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 1.20 2002/10/31 17:45:35 cblume
21 Revision 1.19 2002/10/14 14:57:43 hristov
22 Merging the VirtualMC branch to the main development branch (HEAD)
24 Revision 1.15.6.2 2002/07/24 10:09:30 alibrary
27 Revision 1.15.6.1 2002/06/10 15:28:58 hristov
30 Revision 1.17 2002/04/05 13:20:12 cblume
31 Remove const for CreateGeometry
33 Revision 1.16 2002/03/28 14:59:07 cblume
36 Revision 1.18 2002/06/12 09:54:35 cblume
37 Update of tracking code provided by Sergei
39 Revision 1.17 2002/04/05 13:20:12 cblume
40 Remove const for CreateGeometry
42 Revision 1.16 2002/03/28 14:59:07 cblume
45 Revision 1.15 2002/02/11 14:21:16 cblume
46 Update of the geometry. Get rid of MANY
48 Revision 1.14 2001/11/06 17:19:41 cblume
49 Add detailed geometry and simple simulator
51 Revision 1.13 2001/08/02 08:30:45 cblume
52 Fix positions of cooling material
54 Revision 1.12 2001/05/21 16:45:47 hristov
55 Last minute changes (C.Blume)
57 Revision 1.11 2001/05/11 07:56:12 hristov
58 Consistent declarations needed on Alpha
60 Revision 1.10 2001/05/07 08:08:05 cblume
63 Revision 1.9 2001/03/27 12:48:33 cblume
64 Correct for volume overlaps
66 Revision 1.8 2001/03/13 09:30:35 cblume
67 Update of digitization. Moved digit branch definition to AliTRD
69 Revision 1.7 2001/02/14 18:22:26 cblume
70 Change in the geometry of the padplane
72 Revision 1.6 2000/11/01 14:53:20 cblume
73 Merge with TRD-develop
75 Revision 1.1.4.7 2000/10/16 01:16:53 cblume
76 Changed timebin 0 to be the one closest to the readout
78 Revision 1.1.4.6 2000/10/15 23:35:57 cblume
79 Include geometry constants as static member
81 Revision 1.1.4.5 2000/10/06 16:49:46 cblume
84 Revision 1.1.4.4 2000/10/04 16:34:58 cblume
85 Replace include files by forward declarations
87 Revision 1.1.4.3 2000/09/22 14:43:40 cblume
88 Allow the pad/timebin-dimensions to be changed after initialization
90 Revision 1.1.4.2 2000/09/18 13:37:01 cblume
91 Minor coding corrections
93 Revision 1.5 2000/10/02 21:28:19 fca
94 Removal of useless dependecies via forward declarations
96 Revision 1.4 2000/06/08 18:32:58 cblume
97 Make code compliant to coding conventions
99 Revision 1.3 2000/06/07 16:25:37 cblume
100 Try to remove compiler warnings on Sun and HP
102 Revision 1.2 2000/05/08 16:17:27 cblume
105 Revision 1.1.4.1 2000/05/08 14:45:55 cblume
106 Bug fix in RotateBack(). Geometry update
108 Revision 1.4 2000/06/08 18:32:58 cblume
109 Make code compliant to coding conventions
111 Revision 1.3 2000/06/07 16:25:37 cblume
112 Try to remove compiler warnings on Sun and HP
114 Revision 1.2 2000/05/08 16:17:27 cblume
117 Revision 1.1.4.1 2000/05/08 14:45:55 cblume
118 Bug fix in RotateBack(). Geometry update
120 Revision 1.1 2000/02/28 19:00:44 cblume
125 ///////////////////////////////////////////////////////////////////////////////
127 // TRD geometry class //
129 ///////////////////////////////////////////////////////////////////////////////
133 #include "AliTRDgeometry.h"
134 #include "AliTRDparameter.h"
137 ClassImp(AliTRDgeometry)
139 //_____________________________________________________________________________
142 // The geometry constants
144 const Int_t AliTRDgeometry::fgkNsect = kNsect;
145 const Int_t AliTRDgeometry::fgkNplan = kNplan;
146 const Int_t AliTRDgeometry::fgkNcham = kNcham;
147 const Int_t AliTRDgeometry::fgkNdet = kNdet;
150 // Dimensions of the detector
153 // Inner and outer radius of the mother volumes
154 const Float_t AliTRDgeometry::fgkRmin = 294.0;
155 const Float_t AliTRDgeometry::fgkRmax = 368.0;
157 // Upper and lower length of the mother volumes
158 const Float_t AliTRDgeometry::fgkZmax1 = 378.35;
159 const Float_t AliTRDgeometry::fgkZmax2 = 302.0;
