Asimmetric START geometry
[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 1.12  2001/04/25 14:09:34  alla
19 Curent bur fixed
20
21 Revision 1.11  2001/04/04 12:10:18  alla
22 changes according Coding Convension
23
24 Revision 1.10  2000/12/04 08:48:19  alibrary
25 Fixing problems in the HEAD
26
27 Revision 1.9  2000/10/02 21:28:13  fca
28 Removal of useless dependecies via forward declarations
29
30 Revision 1.8  2000/07/13 16:41:29  fca
31 New START corrected for coding conventions
32
33 Revision 1.7  2000/01/21 15:45:23  fca
34 New Version from Alla
35
36 Revision 1.6  1999/11/12 15:04:00  fca
37 Modifications from A.Maevskaya
38
39 Revision 1.5  1999/09/29 09:24:29  fca
40 Introduction of the Copyright and cvs Log
41
42 */ 
43
44 /////////////////////////////////////////////////////////////////////
45 //                                                                 //
46 // START ( T-zero) detector  version 0                        //
47 //
48 //Begin Html       
49 /*
50 <img src="gif/AliSTARTv0Class.gif">
51 */
52 //End Html
53 //                                                                  //
54 //                                                                  //
55 //////////////////////////////////////////////////////////////////////
56
57 #include <TMath.h>
58 #include <TGeometry.h>
59 #include <TTUBE.h>
60 #include <TNode.h>
61 #include <TLorentzVector.h>
62
63 #include "AliSTARTv0.h"
64 #include "AliRun.h"
65 #include "AliMC.h"
66 #include "AliMagF.h"
67 #include "AliSTARThit.h"
68
69 #include <iostream.h>
70 #include <fstream.h>
71
72 //#include "TGeant3.h"
73 #include <stdlib.h>
74
75 ClassImp(AliSTARTv0)
76
77 //--------------------------------------------------------------------
78 AliSTARTv0::AliSTARTv0(const char *name, const char *title):
79  AliSTART(name,title)
80 {
81   //
82   // Standart constructor for START Detector version 0
83   //
84   fIdSens1=0;
85 //  setBufferSize(128000);
86 }
87 //-------------------------------------------------------------------------
88 void AliSTARTv0::CreateGeometry()
89 {
90   //
91   // Create the geometry of START Detector version 0
92   //
93   // begin Html
94   /*
95    <img src="gif/AliSTARTv0.gif">
96   */
97   //
98
99
100   Int_t *idtmed = fIdtmed->GetArray();
101
102   Int_t is;
103   Int_t idrotm[999];
104   Float_t x,y,z;
105
106   Float_t pstart[3]={4.5,10.7,5.3};
107   Float_t pinstart[3]={0.,1.3,5.25};
108   Float_t ppmt[3]={0.,1.3,3.5};
109   Float_t pdivider[3]={0.,1.2,1.75};
110   Float_t pdiv2[3]={0.,1.2,1.25};
111   Float_t pdiv1[3]={0.6,1.2,0.5};
112   Float_t ptop[3]={0.,1.3,1.5};
113   Float_t pbot[3]={0.6,1.2,0.1};
114   Float_t pglass[3]={1.2,1.3,2.};
115   Float_t pcer[3]={0.9,1.1,0.09};
116   Float_t psteel[3]={0.9,1.1,0.01};
117   Float_t ppins[3]={0.6,1.2,0.014};
118   Float_t phole[3]={0.6,1.2,0.015};
119   Float_t pknob[3]={0.5,0.6,0.4};
120   Float_t pknob_vac[3]={0.,0.5,0.4};
121   Float_t pknob_bot[3]={0.,0.6,0.05};
122   Float_t pribber[3] = {0.,1.2,2.413/2.};
123   Float_t presist[3] = {0.,1.2,0.087/2.};
124
125   Float_t zdetRight=69.7,zdetLeft=350;
126  //-------------------------------------------------------------------
127  //  START volume 
128  //-------------------------------------------------------------------
129   
130   //  Float_t theta=TMath::ATan(6.5/zdet);
131   Float_t thetaRight=(180./3.1415)*TMath::ATan(6.5/zdetRight);
