHMPIDv2::Init()
436 {
437 // This method defines ID for sensitive volumes, i.e. such geometry volumes for which there are if(gMC->CurrentVolID()==XXX) 
438 // statements in StepManager()
439 // Arguments: none
440 //   Returns: none      
441   AliDebug(1,"Start v2 HMPID.");    
442   fIdPad     = gMC->VolId("Hpad");
443   fIdCell    = gMC->VolId("Hcel");
444   AliDebug(1,"Stop v2 HMPID.");    
445 }
446 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
447 void AliHMPIDv2::DefineOpticalProperties()
448 {
449 // Optical properties definition.
450   const Int_t kNbins=30;       //number of photon energy points
451   Float_t emin=5.5,emax=8.5;         //Photon energy range,[eV]
452   Float_t aEckov [kNbins]; 
453   Double_t dEckov [kNbins]; 
454   Float_t aAbsRad[kNbins], aAbsWin[kNbins], aAbsGap[kNbins], aAbsMet[kNbins];
455   Float_t aIdxRad[kNbins], aIdxWin[kNbins], aIdxGap[kNbins], aIdxMet[kNbins], aIdxPc[kNbins]; 
456   Float_t                                                    aQeAll [kNbins], aQePc [kNbins];
457   Double_t dReflMet[kNbins], dQePc[kNbins];
458
459   TF2 *pRaIF=new TF2("HidxRad","sqrt(1+0.554*(1239.84/x)^2/((1239.84/x)^2-5769)-0.0005*(y-20))"                                       ,emin,emax,0,50); //DiMauro mail temp 0-50 degrees C
460   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
461   TF1 *pGaIF=new TF1("HidxGap","1+0.12489e-6/(2.62e-4 - x*x/1239.84/1239.84)"                                                         ,emin,emax);      //?????? from where  
462
463   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 
464   pRaAF->SetParameters(3.20491e16,-0.00917890,0.742402,3035.37,4.81171,0.626309);
465   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 
466   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  
467   
468   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  
469                    
470   TString title=GetTitle();
471   Bool_t isFlatIdx=title.Contains("FlatIdx"); 
472   
473   for(Int_t i=0;i<kNbins;i++){
474     Float_t eV=emin+0.1*i;  //Ckov energy in eV
475     aEckov [i] =1e-9*eV;    //Ckov energy in GeV
476     dEckov [i] = aEckov[i];
477     aAbsRad[i]=pRaAF->Eval(eV); (isFlatIdx)? aIdxRad[i]=1.292: aIdxRad[i]=pRaIF->Eval(eV,20);     
478     aAbsWin[i]=pWiAF->Eval(eV);              aIdxWin[i]=pWiIF->Eval(eV);
479     aAbsGap[i]=pGaAF->Eval(eV);              aIdxGap[i]=pGaIF->Eval(eV);   
480     aQeAll[i] =1;                     //QE for all other materials except for PC must be 1.  
481     aAbsMet[i] =0.0001;                aIdxMet[i]=0;                                             //metal ref idx must be 0 in order to reflect photon
482                                        aIdxPc [i]=1;           aQePc [i]=pQeF->Eval(eV);         //PC ref idx must be 1 in order to apply photon to QE conversion 
483     dQePc [i]=pQeF->Eval(eV);
484     dReflMet[i] = 0.;     // no reflection on the surface of the pc (?)                                       
485   }
486   gMC->SetCerenkov((*fIdtmed)[kC6F14]    , kNbins, aEckov, aAbsRad  , aQeAll , aIdxRad );    
487   gMC->SetCerenkov((*fIdtmed)[kSiO2]     , kNbins, aEckov, aAbsWin  , aQeAll , aIdxWin );    
488   gMC->SetCerenkov((*fIdtmed)[kCH4]      , kNbins, aEckov, aAbsGap  , aQeAll , aIdxGap );    
489   gMC->SetCerenkov((*fIdtmed)[kCu]       , kNbins, aEckov, aAbsMet  , aQeAll , aIdxMet );    
490   gMC->SetCerenkov((*fIdtmed)[kW]        , kNbins, aEckov, aAbsMet  , aQeAll , aIdxMet ); //n=0 means reflect photons       
491   gMC->SetCerenkov((*fIdtmed)[kCsI]      , kNbins, aEckov, aAbsMet  , aQePc  , aIdxPc  ); //n=1 means convert photons    
492   gMC->SetCerenkov((*fIdtmed)[kAl]       , kNbins, aEckov, aAbsMet  , aQeAll , aIdxMet );    
493
494   // Define a skin surface for the photocatode to enable 'detection' in G4
495   gMC->DefineOpSurface("surfPc", kGlisur /*kUnified*/,kDielectric_metal,kPolished, 0.);
496   gMC->SetMaterialProperty("surfPc", "EFFICIENCY", kNbins, dEckov, dQePc);
497   gMC->SetMaterialProperty("surfPc", "REFLECTIVITY", kNbins, dEckov, dReflMet);
498   gMC->SetSkinSurface("skinPc", "Rpc", "surfPc");
499
500   delete pRaAF;delete pWiAF;delete pGaAF; delete pRaIF; delete pWiIF; delete pGaIF; delete pQeF;
501 }
502 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
503 Bool_t AliHMPIDv2::IsLostByFresnel()
504 {
505 // Calculate probability for the photon to be lost by Fresnel reflection.