161 // Parameter of the BTR mother volumes
162 const Float_t AliTRDgeometry::fgkSheight = 74.0;
163 const Float_t AliTRDgeometry::fgkSwidth1 = 99.613;
164 const Float_t AliTRDgeometry::fgkSwidth2 = 125.707;
165 const Float_t AliTRDgeometry::fgkSlenTR1 = 751.0;
166 const Float_t AliTRDgeometry::fgkSlenTR2 = 313.5;
167 const Float_t AliTRDgeometry::fgkSlenTR3 = 159.5;
169 // Height of different chamber parts
171 const Float_t AliTRDgeometry::fgkCraH = 4.8;
173 const Float_t AliTRDgeometry::fgkCdrH = 3.0;
174 // Amplification region
175 const Float_t AliTRDgeometry::fgkCamH = 0.7;
177 const Float_t AliTRDgeometry::fgkCroH = 2.0;
179 const Float_t AliTRDgeometry::fgkCH = AliTRDgeometry::fgkCraH
180 + AliTRDgeometry::fgkCdrH
181 + AliTRDgeometry::fgkCamH
182 + AliTRDgeometry::fgkCroH;
184 // Vertical spacing of the chambers
185 const Float_t AliTRDgeometry::fgkVspace = 2.1;
187 // Horizontal spacing of the chambers
188 const Float_t AliTRDgeometry::fgkHspace = 2.0;
190 // Thicknesses of different parts of the chamber frame
191 // Lower aluminum frame
192 const Float_t AliTRDgeometry::fgkCalT = 0.3;
193 // Lower G10 frame sides
194 const Float_t AliTRDgeometry::fgkCclsT = 0.3;
195 // Lower G10 frame front
196 const Float_t AliTRDgeometry::fgkCclfT = 1.0;
198 const Float_t AliTRDgeometry::fgkCcuT = 0.9;
200 const Float_t AliTRDgeometry::fgkCauT = 1.5;
202 // Additional width of the readout chamber frames
203 const Float_t AliTRDgeometry::fgkCroW = 0.9;
205 // Difference of outer chamber width and pad plane width
206 const Float_t AliTRDgeometry::fgkCpadW = 1.0;
207 const Float_t AliTRDgeometry::fgkRpadW = 1.0;
210 // Thickness of the the material layers
212 const Float_t AliTRDgeometry::fgkRaThick = 0.3646;
213 const Float_t AliTRDgeometry::fgkMyThick = 0.005;
214 const Float_t AliTRDgeometry::fgkDrThick = AliTRDgeometry::fgkCdrH;
215 const Float_t AliTRDgeometry::fgkAmThick = AliTRDgeometry::fgkCamH;
216 const Float_t AliTRDgeometry::fgkXeThick = AliTRDgeometry::fgkDrThick
217 + AliTRDgeometry::fgkAmThick;
218 const Float_t AliTRDgeometry::fgkCuThick = 0.001;
219 const Float_t AliTRDgeometry::fgkSuThick = 0.06;
220 const Float_t AliTRDgeometry::fgkFeThick = 0.0044;
221 const Float_t AliTRDgeometry::fgkCoThick = 0.02;
222 const Float_t AliTRDgeometry::fgkWaThick = 0.02;
225 // Position of the material layers
227 const Float_t AliTRDgeometry::fgkRaZpos = -1.50;
228 const Float_t AliTRDgeometry::fgkMyZpos = 0.895;
229 const Float_t AliTRDgeometry::fgkDrZpos = 2.4;
230 const Float_t AliTRDgeometry::fgkAmZpos = 0.0;
231 const Float_t AliTRDgeometry::fgkCuZpos = -0.9995;
232 const Float_t AliTRDgeometry::fgkSuZpos = 0.0000;
233 const Float_t AliTRDgeometry::fgkFeZpos = 0.0322;
234 const Float_t AliTRDgeometry::fgkCoZpos = 0.97;
235 const Float_t AliTRDgeometry::fgkWaZpos = 0.99;
237 //_____________________________________________________________________________
238 AliTRDgeometry::AliTRDgeometry():AliGeometry()
241 // AliTRDgeometry default constructor
248 //_____________________________________________________________________________
249 AliTRDgeometry::~AliTRDgeometry()
252 // AliTRDgeometry destructor
257 //_____________________________________________________________________________
258 void AliTRDgeometry::Init()
261 // Initializes the geometry parameter
263 // The maximum number of pads
264 // and the position of pad 0,0,0
266 // chambers seen from the top:
267 // +----------------------------+
273 // +----------------------------+ +------>
275 // chambers seen from the side: ^
276 // +----------------------------+ drift|
279 // +----------------------------+ +------>
282 // IMPORTANT: time bin 0 is now the first one in the drift region
283 // closest to the readout !!!
