Updated START code from Alla
[u/mrichter/AliRoot.git] / START / AliSTARTv1.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 /////////////////////////////////////////////////////////////////////
18 //                                                                 //
19 // START ( T-zero) detector  version 1                             //
20 //
21 //Begin Html       
22 /*
23 <img src="gif/AliSTARTv1Class.gif">
24 */
25 //End Html
26 //                                                                  //
27 //                                                                  //
28 //////////////////////////////////////////////////////////////////////
29
30 #include <TMath.h>
31 #include <TGeometry.h>
32 #include <TTUBE.h>
33 #include <TNode.h>
34 #include <TLorentzVector.h>
35
36 #include "AliSTARTv1.h"
37 #include "AliRun.h"
38 #include "AliMC.h"
39 #include "AliMagF.h"
40 #include "AliSTARThit.h"
41
42 #include <iostream.h>
43 #include <fstream.h>
44
45 //#include "TGeant3.h"
46 #include <stdlib.h>
47
48 ClassImp(AliSTARTv1)
49
50 //--------------------------------------------------------------------
51 AliSTARTv1::AliSTARTv1(const char *name, const char *title):
52  AliSTART(name,title)
53 {
54   //
55   // Standart constructor for START Detector version 0
56   //
57   fIdSens1=0;
58 //  setBufferSize(128000);
59 }
60 //-------------------------------------------------------------------------
61 void AliSTARTv1::CreateGeometry()
62 {
63   //
64   // Create the geometry of START Detector version 0
65   //
66   // begin Html
67   /*
68    <img src="gif/AliSTARTv0.gif">
69   */
70   //
71
72
73   Int_t *idtmed = fIdtmed->GetArray();
74   
75   Int_t is;
76   Int_t idrotm[999];
77   Float_t x,y,z;
78
79   Float_t pstart[3]={4.5,10.7,5.3};
80   Float_t pinstart[3]={0.,1.3,5.25};
81   Float_t ppmt[3]={0.,1.3,3.5};
82   Float_t pdivider[3]={0.,1.2,1.75};
83   Float_t pdiv2[3]={0.,1.2,1.25};
84   Float_t pdiv1[3]={0.6,1.2,0.5};
85   Float_t ptop[3]={0.,1.3,1.5};
86   Float_t pbot[3]={0.6,1.2,0.1};
87   Float_t pglass[3]={1.2,1.3,2.};
88   Float_t pcer[3]={0.9,1.1,0.09};
89   Float_t psteel[3]={0.9,1.1,0.01};
90   Float_t ppins[3]={0.6,1.2,0.014};
91   Float_t phole[3]={0.6,1.2,0.015};
92   Float_t pknob[3]={0.5,0.6,0.4};
93   Float_t pknob_vac[3]={0.,0.5,0.4};
94   Float_t pknob_bot[3]={0.,0.6,0.05};
95   Float_t pribber[3] = {0.,1.2,2.413/2.};
96   Float_t presist[3] = {0.,1.2,0.087/2.};
97
98   Float_t zdet=75.;
99  //-------------------------------------------------------------------
100  //  START volume 
101  //-------------------------------------------------------------------
102   
103   //  Float_t theta=TMath::ATan(6.5/zdet);
104   Float_t theta=(180./3.1415)*TMath::ATan(6.5/zdet);
105     AliMatrix(idrotm[901], 90., 0., 90., 90., 180., 0.);
106     
107     gMC->Gsvolu("STRT","TUBE",idtmed[1],pstart,3);
108     gMC->Gspos("STRT",1,"ALIC",0.,0.,zdet,0,"ONLY");
109     gMC->Gspos("STRT",2,"ALIC",0.,0.,-zdet,idrotm[901],"ONLY");
110
111 //START interior
112     gMC->Gsvolu("INST","TUBE",idtmed[1],pinstart,3);
113     gMC->Gsvolu("PMT ","TUBE",idtmed[3],ppmt,3);     
114     gMC->Gsvolu("DIVI","TUBE",idtmed[3],pdivider,3);     
115
116 // first ring: 12 units of Scintillator+PMT+divider
117     Double_t dang1 = 2*TMath::Pi()/12;
118     for (is=1; is<=12; is++)
119       {  
120         AliMatrix(idrotm[901+is], 
121                   90.-theta, 30.*is, 
122                   90.,       90.+30.*is,
