New geometry: SDD, cables and update on V11 (L. Gaudichet)
[u/mrichter/AliRoot.git] / ITS / AliITSv11.cxx
1 /**************************************************************************
2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3  *                                                                        *
4  * Author: The ALICE Off-line Project.                                    *
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15
16 //************************************************************************
17 //                 Inner Traking System geometry v11
18 //
19 //  Based on ROOT geometrical modeler
20 //  Set #define WITHROOT in TGeant3.h
21 //
22 // B. Nilsen, L. Gaudichet
23 //************************************************************************
24
25
26 //#include <Riostream.h>
27 #include <TClonesArray.h>
28 #include <TLorentzVector.h>
29
30 #include "AliITS.h"
31 #include "AliITSDetType.h"
32 #include "AliITSGeant3Geometry.h"
33 #include "AliITSgeom.h"
34 #include "AliITSgeomSDD.h"
35 #include "AliITSgeomSPD.h"
36 #include "AliITSgeomSSD.h"
37 #include "AliITShit.h"
38 #include "AliITSresponseSDD.h"
39 #include "AliITSresponseSPD.h"
40 #include "AliITSresponseSSD.h"
41 #include "AliITSsegmentationSDD.h"
42 #include "AliITSsegmentationSPD.h"
43 #include "AliITSsegmentationSSD.h"
44 #include "AliITSv11.h"
45 #include "AliMagF.h"
46 #include "AliRun.h"
47 #include "AliTrackReference.h"
48 #include "AliMC.h"
49
50 #include <TGeoManager.h>
51 #include <TGeoVolume.h>
52 #include <TGeoPcon.h>
53 //#include "AliITSv11GeometrySPD.h"
54 #include "AliITSv11GeometrySDD.h"
55 //#include "AliITSv11GeometrySupport.h"
56
57
58
59 ClassImp(AliITSv11)
60  
61 //______________________________________________________________________
62   AliITSv11::AliITSv11() :
63     AliITS("ITS","ITS geometry v11"),
64     fGeomDetOut(kFALSE),
65     fGeomDetIn(kFALSE),
66     fMajorVersion(11),
67     fMinorVersion(0) {
68   //    Standard default constructor for the ITS version 11.
69   // Inputs:
70   //   none.
71   // Outputs:
72   //   none.
73   // Return:
74   //   none.
75   
76   Int_t i;
77   for(i=0;i<60;i++) fRead[i] = '\0';
78   for(i=0;i<60;i++) fWrite[i] = '\0';
79   for(i=0;i<60;i++) fEuclidGeomDet[i] = '\0';
80   strncpy(fRead,"$ALICE_ROOT/ITS/ITSgeometry_vPPRasymmFMD.det",60);
81   SetEUCLID(kFALSE);
82
83 //   fSPDgeom = new AliITSv11GeometrySPD();
84   fSDDgeom = new AliITSv11GeometrySDD();
85 //   fSupgeom = new AliITSv11GeometrySupport();
86
87   fIdN = 1;         
88   fIdName    = new TString[fIdN];
89   fIdName[0] = fSDDgeom->GetSenstiveVolumeMame();
90   fIdSens    = new Int_t[fIdN];
91   for(Int_t i=0; i<fIdN; i++) fIdSens[i] = 0;
92 }
93
94 //______________________________________________________________________
95 AliITSv11::AliITSv11(Int_t debugITS,Int_t debugSPD,Int_t debugSDD,
96                    Int_t debugSSD,Int_t debugSUP) :
97   AliITS("ITS","ITS geometry v11"),
98   fGeomDetOut(kFALSE),
99   fGeomDetIn(kFALSE),
100   fMajorVersion(11),
101   fMinorVersion(0) {
102   // Standard default constructor for the ITS version 11.
103   // Inputs:
104   //   Int_t    debugITS  Debug flag for ITS code (required).
105   //   Int_t    debugSPD  Debug flag for SPD geometry (default = 0).
106   //   Int_t    debugSDD  Debug flag for SDD geometry (default = 0).
107   //   Int_t    debugSSD  Debug flag for SSD geometry (default = 0).
108   //   Int_t    debugSUP  Debug flag for SUPort geometry (default = 0).
109   // Outputs:
110   //   none.
111   // Return
112
113   SetDensityServicesByThickness();
114
115   SetEUCLID(kFALSE);
116   fEuclidGeometry="$ALICE_ROOT/ITS/ITSgeometry_vPPRasymm2.euc";
117   strncpy(fEuclidGeomDet,"$ALICE_ROOT/ITS/ITSgeometry_vPPRasymm2.det",60);
118   strncpy(fRead,fEuclidGeomDet,60);
119   strncpy(fWrite,fEuclidGeomDet,60);
120   strncpy(fRead,"$ALICE_ROOT/ITS/ITSgeometry_vPPRasymmFMD.det",60);
121
122 //   fSPDgeom = new AliITSv11GeometrySPD(debugSPD);
123   fSDDgeom = new AliITSv11GeometrySDD(debugSDD);
124 //   fSupgeom = new AliITSv11GeometrySupport(debugSUP);
125
126   fIdN = 1;         
127   fIdName    = new TString[fIdN];
128   fIdName[0] = fSDDgeom->GetSenstiveVolumeMame();
129   fIdSens    = new Int_t[fIdN];
130   for(Int_t i=0; i<fIdN; i++) fIdSens[i] = 0;
131
132   debugITS = (debugSPD && debugSSD && debugSUP); //remove temp. warnings
133 }
134
135
136 //______________________________________________________________________
137 AliITSv11::AliITSv11(const AliITSv11 &source) :
138  AliITS(source){
139     //     Copy Constructor for ITS version 11. This function is not to be
140     // used. If any other instance of this function, other than "this" is
141     // passed, an error message is returned.
142     // Inputs:
143     //   const AliITSv11 &source This class
144
145     if(&source == this) return;
146     Warning("Copy Constructor","Not allowed to copy AliITSv11");
147     return;
148 }
149
150
151 //______________________________________________________________________
152 AliITSv11& AliITSv11::operator=(const AliITSv11 
153                                                   &source){
154     //     Assignment operator for the ITS version 11. This function is not 
155     // to be used. If any other instance of this function, other than "this" 
156     // is passed, an error message is returned.