506   TLorentzVector p4;
507   Double_t mom[3],localMom[3];
508   gMC->TrackMomentum(p4);   mom[0]=p4(1);   mom[1]=p4(2);   mom[2]=p4(3);
509   localMom[0]=0; localMom[1]=0; localMom[2]=0;
510   gMC->Gmtod(mom,localMom,2);
511   Double_t localTc    = localMom[0]*localMom[0]+localMom[2]*localMom[2];
512   Double_t localTheta = TMath::ATan2(TMath::Sqrt(localTc),localMom[1]);
513   Double_t cotheta = TMath::Abs(TMath::Cos(localTheta));
514   if(gMC->GetRandom()->Rndm() < Fresnel(p4.E()*1e9,cotheta,1)){
515     AliDebug(1,"Photon lost");
516     return kTRUE;
517   }else
518     return kFALSE;
519 }//IsLostByFresnel()
520 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
521 void AliHMPIDv2::GenFee(Float_t qtot)
522 {
523 // Generate FeedBack photons for the current particle. To be invoked from StepManager().
524 // eloss=0 means photon so only pulse height distribution is to be analysed.
525   TLorentzVector x4;
526   gMC->TrackPosition(x4); 
527   Int_t iNphotons=gMC->GetRandom()->Poisson(0.02*qtot);  //# of feedback photons is proportional to the charge of hit
528   AliDebug(1,Form("N photons=%i",iNphotons));
529   Int_t j;
530   Float_t cthf, phif, enfp = 0, sthf, e1[3], e2[3], e3[3], vmod, uswop,dir[3], phi,pol[3], mom[4];
531 //Generate photons
532   for(Int_t i=0;i<iNphotons;i++){//feedbacks loop
533     Double_t ranf[2];
534     gMC->GetRandom()->RndmArray(2,ranf);    //Sample direction
535     cthf=ranf[0]*2-1.0;
536     if(cthf<0) continue;
537     sthf = TMath::Sqrt((1. - cthf) * (1. + cthf));
538     phif = ranf[1] * 2 * TMath::Pi();
539     
540     if(Double_t randomNumber=gMC->GetRandom()->Rndm()<=0.57)
541       enfp = 7.5e-9;
542     else if(randomNumber<=0.7)
543       enfp = 6.4e-9;
544     else
545       enfp = 7.9e-9;
546     
547
548     dir[0] = sthf * TMath::Sin(phif);    dir[1] = cthf;    dir[2] = sthf * TMath::Cos(phif);
549     gMC->Gdtom(dir, mom, 2);
550     mom[0]*=enfp;    mom[1]*=enfp;    mom[2]*=enfp;
551     mom[3] = TMath::Sqrt(mom[0]*mom[0]+mom[1]*mom[1]+mom[2]*mom[2]);
552     
553     // Polarisation
554     e1[0]=      0;    e1[1]=-dir[2];    e1[2]= dir[1];
555     e2[0]=-dir[1];    e2[1]= dir[0];    e2[2]=      0;
556     e3[0]= dir[1];    e3[1]=      0;    e3[2]=-dir[0];
557     
558     vmod=0;
559     for(j=0;j<3;j++) vmod+=e1[j]*e1[j];
560     if (!vmod) for(j=0;j<3;j++) {
561       uswop=e1[j];
562       e1[j]=e3[j];
563       e3[j]=uswop;
564     }
565     vmod=0;
566     for(j=0;j<3;j++) vmod+=e2[j]*e2[j];
567     if (!vmod) for(j=0;j<3;j++) {
568       uswop=e2[j];
569       e2[j]=e3[j];
570       e3[j]=uswop;
571     }
572     
573     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;    
574     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;
575     
576     phi = gMC->GetRandom()->Rndm()* 2 * TMath::Pi();
577     for(j=0;j<3;j++) pol[j]=e1[j]*TMath::Sin(phi)+e2[j]*TMath::Cos(phi);
578     gMC->Gdtom(pol, pol, 2);
579     Int_t outputNtracksStored;    
580     gAlice->GetMCApp()->PushTrack(1,                             //transport
581                      gAlice->GetMCApp()->GetCurrentTrackNumber(),//parent track 
582                      50000051,                                   //PID
583                      mom[0],mom[1],mom[2],mom[3],                //track momentum  
