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[u/mrichter/AliRoot.git] / START / AliSTARTv0.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 $Log$
18 Revision 1.6  1999/11/12 15:04:00  fca
19 Modifications from A.Maevskaya
20
21 Revision 1.5  1999/09/29 09:24:29  fca
22 Introduction of the Copyright and cvs Log
23
24 */ 
25
26 /////////////////////////////////////////////////////////////////////
27 //                                                                 //
28 // START ( T-zero) detector  version 0                        //
29 //
30 //Begin Html       
31 /*
32 <img src="gif/AliSTARTv0Class.gif">
33 */
34 //End Html
35 //                                                                  //
36 //                                                                  //
37 //////////////////////////////////////////////////////////////////////
38
39 #include <TMath.h>
40 #include <TGeometry.h>
41 #include <TTUBE.h>
42 #include <TNode.h>
43
44 #include "AliSTARTv0.h"
45 #include "AliRun.h"
46 #include "AliMC.h"
47 #include "AliSTARThit.h"
48
49 #include <iostream.h>
50 #include <fstream.h>
51
52 //#include "TGeant3.h"
53 #include <stdlib.h>
54
55 ClassImp(AliSTARTv0)
56
57 //--------------------------------------------------------------------
58 AliSTARTv0::AliSTARTv0(const char *name, const char *title):
59  AliSTART(name,title)
60 {
61   //
62   // Standart constructor for START Detector version 0
63   //
64   fIdSens1=0;
65 //  setBufferSize(128000);
66 }
67 //-------------------------------------------------------------------------
68 void AliSTARTv0::CreateGeometry()
69 {
70   //
71   // Create the geometry of START Detector version 0
72   //
73   // begin Html
74   /*
75    <img src="gif/AliSTARTv0.gif">
76   */
77   //
78
79
80   Int_t *idtmed = fIdtmed->GetArray();
81   
82   Int_t is;
83   Int_t idrotm[999];
84   Float_t x,y,z;
85
86   Float_t pstart[3]={4.5,10.7,5.3};
87   Float_t ppmt[3]={0.,1.3,3.5};
88   Float_t pdivider[3]={0.,1.2,1.75};
89   Float_t pdiv2[3]={0.,1.2,1.25};
90   Float_t pdiv1[3]={0.6,1.2,0.5};
91   Float_t ptop[3]={0.,1.3,1.5};
92   Float_t pbot[3]={0.6,1.2,0.1};
93   Float_t pglass[3]={1.2,1.3,2.};
94   Float_t pcer[3]={0.9,1.1,0.09};
95   Float_t psteel[3]={0.9,1.1,0.01};
96   Float_t ppins[3]={0.6,1.2,0.014};
97   Float_t phole[3]={0.6,1.2,0.015};
98   Float_t pknob[3]={0.5,0.6,0.4};
99   Float_t pknob_vac[3]={0.,0.5,0.4};
100   Float_t pknob_bot[3]={0.,0.6,0.05};
101   Float_t pribber[3] = {0.,1.2,2.413/2.};
102   Float_t presist[3] = {0.,1.2,0.087/2.};
103
104   Float_t zdet=75.;
105  //-------------------------------------------------------------------
106  //  START volume 
107  //-------------------------------------------------------------------
108   
109     AliMatrix(idrotm[901], 90., 0., 90., 90., 180., 0.);
110     gMC->Gsvolu("STRT","TUBE",idtmed[1],pstart,3);
111     gMC->Gspos("STRT",1,"ALIC",0.,0.,zdet,0,"ONLY");
112     gMC->Gspos("STRT",2,"ALIC",0.,0.,-zdet,idrotm[901],"ONLY");
113
114 //START interior
115     gMC->Gsvolu("PMT ","TUBE",idtmed[3],ppmt,3);     
116     gMC->Gsvolu("DIVI","TUBE",idtmed[3],pdivider,3);     
117
118 // first ring: 13 units of Scintillator+PMT+divider
119     Double_t dang1 = 2*TMath::Pi()/12;
120     for (is=1; is<=12; is++)
121       {  
122         x=6.5*TMath::Sin(is*dang1);
123         y=6.5*TMath::Cos(is*dang1);
124         z=-pstart[2]+ppmt[2];
125         gMC->Gspos("PMT ",is,"STRT",x,y,z,0,"ONLY");