157     // Inputs:
158     //   const AliITSv11 &source This class
159
160     if(&source == this) return *this;
161     Warning("= operator","Not allowed to copy AliITSv11");
162     return *this;
163 }
164
165
166 //______________________________________________________________________
167 AliITSv11::~AliITSv11() {
168   delete fSDDgeom;
169 }
170
171
172 //______________________________________________________________________
173 void AliITSv11::BuildGeometry(){
174
175 }
176
177
178 //______________________________________________________________________
179 void AliITSv11::CreateGeometry(){
180   //
181   // Create ROOT geometry
182   //
183
184   TGeoManager *geoManager = gGeoManager;
185   TGeoVolume *vALIC = geoManager->GetTopVolume();
186
187   TGeoPcon *sITS = new TGeoPcon("ITS Top Volume",0.0,360.0,2);
188
189   // DefineSection(section number, Z, Rmin, Rmax).
190   const Double_t kcm = 1.0;
191   sITS->DefineSection(0,-300.0*kcm,0.01*kcm,50.0*kcm);
192   sITS->DefineSection(1,+300.0*kcm,0.01*kcm,50.0*kcm);
193
194   TGeoMedium *air = gGeoManager->GetMedium("ITSair");
195   TGeoVolume *vITS = new TGeoVolume("vITS",sITS,air);
196   vITS->SetVisibility(kFALSE);
197   vALIC->AddNode(vITS,1,0);
198
199 //   fSPDgeom->CenteralSPD(vITS);
200   fSDDgeom->Layer3(vITS);
201   fSDDgeom->Layer4(vITS);
202 //     fSupgeom->SPDCone(vITS);
203 //     fSupgeom->SPDThermalSheald(vITS);
204 //     fSupgeom->SDDCone(vITS);
205 //     fSupgeom->SSDCone(vITS);
206 //     fSupgeom->ServicesCableSupport(vITS);
207
208 }
209
210
211 //______________________________________________________________________
212 void AliITSv11::CreateMaterials(){
213   //
214   // Create ITS materials
215   // Defined media here should correspond to the one defined in galice.cuts
216   // File which is red in (AliMC*) fMCApp::Init() { ReadTransPar(); }
217   //
218
219     Int_t   ifield = gAlice->Field()->Integ();
220     Float_t fieldm = gAlice->Field()->Max();
221
222     Float_t tmaxfd = 0.1; // 1.0; // Degree
223     Float_t stemax = 1.0; // cm
224     Float_t deemax = 0.1; // 30.0; // Fraction of particle's energy 0<deemax<=1
225     Float_t epsil  = 1.0E-4; // 1.0; // cm
226     Float_t stmin  = 0.0; // cm "Default value used"
227
228     Float_t tmaxfdSi = 0.1; // .10000E+01; // Degree
229     Float_t stemaxSi = 0.0075; //  .10000E+01; // cm
230     Float_t deemaxSi = 0.1; // 0.30000E-02; // Fraction of particle's energy 0<deemax<=1
231     Float_t epsilSi  = 1.0E-4;// .10000E+01;
232     Float_t stminSi  = 0.0; // cm "Default value used"
233
234     Float_t tmaxfdAir = 0.1; // .10000E+01; // Degree
235     Float_t stemaxAir = .10000E+01; // cm
236     Float_t deemaxAir = 0.1; // 0.30000E-02; // Fraction of particle's energy 0<deemax<=1
237     Float_t epsilAir  = 1.0E-4;// .10000E+01;
238     Float_t stminAir  = 0.0; // cm "Default value used"
239
240     Float_t tmaxfdServ = 1.0; // 10.0; // Degree
241     Float_t stemaxServ = 1.0; // 0.01; // cm
242     Float_t deemaxServ = 0.5; // 0.1; // Fraction of particle's energy 0<deemax<=1
243     Float_t epsilServ  = 1.0E-3; // 0.003; // cm
244     Float_t stminServ  = 0.0; //0.003; // cm "Default value used"
245
246     // Freon PerFluorobuthane C4F10 see 
247     // http://st-support-cooling-electronics.web.cern.ch/
248     //        st-support-cooling-electronics/default.htm
249     Float_t afre[2]  = { 12.011,18.9984032 };
250     Float_t zfre[2]  = { 6., 9. };
251     Float_t wfre[2]  = { 4.,10. };
252     Float_t densfre  = 1.52;
253
254
255     //CM55J
256     Float_t aCM55J[4]={12.0107,14.0067,15.9994,1.00794};
257     Float_t zCM55J[4]={6.,7.,8.,1.};
258     Float_t wCM55J[4]={0.908508078,0.010387573,0.055957585,0.025146765};
259     Float_t dCM55J = 1.63;
260
261     //ALCM55J
262     Float_t aALCM55J[5]={12.0107,14.0067,15.9994,1.00794,26.981538};
263     Float_t zALCM55J[5]={6.,7.,8.,1.,13.};
264     Float_t wALCM55J[5]={0.817657902,0.0093488157,0.0503618265,0.0226320885,0.1};
265     Float_t dALCM55J = 1.9866;
266
267     //Si Chips
268     Float_t aSICHIP[6]={12.0107,14.0067,15.9994,1.00794,28.0855,107.8682};
269     Float_t zSICHIP[6]={6.,7.,8.,1.,14., 47.};
270     Float_t wSICHIP[6]={0.039730642,0.001396798,0.01169634,
271                         0.004367771,0.844665,0.09814344903};
272     Float_t dSICHIP = 2.36436;
273
274     //Inox
275     Float_t aINOX[9]={12.0107,54.9380, 28.0855,30.9738,32.066,