584                      x4.X(),x4.Y(),x4.Z(),x4.T(),                //track origin 
585                      pol[0],pol[1],pol[2],                       //polarization
586                      kPFeedBackPhoton,                           //process ID   
587                      outputNtracksStored,                        //on return how many new photons stored on stack
588                      1.0);                                       //weight
589   }//feedbacks loop
590   AliDebug(1,"Stop.");
591 }//GenerateFeedbacks()
592 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
593 void AliHMPIDv2::Hits2SDigits()
594 {
595 // Interface method ivoked from AliSimulation to create a list of sdigits corresponding to list of hits. Every hit generates one or more sdigits.
596 // Arguments: none
597 //   Returns: none   
598   AliDebug(1,"Start.");
599   for(Int_t iEvt=0;iEvt < GetLoader()->GetRunLoader()->GetNumberOfEvents();iEvt++){                //events loop
600     GetLoader()->GetRunLoader()->GetEvent(iEvt);                          //get next event
601   
602     if(!GetLoader()->TreeH()) {GetLoader()->LoadHits();                    }
603     if(!GetLoader()->TreeS()) {GetLoader()->MakeTree("S"); MakeBranch("S");}//to
604           
605     for(Int_t iEnt=0;iEnt<GetLoader()->TreeH()->GetEntries();iEnt++){//prims loop
606       GetLoader()->TreeH()->GetEntry(iEnt);
607       Hit2Sdi(Hits(),SdiLst());
608     }//prims loop
609     GetLoader()->TreeS()->Fill();
610     GetLoader()->WriteSDigits("OVERWRITE");
611     SdiReset();
612   }//events loop  
613   GetLoader()->UnloadHits();
614   GetLoader()->UnloadSDigits();  
615   AliDebug(1,"Stop.");
616 }//Hits2SDigits()
617 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
618 void AliHMPIDv2::Hit2Sdi(TClonesArray *pHitLst,TClonesArray *pSdiLst)
619 {
620 // Converts list of hits to list of sdigits. 
621 // Arguments: pHitLst  - list of hits provided not empty
622 //            pSDigLst - list of sdigits where to store the results
623 //   Returns: none         
624   for(Int_t iHit=0;iHit<pHitLst->GetEntries();iHit++){         //hits loop
625     AliHMPIDHit *pHit=(AliHMPIDHit*)pHitLst->At(iHit);         //get pointer to current hit   
626     pHit->Hit2Sdi(pSdiLst);                                    //convert this hit to list of sdigits     
627   }//hits loop loop
628 }//Hits2Sdi()
629 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
630 void AliHMPIDv2::Digits2Raw()
631 {
632 // Interface method invoked by AliSimulation to create raw data streams from digits. Events loop is done in AliSimulation
633 // Arguments: none
634 //   Returns: none    
635   AliDebug(1,"Start.");
636   GetLoader()->LoadDigits();
637   TTree * treeD = GetLoader()->TreeD();
638   if(!treeD) {
639     AliError("No digits tree!");
640     return;
641   }
642   treeD->GetEntry(0);
643   
644   
645   AliHMPIDRawStream *pRS=0x0;
646   pRS->WriteRaw(DigLst());
647    
648   GetLoader()->UnloadDigits();
649   AliDebug(1,"Stop.");      
650 }//Digits2Raw()
651 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
652 Float_t AliHMPIDv2::Fresnel(Float_t ene,Float_t pdoti, Bool_t pola)
653 {
654 // Correction for Fresnel   ???????????
