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>
32 #include <TLorentzVector.h>
40 #include "AliFMDhit.h"
46 //--------------------------------------------------------------------
47 AliFMDv0::AliFMDv0(const char *name, const char *title):
51 // Standart constructor for Forward Multiplicity Detector version 0
58 // setBufferSize(128000);
60 //-------------------------------------------------------------------------
62 void AliFMDv0::CreateGeometry()
65 // Create the geometry of Forward Multiplicity Detector version 0
66 //Detector consists of 5 volumes:
67 // 1st covered pseudorapidity interval from 3.58 to 2.03
68 // and placed on 62.8cm in Z-direction;
69 // 2nd - from 1.94 to 1.51 and Z=75.2 cm;
70 // 3d - the same pseudorapidity interval as the 1st
71 // but on the other side from the interaction point z=-62.8cm;
72 // 4th - simmetricaly with the 2nd :
73 // pseudorapidity from 1.94 to 1.51, Z=-75.2cm
74 // 5th - from 3.71 to 5.28, Z=-345cm
75 // Each part has 300mkm Si (sensetive area, detector itself),
76 // 0.75cm of plastic simulated electronics material,
77 // Al support ring 2cm thickness and 1cm width placed on
78 // the outer radius of each Si disk;
82 <img src="gif/AliFMDv0.gif">
86 Int_t *idtmed = fIdtmed->GetArray();
91 char name[5], nameSi[5], nameSector[5], nameRing[5];
93 Float_t rin[6], rout[6],zpos;
95 Float_t etain[5]= {3.58, 1.94, 3.58, 1.94, 5.28};
96 Float_t etaout[6]={2.03, 1.51, 2.03, 1.51, 3.71};
97 // Float_t z[6]={64., 85., -64., -85., -270., -630};
98 Float_t z[6]={62.8, 75.2, -62.8, -75.2, -345.};
100 Float_t zElectronic=0.1;
103 Float_t etain[6]= {3.3, 2.0, 3.3, 2.0, 4.5, 5.5};
104 Float_t etaout[6]={2.0, 1.6, 2.0, 1.6, 3.3, 4.5};
105 Float_t z[6]={64., 85., -64., -85., -240., -630};
107 Float_t zElectronic=0.75;
112 //-------------------------------------------------------------------
114 //------------------------------------------------------------------
116 AliMatrix(idrotm[901], 90, 0, 90, 90, 180, 0);
118 // gMC->Gsvolu("GSI","TUBE", idtmed[1], par, 0);
119 gMC->Gsvolu("GEL ","TUBE", idtmed[4], par, 0);
120 gMC->Gsvolu("GSUP","TUBE", idtmed[2], par, 0);
122 for (ifmd =0; ifmd < 5; ifmd++){
124 sprintf(name,"FMD%d",ifmd+1);
125 sprintf(nameSi,"GSI%d",ifmd+1);
126 sprintf(nameSector,"GSC%d",ifmd+1);
127 sprintf(nameRing,"GRN%d",ifmd+1);
130 zfmd=TMath::Abs(z[ifmd]);
131 printf("zfmd %f z[ifmd] %f",zfmd,z[ifmd]);
132 AliFMD::Eta2Radius(etain[ifmd],zfmd,&rin[ifmd]);
133 AliFMD::Eta2Radius(etaout[ifmd],zfmd,&rout[ifmd]);
135 par[0]=rin[ifmd]; // pipe size
138 gMC->Gsvolu(name,"TUBE", idtmed[3], par, 3);
140 gMC->Gsvolu(nameSi,"TUBE", idtmed[1], par, 0);
142 printf ("rin %f rout %f ZFMD %f\n",par[0],par[1],z[ifmd]);
144 gMC->Gspos(name,1,"ALIC",0,0,z[ifmd],0, "ONLY");}
146 gMC->Gspos(name,1,"ALIC",0,0,z[ifmd],idrotm[901], "ONLY");}
150 gMC->Gsposp(nameSi,ifmd+1,name,0,0,zpos,0, "ONLY",par,3);
151 cout<<" Si "<<nameSi<<" ifmd "<<ifmd<<" rin "<<par[0]<<" rout "<<par[1]<<