276                       58.6928,55.9961,95.94,55.845};
277     Float_t zINOX[9]={6.,25.,14.,15.,16., 28.,24.,42.,26.};
278     Float_t wINOX[9]={0.0003,0.02,0.01,0.00045,0.0003,0.12,0.17,0.025,0.654};
279     Float_t dINOX = 8.03;
280
281     //SDD HV microcable
282     Float_t aHVm[5]={12.0107,1.00794,14.0067,15.9994,26.981538};
283     Float_t zHVm[5]={6.,1.,7.,8.,13.};
284     Float_t wHVm[5]={0.520088819984,0.01983871336,0.0551367996,0.157399667056, 0.247536};
285     Float_t dHVm = 1.6087;
286
287     //SDD LV+signal cable
288     Float_t aLVm[5]={12.0107,1.00794,14.0067,15.9994,26.981538};
289     Float_t zLVm[5]={6.,1.,7.,8.,13.};
290     Float_t wLVm[5]={0.21722436468,0.0082859922,0.023028867,0.06574077612, 0.68572};
291     Float_t dLVm = 2.1035;
292
293     //SDD hybrid microcab
294     Float_t aHLVm[5]={12.0107,1.00794,14.0067,15.9994,26.981538};
295     Float_t zHLVm[5]={6.,1.,7.,8.,13.};
296     Float_t wHLVm[5]={0.24281879711,0.00926228815,0.02574224025,0.07348667449, 0.64869};
297     Float_t dHLVm = 2.0502;
298
299     //SDD anode microcab
300     Float_t aALVm[5]={12.0107,1.00794,14.0067,15.9994,26.981538};
301     Float_t zALVm[5]={6.,1.,7.,8.,13.};
302     Float_t wALVm[5]={0.392653705471,0.0128595919215,
303                       0.041626868025,0.118832707289, 0.431909};
304     Float_t dALVm = 2.0502;
305
306     //X7R capacitors
307     Float_t aX7R[7]={137.327,47.867,15.9994,58.6928,63.5460,118.710,207.2};
308     Float_t zX7R[7]={56.,22.,8.,28.,29.,50.,82.};
309     Float_t wX7R[7]={0.251639432,0.084755042,0.085975822,
310                      0.038244751,0.009471271,0.321736471,0.2081768};
311     Float_t dX7R = 7.14567;
312
313     // AIR
314     Float_t aAir[4]={12.0107,14.0067,15.9994,39.948};
315     Float_t zAir[4]={6.,7.,8.,18.};
316     Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
317     Float_t dAir = 1.20479E-3;
318
319     // Water
320     Float_t aWater[2]={1.00794,15.9994};
321     Float_t zWater[2]={1.,8.};
322     Float_t wWater[2]={0.111894,0.888106};
323     Float_t dWater   = 1.0;
324
325     // CERAMICS
326   //     94.4% Al2O3 , 2.8% SiO2 , 2.3% MnO , 0.5% Cr2O3
327     Float_t acer[5]  = { 26.981539,15.9994,28.0855,54.93805,51.9961 };
328     Float_t zcer[5]  = {       13.,     8.,    14.,     25.,    24. };
329     Float_t wcer[5]  = {.4443408,.5213375,.0130872,.0178135,.003421};
330     Float_t denscer  = 3.6;
331
332     //G10FR4
333     Float_t zG10FR4[14] = {14.00,       20.00,  13.00,  12.00,  5.00,
334                            22.00,       11.00,  19.00,  26.00,  9.00,
335                            8.00,        6.00,   7.00,   1.00};
336     Float_t aG10FR4[14] = {28.0855000,40.0780000,26.9815380,24.3050000,
337                            10.8110000,47.8670000,22.9897700,39.0983000,
338                            55.8450000,18.9984000,15.9994000,12.0107000,
339                            14.0067000,1.0079400};
340     Float_t wG10FR4[14] = {0.15144894,0.08147477,0.04128158,0.00904554,
341                            0.01397570,0.00287685,0.00445114,0.00498089,
342                            0.00209828,0.00420000,0.36043788,0.27529426,
343                            0.01415852,0.03427566};
344     Float_t densG10FR4= 1.8;
345     
346      //--- EPOXY  --- C18 H19 O3
347       Float_t aEpoxy[3] = {15.9994, 1.00794, 12.0107} ; 
348       Float_t zEpoxy[3] = {     8.,      1.,      6.} ; 
349       Float_t wEpoxy[3] = {     3.,     19.,     18.} ; 
350       Float_t dEpoxy = 1.8 ;
351
352       // rohacell: C9 H13 N1 O2
353     Float_t arohac[4] = {12.01,  1.01, 14.010, 16.};
354     Float_t zrohac[4] = { 6.,    1.,    7.,     8.};
355     Float_t wrohac[4] = { 9.,   13.,    1.,     2.};
356     Float_t drohac    = 0.05;
357
358     // If he/she means stainless steel (inox) + Aluminium and Zeff=15.3383 then
359 //
360 // %Al=81.6164 %inox=100-%Al
361
362     Float_t aInAl[5] = {27., 55.847,51.9961,58.6934,28.0855 };
363     Float_t zInAl[5] = {13., 26.,24.,28.,14. };
364     Float_t wInAl[5] = {.816164, .131443,.0330906,.0183836,.000919182};
365     Float_t dInAl    = 3.075;
366
367     // Kapton
368     Float_t aKapton[4]={1.00794,12.0107, 14.010,15.9994};
369     Float_t zKapton[4]={1.,6.,7.,8.};
370     Float_t wKapton[4]={0.026362,0.69113,0.07327,0.209235};
371     Float_t dKapton   = 1.42;
372
373     //SDD ruby sph.