126         printf("z PMT %f\n",z);
127         z=z+ppmt[2]+pdiv2[2];
128         printf(" is %d, z Divider %f\n",is,z);
129         gMC->Gspos("DIVI",is,"STRT",x,y,z,0,"ONLY");
130       }
131      /*  
132 //second ring: 20 units of Scintillator+PMT+divider
133       Double_t dang2 = 2*TMath::Pi()/26;
134       Double_t dang3 = 2*TMath::Pi()/20;
135        for (is=14; is<=33;is++)  
136      {  
137      x=9.3*TMath::Sin(dang2+(is-13)*dang3);
138      y=9.3*TMath::Cos(dang2+(is-13)*dang3);
139       z=-pstart[2]+ppmt[2];
140       gMC->Gspos("PMT ",is,"STRT",x,y,z,0,"ONLY");
141       z=z+ppmt[2]+pdiv2[2];
142       gMC->Gspos("DIVI",is,"STRT",x,y,z,0,"ONLY");
143       }
144      */
145 // PMT
146       
147     // Entry window (glass)
148     gMC->Gsvolu("PTOP","TUBE",idtmed[6],ptop,3);
149     z=-ppmt[2]+ptop[2];
150     gMC->Gspos("PTOP",1,"PMT ",0,0,z,0,"ONLY");
151     //     printf("Z PTOP %f -ppmt[2] %f ptop[2] %f\n",z,-ppmt[2],ptop[2]);
152     // Bottom glass
153     gMC->Gsvolu("PBOT","TUBE",idtmed[6],pbot,3);
154     z=ppmt[2]-pbot[2];
155     printf("Z bottom %f\n",z);
156     gMC->Gspos("PBOT",1,"PMT ",0,0,z,0,"ONLY");
157     // Side cylinder glass
158     gMC->Gsvolu("POUT","TUBE",idtmed[6],pglass,3);
159     z=ppmt[2]-pglass[2];
160     //      printf("Z glass %f\n",z);
161     gMC->Gspos("POUT",1,"PMT ",0,0,z,0,"ONLY");
162     //PMT electrodes support structure
163     gMC->Gsvolu("PCER","TUBE",idtmed[4],pcer,3);
164     gMC->Gsvolu("PSTE","TUBE",idtmed[8],psteel,3);
165     z=-ppmt[2]+2*ptop[2]+0.3;;
166     //      printf("Z Cer 1 %f\n",z);
167     for (is=1; is<=15; is++)
168       {
169         z=z+psteel[2]+pcer[2];
170         gMC->Gspos("PCER",is,"PMT",0,0,z,0,"ONLY");
171         z=z+psteel[2]+pcer[2];
172         gMC->Gspos("PSTE",is,"PMT",0,0,z,0,"ONLY");
173       }
174     
175     // Divider
176     // Knob at the bottom of PMT baloon
177     
178     gMC->Gsvolu("KNOB","TUBE",idtmed[6],pknob,3);
179     z=-pdivider[2]+pknob[2];
180     //      printf("zknob %f\n",z);
181     gMC->Gspos("KNOB",1,"DIVI",0,0,z,0,"ONLY");
182     gMC->Gsvolu("KNBO","TUBE",idtmed[6],pknob_bot,3);
183     z=-pdivider[2]+2*pknob[2]+pknob_bot[2];
184     //      printf("knobbot %f\n",z);
185     gMC->Gspos("KNBO",1,"DIVI ",0,0,z,0,"ONLY");
186     gMC->Gsvolu("KNVA","TUBE",idtmed[6],pknob_vac,3);
187     z=-pdivider[2]+pknob_vac[2];
188     //      printf("knobvac %f\n",z);
189     gMC->Gspos("KNVA",1,"DIVI",0,0,z,0,"ONLY");
190     //Steel pins + pin holes
191     gMC->Gsvolu("PINS","TUBE",idtmed[8],ppins,3);
192     z=-pdivider[2]+ppins[2];
193     gMC->Gspos("PINS",1,"DIVI",0,0,z,0,"ONLY");
194     gMC->Gsvolu("HOLE","TUBE",idtmed[11],phole,3);
195     z=-pdivider[2]+2*ppins[2]+phole[2];
196     gMC->Gspos("HOLE",1,"DIVI",0,0,z,0,"ONLY");
197     
198     //Socket
199     gMC->Gsvolu("DIV1","TUBE",idtmed[4],pdiv1,3);
200     z=-pdivider[2]+pdiv1[2];
201     gMC->Gspos("DIV1",1,"DIVI",0,0,z,0,"ONLY");
202     //Resistors
203     gMC->Gsvolu("DIV2","TUBE",idtmed[1],pdiv2,3);
204     z=pdivider[2]-pdiv2[2];
205     gMC->Gspos("DIV2",1,"DIVI",0,0,z,0,"ONLY");
206     gMC->Gsvolu("DRES","TUBE",idtmed[4],presist,3);
207     z=-pdiv2[2]+presist[2];
208     gMC->Gspos("DRES",1,"DIV2",0,0,z,0,"ONLY");
209     gMC->Gsvolu("DRIB","TUBE",idtmed[9],pribber,3);
210     z=pdiv2[2]-pribber[2];
211     gMC->Gspos("DRIB",1,"DIV2",0,0,z,0,"ONLY");
