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 1.17 2000/11/01 14:53:21 cblume
19 Merge with TRD-develop
21 Revision 1.14.2.3 2000/10/06 16:49:46 cblume
24 Revision 1.14.2.2 2000/10/04 16:34:58 cblume
25 Replace include files by forward declarations
27 Revision 1.14.2.1 2000/09/18 13:48:18 cblume
28 Adapt to new AliTRDhit
30 Revision 1.16 2000/06/08 18:32:58 cblume
31 Make code compliant to coding conventions
33 Revision 1.15 2000/06/07 16:25:37 cblume
34 Try to remove compiler warnings on Sun and HP
36 Revision 1.14 2000/02/28 19:10:26 cblume
37 Include the new TRD classes
39 Revision 1.13.4.1 2000/02/28 18:01:53 cblume
40 Change to new hit version and introduce geometry class
42 Revision 1.13 1999/11/05 22:50:28 fca
43 Do not use Atan, removed from ROOT too
45 Revision 1.12 1999/11/02 16:35:56 fca
46 New version of TRD introduced
48 Revision 1.11 1999/11/01 20:41:51 fca
49 Added protections against using the wrong version of FRAME
51 Revision 1.10 1999/09/29 09:24:35 fca
52 Introduction of the Copyright and cvs Log
56 ///////////////////////////////////////////////////////////////////////////////
58 // Transition Radiation Detector version 0 -- fast simulator //
62 <img src="picts/AliTRDfullClass.gif">
67 ///////////////////////////////////////////////////////////////////////////////
72 #include <TLorentzVector.h>
79 #include "AliTRDhit.h"
80 #include "AliTRDgeometry.h"
84 //_____________________________________________________________________________
85 AliTRDv0::AliTRDv0():AliTRD()
88 // AliTRDv0 default constructor
100 //_____________________________________________________________________________
101 AliTRDv0::AliTRDv0(const char *name, const char *title)
105 // Standard constructor for Transition Radiation Detector version 0
117 //_____________________________________________________________________________
118 AliTRDv0::~AliTRDv0()
121 // AliTRDv0 destructor
126 //_____________________________________________________________________________
127 void AliTRDv0::CreateGeometry()
130 // Create the GEANT geometry for the Transition Radiation Detector - Version 0
131 // This version covers the full azimuth.
134 // Check that FRAME is there otherwise we have no place where to put the TRD
135 AliModule* frame = gAlice->GetModule("FRAME");
138 // Define the chambers
139 AliTRD::CreateGeometry();
143 //_____________________________________________________________________________
144 void AliTRDv0::CreateMaterials()
147 // Create materials for the Transition Radiation Detector
150 AliTRD::CreateMaterials();
154 //_____________________________________________________________________________
155 void AliTRDv0::Init()
158 // Initialize Transition Radiation Detector after geometry is built
163 // Identifier of the sensitive volume (amplification region)
164 fIdSens = gMC->VolId("UL06");
166 // Identifier of the TRD-driftchambers
167 fIdChamber1 = gMC->VolId("UCIO");
168 fIdChamber2 = gMC->VolId("UCIM");
169 fIdChamber3 = gMC->VolId("UCII");
171 printf(" Fast simulator\n\n");
172 for (Int_t i = 0; i < 80; i++) printf("*");
177 //_____________________________________________________________________________
178 void AliTRDv0::StepManager()
181 // Procedure called at every step in the TRD
182 // Fast simulator. If switched on, a hit is produced when a track
183 // crosses the border between amplification region and pad plane.
189 Int_t iIdSens, icSens;
190 Int_t iIdChamber, icChamber;
196 TClonesArray &lhits = *fHits;
198 // Writing out hits enabled?
199 if (!(fHitsOn)) return;
201 // Use only charged tracks and count them only once per volume
202 if (gMC->TrackCharge() &&
203 gMC->IsTrackExiting()) {
205 // Check on sensitive volume
206 iIdSens = gMC->CurrentVolID(icSens);
207 if (iIdSens == fIdSens) {
209 gMC->TrackPosition(p);
210 for (Int_t i = 0; i < 3; i++) hits[i] = p[i];
212 // The sector number (0 - 17)
213 // The numbering goes clockwise and starts at y = 0
214 Float_t phi = kRaddeg*TMath::ATan2(hits[0],hits[1]);
219 sec = ((Int_t) (phi / 20));
221 // The chamber number
227 iIdChamber = gMC->CurrentVolOffID(1,icChamber);
228 if (iIdChamber == fIdChamber1)
229 cha = (hits[2] < 0 ? 0 : 4);
230 else if (iIdChamber == fIdChamber2)
231 cha = (hits[2] < 0 ? 1 : 3);
232 else if (iIdChamber == fIdChamber3)
235 // The plane number (0 - 5)
236 pla = icChamber - TMath::Nint((Float_t) (icChamber / 7)) * 6 - 1;
237 det = fGeometry->GetDetector(pla,cha,sec);
239 new(lhits[fNhits++]) AliTRDhit(fIshunt
240 ,gAlice->CurrentTrack()