374     Float_t aAlOxide[2]  = { 26.981539,15.9994};
375     Float_t zAlOxide[2]  = {       13.,     8.};
376     Float_t wAlOxide[2]  = {0.4707, 0.5293};
377     Float_t dAlOxide     = 3.97;
378
379     //---------
380     AliMaterial(1,"ITSsddSi",0.28086E+02,0.14000E+02,0.23300E+01,0.93600E+01,0.99900E+03);
381     AliMedium(1,"ITSsddSi",1,0,ifield,fieldm,tmaxfdSi,stemaxSi,deemaxSi,epsilSi,stminSi);
382     
383     AliMixture(5,"ITSair",aAir,zAir,dAir,4,wAir);
384     AliMedium(5,"ITSair",5,0,ifield,fieldm,tmaxfdAir,stemaxAir,deemaxAir,epsilAir,stminAir);
385     
386     AliMixture(7,"ITSsddSiChip",aSICHIP,zSICHIP,dSICHIP,6,wSICHIP);
387     AliMedium(7,"ITSsddSiChip",7,0,ifield,fieldm,tmaxfdSi,stemaxSi,deemaxSi,epsilSi,stminSi);
388
389     AliMaterial(79,"SDD SI insensitive$",0.28086E+02,0.14000E+02,0.23300E+01,0.93600E+01,0.99900E+03);
390     AliMedium(79,"SDD SI insensitive$",79,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
391
392     AliMaterial(11,"ITSal",0.26982E+02,0.13000E+02,0.26989E+01,0.89000E+01,0.99900E+03);
393     AliMedium(11,"ITSal",11,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
394
395     AliMixture(9,"ITSsddCarbonM55J",aCM55J,zCM55J,dCM55J,4,wCM55J);
396     AliMedium(9,"ITSsddCarbonM55J",9,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
397
398     AliMixture(10,"SDD AIR$",aAir,zAir,dAir,4,wAir);
399     AliMedium(10,"SDD AIR$",10,0,ifield,fieldm,tmaxfdAir,stemaxAir,deemaxAir,epsilAir,stminAir);
400
401     AliMixture(12, "WATER",aWater,zWater,dWater,2,wWater);
402     AliMedium(12,"WATER",12,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
403
404      AliMixture(69,"ITSsddCAlM55J",aALCM55J,zALCM55J,dALCM55J,5,wALCM55J);
405     AliMedium(69,"ITSsddCAlM55J",69,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
406   
407     AliMixture(70, "ITSsddKAPTON_POLYCH2", aKapton, zKapton, dKapton, 4, wKapton);
408     AliMedium(70,"ITSsddKAPTON_POLYCH2",70,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
409
410     AliMixture(77,"SDDX7Rcapacitors",aX7R,zX7R,dX7R,7,wX7R);
411     AliMedium(77,"SDDX7Rcapacitors",77,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
412
413     AliMixture(78,"SDD ruby sph. Al2O3$",aAlOxide,zAlOxide,dAlOxide,2,wAlOxide);
414     AliMedium(78,"SDD ruby sph. Al2O3$",78,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
415
416
417     AliMaterial(64,"ALUMINUM$",0.26982E+02,0.13000E+02,0.26989E+01,0.89000E+01,0.99900E+03);
418     AliMedium(64,"ALUMINUM$",64,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
419
420     AliMaterial(14,"COPPER",0.63546E+02,0.29000E+02,0.89600E+01,0.14300E+01,0.99900E+03);
421     AliMedium(14,"COPPER",14,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
422
423     AliMaterial(2,"SPD SI CHIP$",0.28086E+02,0.14000E+02,0.23300E+01,0.93600E+01,0.99900E+03);
424     AliMedium(2,"SPD SI CHIP$",2,0,ifield,fieldm,tmaxfdSi,stemaxSi,deemaxSi,epsilSi,stminSi);
425
426     AliMaterial(3,"SPD SI BUS$",0.28086E+02,0.14000E+02,0.23300E+01,0.93600E+01,0.99900E+03);
427     AliMedium(3,"SPD SI BUS$",3,0,ifield,fieldm,tmaxfdSi,stemaxSi,deemaxSi,epsilSi,stminSi);
428
429     AliMixture(4,"C (M55J)$",aCM55J,zCM55J,dCM55J,4,wCM55J);
430     AliMedium(4,"C (M55J)$",4,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
431
432  
433     AliMixture(6,"GEN AIR$",aAir,zAir,dAir,4,wAir);
434     AliMedium(6,"GEN AIR$",6,0,ifield,fieldm,tmaxfdAir,stemaxAir,deemaxAir,epsilAir,stminAir);
435
436     AliMixture(13,"Freon$",afre,zfre,densfre,-2,wfre);
437     AliMedium(13,"Freon$",13,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
438
439
440     AliMixture(15,"CERAMICS$",acer,zcer,denscer,5,wcer);
441     AliMedium(15,"CERAMICS$",15,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
442
443     AliMixture(20,"SSD C (M55J)$",aCM55J,zCM55J,dCM55J,4,wCM55J);
444     AliMedium(20,"SSD C (M55J)$",20,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
445
446     AliMixture(21,"SSD AIR$",aAir,zAir,dAir,4,wAir);
447     AliMedium(21,"SSD AIR$",21,0,ifield,fieldm,tmaxfdAir,stemaxAir,deemaxAir,epsilAir,stminAir);
448
449     AliMixture(25,"G10FR4$",aG10FR4,zG10FR4,densG10FR4,14,wG10FR4);
450     AliMedium(25,"G10FR4$",25,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
451
452      AliMixture(26,"GEN C (M55J)$",aCM55J,zCM55J,dCM55J,4,wCM55J);
453     AliMedium(26,"GEN C (M55J)$",26,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
454
455     AliMixture(27,"GEN Air$",aAir,zAir,dAir,4,wAir);
456     AliMedium(27,"GEN Air$",27,0,ifield,fieldm,tmaxfdAir,stemaxAir,deemaxAir,epsilAir,stminAir);
