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 **************************************************************************/
18 Revision 1.15 2000/06/07 16:25:37 cblume
19 Try to remove compiler warnings on Sun and HP
21 Revision 1.14 2000/02/28 19:10:26 cblume
22 Include the new TRD classes
24 Revision 1.13.4.1 2000/02/28 18:01:53 cblume
25 Change to new hit version and introduce geometry class
27 Revision 1.13 1999/11/05 22:50:28 fca
28 Do not use Atan, removed from ROOT too
30 Revision 1.12 1999/11/02 16:35:56 fca
31 New version of TRD introduced
33 Revision 1.11 1999/11/01 20:41:51 fca
34 Added protections against using the wrong version of FRAME
36 Revision 1.10 1999/09/29 09:24:35 fca
37 Introduction of the Copyright and cvs Log
41 ///////////////////////////////////////////////////////////////////////////////
43 // Transition Radiation Detector version 0 -- fast simulator //
47 <img src="picts/AliTRDfullClass.gif">
52 ///////////////////////////////////////////////////////////////////////////////
63 #include "AliTRDgeometry.h"
67 //_____________________________________________________________________________
68 AliTRDv0::AliTRDv0():AliTRD()
71 // AliTRDv0 default constructor
83 //_____________________________________________________________________________
84 AliTRDv0::AliTRDv0(const char *name, const char *title)
88 // Standard constructor for Transition Radiation Detector version 0
100 //_____________________________________________________________________________
101 AliTRDv0::~AliTRDv0()
104 // AliTRDv0 destructor
109 //_____________________________________________________________________________
110 void AliTRDv0::CreateGeometry()
113 // Create the GEANT geometry for the Transition Radiation Detector - Version 0
114 // This version covers the full azimuth.
117 // Check that FRAME is there otherwise we have no place where to put the TRD
118 AliModule* frame = gAlice->GetModule("FRAME");
121 // Define the chambers
122 AliTRD::CreateGeometry();
126 //_____________________________________________________________________________
127 void AliTRDv0::CreateMaterials()
130 // Create materials for the Transition Radiation Detector
133 AliTRD::CreateMaterials();
137 //_____________________________________________________________________________
138 void AliTRDv0::Init()
141 // Initialize Transition Radiation Detector after geometry is built
146 // Identifier of the sensitive volume (amplification region)
147 fIdSens = gMC->VolId("UL06");
149 // Identifier of the TRD-driftchambers
150 fIdChamber1 = gMC->VolId("UCIO");
151 fIdChamber2 = gMC->VolId("UCIM");
152 fIdChamber3 = gMC->VolId("UCII");
154 printf(" Fast simulator\n\n");
155 for (Int_t i = 0; i < 80; i++) printf("*");
160 //_____________________________________________________________________________
161 void AliTRDv0::StepManager()
164 // Procedure called at every step in the TRD
165 // Fast simulator. If switched on, a hit is produced when a track
166 // crosses the border between amplification region and pad plane.
172 Int_t iIdSens, icSens;
173 Int_t iIdChamber, icChamber;
179 TClonesArray &lhits = *fHits;
181 // Writing out hits enabled?
182 if (!(fHitsOn)) return;
184 // Use only charged tracks and count them only once per volume
185 if (gMC->TrackCharge() &&
186 gMC->IsTrackExiting()) {
188 // Check on sensitive volume
189 iIdSens = gMC->CurrentVolID(icSens);
190 if (iIdSens == fIdSens) {
192 gMC->TrackPosition(p);
193 for (Int_t i = 0; i < 3; i++) hits[i] = p[i];
197 // The sector number (0 - 17)
198 // The numbering goes clockwise and starts at y = 0
199 Float_t phi = kRaddeg*TMath::ATan2(hits[0],hits[1]);
204 sec = ((Int_t) (phi / 20));
206 // The chamber number
212 iIdChamber = gMC->CurrentVolOffID(1,icChamber);
213 if (iIdChamber == fIdChamber1)
214 cha = (hits[2] < 0 ? 0 : 4);
215 else if (iIdChamber == fIdChamber2)
216 cha = (hits[2] < 0 ? 1 : 3);
217 else if (iIdChamber == fIdChamber3)
220 // The plane number (0 - 5)
221 pla = icChamber - TMath::Nint((Float_t) (icChamber / 7)) * 6 - 1;
223 det[0] = fGeometry->GetDetector(pla,cha,sec);
224 new(lhits[fNhits++]) AliTRDhit(fIshunt
225 ,gAlice->CurrentTrack()