123                   theta,    180.+30.*is); 
124         x=6.5*TMath::Sin(is*dang1);
125         y=6.5*TMath::Cos(is*dang1);
126         z=-pstart[2]+pinstart[2];
127         gMC->Gspos("INST",is,"STRT",x,y,z,idrotm[901+is],"ONLY");
128         printf("z PMT %f\n",z);
129
130         
131         x=0;
132         y=0;
133         z=-pinstart[2]+ppmt[2];
134         printf(" is %d, z Divider %f\n",is,z);
135         gMC->Gspos("PMT ",is,"INST",x,y,z,0,"ONLY");
136         z=pinstart[2]-pdivider[2];
137         gMC->Gspos("DIVI",is,"INST",x,y,z,0,"ONLY");
138       }
139      /*  
140 //second ring: 20 units of Scintillator+PMT+divider
141       Double_t dang2 = 2*TMath::Pi()/26;
142       Double_t dang3 = 2*TMath::Pi()/20;
143        for (is=14; is<=33;is++)  
144      {  
145      x=9.3*TMath::Sin(dang2+(is-13)*dang3);
146      y=9.3*TMath::Cos(dang2+(is-13)*dang3);
147       z=-pstart[2]+ppmt[2];
148       gMC->Gspos("PMT ",is,"STRT",x,y,z,0,"ONLY");
149       z=z+ppmt[2]+pdiv2[2];
150       gMC->Gspos("DIVI",is,"STRT",x,y,z,0,"ONLY");
151       }
152      */
153 // PMT
154       
155     // Entry window (glass)
156     gMC->Gsvolu("PTOP","TUBE",idtmed[6],ptop,3);
157     z=-ppmt[2]+ptop[2];
158     gMC->Gspos("PTOP",1,"PMT ",0,0,z,0,"ONLY");
159     //     printf("Z PTOP %f -ppmt[2] %f ptop[2] %f\n",z,-ppmt[2],ptop[2]);
160     // Bottom glass
161     gMC->Gsvolu("PBOT","TUBE",idtmed[6],pbot,3);
162     z=ppmt[2]-pbot[2];
163     printf("Z bottom %f\n",z);
164     gMC->Gspos("PBOT",1,"PMT ",0,0,z,0,"ONLY");
165     // Side cylinder glass
166     gMC->Gsvolu("POUT","TUBE",idtmed[6],pglass,3);
167     z=ppmt[2]-pglass[2];
168     //      printf("Z glass %f\n",z);
169     gMC->Gspos("POUT",1,"PMT ",0,0,z,0,"ONLY");
170     //PMT electrodes support structure
171     gMC->Gsvolu("PCER","TUBE",idtmed[4],pcer,3);
172     gMC->Gsvolu("PSTE","TUBE",idtmed[8],psteel,3);
173     z=-ppmt[2]+2*ptop[2]+0.3;;
174     //      printf("Z Cer 1 %f\n",z);
175     for (is=1; is<=15; is++)
176       {
177         z=z+psteel[2]+pcer[2];
178         gMC->Gspos("PCER",is,"PMT",0,0,z,0,"ONLY");
179         z=z+psteel[2]+pcer[2];
180         gMC->Gspos("PSTE",is,"PMT",0,0,z,0,"ONLY");
181       }
182     
183     // Divider
184     // Knob at the bottom of PMT baloon
185     
186     gMC->Gsvolu("KNOB","TUBE",idtmed[6],pknob,3);
187     z=-pdivider[2]+pknob[2];
188     //      printf("zknob %f\n",z);
189     gMC->Gspos("KNOB",1,"DIVI",0,0,z,0,"ONLY");
190     gMC->Gsvolu("KNBO","TUBE",idtmed[6],pknob_bot,3);
191     z=-pdivider[2]+2*pknob[2]+pknob_bot[2];
192     //      printf("knobbot %f\n",z);
193     gMC->Gspos("KNBO",1,"DIVI ",0,0,z,0,"ONLY");
194     gMC->Gsvolu("KNVA","TUBE",idtmed[3],pknob_vac,3);
195     z=-pdivider[2]+pknob_vac[2];
196     //      printf("knobvac %f\n",z);
197     gMC->Gspos("KNVA",1,"DIVI",0,0,z,0,"ONLY");
198     //Steel pins + pin holes
199     gMC->Gsvolu("PINS","TUBE",idtmed[8],ppins,3);
200     z=-pdivider[2]+ppins[2];
201     gMC->Gspos("PINS",1,"DIVI",0,0,z,0,"ONLY");
202     gMC->Gsvolu("HOLE","TUBE",idtmed[11],phole,3);
203     z=-pdivider[2]+2*ppins[2]+phole[2];
204     gMC->Gspos("HOLE",1,"DIVI",0,0,z,0,"ONLY");
205     
206     //Socket
207     gMC->Gsvolu("DIV1","TUBE",idtmed[4],pdiv1,3);
208     z=-pdivider[2]+pdiv1[2];
209     gMC->Gspos("DIV1",1,"DIVI",0,0,z,0,"ONLY");
210     //Resistors
211     gMC->Gsvolu("DIV2","TUBE",idtmed[1],pdiv2,3);
212     z=pdivider[2]-pdiv2[2];