457
458     AliMaterial(51,"SPD SI$",0.28086E+02,0.14000E+02,0.23300E+01,0.93600E+01,0.99900E+03);
459     AliMedium(51,"SPD SI$",51,0,ifield,fieldm,tmaxfdSi,stemaxSi,deemaxSi,epsilSi,stminSi);
460
461     AliMaterial(52,"SPD SI CHIP$",0.28086E+02,0.14000E+02,0.23300E+01,0.93600E+01,0.99900E+03);
462     AliMedium(52,"SPD SI CHIP$",52,0,ifield,fieldm,tmaxfdSi,stemaxSi,deemaxSi,epsilSi,stminSi);
463
464     AliMaterial(53,"SPD SI BUS$",0.28086E+02,0.14000E+02,0.23300E+01,0.93600E+01,0.99900E+03);
465     AliMedium(53,"SPD SI BUS$",53,0,ifield,fieldm,tmaxfdSi,stemaxSi,deemaxSi,epsilSi,stminSi);
466
467     AliMixture(54,"SPD C (M55J)$",aCM55J,zCM55J,dCM55J,4,wCM55J);
468     AliMedium(54,"SPD C (M55J)$",54,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
469
470     AliMixture(55,"SPD AIR$",aAir,zAir,dAir,4,wAir);
471     AliMedium(55,"SPD AIR$",55,0,ifield,fieldm,tmaxfdAir,stemaxAir,deemaxAir,epsilAir,stminAir);
472
473     AliMixture(56, "SPD KAPTON(POLYCH2)", aKapton, zKapton, dKapton, 4, wKapton);
474     AliMedium(56,"SPD KAPTON(POLYCH2)$",56,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
475
476     AliMixture(61,"EPOXY$",aEpoxy,zEpoxy,dEpoxy,-3,wEpoxy);
477     AliMedium(61,"EPOXY$",61,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
478
479     AliMaterial(62,"SILICON$",0.28086E+02,0.14000E+02,0.23300E+01,0.93600E+01,0.99900E+03);
480     AliMedium(62,"SILICON$",62,0,ifield,fieldm,tmaxfdSi,stemaxSi,deemaxSi,epsilSi,stminSi);
481
482     AliMixture(63, "KAPTONH(POLYCH2)", aKapton, zKapton, dKapton, 4, wKapton);
483     AliMedium(63,"KAPTONH(POLYCH2)$",63,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
484
485
486     AliMixture(65,"INOX$",aINOX,zINOX,dINOX,9,wINOX);
487     AliMedium(65,"INOX$",65,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
488
489     AliMixture(68,"ROHACELL$",arohac,zrohac,drohac,-4,wrohac);
490     AliMedium(68,"ROHACELL$",68,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
491
492
493      AliMaterial(71,"ITS SANDW A$",0.12011E+02,0.60000E+01,0.2115E+00,0.17479E+03,0.99900E+03);
494     AliMedium(71,"ITS SANDW A$",71,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
495
496     AliMaterial(72,"ITS SANDW B$",0.12011E+02,0.60000E+01,0.27000E+00,0.18956E+03,0.99900E+03);
497     AliMedium(72,"ITS SANDW B$",72,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
498
499     AliMaterial(73,"ITS SANDW C$",0.12011E+02,0.60000E+01,0.41000E+00,0.90868E+02,0.99900E+03);
500     AliMedium(73,"ITS SANDW C$",73,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
501
502     AliMaterial(74,"HEAT COND GLUE$",0.12011E+02,0.60000E+01,0.1930E+01,0.22100E+02,0.99900E+03);
503     AliMedium(74,"HEAT COND GLUE$",74,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
504
505     AliMaterial(75,"ELASTO SIL$",0.28086E+02,0.14000E+02,0.23300E+01,0.93600E+01,0.99900E+03);
506     AliMedium(75,"ELASTO SIL$",75,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
507
508     AliMaterial(76,"SPDBUS(AL+KPT+EPOX)$",0.19509E+02,0.96502E+01,0.19060E+01,0.15413E+02,0.99900E+03);
509     AliMedium(76,"SPDBUS(AL+KPT+EPOX)$",76,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
510                
511
512     AliMixture(80,"SDD HV microcable$",aHVm,zHVm,dHVm,5,wHVm);
513     AliMedium(80,"SDD HV microcable$",80,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
514
515     AliMixture(81,"SDD LV+signal cable$",aLVm,zLVm,dLVm,5,wLVm);
516     AliMedium(81,"SDD LV+signal cable$",81,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
517
518     AliMixture(82,"SDD hybrid microcab$",aHLVm, zHLVm,dHLVm,5,wHLVm);
519     AliMedium(82,"SDD hybrid microcab$",82,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
520
521     AliMixture(83,"SDD anode microcab$",aALVm,zALVm,dALVm,5,wALVm);
522     AliMedium(83,"SDD anode microcab$",83,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
523
524     AliMaterial(84,"SDD/SSD rings$",0.123565E+02,0.64561E+01,0.18097E+01,0.229570E+02,0.99900E+03);
525     AliMedium(84,"SDD/SSD rings$",84,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
526
527     AliMixture(85,"inox/alum$",aInAl,zInAl,dInAl,5,wInAl);
528     AliMedium(85,"inox/alum$",85,0,ifield,fieldm,tmaxfd,stemax,deemax,epsil,stmin);
529
530
531     // special media to take into account services in the SDD and SSD 
532     // cones for the FMD
533
534        Float_t aA[13],zZ[13],wW[13],den;
535     // From Pierluigi Barberis calculations of 2SPD+1SDD October 2 2002.