152 " zDet "<<par[2]<<endl;
154 cout<<"fSectorsSi1 "<<fSectorsSi1<<
155 " fRingsSi1 "<<fRingsSi1<<
156 " fSectorsSi2 "<<fSectorsSi2<<
157 " fRingsSi2 "<<fRingsSi2<<endl;
160 gMC->Gsdvn(nameSector, nameSi , fSectorsSi2, 2);
161 gMC->Gsdvn(nameRing, nameSector, fRingsSi2, 1);
165 gMC->Gsdvn(nameSector, nameSi , fSectorsSi1, 2);
166 gMC->Gsdvn(nameRing, nameSector , fRingsSi1, 1);
169 //Plastic slice for electronics
170 par[2]=zElectronic/2;
171 zpos=zpos-zDet/2-par[2];
172 gMC->Gsposp("GEL ",ifmd+1,name,0,0,zpos,0, "ONLY",par,3);
178 zpos=zpos-zElectronic/2-par[2];
179 // gMC->Gsposp("GSUP",ifmd+1,name,0,0,zpos,0, "ONLY",par,3);
187 //------------------------------------------------------------------------
188 void AliFMDv0::CreateMaterials()
190 Int_t isxfld = gAlice->Field()->Integ();
191 Float_t sxmgmx = gAlice->Field()->Max();
194 Float_t aPlastic[2]={1.01,12.01};
195 Float_t zPlastic[2]={1,6};
196 Float_t wPlastic[2]={1,1};
197 Float_t denPlastic=1.03;
200 //*** Definition Of avaible FMD materials ***
201 AliMaterial(0, "Si chip$", 28.0855,14.,2.33,9.36,999);
202 AliMaterial(1, "Al supprt$", 26.980,13.,2.70,8.9,999);
203 AliMaterial(2, "FMD Air$", 14.61, 7.3, .001205, 30423.,999);
204 AliMixture( 5, "Plastic$",aPlastic,zPlastic,denPlastic,-2,wPlastic);
208 AliMedium(1, "Si chip$", 0, 1, isxfld, sxmgmx, 1., .001, 1., .001, .001);
209 AliMedium(2, "Al support$", 1, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
210 AliMedium(3, "FMD air$", 2, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
211 AliMedium(4, "Plastic$", 5, 0,isxfld, sxmgmx, 10., .01, 1., .003, .003);
216 //---------------------------------------------------------------------
217 void AliFMDv0::DrawDetector()
220 // Draw a shaded view of the Forward multiplicity detector version 0
223 AliMC* pMC = AliMC::GetMC();
225 //Set ALIC mother transparent
226 pMC->Gsatt("ALIC","SEEN",0);
228 //Set volumes visible
229 gMC->Gsatt("FMD0","SEEN",1);
230 gMC->Gsatt("FMD1","SEEN",1);
231 gMC->Gsatt("FMD2","SEEN",1);
232 gMC->Gsatt("FMD3","SEEN",1);
233 gMC->Gsatt("FMD4","SEEN",1);
234 gMC->Gsatt("FMD5","SEEN",1);
237 gMC->Gdopt("hide","on");
238 gMC->Gdopt("shad","on");
239 gMC->SetClipBox(".");
240 gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
242 gMC->Gdraw("alic",40,30,0,12,9.5,.2,0.2);
243 gMC->Gdhead(1111,"Forward multiplicity detector");
244 gMC->Gdopt("hide","off");
246 //-------------------------------------------------------------------
247 void AliFMDv0::Init()
249 // Initialises version 0 of the Forward Multiplicity Detector
251 AliMC* gMC=AliMC::GetMC();
253 fIdSens1=gMC->VolId("GRN1");
254 fIdSens2=gMC->VolId("GRN2");
255 fIdSens3=gMC->VolId("GRN3");
256 fIdSens4=gMC->VolId("GRN4");
257 fIdSens5=gMC->VolId("GRN5");
258 if (fDebug) printf("*** FMD version 0 initialized ***\n");
261 //-------------------------------------------------------------------
263 void AliFMDv0::StepManager()
266 // Called for every step in the Forward Multiplicity Detector