213     gMC->Gspos("DIV2",1,"DIVI",0,0,z,0,"ONLY");
214     gMC->Gsvolu("DRES","TUBE",idtmed[4],presist,3);
215     z=-pdiv2[2]+presist[2];
216     gMC->Gspos("DRES",1,"DIV2",0,0,z,0,"ONLY");
217     gMC->Gsvolu("DRIB","TUBE",idtmed[9],pribber,3);
218     z=pdiv2[2]-pribber[2];
219     gMC->Gspos("DRIB",1,"DIV2",0,0,z,0,"ONLY");
220     //      printf("z DRIB %f\n",z);
221     
222     
223 }    
224 //------------------------------------------------------------------------
225 void AliSTARTv1::CreateMaterials()
226 {
227    Int_t isxfld   = gAlice->Field()->Integ();
228    Float_t sxmgmx = gAlice->Field()->Max();
229    Float_t a,z,d,radl,absl,buf[1];
230    Int_t nbuf;
231
232 // Scintillator CH
233    Float_t ascin[2]={1.01,12.01};
234    Float_t zscin[2]={1,6};
235    Float_t wscin[2]={1,1};
236    Float_t denscin=1.03;
237 // PMT glass SiO2
238    Float_t aglass[2]={28.0855,15.9994};
239    Float_t zglass[2]={14.,8.};
240    Float_t wglass[2]={1.,2.};
241    Float_t dglass=2.65;
242 // Ceramic   97.2% Al2O3 , 2.8% SiO2
243    Float_t acer[2],zcer[2],wcer[2]={0.972,0.028};
244    Float_t aal2o3[2]  = { 26.981539,15.9994 };
245    Float_t zal2o3[2]  = { 13.,8. };
246    Float_t wal2o3[2]  = { 2.,3. };
247    Float_t denscer  = 3.6;
248
249 // Brass 80% Cu, 20% Zn
250    Float_t abrass[2] = {63.546,65.39};
251    Float_t zbrass[2] = {29,30};
252    Float_t wbrass[2] = {0.8,0.2};
253    Float_t denbrass=8.96;
254
255 //Ribber C6H12S
256    Float_t aribber[3] = {12.,1.,32.};
257    Float_t zribber[3] = {6.,1.,16.};
258    Float_t wribber[3] = {6.,12.,1.};
259    Float_t denribber=0.8;
260    /*
261 // Definition Cherenkov parameters
262    Float_t ppckov[14] = { 5.63e-9,5.77e-9,5.9e-9,6.05e-9,6.2e-9,6.36e-9,6.52e-9,6.7e-9,6.88e-9,7.08e-9,7.3e-9,7.51e-9,7.74e-9,8e-9 };
263    Float_t rindex_quarz[14] = { 1.528309,1.533333,
264                                 1.538243,1.544223,1.550568,1.55777,
265                                 1.565463,1.574765,1.584831,1.597027,
266                                 1.611858,1.6277,1.6472,1.6724 };
267  
268    Float_t absco_quarz[14] = { 20.126,16.27,13.49,11.728,9.224,8.38,7.44,7.17,
269                                 6.324,4.483,1.6,.323,.073,0. };
270    */
271     
272 //*** Definition Of avaible START materials ***
273    AliMaterial(0, "START Steel$", 55.850,26.,7.87,1.76,999);
274    AliMaterial(1, "START Vacuum$", 1.e-16,1.e-16,1.e-16,1.e16,999);
275    AliMaterial(2, "START Air$", 14.61, 7.3, .001205, 30423.,999); 
276
277    AliMixture( 3, "Al2O3   $", aal2o3, zal2o3, denscer, -2, wal2o3);
278    AliMixture( 4, "PMT glass   $",aglass,zglass,dglass,-2,wglass);
279    char namate[21];
280    gMC->Gfmate((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
281    acer[0]=a;
282    zcer[0]=z;
283    gMC->Gfmate((*fIdmate)[4], namate, a, z, d, radl, absl, buf, nbuf);
284    acer[1]=a;
285    zcer[1]=z;
286    
287    AliMixture( 9, "Ceramic    $", acer, zcer, denscer, 2, wcer);
288    AliMixture( 5, "Scintillator$",ascin,zscin,denscin,-2,wscin);
289    AliMixture( 6, "Brass    $", abrass, zbrass, denbrass, 2, wbrass);
290    
291    AliMixture( 7, "Ribber $",aribber,zribber,denribber,-3,wribber);
292    
293    
294    AliMedium(1, "START Air$", 2, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
295    AliMedium(2, "Scintillator$", 5, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
296    AliMedium(3, "Vacuum$", 1, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