536     zZ[0] = 1.0; aA[0] = 1.00794; // Hydrogen
537     zZ[1] = 6.0; aA[1] = 12.011; // Carbon
538     zZ[2] = 7.0; aA[2] = 14.00674; // Nitrogen
539     zZ[3] = 8.0; aA[3] = 15.9994; // Oxigen
540     zZ[4] = 14.0; aA[4] = 28.0855; // Silicon
541     zZ[5] = 24.0; aA[5] = 51.9961; //Cromium
542     zZ[6] = 25.0; aA[6] = 54.938049; // Manganese
543     zZ[7] = 26.0; aA[7] = 55.845; // Iron
544     zZ[8] = 28.0; aA[8] = 58.6934; // Nickle
545     zZ[9] = 29.0; aA[9] = 63.546; // Copper
546     zZ[10] = 13.0; aA[10] = 26.981539; // Alulminum
547     zZ[11] = 47.0; aA[11] = 107.8682; // Silver
548     zZ[12] = 27.0; aA[12] = 58.9332; // Cobolt
549     wW[0] = 0.019965;
550     wW[1] = 0.340961;
551     wW[2] = 0.041225;
552     wW[3] = 0.200352;
553     wW[4] = 0.000386;
554     wW[5] = 0.001467;
555     wW[6] = 0.000155;
556     wW[7] = 0.005113;
557     wW[8] = 0.000993;
558     wW[9] = 0.381262;
559     wW[10] = 0.008121;
560     wW[11] = 0.000000;
561     wW[12] = 0.000000;
562     if(fByThick){// New values seeITS_MatBudget_4B.xls
563         den = 1.5253276; // g/cm^3  Cell O370
564     }else{
565         den = 2.58423412; // g/cm^3 Cell L370
566     } // end if fByThick
567     //den = 6161.7/(3671.58978);//g/cm^3 Volume does not exclude holes
568     AliMixture(86,"AIRFMDSDD$",aA,zZ,den,+11,wW);
569     AliMedium(86,"AIRFMDSDD$",86,0,ifield,fieldm,tmaxfdAir,stemaxAir,
570               deemaxAir,epsilAir,stminAir);
571
572
573     wW[0] = 0.019777;
574     wW[1] = 0.325901;
575     wW[2] = 0.031848;
576     wW[3] = 0.147668;
577     wW[4] = 0.030609;
578     wW[5] = 0.013993;
579     wW[6] = 0.001479;
580     wW[7] = 0.048792;
581     wW[8] = 0.009477;
582     wW[9] = 0.350697;
583     wW[10] = 0.014546;
584     wW[11] = 0.005213;
585     wW[12] = 0.000000;
586     if(fByThick){// New values seeITS_MatBudget_4B.xls
587         den = 1.2464275; // g/cm^3   Cell O403
588     }else{
589         den = 1.28134409; // g/cm^3  Cell L403
590     } // end if fByThick
591     //den = 7666.3/(9753.553259); // volume does not exclude holes
592     AliMixture(87,"AIRFMDSSD$",aA,zZ,den,+12,wW); 
593     AliMedium(87,"AIRFMDSSD$",87,0,ifield,fieldm,tmaxfdAir,stemaxAir,
594               deemaxAir,epsilAir,stminAir);
595
596     wW[0] = 0.016302;
597     wW[1] = 0.461870;
598     wW[2] = 0.033662;
599     wW[3] = 0.163595;
600     wW[4] = 0.000315;
601     wW[5] = 0.001197;
602     wW[6] = 0.000127;
603     wW[7] = 0.004175;
604     wW[8] = 0.000811;
605     wW[9] = 0.311315;
606     wW[10] = 0.006631;
607     wW[11] = 0.000000;
608     wW[12] = 0.000000;
609     if(fByThick){// New values seeITS_MatBudget_4B.xls
610         den = 1.9353276; // g/cm^3  Cell N370
611     }else{
612         den = 3.2788626; // g/cm^3 Cell F370
613     } // end if fByThick
614     //den = 7667.1/(3671.58978); // Volume does not excludeholes
615     AliMixture(88,"ITS SANDW CFMDSDD$",aA,zZ,den,+11,wW); 
616     AliMedium(88,"ITS SANDW CFMDSDD$",88,0,ifield,fieldm,tmaxfd,stemax,
617               deemax,epsil,stmin);
618
619     wW[0] = 0.014065;
620     wW[1] = 0.520598;
621     wW[2] = 0.022650;
622     wW[3] = 0.105018;
623     wW[4] = 0.021768;
624     wW[5] = 0.009952;
625     wW[6] = 0.001051;
626     wW[7] = 0.034700;
627     wW[8] = 0.006740;
628     wW[9] = 0.249406;
629     wW[10] = 0.010345;
630     wW[11] = 0.0003707;
631     wW[12] = 0.000000;
632     if(fByThick){// New values seeITS_MatBudget_4B.xls
633         den = 1.6564275; // g/cm^3  Cell N304
634     }else{
635         den = 1.7028296; // g/cm^3  Cell F304
636     } // end if fByThick
637     //den = 1166.5/(3671.58978); // Volume does not exclude holes
638     AliMixture(89,"ITS SANDW CFMDSSD$",aA,zZ,den,+12,wW); 
639     AliMedium(89,"ITS SANDW CFMDSSD$",89,0,ifield,fieldm,tmaxfd,stemax,
640               deemax,epsil,stmin);
641
642     wW[0] = 0.005970;
643     wW[1] = 0.304704;
644     wW[2] = 0.042510;
645     wW[3] = 0.121715;
646     wW[4] = 0.001118;
647     wW[5] = 0.030948;
648     wW[6] = 0.003270;
649     wW[7] = 0.107910;
650     wW[8] = 0.020960;
651     wW[9] = 0.360895;
652     wW[10] = 0.000000;
653     wW[11] = 0.000000;
654     wW[12] = 0.000000;
655     if(fByThick){// New values seeITS_MatBudget_4B.xls
656         den = 80.31136576; // g/cm^3 Cell H329
657     }else{
658         den = 87.13062; // g/cm^3  Cell G329
659     } // end if fByThick
660     //den = 1251.3/(0.05*2.0*TMath::Pi()*(7.75*7.75 - 3.7*3.7)); // g/cm^3
661     AliMixture(97,"SPD SERVICES$",aA,zZ,den,+10,wW); 
662     AliMedium(97,"SPD SERVICES$",97,0,ifield,fieldm,tmaxfd,stemax,
663               deemax,epsil,stmin);
664
665     // Special media
666
667     AliMaterial(90,"SPD shield$", 12.011, 6., 1.93/10. , 22.1*10., 999);
668     AliMedium(90,"SPD shield$",90,0,ifield,fieldm,tmaxfdServ,stemaxServ,
669               deemaxServ,epsilServ,stminServ);
670
671     AliMaterial(91, "SPD End ladder$", 47.0447, 21.7963, 3.6374, 4.4711, 999); 
672     AliMedium(91,"SPD End ladder$",91,0,ifield,fieldm,tmaxfdServ,stemaxServ,
673               deemaxServ,epsilServ,stminServ);
674
675     AliMaterial(92, "SPD cone$",28.0855, 14., 2.33, 9.36, 999);    
676     AliMedium(92,"SPD cone$",92,0,ifield,fieldm,tmaxfdServ,stemaxServ,
677               deemaxServ,epsilServ,stminServ);
678
679 //     Material with fractional Z not actually used
680 //     AliMaterial(93, "SDD End ladder$", 69.9298, 29.8246, 0.3824, 36.5103, 999);
