1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 /////////////////////////////////////////////////////////////////////
17 // Forward Multiplicity detector based on Silicon version 0 //
21 <img src="gif/AliFMDv0Class.gif">
26 //////////////////////////////////////////////////////////////////////
29 #include <TGeometry.h>
34 #include <TClonesArray.h>
35 #include <TLorentzVector.h>
36 #include <TDirectory.h>
43 #include "AliFMDhit.h"
44 #include "AliFMDdigit.h"
46 //#include "TGeant3.h"
50 //--------------------------------------------------------------------
51 AliFMDv1::AliFMDv1(const char *name, const char *title):
55 // Standart constructor for Forward Multiplicity Detector version 0
58 // setBufferSize(128000);
60 //-------------------------------------------------------------------------
61 void AliFMDv1::CreateGeometry()
64 // Create the geometry of Forward Multiplicity Detector version 0
66 //Detector consists of 6 volumes:
67 // 1st covered pseudorapidity interval from 3.3 to 2.0
68 // and placed on 65cm in Z-direction;
69 // 2nd - from 2.0 to 1.6 and Z=85 cm;
70 // 3d - the same pseudorapidity interval as the 1st
71 // but on the other side from the interaction point z=-65cm;
72 // 4th - simmetricaly with the 2nd :
73 // pseudorapidity from 2.0 to 1.6, Z=-85cm
74 // 5th - from 3.6 to 4.7, Z=-270cm
75 // 6th - from 4.5 to 5.5 , Z=-630cm.
76 // Each part has 400mkm Si (sensetive area, detector itself),
77 // 0.75cm of plastic simulated electronics material,
78 // Al support ring 2cm thickness and 1cm width placed on
79 // the outer radius of each Si disk;
83 <img src="gif/AliFMDv0.gif">
87 Int_t *idtmed = fIdtmed->GetArray();
94 Float_t rin[6], rout[6],zpos;
95 Float_t etain[6]= {3.3, 2.0, 3.3, 2.0, 4.7, 5.5};
96 Float_t etaout[6]={2.0, 1.6, 2.0, 1.6, 3.6, 4.5};
97 Float_t z[6]={64., 85., -64., -85., -270., -630};
99 Float_t zElectronic=0.75;
102 //-------------------------------------------------------------------
104 //------------------------------------------------------------------
106 AliMatrix(idrotm[901], 90, 0, 90, 90, 180, 0);
108 gMC->Gsvolu("GFSI","TUBE", idtmed[1], par, 0);
109 gMC->Gsvolu("GEL ","TUBE", idtmed[4], par, 0);
110 gMC->Gsvolu("GSUP","TUBE", idtmed[2], par, 0);
112 for (ifmd =0; ifmd < 4; ifmd++){
114 sprintf(name,"FMD%d",ifmd);
116 printf("%s: %s",ClassName(),name);
118 zfmd=TMath::Abs(z[ifmd]);
119 if(fDebug) printf("zfmd %f z[ifmd] %f",zfmd,z[ifmd]);
120 AliFMD::Eta2Radius(etain[ifmd],zfmd,&rin[ifmd]);
121 AliFMD::Eta2Radius(etaout[ifmd],zfmd,&rout[ifmd]);
123 par[0]=rin[ifmd]; // pipe size
126 gMC->Gsvolu(name,"TUBE", idtmed[3], par, 3);
128 if(fDebug) printf ("rin %f rout %f ZFMD %f\n",par[0],par[1],z[ifmd]);
130 gMC->Gspos(name,1,"ALIC",0,0,z[ifmd],0, "ONLY");}
132 gMC->Gspos(name,1,"ALIC",0,0,z[ifmd],idrotm[901], "ONLY");}
136 gMC->Gsposp("GFSI",ifmd+1,name,0,0,zpos,0, "ONLY",par,3);
138 //Plastic slice for electronics
139 par[2]=zElectronic/2;
140 zpos=zpos-zDet/2-par[2];
141 gMC->Gsposp("GEL ",ifmd+1,name,0,0,zpos,0, "ONLY",par,3);
147 zpos=zpos-zElectronic/2-par[2];
148 gMC->Gsposp("GSUP",ifmd+1,name,0,0,zpos,0, "ONLY",par,3);
156 gMC->Gsdvn("GSEC", "GFSI", 16, 2);
157 gMC->Gsdvn("GRIN", "GSEC", 128, 1);
159 for (Int_t i=0; i<16; i++){
160 sprintf(ring,"GR%d",i);