212     //      printf("z DRIB %f\n",z);
213     
214     
215 }    
216 //------------------------------------------------------------------------
217 void AliSTARTv0::CreateMaterials()
218 {
219    Int_t ISXFLD   = gAlice->Field()->Integ();
220    Float_t SXMGMX = gAlice->Field()->Max();
221    Float_t a,z,d,radl,absl,buf[1];
222    Int_t nbuf;
223
224 // Scintillator CH
225    Float_t ascin[2]={1.01,12.01};
226    Float_t zscin[2]={1,6};
227    Float_t wscin[2]={1,1};
228    Float_t denscin=1.03;
229 // PMT glass SiO2
230    Float_t aglass[2]={28.0855,15.9994};
231    Float_t zglass[2]={14.,8.};
232    Float_t wglass[2]={1.,2.};
233    Float_t dglass=2.65;
234 // Ceramic   97.2% Al2O3 , 2.8% SiO2
235    Float_t acer[2],zcer[2],wcer[2]={0.972,0.028};
236    Float_t aal2o3[2]  = { 26.981539,15.9994 };
237    Float_t zal2o3[2]  = { 13.,8. };
238    Float_t wal2o3[2]  = { 2.,3. };
239    Float_t denscer  = 3.6;
240
241 // Brass 80% Cu, 20% Zn
242    Float_t abrass[2] = {63.546,65.39};
243    Float_t zbrass[2] = {29,30};
244    Float_t wbrass[2] = {0.8,0.2};
245    Float_t denbrass=8.96;
246
247 //Ribber C6H12S
248    Float_t aribber[3] = {12.,1.,32.};
249    Float_t zribber[3] = {6.,1.,16.};
250    Float_t wribber[3] = {6.,12.,1.};
251    Float_t denribber=0.8;
252    /*
253 // Definition Cherenkov parameters
254    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 };
255    Float_t rindex_quarz[14] = { 1.528309,1.533333,
256                                 1.538243,1.544223,1.550568,1.55777,
257                                 1.565463,1.574765,1.584831,1.597027,
258                                 1.611858,1.6277,1.6472,1.6724 };
259  
260    Float_t absco_quarz[14] = { 20.126,16.27,13.49,11.728,9.224,8.38,7.44,7.17,
261                                 6.324,4.483,1.6,.323,.073,0. };
262    */
263    //   Int_t *idtmed = fIdtmed->GetArray()-999;
264     
265    //  TGeant3 *geant3 = (TGeant3*) gMC;
266     
267 //*** Definition Of avaible START materials ***
268    AliMaterial(0, "START Steel$", 55.850,26.,7.87,1.76,999);
269    AliMaterial(1, "START Vacuum$", 1.e-16,1.e-16,1.e-16,1.e16,999);
270    AliMaterial(2, "START Air$", 14.61, 7.3, .001205, 30423.,999); 
271
272    AliMixture( 3, "Al2O3   $", aal2o3, zal2o3, denscer, -2, wal2o3);
273    AliMixture( 4, "PMT glass   $",aglass,zglass,dglass,-2,wglass);
274    char namate[21];
275    gMC->Gfmate((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
276    acer[0]=a;
277    zcer[0]=z;
278    gMC->Gfmate((*fIdmate)[4], namate, a, z, d, radl, absl, buf, nbuf);
279    acer[1]=a;
280    zcer[1]=z;
281    
282    AliMixture( 9, "Ceramic    $", acer, zcer, denscer, 2, wcer);
283    AliMixture( 5, "Scintillator$",ascin,zscin,denscin,-2,wscin);
284    AliMixture( 6, "Brass    $", abrass, zbrass, denbrass, 2, wbrass);
285    
286    AliMixture( 7, "Ribber $",aribber,zribber,denribber,-3,wribber);
287    
288    
289    AliMedium(1, "START Air$", 2, 0, ISXFLD, SXMGMX, 10., .1, 1., .003, .003);
290    AliMedium(2, "Scintillator$", 5, 1, ISXFLD, SXMGMX, 10., .01, 1., .003, .003);
291    AliMedium(3, "Vacuum$", 1, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
292    AliMedium(4, "Ceramic$", 9, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
293    AliMedium(6, "Glass$", 4, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
294    AliMedium(8, "Steel$", 0, 0, ISXFLD, SXMGMX, 1., .001, 1., .001, .001);