681 //     AliMedium(93,"SDD End ladder$",93,0,ifield,fieldm,tmaxfdServ,stemaxServ,
682 //               deemaxServ,epsilServ,stminServ);
683
684     AliMaterial(94, "SDD cone$",63.546, 29., 1.15, 1.265, 999);
685     AliMedium(94,"SDD cone$",94,0,ifield,fieldm,tmaxfdServ,stemaxServ,
686               deemaxServ,epsilServ,stminServ);
687
688 //     Material with fractional Z not actually used
689 //     AliMaterial(95, "SSD End ladder$", 32.0988, 15.4021, 0.68, 35.3238, 999); 
690 //     AliMedium(95,"SSD End ladder$",95,0,ifield,fieldm,tmaxfdServ,stemaxServ,
691 //     deemaxServ,epsilServ,stminServ);
692
693     AliMaterial(96, "SSD cone$",63.546, 29., 1.15, 1.265, 999);
694     AliMedium(96,"SSD cone$",96,0,ifield,fieldm,tmaxfdServ,stemaxServ,
695               deemaxServ,epsilServ,stminServ);
696
697 }
698
699
700 //______________________________________________________________________
701 void AliITSv11::InitAliITSgeom(){
702   //
703   // Fill fITSgeom with the 3 sub-detector geometries
704   //
705
706   const Int_t knlayers = 2;             // only SDD for the moment
707   Int_t nlad[knlayers],ndet[knlayers];
708   nlad[0]=14; nlad[1]=22;
709   ndet[0]=6;  ndet[1]=8;
710   Int_t mod = nlad[0]*ndet[0]+nlad[1]*ndet[1];
711   if (fITSgeom) delete fITSgeom;
712   fITSgeom = new AliITSgeom(0,knlayers,nlad,ndet,mod);
713
714
715   //***************************************************
716   //               Set default shapes 
717   // (These default shapes won't exist anymore when all
718   //  layers are coded)
719
720   const Float_t kDxyzSPD[] = {0.6400, 0.015,   3.480};  
721   if(!(fITSgeom->IsShapeDefined(kSPD)))
722     fITSgeom->ReSetShape(kSPD,
723                          new AliITSgeomSPD425Short(3,(Float_t *)kDxyzSPD));
724
725   const Float_t kDxyzSSD[] = {3.6500, 0.0150,  2.000};
726   if(!(fITSgeom->IsShapeDefined(kSSD)))
727     fITSgeom->ReSetShape(kSSD,
728                          new AliITSgeomSSD75and275(3,(Float_t *)kDxyzSSD));
729
730   //*****************************************
731   fSDDgeom->ExportSensorGeometry(fITSgeom, +1, 0);  //SDD
732
733   return;
734 }
735
736
737 //______________________________________________________________________
738 void AliITSv11::Init(){
739   //
740   //     Initialise the ITS after it has been created.
741   //
742
743     Int_t i;
744
745     for(i=0;i<20;i++) printf("*");
746     printf( " ITSv%i.%i_Init ", fMajorVersion,fMinorVersion );
747     for(i=0;i<20;i++) printf("*"); printf("\n");
748
749     // Create geometry
750     if(fRead[0]=='\0') strncpy(fRead,fEuclidGeomDet,60);
751     if(fWrite[0]=='\0') strncpy(fWrite,fEuclidGeomDet,60);
752     if(fITSgeom!=0) delete fITSgeom;
753     fITSgeom = new AliITSgeom();
754     if(fGeomDetIn) fITSgeom->ReadNewFile(fRead);
755     else this->InitAliITSgeom();
756     if(fGeomDetOut) fITSgeom->WriteNewFile(fWrite);
757
758     // Initialize AliITS
759     AliITS::Init();
760
761     for(i=0;i<40+16;i++) printf("*"); printf("\n");
762 }
763
764
765 //______________________________________________________________________
766 void AliITSv11::SetDefaults(){
767   //
768   // Set response ans segmentation models for SPD, SDD and SSD
769   //
770
771   printf("AliITSv11::SetDefaults :\n");
772   const Float_t kconv = 1.0e+04; // convert cm to microns
773
774   AliITSDetType *iDetType;
775   AliITSgeomSPD  *s0;
776   AliITSgeomSDD  *s1;
777   AliITSgeomSSD  *s2;
778   Int_t i;
779   Float_t bx[256],bz[280];
780
781   //================================================ SPD
782   iDetType=DetType(kSPD);
783   s0 = (AliITSgeomSPD*) fITSgeom->GetShape(kSPD);// Get shape info. Do it this way for now.
784   // If some SPD detectors have been inserted in t
785   if (s0) {
786     AliITSresponse *resp0=new AliITSresponseSPD();
787     SetResponseModel(kSPD,resp0);
788     AliITSsegmentationSPD *seg0=new AliITSsegmentationSPD(fITSgeom);
789     seg0->SetDetSize(s0->GetDx()*2.*kconv, // base this on AliITSgeomSPD
790                      s0->GetDz()*2.*kconv, // for now.
791                      s0->GetDy()*2.*kconv); // x,z,y full width in microns.
792     seg0->SetNPads(256,160);// Number of Bins in x and z
793     for(i=000;i<256;i++) bx[i] =  50.0; // in x all are 50 microns.
794     for(i=000;i<160;i++) bz[i] = 425.0; // most are 425 microns except below
795     for(i=160;i<280;i++) bz[i] =   0.0; // Outside of detector.
796     bz[ 31] = bz[ 32] = 625.0; // first chip boundry
797     bz[ 63] = bz[ 64] = 625.0; // first chip boundry
798     bz[ 95] = bz[ 96] = 625.0; // first chip boundry
799     bz[127] = bz[128] = 625.0; // first chip boundry
800     bz[160] = 425.0; // Set so that there is no zero pixel size for fNz.
801     seg0->SetBinSize(bx,bz); // Based on AliITSgeomSPD for now.
802     SetSegmentationModel(kSPD,seg0);
803     // set digit and raw cluster classes to be used
804     const char *kData0=(iDetType->GetResponseModel())->DataType();
805     if (strstr(kData0,"real")) iDetType->ClassNames("AliITSdigit",
806                                                     "AliITSRawClusterSPD");
807     else iDetType->ClassNames("AliITSdigitSPD","AliITSRawClusterSPD");
808   };
809   
810   //================================================ SDD
811   iDetType=DetType(kSDD);
812   s1 = (AliITSgeomSDD*) fITSgeom->GetShape(kSDD);// Get shape info. Do it this way for now.