655 // Arguments:   ene - photon energy [GeV],
656 //              PDOTI=COS(INC.ANG.), PDOTR=COS(POL.PLANE ROT.ANG.)
657 //   Returns:  
658     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,
659                       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,
660                       7.8,7.9,8.0,8.1,8.2,8.3,8.4,8.5};
661     Float_t csin[36] = {2.14,2.21,2.33,2.48,2.76,2.97,2.99,2.59,2.81,3.05,
662                         2.86,2.53,2.55,2.66,2.79,2.96,3.18,3.05,2.84,2.81,2.38,2.11,
663                         2.01,2.13,2.39,2.73,3.08,3.15,2.95,2.73,2.56,2.41,2.12,1.95,
664                         1.72,1.53};
665     Float_t csik[36] = {0.,0.,0.,0.,0.,0.196,0.408,0.208,0.118,0.49,0.784,0.543,
666                         0.424,0.404,0.371,0.514,0.922,1.102,1.139,1.376,1.461,1.253,0.878,
667                         0.69,0.612,0.649,0.824,1.347,1.571,1.678,1.763,1.857,1.824,1.824,
668                         1.714,1.498};
669     Float_t xe=ene;
670     Int_t  j=Int_t(xe*10)-49;
671     Float_t cn=csin[j]+((csin[j+1]-csin[j])/0.1)*(xe-en[j]);
672     Float_t ck=csik[j]+((csik[j+1]-csik[j])/0.1)*(xe-en[j]);
673
674     //FORMULAE FROM HANDBOOK OF OPTICS, 33.23 OR
675     //W.R. HUNTER, J.O.S.A. 54 (1964),15 , J.O.S.A. 55(1965),1197
676
677     Float_t sinin=TMath::Sqrt((1.-pdoti)*(1.+pdoti));
678     Float_t tanin=sinin/pdoti;
679
680     Float_t c1=cn*cn-ck*ck-sinin*sinin;
681     Float_t c2=4*cn*cn*ck*ck;
682     Float_t aO=TMath::Sqrt(0.5*(TMath::Sqrt(c1*c1+c2)+c1));
683     Float_t b2=0.5*(TMath::Sqrt(c1*c1+c2)-c1);
684     
685     Float_t rs=((aO-pdoti)*(aO-pdoti)+b2)/((aO+pdoti)*(aO+pdoti)+b2);
686     Float_t rp=rs*((aO-sinin*tanin)*(aO-sinin*tanin)+b2)/((aO+sinin*tanin)*(aO+sinin*tanin)+b2);
687     
688
689     //CORRECTION FACTOR FOR SURFACE ROUGHNESS
690     //B.J. STAGG  APPLIED OPTICS, 30(1991),4113
691
692     Float_t sigraf=18.;
693     Float_t lamb=1240/ene;
694     Float_t fresn;
695  
696     Float_t  rO=TMath::Exp(-(4*TMath::Pi()*pdoti*sigraf/lamb)*(4*TMath::Pi()*pdoti*sigraf/lamb));
697
698     if(pola)
699     {
700         Float_t pdotr=0.8;                                 //DEGREE OF POLARIZATION : 1->P , -1->S
701         fresn=0.5*(rp*(1+pdotr)+rs*(1-pdotr));
702     }
703     else
704         fresn=0.5*(rp+rs);
705       
706     fresn = fresn*rO;
707     return fresn;
708 }//Fresnel()
709 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
710 void AliHMPIDv2::Print(Option_t *option)const
711 {
712 // Debug printout
713   TObject::Print(option);
714 }//void AliHMPID::Print(Option_t *option)const
715 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
716 Bool_t AliHMPIDv2::Raw2SDigits(AliRawReader *pRR)
717 {
718 // Interface methode ivoked from AliSimulation to create a list of sdigits from raw digits. Events loop is done in AliSimulation
719 // Arguments: pRR- raw reader 
720 //   Returns: kTRUE on success (currently ignored in AliSimulation::ConvertRaw2SDigits())      
721   //AliHMPIDDigit sdi; //tmp sdigit, raw digit will be converted to it
722   
723   if(!GetLoader()->TreeS()) {MakeTree("S");  MakeBranch("S");}
724     
725   TClonesArray *pSdiLst=SdiLst(); Int_t iSdiCnt=0; //tmp list of sdigits for all chambers
726   AliHMPIDRawStream stream(pRR);
727   while(stream.Next())
728   {
729     for(Int_t iPad=0;iPad<stream.GetNPads();iPad++) {
730       AliHMPIDDigit sdi(stream.GetPadArray()[iPad],stream.GetChargeArray()[iPad]);
731       new((*pSdiLst)[iSdiCnt++]) AliHMPIDDigit(sdi); //add this digit to the tmp list
732     }
733   }
734   
735   GetLoader()->TreeS()->Fill(); GetLoader()->WriteSDigits("OVERWRITE");//write out sdigits
736   SdiReset();
737   return kTRUE;
738 }//Raw2SDigits
739 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
