31595ce4cc7ad0759885cd168f741b65deee0e88
[u/mrichter/AliRoot.git] / START / AliSTARTv1.cxx
1 /**************************************************************************
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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 zdetRight=69.7,zdetLeft=350;
99  //-------------------------------------------------------------------
100  //  START volume 
101  //-------------------------------------------------------------------
102   
103   //  Float_t theta=TMath::ATan(6.5/zdet);
104   Float_t thetaRight=(180./3.1415)*TMath::ATan(6.5/zdetRight);
105   Float_t thetaLeft=(180./3.1415)*TMath::ATan(6.5/zdetLeft);
106     AliMatrix(idrotm[901], 90., 0., 90., 90., 180., 0.);
107     
108     gMC->Gsvolu("0STR","TUBE",idtmed[1],pstart,3);
109     gMC->Gsvolu("0STL","TUBE",idtmed[1],pstart,3);
110     gMC->Gspos("0STR",1,"ALIC",0.,0.,zdetRight+pstart[2],0,"ONLY");
111     gMC->Gspos("0STL",1,"ALIC",0.,0.,-zdetLeft-pstart[2],idrotm[901],"ONLY");
112
113 //START interior
114     gMC->Gsvolu("0INS","TUBE",idtmed[1],pinstart,3);
115     gMC->Gsvolu("0PMT","TUBE",idtmed[3],ppmt,3);     
116     gMC->Gsvolu("0DIV","TUBE",idtmed[3],pdivider,3);     
117
118 // first ring: 12 units of Scintillator+PMT+divider
119     Double_t dang1 = 2*TMath::Pi()/12;
120     for (is=1; is<=12; is++)
121       {  
122         AliMatrix(idrotm[901+is], 
123                   90.-thetaRight, 30.*is, 
124                   90.,       90.+30.*is,
125                   thetaRight,    180.+30.*is); 
126         x=6.5*TMath::Sin(is*dang1);
127         y=6.5*TMath::Cos(is*dang1);
128         z=-pstart[2]+pinstart[2];
129         gMC->Gspos("0INS",is,"0STR",x,y,z,idrotm[901+is],"ONLY");
130
131       } 
132     for (is=1; is<=12; is++)
133       {
134         AliMatrix(idrotm[901+is],
135                   90.-thetaLeft, 30.*is,
136                   90.,       90.+30.*is,
137                   thetaLeft,    180.+30.*is);
138
139         x=6.5*TMath::Sin(is*dang1);
140         y=6.5*TMath::Cos(is*dang1);
141         z=-pstart[2]+pinstart[2];
142         gMC->Gspos("0INS",is,"0STL",x,y,z,idrotm[901+is],"ONLY");
143
144       }
145      x=0;
146     y=0;
147     z=-pinstart[2]+ppmt[2];
148     if(fDebug) printf("%s: is %d, z Divider %f\n",ClassName(),is,z);
149     gMC->Gspos("0PMT",1,"0INS",x,y,z,0,"ONLY");
150     z=pinstart[2]-pdivider[2];
151     gMC->Gspos("0DIV",1,"0INS",x,y,z,0,"ONLY");
152       
153      /*  
154 //second ring: 20 units of Scintillator+PMT+divider
155       Double_t dang2 = 2*TMath::Pi()/26;
156       Double_t dang3 = 2*TMath::Pi()/20;
157        for (is=14; is<=33;is++)  
158      {  
159      x=9.3*TMath::Sin(dang2+(is-13)*dang3);
160      y=9.3*TMath::Cos(dang2+(is-13)*dang3);
161       z=-pstart[2]+ppmt[2];
162       gMC->Gspos("0PMT",is,"0STA",x,y,z,0,"ONLY");
163       z=z+ppmt[2]+pdiv2[2];
164       gMC->Gspos("0DIV",is,"0STA",x,y,z,0,"ONLY");
165       }
166      */
167 // PMT
168       
169     // Entry window (glass)
170     gMC->Gsvolu("0TOP","TUBE",idtmed[6],ptop,3); //glass
171      //   gMC->Gsvolu("0TOP","TUBE",idtmed[12],ptop,3); //lucite
172      z=-ppmt[2]+ptop[2];