295    AliMedium(11, "Brass  $", 6, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
296    AliMedium(9, "Ribber  $", 7, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
297
298 //  geant3->Gsckov(idtmed[2105], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
299
300 }
301 //---------------------------------------------------------------------
302 void AliSTARTv0::DrawModule()
303 {
304 //
305 // Draw a shaded view of the Forward multiplicity detector version 0
306 //
307   
308   //Set ALIC mother transparent
309   gMC->Gsatt("ALIC","SEEN",0);
310   //
311   //Set volumes visible
312   gMC->Gsatt("STRT","SEEN",0);
313   gMC->Gsatt("PMT ","SEEN",1);
314   gMC->Gsatt("DIVI","SEEN",1);
315   //
316   gMC->Gdopt("hide","on");
317   gMC->Gdopt("shad","on");
318   gMC->SetClipBox(".");
319   gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
320   gMC->DefaultRange();
321   gMC->Gdraw("alic",40,30,0,12,9.5,.7,0.7);
322   gMC->Gdhead(1111,"T-Zero detector");
323   gMC->Gdopt("hide","off");
324 }
325
326 //-------------------------------------------------------------------
327 void AliSTARTv0::Init()
328 {
329 // Initialises version 0 of the Forward Multiplicity Detector
330 //
331 //Int_t *idtmed  = gAlice->Idtmed();
332   AliSTART::Init();
333   fIdSens1=gMC->VolId("PTOP");
334   printf("*** START version 0 initialized ***\n");
335  
336 }
337
338 //-------------------------------------------------------------------
339
340 void AliSTARTv0::StepManager()
341 {
342   //
343   // Called for every step in the START Detector
344   //
345   Int_t id,copy,copy1;
346   static Float_t hits[7];
347   static Float_t edep;
348   static Int_t vol[2];
349   TLorentzVector pos;
350   
351   TClonesArray &lhits = *fHits;
352   
353   if(!gMC->IsTrackAlive()) return; // particle has disappeared
354   Float_t charge = gMC->TrackCharge();
355   if(TMath::Abs(charge)<=0.) return; //take only charged particles
356   //    gMC->Gpcxyz();
357   id=gMC->CurrentVolID(copy);
358   
359   
360   //  printf("gMC->ckine->ipart %d",gMC->ckine->ipart);
361   // Check the sensetive volume
362   if(id==fIdSens1 ) {
363     if(gMC->IsTrackEntering()) {
364       gMC->CurrentVolOffID(2,copy);
365       vol[0]=copy;
366       gMC->CurrentVolOffID(1,copy1);
367       vol[1]=copy1;
368       gMC->TrackPosition(pos);
369       hits[0] = pos[0];
370       hits[1] = pos[1];
371       hits[2] = pos[2];
372       Float_t etot=gMC->Etot();
373       hits[4]=etot;
374       Int_t part= gMC->TrackPid();
375       hits[5]=part;
376       Float_t ttime=gMC->TrackTime();
377       hits[6]=ttime*1e9;
378       edep=0;
379     }
380     if(gMC->IsTrackInside())    {
381       Float_t de=gMC->Edep(); 
382       edep=edep+de;
383       //       printf ("E deposition %f\n",edep);
384       //    for (i=0; i<=6; i++){
385       //    printf(" HITS on START inside %f\n",hits[i]); } 
386     }
387     if(gMC->IsTrackExiting())   {
388       Float_t de=gMC->Edep(); 
389       edep=edep+de;
390       hits[3]=edep*1e3;
391
392       //       for (i=0; i<=6; i++){
393       //         printf(" HITS on START Exit %f\n",hits[i]); } 
394       //for (i=0; i<=1; i++) { printf("START vol %d\n",vol[i]);}
395      
396       new(lhits[fNhits++]) AliSTARThit(fIshunt,gAlice->CurrentTrack(),vol,hits);      
397     }
398   }
399 //---------------------------------------------------------------------
400 }
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