132   Float_t thetaLeft=(180./3.1415)*TMath::ATan(6.5/zdetLeft);
133     AliMatrix(idrotm[901], 90., 0., 90., 90., 180., 0.);
134     
135     gMC->Gsvolu("0STR","TUBE",idtmed[1],pstart,3);
136     gMC->Gsvolu("0STL","TUBE",idtmed[1],pstart,3);
137     gMC->Gspos("0STR",1,"ALIC",0.,0.,zdetRight+pstart[2],0,"ONLY");
138     gMC->Gspos("0STL",1,"ALIC",0.,0.,-zdetLeft-pstart[2],idrotm[901],"ONLY");
139
140 //START interior
141     gMC->Gsvolu("0INS","TUBE",idtmed[1],pinstart,3);
142     gMC->Gsvolu("0PMT","TUBE",idtmed[3],ppmt,3);     
143     gMC->Gsvolu("0DIV","TUBE",idtmed[3],pdivider,3);     
144
145 // first ring: 12 units of Scintillator+PMT+divider
146     Double_t dang1 = 2*TMath::Pi()/12;
147     for (is=1; is<=12; is++)
148       {  
149         AliMatrix(idrotm[901+is], 
150                   90.-thetaRight, 30.*is, 
151                   90.,       90.+30.*is,
152                   thetaRight,    180.+30.*is); 
153         x=6.5*TMath::Sin(is*dang1);
154         y=6.5*TMath::Cos(is*dang1);
155         z=-pstart[2]+pinstart[2];
156         gMC->Gspos("0INS",is,"0STR",x,y,z,idrotm[901+is],"ONLY");
157
158       } 
159     for (is=1; is<=12; is++)
160       {
161         AliMatrix(idrotm[901+is],
162                   90.-thetaLeft, 30.*is,
163                   90.,       90.+30.*is,
164                   thetaLeft,    180.+30.*is);
165
166         x=6.5*TMath::Sin(is*dang1);
167         y=6.5*TMath::Cos(is*dang1);
168         z=-pstart[2]+pinstart[2];
169         gMC->Gspos("0INS",is,"0STL",x,y,z,idrotm[901+is],"ONLY");
170
171       }
172      x=0;
173     y=0;
174     z=-pinstart[2]+ppmt[2];
175     if(fDebug) printf("%s: is %d, z Divider %f\n",ClassName(),is,z);
176     gMC->Gspos("0PMT",1,"0INS",x,y,z,0,"ONLY");
177     z=pinstart[2]-pdivider[2];
178     gMC->Gspos("0DIV",1,"0INS",x,y,z,0,"ONLY");
179       
180      /*  
181 //second ring: 20 units of Scintillator+PMT+divider
182       Double_t dang2 = 2*TMath::Pi()/26;
183       Double_t dang3 = 2*TMath::Pi()/20;
184        for (is=14; is<=33;is++)  
185      {  
186      x=9.3*TMath::Sin(dang2+(is-13)*dang3);
187      y=9.3*TMath::Cos(dang2+(is-13)*dang3);
188       z=-pstart[2]+ppmt[2];
189       gMC->Gspos("0PMT",is,"0STA",x,y,z,0,"ONLY");
190       z=z+ppmt[2]+pdiv2[2];
191       gMC->Gspos("0DIV",is,"0STA",x,y,z,0,"ONLY");
192       }
193      */
194 // PMT
195       
196     // Entry window (glass)
197     // gMC->Gsvolu("0TOP","TUBE",idtmed[6],ptop,3);
198        gMC->Gsvolu("0TOP","TUBE",idtmed[12],ptop,3); //lucite
199      z=-ppmt[2]+ptop[2];
200     gMC->Gspos("0TOP",1,"0PMT",0,0,z,0,"ONLY");
201     //     printf("Z PTOP %f -ppmt[2] %f ptop[2] %f\n",z,-ppmt[2],ptop[2]);
202     
203     // Bottom glass
204     gMC->Gsvolu("0BOT","TUBE",idtmed[6],pbot,3);
205     z=ppmt[2]-pbot[2];
206     if(fDebug) printf("%s: Z bottom %f\n",ClassName(),z);
207     gMC->Gspos("0BOT",1,"0PMT",0,0,z,0,"ONLY");
208     // Side cylinder glass
209     gMC->Gsvolu("0OUT","TUBE",idtmed[6],pglass,3);
210     z=ppmt[2]-pglass[2];
211     //      printf("Z glass %f\n",z);
212     gMC->Gspos("0OUT",1,"0PMT",0,0,z,0,"ONLY");
213     //PMT electrodes support structure
214     gMC->Gsvolu("0CER","TUBE",idtmed[4],pcer,3);
215     gMC->Gsvolu("0STE","TUBE",idtmed[8],psteel,3);
216     z=-ppmt[2]+2*ptop[2]+0.3;;
217     //      printf("Z Cer 1 %f\n",z);
218     for (is=1; is<=15; is++)
219       {
220         z=z+psteel[2]+pcer[2];
221         gMC->Gspos("0CER",is,"0PMT",0,0,z,0,"ONLY");