740 void AliHMPIDv2::StepCount()
741 {
742 // Count number of ckovs created  
743 }
744 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
745 void AliHMPIDv2::StepHistory()
746 {
747 // This methode is invoked from StepManager() in order to print out 
748   static Int_t iStepN;
749   const char *sParticle;
750   switch(gMC->TrackPid()){
751     case kProton:      sParticle="PROTON"    ;break;
752     case kNeutron:     sParticle="neutron"   ;break;
753     case kGamma:       sParticle="gamma"     ;break;
754     case 50000050:     sParticle="CKOV"      ;break;
755     case kPi0:         sParticle="Pi0"       ;break;  
756     case kPiPlus:      sParticle="Pi+"       ;break;  
757     case kPiMinus:     sParticle="Pi-"       ;break;  
758     case kElectron:    sParticle="electron"  ;break;  
759     default:           sParticle="not known" ;break;
760   }
761
762   TString flag="fanny combination";
763   if(gMC->IsTrackAlive()) {
764     if(gMC->IsTrackEntering())      flag="enters to";
765     else if(gMC->IsTrackExiting())  flag="exits from";
766     else if(gMC->IsTrackInside())   flag="inside";
767   } else {
768     if(gMC->IsTrackStop())          flag="stopped in";
769   }
770   
771   Int_t vid=0,copy=0;
772   TString path=gMC->CurrentVolName(); path.Prepend("-");path.Prepend(gMC->CurrentVolOffName(1));//current volume and his mother are always there
773   vid=gMC->CurrentVolOffID(2,copy);  if(vid) {path.Prepend("-");path.Prepend(gMC->VolName(vid));}
774   vid=gMC->CurrentVolOffID(3,copy);  if(vid) {path.Prepend("-");path.Prepend(gMC->VolName(vid));}
775  
776   
777   Printf("Step %i: %s (%i) %s %s m=%.6f GeV q=%.1f dEdX=%.4f Etot=%.4f",iStepN,sParticle,gMC->TrackPid(),flag.Data(),path.Data(),gMC->TrackMass(),gMC->TrackCharge(),gMC->Edep()*1e9,gMC->Etot());
778   
779   Double_t gMcTrackPos[3]; gMC->TrackPosition(gMcTrackPos[0],gMcTrackPos[1],gMcTrackPos[2]);
780   Double_t  gMcTrackPosLoc[3]; gMC->Gmtod(gMcTrackPos,gMcTrackPosLoc,1);
781   Printf("gMC Track Position (MARS) x: %5.3lf, y: %5.3lf, z: %5.3lf (r: %5.3lf) ---> (LOC) x: %5.3f, y: %5.3f, z: %5.3f",gMcTrackPos[0],gMcTrackPos[1],gMcTrackPos[2],TMath::Sqrt(gMcTrackPos[0]*gMcTrackPos[0]+gMcTrackPos[1]*gMcTrackPos[1]+gMcTrackPos[2]*gMcTrackPos[2]),gMcTrackPosLoc[0],gMcTrackPosLoc[1],gMcTrackPosLoc[2]);
782   
783
784   
785   Printf("Step %i: tid=%i flags alive=%i disap=%i enter=%i exit=%i inside=%i out=%i stop=%i new=%i",
786                             iStepN, gAlice->GetMCApp()->GetCurrentTrackNumber(),
787                             gMC->IsTrackAlive(), gMC->IsTrackDisappeared(),gMC->IsTrackEntering(), gMC->IsTrackExiting(),
788                             gMC->IsTrackInside(),gMC->IsTrackOut(),        gMC->IsTrackStop(),     gMC->IsNewTrack());
789   
790   Float_t a,z,den,rad,abs; a=z=den=rad=abs=-1;
791   Int_t mid=gMC->CurrentMaterial(a,z,den,rad,abs);
792   Printf("Step %i: mid=%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);
793   
794   TArrayI proc;  gMC->StepProcesses(proc); 
795   Printf("Processes in this step:");
796   for ( int i = 0 ; i < proc.GetSize(); i++)
797   {
798     Printf("%s",TMCProcessName[proc.At(i)]);
799   }
800   Printf("End process list");
801   
802   iStepN++;
803 }//StepHistory()
804 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
805 void AliHMPIDv2::StepManager()
806 {
807 // Full Step Manager.
808 // Arguments: none
809 //   Returns: none           
810 //  StepHistory(); return; //uncomment to print tracks history
811  //  StepCount(); return;     //uncomment to count photons
812   
813   Int_t   copy; //volume copy aka node
814   
815 //Treat photons    
816   if((gMC->TrackPid()==50000050||gMC->TrackPid()==50000051)&&gMC->CurrentVolID(copy)==fIdPad){   //photon (Ckov or feedback) hit PC (fIdPad)