297    AliMedium(4, "Ceramic$", 9, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
298    AliMedium(6, "Glass$", 4, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
299    AliMedium(8, "Steel$", 0, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
300    AliMedium(9, "Ribber  $", 7, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
301    AliMedium(11, "Brass  $", 6, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
302    cout<<"++++++++++++++Medium set++++++++++"<<endl;
303
304 //  geant3->Gsckov(idtmed[2105], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
305
306 }
307 //---------------------------------------------------------------------
308 void AliSTARTv1::DrawDetector()
309 {
310 //
311 // Draw a shaded view of the Forward multiplicity detector version 0
312 //
313   
314   //Set ALIC mother transparent
315   gMC->Gsatt("ALIC","SEEN",0);
316   //
317   //Set volumes visible
318   //  gMC->Gsatt("STRT","SEEN",0);
319   gMC->Gsatt("INST","SEEN",0);
320   gMC->Gsatt("PMT ","SEEN",1);
321   gMC->Gsatt("DIVI","SEEN",1);
322   //
323   gMC->Gdopt("hide","on");
324   gMC->Gdopt("shad","on");
325   gMC->SetClipBox(".");
326   gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
327   gMC->DefaultRange();
328   gMC->Gdraw("alic",40,30,0,12,9.5,.7,0.7);
329   gMC->Gdhead(1111,"T-Zero detector");
330   gMC->Gdopt("hide","off");
331 }
332
333 //-------------------------------------------------------------------
334 void AliSTARTv1::Init()
335 {
336 // Initialises version 0 of the Forward Multiplicity Detector
337 //
338 //Int_t *idtmed  = gAlice->Idtmed();
339   AliSTART::Init();
340   fIdSens1=gMC->VolId("PTOP");
341   printf("*** START version 0 initialized ***\n");
342  
343 }
344
345 //-------------------------------------------------------------------
346
347 void AliSTARTv1::StepManager()
348 {
349   //
350   // Called for every step in the START Detector
351   //
352   Int_t id,copy,copy1;
353   static Float_t hits[7];
354   static Float_t edep;
355   static Int_t vol[2];
356   TLorentzVector pos;
357   
358   TClonesArray &lhits = *fHits;
359   
360   if(!gMC->IsTrackAlive()) return; // particle has disappeared
361   Float_t charge = gMC->TrackCharge();
362   if(TMath::Abs(charge)<=0.) return; //take only charged particles
363   id=gMC->CurrentVolID(copy);
364   
365   
366   //  printf("gMC->ckine->ipart %d",gMC->ckine->ipart);
367   // Check the sensetive volume
368   if(id==fIdSens1 ) {
369     if(gMC->IsTrackEntering()) {
370       gMC->CurrentVolOffID(2,copy);
371       vol[0]=copy;
372       gMC->CurrentVolOffID(1,copy1);
373       vol[1]=copy1;
374       gMC->TrackPosition(pos);
375       hits[0] = pos[0];
376       hits[1] = pos[1];
377       hits[2] = pos[2];
378       Float_t etot=gMC->Etot();
379       hits[4]=etot;
380       Int_t iPart= gMC->TrackPid();
381       Int_t partID=gMC->IdFromPDG(iPart);
382       hits[5]=partID;
383       Float_t ttime=gMC->TrackTime();
384       hits[6]=ttime*1e9;
385       edep=0;
386     }
387     if(gMC->IsTrackInside())    {
388       Float_t de=gMC->Edep(); 
389       edep=edep+de;
390     } 
391   }
392   if(gMC->IsTrackExiting())     {
393     Float_t de=gMC->Edep(); 
394     edep=edep+de;
395     hits[3]=edep*1e3;
396     new(lhits[fNhits++]) AliSTARThit(fIshunt,gAlice->CurrentTrack(),vol,hits);      
397   }
398 //---------------------------------------------------------------------
399 }
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