173     gMC->Gspos("0TOP",1,"0PMT",0,0,z,0,"ONLY");
174     //     printf("Z PTOP %f -ppmt[2] %f ptop[2] %f\n",z,-ppmt[2],ptop[2]);
175     
176     // Bottom glass
177     gMC->Gsvolu("0BOT","TUBE",idtmed[6],pbot,3);
178     z=ppmt[2]-pbot[2];
179     if(fDebug) printf("%s: Z bottom %f\n",ClassName(),z);
180     gMC->Gspos("0BOT",1,"0PMT",0,0,z,0,"ONLY");
181     // Side cylinder glass
182     gMC->Gsvolu("0OUT","TUBE",idtmed[6],pglass,3);
183     z=ppmt[2]-pglass[2];
184     //      printf("Z glass %f\n",z);
185     gMC->Gspos("0OUT",1,"0PMT",0,0,z,0,"ONLY");
186     //PMT electrodes support structure
187     gMC->Gsvolu("0CER","TUBE",idtmed[4],pcer,3);
188     gMC->Gsvolu("0STE","TUBE",idtmed[8],psteel,3);
189     z=-ppmt[2]+2*ptop[2]+0.3;;
190     //      printf("Z Cer 1 %f\n",z);
191     for (is=1; is<=15; is++)
192       {
193         z=z+psteel[2]+pcer[2];
194         gMC->Gspos("0CER",is,"0PMT",0,0,z,0,"ONLY");
195         z=z+psteel[2]+pcer[2];
196         gMC->Gspos("0STE",is,"0PMT",0,0,z,0,"ONLY");
197       }
198     
199     // Divider
200     // Knob at the bottom of PMT baloon
201     
202     gMC->Gsvolu("0NB","TUBE",idtmed[6],pknob,3);
203     z=-pdivider[2]+pknob[2];
204     //      printf("zknob %f\n",z);
205     gMC->Gspos("0NB",1,"0DIV",0,0,z,0,"ONLY");
206     gMC->Gsvolu("0KB","TUBE",idtmed[6],pknob_bot,3);
207     z=-pdivider[2]+2*pknob[2]+pknob_bot[2];
208     //      printf(knobbot %f\n",z);
209     gMC->Gspos("0KB",1,"0DIV ",0,0,z,0,"ONLY");
210     gMC->Gsvolu("0VAC","TUBE",idtmed[3],pknob_vac,3);
211     z=-pdivider[2]+pknob_vac[2];
212     //      printf("knobvac %f\n",z);
213     gMC->Gspos("0VAC",1,"0DIV",0,0,z,0,"ONLY");
214     //Steel pins + pin holes
215     gMC->Gsvolu("0PIN","TUBE",idtmed[8],ppins,3);
216     z=-pdivider[2]+ppins[2];
217     gMC->Gspos("0PIN",1,"0DIV",0,0,z,0,"ONLY");
218     gMC->Gsvolu("0HOL","TUBE",idtmed[11],phole,3);
219     z=-pdivider[2]+2*ppins[2]+phole[2];
220     gMC->Gspos("0HOL",1,"0DIV",0,0,z,0,"ONLY");
221     
222     //Socket
223     gMC->Gsvolu("0V1","TUBE",idtmed[4],pdiv1,3);
224     z=-pdivider[2]+pdiv1[2];
225     gMC->Gspos("0V1",1,"0DIV",0,0,z,0,"ONLY");
226     //Resistors
227     gMC->Gsvolu("0V2","TUBE",idtmed[1],pdiv2,3);
228     z=pdivider[2]-pdiv2[2];
229     gMC->Gspos("0V2",1,"0DIV",0,0,z,0,"ONLY");
230     gMC->Gsvolu("0RS","TUBE",idtmed[4],presist,3);
231     z=-pdiv2[2]+presist[2];
232     gMC->Gspos("0RS",1,"0V2",0,0,z,0,"ONLY");
233     gMC->Gsvolu("0RB","TUBE",idtmed[9],pribber,3);
234     z=pdiv2[2]-pribber[2];
235     gMC->Gspos("0RB",1,"0V2",0,0,z,0,"ONLY");
236     //      printf("z DRIB %f\n",z);
237        
238     
239 }    
240 //------------------------------------------------------------------------
241 void AliSTARTv1::CreateMaterials()
242 {
243    Int_t isxfld   = gAlice->Field()->Integ();
244    Float_t sxmgmx = gAlice->Field()->Max();
245    Float_t a,z,d,radl,absl,buf[1];
246    Int_t nbuf;
247
248 // Scintillator CH
249    Float_t ascin[2]={1.01,12.01};
250    Float_t zscin[2]={1,6};
251    Float_t wscin[2]={1,1};
252    Float_t denscin=1.03;
253 //Lucite C(CH3)CO2CH3
254    Float_t alucite[3]={1.01,12.01,15.999};
255    Float_t zlucite[3]={1,6,8};