817     if(gMC->Edep()>0){                                                                           //photon survided QE test i.e. produces electron
818       if(IsLostByFresnel()){ gMC->StopTrack(); return;}                                          //photon lost due to fersnel reflection on PC       
819                        gMC->CurrentVolOffID(5,copy);                                             //current chamber since geomtry tree is Hmp-Hsec-Hgap-Hrow-Hcel-Hpad
820       Int_t   tid=     gMC->GetStack()->GetCurrentTrackNumber();                                 //take TID
821       Int_t   pid=     gMC->TrackPid();                                                          //take PID
822       Float_t etot=    gMC->Etot();                                                              //total hpoton energy, [GeV] 
823       Double_t x[3];   gMC->TrackPosition(x[0],x[1],x[2]);                                       //take MARS position at entrance to PC
824       Float_t hitTime= (Float_t)gMC->TrackTime();                                                         //hit formation time 
825       Float_t xl,yl;   AliHMPIDParam::Instance()->Mars2Lors(copy,x,xl,yl);                       //take LORS position
826       new((*fHits)[fNhits++])AliHMPIDHit(copy,etot,pid,tid,xl,yl,hitTime,x);                             //HIT for photon, position at P, etot will be set to Q
827       if(fDoFeed) GenFee(etot);                                                                  //generate feedback photons etot is modified in hit ctor to Q of hit
828     }//photon hit PC and DE >0 
829   }//photon hit PC
830   
831 //Treat charged particles  
832   static Float_t eloss;                                                                           //need to store mip parameters between different steps    
833   static Double_t in[3];                                                                          
834   if(gMC->IsTrackEntering() && gMC->TrackCharge() && gMC->CurrentVolID(copy)==fIdPad)             //Trackref stored when entering in the pad volume
835     AddTrackReference(gMC->GetStack()->GetCurrentTrackNumber(), AliTrackReference::kHMPID);       //for acceptance calculations
836   if(gMC->TrackCharge() && gMC->CurrentVolID(copy)==fIdCell){                                     //charged particle in amplification gap (fIdCell)
837     if(gMC->IsTrackEntering()||gMC->IsNewTrack()) {                                               //entering or newly created
838       eloss=0;                                                                                    //reset Eloss collector                         
839       gMC->TrackPosition(in[0],in[1],in[2]);                                                      //take position at the entrance
840     }else if(gMC->IsTrackExiting()||gMC->IsTrackStop()||gMC->IsTrackDisappeared()){               //exiting or disappeared
841       eloss              +=gMC->Edep();                                                           //take into account last step Eloss
842                           gMC->CurrentVolOffID(4,copy);                                           //take current chamber since geometry tree is Hmp-Hsec-Hgap-Hrow-Hcel
843       Int_t tid=          gMC->GetStack()->GetCurrentTrackNumber();                               //take TID
844       Int_t pid=          gMC->TrackPid();                                                        //take PID
845       Double_t out[3];    gMC->TrackPosition(out[0],out[1],out[2]);                               //take MARS position at exit
846       Float_t hitTime= (Float_t)gMC->TrackTime();                                                         //hit formation time       