813   if (s1) {
814     AliITSresponseSDD *resp1=new AliITSresponseSDD("simulated");
815     SetResponseModel(kSDD,resp1);
816     AliITSsegmentationSDD *seg1=new AliITSsegmentationSDD(fITSgeom,resp1);
817     seg1->SetDetSize(s1->GetDx()*kconv, // base this on AliITSgeomSDD
818                      s1->GetDz()*2.*kconv, // for now.
819                      s1->GetDy()*2.*kconv); // x,z,y full width in microns.
820     seg1->SetNPads(256,256);// Use AliITSgeomSDD for now
821     SetSegmentationModel(kSDD,seg1);
822     const char *kData1=(iDetType->GetResponseModel())->DataType();
823     const char *kopt=iDetType->GetResponseModel()->ZeroSuppOption();
824     if((!strstr(kopt,"2D")) && (!strstr(kopt,"1D")) || strstr(kData1,"real") ){
825       iDetType->ClassNames("AliITSdigit","AliITSRawClusterSDD");
826     } else iDetType->ClassNames("AliITSdigitSDD","AliITSRawClusterSDD");
827   };
828   
829   //================================================ SSD  Layer 5
830   iDetType=DetType(kSSD);
831   s2 = (AliITSgeomSSD*) fITSgeom->GetShape(kSSD);// Get shape info. Do it this way for now.
832   if (s2) {
833     AliITSresponse *resp2=new AliITSresponseSSD("simulated");
834     SetResponseModel(kSSD,resp2);
835     AliITSsegmentationSSD *seg2=new AliITSsegmentationSSD(fITSgeom);
836     seg2->SetDetSize(s2->GetDx()*2.*kconv, // base this on AliITSgeomSSD
837                      s2->GetDz()*2.*kconv, // for now.
838                      s2->GetDy()*2.*kconv); // x,z,y full width in microns.
839     seg2->SetPadSize(95.,0.); // strip x pitch in microns
840     seg2->SetNPads(768,0); // number of strips on each side.
841     seg2->SetAngles(0.0075,0.0275); // strip angels rad P and N side.
842     seg2->SetAnglesLay5(0.0075,0.0275); // strip angels rad P and N side.
843     seg2->SetAnglesLay6(0.0275,0.0075); // strip angels rad P and N side.
844     SetSegmentationModel(kSSD,seg2); 
845     const char *kData2=(iDetType->GetResponseModel())->DataType();
846     if(strstr(kData2,"real") ) iDetType->ClassNames("AliITSdigit",
847                                                     "AliITSRawClusterSSD");
848     else iDetType->ClassNames("AliITSdigitSSD","AliITSRawClusterSSD");
849   };
850   
851   if(kNTYPES>3){
852     Warning("SetDefaults",
853             "Only the four basic detector types are initialised!");
854   }// end if
855   return;
856 };
857
858
859
860
861 //______________________________________________________________________
862 void AliITSv11::DrawModule() const{
863
864 }
865
866 //______________________________________________________________________
867 void AliITSv11::StepManager(){
868   //
869   //    Called for every step in the ITS, then calles the AliITShit class
870   // creator with the information to be recoreded about that hit.
871   //
872
873   Int_t         copy, id;
874   TLorentzVector position, momentum;
875   static TLorentzVector position0;
876   static Int_t stat0=0;
877     
878   if(!(this->IsActive())){
879     return;
880   } // end if !Active volume.
881
882   if(!(gMC->TrackCharge())) return;
883   
884   id=gMC->CurrentVolID(copy);
885
886   Bool_t sensvol = kFALSE;
887   for(Int_t kk = 0; kk < fIdN; kk++)
888     if(id == fIdSens[kk]) sensvol = kTRUE;
889
890   if (sensvol && (gMC->IsTrackExiting())) {
891     copy = fTrackReferences->GetEntriesFast();
892     TClonesArray &lTR = *fTrackReferences;
893     // Fill TrackReference structure with this new TrackReference.
894     new(lTR[copy]) AliTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber());
895   } // if Outer ITS mother Volume
896   
897   Int_t   vol[5];
898   TClonesArray &lhits = *fHits;
899   //
900   // Track status
901   vol[3] = 0;
902   vol[4] = 0;
903   // Fill hit structure.
904   if(gMC->IsTrackInside())      vol[3] +=  1;
905   if(gMC->IsTrackEntering())    vol[3] +=  2;
906   if(gMC->IsTrackExiting())     vol[3] +=  4;
907   if(gMC->IsTrackOut())         vol[3] +=  8;
908   if(gMC->IsTrackDisappeared()) vol[3] += 16;
909   if(gMC->IsTrackStop())        vol[3] += 32;
910   if(gMC->IsTrackAlive())       vol[3] += 64;
911
912   // Only entering charged tracks
913   if(!(gMC->TrackCharge())) return;
914  
915   if((id = gMC->CurrentVolID(copy)) == fIdSens[0]) {
916     fSDDgeom->GetCurrentLayLaddDet(vol[0], vol[2], vol[1]);
917     // vol[2], vol[1]) : in this order because the ladder
918     // index and the det. index are exchanged in the constructor
919     // of AliITShit ...                     ???
920
921   } else {
922     return; // not an ITS volume?
923   };
924
925   gMC->TrackPosition(position);
926   gMC->TrackMomentum(momentum);
927   vol[4] = stat0;
928   if(gMC->IsTrackEntering()){
929     position0 = position;
930     stat0 = vol[3];
931     return;
932   } // end if IsEntering
933     // Fill hit structure with this new hit.
934   new(lhits[fNhits++]) AliITShit(fIshunt,gAlice->GetMCApp()->GetCurrentTrackNumber(),
935                                  vol, gMC->Edep(),gMC->TrackTime(),position,
936                                  position0,momentum);
937   //
938   position0 = position;
939   stat0 = vol[3];
940  
941   return;
942 };