162 gMC->Gsdvn(ring, "GSEC", 128, 1);
167 //------------------------------------------------------------------------
168 void AliFMDv1::CreateMaterials()
170 Int_t isxfld = gAlice->Field()->Integ();
171 Float_t sxmgmx = gAlice->Field()->Max();
174 Float_t aPlastic[2]={1.01,12.01};
175 Float_t zPlastic[2]={1,6};
176 Float_t wPlastic[2]={1,1};
177 Float_t denPlastic=1.03;
180 //*** Definition Of avaible FMD materials ***
181 AliMaterial(0, "Si chip$", 28.0855,14.,2.33,9.36,999);
182 AliMaterial(1, "Al supprt$", 26.980,13.,2.70,8.9,999);
183 AliMaterial(2, "FMD Air$", 14.61, 7.3, .001205, 30423.,999);
184 AliMixture( 5, "Plastic$",aPlastic,zPlastic,denPlastic,-2,wPlastic);
188 AliMedium(1, "Si chip$", 0, 1, isxfld, sxmgmx, 1., .001, 1., .001, .001);
189 AliMedium(2, "Al support$", 1, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
190 AliMedium(3, "FMD air$", 2, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
191 AliMedium(4, "Plastic$", 5, 0,isxfld, sxmgmx, 10., .01, 1., .003, .003);
196 //---------------------------------------------------------------------
197 void AliFMDv1::DrawDetector()
200 // Draw a shaded view of the Forward multiplicity detector version 0
203 AliMC* pMC = AliMC::GetMC();
205 //Set ALIC mother transparent
206 pMC->Gsatt("ALIC","SEEN",0);
208 //Set volumes visible
209 gMC->Gsatt("FMD0","SEEN",1);
210 gMC->Gsatt("FMD1","SEEN",1);
211 gMC->Gsatt("FMD2","SEEN",1);
212 gMC->Gsatt("FMD3","SEEN",1);
213 gMC->Gsatt("FMD4","SEEN",1);
214 gMC->Gsatt("FMD5","SEEN",1);
217 gMC->Gdopt("hide","on");
218 gMC->Gdopt("shad","on");
219 gMC->SetClipBox(".");
220 gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
222 gMC->Gdraw("alic",40,30,0,12,9.5,.2,0.2);
223 gMC->Gdhead(1111,"Forward multiplicity detector");
224 gMC->Gdopt("hide","off");
226 //-------------------------------------------------------------------
227 void AliFMDv1::Init()
229 // Initialises version 0 of the Forward Multiplicity Detector
231 AliMC* gMC=AliMC::GetMC();
233 fIdSens1=gMC->VolId("GRIN");
234 if(fDebug) printf("%s: *** FMD version 1 initialized ***\n",ClassName());
237 //-------------------------------------------------------------------
239 void AliFMDv1::StepManager()
242 // Called for every step in the Forward Multiplicity Detector
244 Int_t id,copy,copy1,copy2;
245 static Float_t hits[9];
252 TClonesArray &lhits = *fHits;
253 AliMC* gMC=AliMC::GetMC();
254 if(!gMC->IsTrackAlive()) return; // particle has disappeared
256 Float_t charge = gMC->TrackCharge();
257 if(TMath::Abs(charge)<=0.) return; //take only charged particles
259 // printf(" in StepManeger \n");
260 id=gMC->CurrentVolID(copy);
262 // Check the sensetive volume
265 if(gMC->IsTrackEntering())
267 // ((TGeant3*)gMC)->Gpcxyz();
269 gMC->CurrentVolOffID(1,copy1);
271 gMC->CurrentVolOffID(2,copy2);
273 gMC->TrackPosition(pos);
277 gMC->TrackMomentum(mom);
282 Int_t iPart= gMC->TrackPid();
283 Int_t partId=gMC->IdFromPDG(iPart);
285 hits[8]=1e9*gMC->TrackTime();
287 // for(i=0; i<9; i++) printf(" hits %f \n",hits[i]);
289 if(gMC->IsTrackInside()){
290 de=de+1000.*gMC->Edep();
293 if(gMC->IsTrackExiting()
294 ||gMC->IsTrackDisappeared()||
297 hits[6]=de+1000.*gMC->Edep();
298 new(lhits[fNhits++]) AliFMDhit(fIshunt,gAlice->CurrentTrack(),vol,hits);
299 } // IsTrackExiting()