222         z=z+psteel[2]+pcer[2];
223         gMC->Gspos("0STE",is,"0PMT",0,0,z,0,"ONLY");
224       }
225     
226     // Divider
227     // Knob at the bottom of PMT baloon
228     
229     gMC->Gsvolu("0NB","TUBE",idtmed[6],pknob,3);
230     z=-pdivider[2]+pknob[2];
231     //      printf("zknob %f\n",z);
232     gMC->Gspos("0NB",1,"0DIV",0,0,z,0,"ONLY");
233     gMC->Gsvolu("0KB","TUBE",idtmed[6],pknob_bot,3);
234     z=-pdivider[2]+2*pknob[2]+pknob_bot[2];
235     //      printf(knobbot %f\n",z);
236     gMC->Gspos("0KB",1,"0DIV ",0,0,z,0,"ONLY");
237     gMC->Gsvolu("0VAC","TUBE",idtmed[3],pknob_vac,3);
238     z=-pdivider[2]+pknob_vac[2];
239     //      printf("knobvac %f\n",z);
240     gMC->Gspos("0VAC",1,"0DIV",0,0,z,0,"ONLY");
241     //Steel pins + pin holes
242     gMC->Gsvolu("0PIN","TUBE",idtmed[8],ppins,3);
243     z=-pdivider[2]+ppins[2];
244     gMC->Gspos("0PIN",1,"0DIV",0,0,z,0,"ONLY");
245     gMC->Gsvolu("0HOL","TUBE",idtmed[11],phole,3);
246     z=-pdivider[2]+2*ppins[2]+phole[2];
247     gMC->Gspos("0HOL",1,"0DIV",0,0,z,0,"ONLY");
248     
249     //Socket
250     gMC->Gsvolu("0V1","TUBE",idtmed[4],pdiv1,3);
251     z=-pdivider[2]+pdiv1[2];
252     gMC->Gspos("0V1",1,"0DIV",0,0,z,0,"ONLY");
253     //Resistors
254     gMC->Gsvolu("0V2","TUBE",idtmed[1],pdiv2,3);
255     z=pdivider[2]-pdiv2[2];
256     gMC->Gspos("0V2",1,"0DIV",0,0,z,0,"ONLY");
257     gMC->Gsvolu("0RS","TUBE",idtmed[4],presist,3);
258     z=-pdiv2[2]+presist[2];
259     gMC->Gspos("0RS",1,"0V2",0,0,z,0,"ONLY");
260     gMC->Gsvolu("0RB","TUBE",idtmed[9],pribber,3);
261     z=pdiv2[2]-pribber[2];
262     gMC->Gspos("0RB",1,"0V2",0,0,z,0,"ONLY");
263     //      printf("z DRIB %f\n",z);
264        
265     
266 }    
267
268
269
270     
271 //------------------------------------------------------------------------
272 void AliSTARTv0::CreateMaterials()
273 {
274    Int_t isxfld   = gAlice->Field()->Integ();
275    Float_t sxmgmx = gAlice->Field()->Max();
276    Float_t a,z,d,radl,absl,buf[1];
277    Int_t nbuf;
278
279 // Scintillator CH
280    Float_t ascin[2]={1.01,12.01};
281    Float_t zscin[2]={1,6};
282    Float_t wscin[2]={1,1};
283    Float_t denscin=1.03;
284 // PMT glass SiO2
285    Float_t aglass[2]={28.0855,15.9994};
286    Float_t zglass[2]={14.,8.};
287    Float_t wglass[2]={1.,2.};
288    Float_t dglass=2.65;
289 // Ceramic   97.2% Al2O3 , 2.8% SiO2
290    Float_t acer[2],zcer[2],wcer[2]={0.972,0.028};
291    Float_t aal2o3[2]  = { 26.981539,15.9994 };
292    Float_t zal2o3[2]  = { 13.,8. };
293    Float_t wal2o3[2]  = { 2.,3. };
294    Float_t denscer  = 3.6;
295
296 // Brass 80% Cu, 20% Zn
297    Float_t abrass[2] = {63.546,65.39};
298    Float_t zbrass[2] = {29,30};
299    Float_t wbrass[2] = {0.8,0.2};
300    Float_t denbrass=8.96;
301
302 //Ribber C6H12S
303    Float_t aribber[3] = {12.,1.,32.};
304    Float_t zribber[3] = {6.,1.,16.};
305    Float_t wribber[3] = {6.,12.,1.};
306    Float_t denribber=0.8;
307    /*
308 // Definition Cherenkov parameters
309    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 };
310    Float_t rindex_quarz[14] = { 1.528309,1.533333,
311                                 1.538243,1.544223,1.550568,1.55777,
312                                 1.565463,1.574765,1.584831,1.597027,
313                                 1.611858,1.6277,1.6472,1.6724 };
314  
315    Float_t absco_quarz[14] = { 20.126,16.27,13.49,11.728,9.224,8.38,7.44,7.17,