256    Float_t wlucite[3]={8,5,2};
257    Float_t denlucite=1.16;
258  // PMT glass SiO2
259    Float_t aglass[2]={28.0855,15.9994};
260    Float_t zglass[2]={14.,8.};
261    Float_t wglass[2]={1.,2.};
262    Float_t dglass=2.65;
263 // Ceramic   97.2% Al2O3 , 2.8% SiO2
264    Float_t acer[2],zcer[2],wcer[2]={0.972,0.028};
265    Float_t aal2o3[2]  = { 26.981539,15.9994 };
266    Float_t zal2o3[2]  = { 13.,8. };
267    Float_t wal2o3[2]  = { 2.,3. };
268    Float_t denscer  = 3.6;
269
270 // Brass 80% Cu, 20% Zn
271    Float_t abrass[2] = {63.546,65.39};
272    Float_t zbrass[2] = {29,30};
273    Float_t wbrass[2] = {0.8,0.2};
274    Float_t denbrass=8.96;
275
276 //Ribber C6H12S
277    Float_t aribber[3] = {12.,1.,32.};
278    Float_t zribber[3] = {6.,1.,16.};
279    Float_t wribber[3] = {6.,12.,1.};
280    Float_t denribber=0.8;
281    /*
282 // Definition Cherenkov parameters
283    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 };
284    Float_t rindex_quarz[14] = { 1.528309,1.533333,
285                                 1.538243,1.544223,1.550568,1.55777,
286                                 1.565463,1.574765,1.584831,1.597027,
287                                 1.611858,1.6277,1.6472,1.6724 };
288  
289    Float_t absco_quarz[14] = { 20.126,16.27,13.49,11.728,9.224,8.38,7.44,7.17,
290                                 6.324,4.483,1.6,.323,.073,0. };
291    */
292     
293 //*** Definition Of avaible START materials ***
294    AliMaterial(0, "START Steel$", 55.850,26.,7.87,1.76,999);
295    AliMaterial(1, "START Vacuum$", 1.e-16,1.e-16,1.e-16,1.e16,999);
296    AliMaterial(2, "START Air$", 14.61, 7.3, .001205, 30423.,999); 
297
298    AliMixture( 3, "Al2O3   $", aal2o3, zal2o3, denscer, -2, wal2o3);
299    AliMixture( 4, "PMT glass   $",aglass,zglass,dglass,-2,wglass);
300    char namate[21];
301    gMC->Gfmate((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
302    acer[0]=a;
303    zcer[0]=z;
304    gMC->Gfmate((*fIdmate)[4], namate, a, z, d, radl, absl, buf, nbuf);
305    acer[1]=a;
306    zcer[1]=z;
307    
308    AliMixture( 9, "Ceramic    $", acer, zcer, denscer, 2, wcer);
309    AliMixture( 5, "Scintillator$",ascin,zscin,denscin,-2,wscin);
310    AliMixture( 6, "Brass    $", abrass, zbrass, denbrass, 2, wbrass);
311    
312    AliMixture( 7, "Ribber $",aribber,zribber,denribber,-3,wribber);
313    AliMixture( 8, "Lucite$",alucite,zlucite,denlucite,-3,wlucite);
314    
315    
316    AliMedium(1, "START Air$", 2, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
317    AliMedium(2, "Scintillator$", 5, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
318    AliMedium(3, "Vacuum$", 1, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
319    AliMedium(4, "Ceramic$", 9, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
320    AliMedium(6, "Glass$", 4, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
321    AliMedium(8, "Steel$", 0, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
322    AliMedium(9, "Ribber  $", 7, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
323    AliMedium(11, "Brass  $", 6, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