847       out[0]=0.5*(out[0]+in[0]);                                                                  //>
848       out[1]=0.5*(out[1]+in[1]);                                                                  //take hit position at the anod plane
849       out[2]=0.5*(out[2]+in[2]);                                                                  //>
850       Float_t xl,yl;AliHMPIDParam::Instance()->Mars2Lors(copy,out,xl,yl);                         //take LORS position
851       new((*fHits)[fNhits++])AliHMPIDHit(copy,eloss,pid,tid,xl,yl,hitTime,out);                   //HIT for MIP, position near anod plane, eloss will be set to Q 
852       if(fDoFeed) GenFee(eloss);                                                                  //generate feedback photons 
853     }else                                                                                         //just going inside
854       eloss          += gMC->Edep();                                                              //collect this step eloss 
855   }//MIP in GAP
856 }//StepManager()
857 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
858 void AliHMPIDv2::TestPoint(Int_t ch,Float_t x,Float_t y)
859 {
860 // Utility method to check the validity of geometry by poviding some crucial points
861 // Arguments: ch,x,y- crucial point definition (cm) in LORS
862 //   Returns: none    
863   Double_t mars[3];
864   AliHMPIDParam::Instance()->Lors2Mars(ch,x,y,mars);
865   Printf("(ch=%i,locX=%.2f,locY=%.2f) %s",ch,x,y,gGeoManager->FindNode(mars[0],mars[1],mars[2])->GetName());
866 }//TestPoint()
867 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
868 void AliHMPIDv2::TestGeom()
869 {
870 //
871 // Test method to check geometry
872 //
873   //TGeoManager::Import("misaligned_geometry.root");
874   TGeoManager::Import("geometry.root");
875   for(Int_t ch=AliHMPIDParam::kMinCh;ch<=AliHMPIDParam::kMaxCh;ch++)
876     TestPoint(ch,0,0);
877 }//TestPoint()
878 //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
879
880 void  AliHMPIDv2::IdealPosition(Int_t iCh,TGeoHMatrix *pMatrix)       //ideal position of given chamber 
881 {
882 // Construct ideal position matrix for a given chamber
883 // Arguments: iCh- chamber ID; pMatrix- pointer to precreated unity matrix where to store the results
884 //   Returns: none
885   const Double_t kAngHor=19.5;        //  horizontal angle between chambers  19.5 grad
886   const Double_t kAngVer=20;          //  vertical angle between chambers    20   grad     
887   const Double_t kAngCom=30;          //  common HMPID rotation with respect to x axis  30   grad     
888   const Double_t kTrans[3]={490,0,0}; //  center of the chamber is on window-gap surface
889   pMatrix->RotateY(90);               //  rotate around y since initial position is in XY plane -> now in YZ plane
890   pMatrix->SetTranslation(kTrans);    //  now plane in YZ is shifted along x 
891   switch(iCh){
892     case 0:                pMatrix->RotateY(kAngHor);  pMatrix->RotateZ(-kAngVer);  break; //right and down 
893     case 1:                                            pMatrix->RotateZ(-kAngVer);  break; //down              
894     case 2:                pMatrix->RotateY(kAngHor);                               break; //right 
895     case 3:                                                                         break; //no rotation
896     case 4:                pMatrix->RotateY(-kAngHor);                              break; //left   
897     case 5:                                            pMatrix->RotateZ(kAngVer);   break; //up
898     case 6:                pMatrix->RotateY(-kAngHor); pMatrix->RotateZ(kAngVer);   break; //left and up 
899   }
900   pMatrix->RotateZ(kAngCom);     //apply common rotation  in XY plane    
901 }