316                                 6.324,4.483,1.6,.323,.073,0. };
317    */
318    //   Int_t *idtmed = fIdtmed->GetArray()-999;
319     
320    //  TGeant3 *geant3 = (TGeant3*) gMC;
321     
322 //*** Definition Of avaible START materials ***
323    AliMaterial(0, "START Steel$", 55.850,26.,7.87,1.76,999);
324    AliMaterial(1, "START Vacuum$", 1.e-16,1.e-16,1.e-16,1.e16,999);
325    AliMaterial(2, "START Air$", 14.61, 7.3, .001205, 30423.,999); 
326
327    AliMixture( 3, "Al2O3   $", aal2o3, zal2o3, denscer, -2, wal2o3);
328    AliMixture( 4, "PMT glass   $",aglass,zglass,dglass,-2,wglass);
329    char namate[21];
330    gMC->Gfmate((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
331    acer[0]=a;
332    zcer[0]=z;
333    gMC->Gfmate((*fIdmate)[4], namate, a, z, d, radl, absl, buf, nbuf);
334    acer[1]=a;
335    zcer[1]=z;
336    
337    AliMixture( 9, "Ceramic    $", acer, zcer, denscer, 2, wcer);
338    AliMixture( 5, "Scintillator$",ascin,zscin,denscin,-2,wscin);
339    AliMixture( 6, "Brass    $", abrass, zbrass, denbrass, 2, wbrass);
340    
341    AliMixture( 7, "Ribber $",aribber,zribber,denribber,-3,wribber);
342    
343    
344    AliMedium(1, "START Air$", 2, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
345    AliMedium(2, "Scintillator$", 5, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
346    AliMedium(3, "Vacuum$", 1, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
347    AliMedium(4, "Ceramic$", 9, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
348    AliMedium(6, "Glass$", 4, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
349    AliMedium(8, "Steel$", 0, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
350    AliMedium(11, "Brass  $", 6, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
351    AliMedium(9, "Ribber  $", 7, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
352
353 //  geant3->Gsckov(idtmed[2105], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
354
355 }
356 //---------------------------------------------------------------------
357 void AliSTARTv0::DrawModule()
358 {
359 //
360 // Draw a shaded view of the Forward multiplicity detector version 0
361 //
362   
363   //Set ALIC mother transparent
364   gMC->Gsatt("ALIC","SEEN",0);
365   //
366   //Set volumes visible
367   gMC->Gsatt("0STA","SEEN",0);
368   gMC->Gsatt("0PMT","SEEN",1);
369   gMC->Gsatt("0DIV","SEEN",1);
370   //
371   gMC->Gdopt("hide","on");
372   gMC->Gdopt("shad","on");
373   gMC->SetClipBox(".");
374   gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
375   gMC->DefaultRange();
376   gMC->Gdraw("alic",40,30,0,12,9.5,.7,0.7);
377   gMC->Gdhead(1111,"T-Zero detector");
378   gMC->Gdopt("hide","off");
379 }
380
381 //-------------------------------------------------------------------
382 void AliSTARTv0::Init()
383 {
384 // Initialises version 0 of the Forward Multiplicity Detector
385 //
386 //Int_t *idtmed  = gAlice->Idtmed();
387   AliSTART::Init();
388   fIdSens1=gMC->VolId("0TOP");
389   printf("*** START version 0 initialized ***\n");
390  
391 }
392
393 //-------------------------------------------------------------------
394
395 void AliSTARTv0::StepManager()
396 {
397   //
398   // Called for every step in the START Detector
399   // See AliSTARTv1
400
401 }
402 //---------------------------------------------------------------------
403
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