324    AliMedium(12, "Lucite$", 8, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);  
325
326    if(fDebug) cout<<ClassName()<<": ++++++++++++++Medium set++++++++++"<<endl;
327
328 //  geant3->Gsckov(idtmed[2105], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
329
330 }
331 //---------------------------------------------------------------------
332 void AliSTARTv1::DrawDetector()
333 {
334 //
335 // Draw a shaded view of the Forward multiplicity detector version 0
336 //
337   
338   //Set ALIC mother transparent
339   gMC->Gsatt("ALIC","SEEN",0);
340   //
341   //Set volumes visible
342   //  gMC->Gsatt("0ST","SEEN",0);
343   gMC->Gsatt("0INS","SEEN",0);
344   gMC->Gsatt("0PMT","SEEN",1);
345   gMC->Gsatt("0DIV","SEEN",1);
346   //
347   gMC->Gdopt("hide","on");
348   gMC->Gdopt("shad","on");
349   gMC->SetClipBox(".");
350   gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
351   gMC->DefaultRange();
352   gMC->Gdraw("alic",40,30,0,12,9.5,.7,0.7);
353   gMC->Gdhead(1111,"T-Zero detector");
354   gMC->Gdopt("hide","off");
355 }
356
357 //-------------------------------------------------------------------
358 void AliSTARTv1::Init()
359 {
360 // Initialises version 0 of the Forward Multiplicity Detector
361 //
362 //Int_t *idtmed  = gAlice->Idtmed();
363   AliSTART::Init();
364   fIdSens1=gMC->VolId("0TOP");
365   if(fDebug) printf("%s: *** START version 0 initialized ***\n",ClassName());
366  
367 }
368
369 //-------------------------------------------------------------------
370
371 void AliSTARTv1::StepManager()
372 {
373   //
374   // Called for every step in the START Detector
375   //
376   Int_t id,copy,copy1;
377   static Float_t hits[7];
378   static Float_t edep;
379   static Int_t vol[2];
380   TLorentzVector pos;
381   
382   TClonesArray &lhits = *fHits;
383   
384   if(!gMC->IsTrackAlive()) return; // particle has disappeared
385   Float_t charge = gMC->TrackCharge();
386   if(TMath::Abs(charge)<=0.) return; //take only charged particles
387   id=gMC->CurrentVolID(copy);
388   
389   
390    // Check the sensetive volume
391   if(id==fIdSens1 ) {
392     if(gMC->IsTrackEntering()) {
393       gMC->CurrentVolOffID(2,copy);
394       vol[1]=copy;
395       gMC->CurrentVolOffID(3,copy1);
396       vol[0]=copy1;
397
398       gMC->TrackPosition(pos);
399       hits[0] = pos[0];
400       hits[1] = pos[1];
401       hits[2] = pos[2];
402       if(pos[2]<0) vol[0]=2;
403       if(pos[2]>=0) vol[0]=1;
404      
405       Float_t etot=gMC->Etot();
406       hits[4]=etot;
407       Int_t iPart= gMC->TrackPid();
408       Int_t partID=gMC->IdFromPDG(iPart);
409       hits[5]=partID;
410       Float_t ttime=gMC->TrackTime();
411       hits[6]=ttime*1e9;
412       edep=0;
413     }
414     if(gMC->IsTrackInside())    {
415       Float_t de=gMC->Edep(); 
416       edep=edep+de;
417     } 
418   
419     if(gMC->IsTrackExiting())   {
420       Float_t de=gMC->Edep(); 
421       edep=edep+de;
422       hits[3]=edep*1e3;
423       new(lhits[fNhits++]) AliSTARThit(fIshunt,gAlice->CurrentTrack(),vol,hits);      
424     }
425   }
426 //---------------------------------------------------------------------
427 }
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