290 // The outer width of the chambers
298 // The outer lengths of the chambers
299 Float_t length[kNplan][kNcham] = { { 124.0, 124.0, 110.0, 124.0, 124.0 }
300 , { 131.0, 131.0, 110.0, 131.0, 131.0 }
301 , { 138.0, 138.0, 110.0, 138.0, 138.0 }
302 , { 145.0, 145.0, 110.0, 145.0, 145.0 }
303 , { 147.0, 147.0, 110.0, 147.0, 147.0 }
304 , { 147.0, 147.0, 110.0, 147.0, 147.0 } };
306 for (icham = 0; icham < kNcham; icham++) {
307 for (iplan = 0; iplan < kNplan; iplan++) {
308 fClength[iplan][icham] = length[iplan][icham];
309 fClengthPH[iplan][icham] = 0.0;
310 fClengthRH[iplan][icham] = 0.0;
314 // The rotation matrix elements
316 for (isect = 0; isect < fgkNsect; isect++) {
317 phi = -2.0 * TMath::Pi() / (Float_t) fgkNsect * ((Float_t) isect + 0.5);
318 fRotA11[isect] = TMath::Cos(phi);
319 fRotA12[isect] = TMath::Sin(phi);
320 fRotA21[isect] = TMath::Sin(phi);
321 fRotA22[isect] = TMath::Cos(phi);
323 fRotB11[isect] = TMath::Cos(phi);
324 fRotB12[isect] = TMath::Sin(phi);
325 fRotB21[isect] = TMath::Sin(phi);
326 fRotB22[isect] = TMath::Cos(phi);
331 //_____________________________________________________________________________
332 void AliTRDgeometry::CreateGeometry(Int_t *idtmed)
335 // Create TRD geometry
340 //_____________________________________________________________________________
341 Bool_t AliTRDgeometry::Local2Global(Int_t idet, Float_t *local
343 , AliTRDparameter *par) const
346 // Converts local pad-coordinates (row,col,time) into
347 // global ALICE reference frame coordinates (x,y,z)
350 Int_t icham = GetChamber(idet); // Chamber info (0-4)
351 Int_t isect = GetSector(idet); // Sector info (0-17)
352 Int_t iplan = GetPlane(idet); // Plane info (0-5)
354 return Local2Global(iplan,icham,isect,local,global,par);
358 //_____________________________________________________________________________
359 Bool_t AliTRDgeometry::Local2Global(Int_t iplan, Int_t icham, Int_t isect
360 , Float_t *local, Float_t *global
361 , AliTRDparameter *par) const
364 // Converts local pad-coordinates (row,col,time) into
365 // global ALICE reference frame coordinates (x,y,z)
369 Error("Local2Global","No parameter defined\n");
373 Int_t idet = GetDetector(iplan,icham,isect); // Detector number
375 Float_t padRow = local[0]+0.5; // Pad Row position
376 Float_t padCol = local[1]+0.5; // Pad Column position
377 Float_t timeSlice = local[2]+0.5; // Time "position"
379 Float_t row0 = par->GetRow0(iplan,icham,isect);
380 Float_t col0 = par->GetCol0(iplan);
381 Float_t time0 = par->GetTime0(iplan);
385 // calculate (x,y,z) position in rotated chamber
386 rot[0] = time0 - (timeSlice - par->GetTimeBefore())
387 * par->GetTimeBinSize();
388 rot[1] = col0 + padCol
389 * par->GetColPadSize(iplan);
390 rot[2] = row0 + padRow
391 * par->GetRowPadSize(iplan,icham,isect);
393 // Rotate back to original position
394 return RotateBack(idet,rot,global);
398 //_____________________________________________________________________________
399 Bool_t AliTRDgeometry::Rotate(Int_t d, Float_t *pos, Float_t *rot) const
402 // Rotates all chambers in the position of sector 0 and transforms
403 // the coordinates in the ALICE restframe <pos> into the
404 // corresponding local frame <rot>.
407 Int_t sector = GetSector(d);
409 rot[0] = pos[0] * fRotA11[sector] + pos[1] * fRotA12[sector];
410 rot[1] = -pos[0] * fRotA21[sector] + pos[1] * fRotA22[sector];
417 //_____________________________________________________________________________
418 Bool_t AliTRDgeometry::RotateBack(Int_t d, Float_t *rot, Float_t *pos) const
421 // Rotates a chambers from the position of sector 0 into its
422 // original position and transforms the corresponding local frame
423 // coordinates <rot> into the coordinates of the ALICE restframe <pos>.
426 Int_t sector = GetSector(d);
428 pos[0] = rot[0] * fRotB11[sector] + rot[1] * fRotB12[sector];
429 pos[1] = -rot[0] * fRotB21[sector] + rot[1] * fRotB22[sector];
436 //_____________________________________________________________________________
437 Int_t AliTRDgeometry::GetDetectorSec(const Int_t p, const Int_t c) const
440 // Convert plane / chamber into detector number for one single sector
443 return (p + c * fgkNplan);
447 //_____________________________________________________________________________
448 Int_t AliTRDgeometry::GetDetector(const Int_t p, const Int_t c, const Int_t s) const
451 // Convert plane / chamber / sector into detector number
454 return (p + c * fgkNplan + s * fgkNplan * fgkNcham);
458 //_____________________________________________________________________________
459 Int_t AliTRDgeometry::GetPlane(const Int_t d) const
462 // Reconstruct the plane number from the detector number
465 return ((Int_t) (d % fgkNplan));
469 //_____________________________________________________________________________
470 Int_t AliTRDgeometry::GetChamber(const Int_t d) const
473 // Reconstruct the chamber number from the detector number
476 return ((Int_t) (d % (fgkNplan * fgkNcham)) / fgkNplan);
480 //_____________________________________________________________________________
481 Int_t AliTRDgeometry::GetSector(const Int_t d) const
484 // Reconstruct the sector number from the detector number
487 return ((Int_t) (d / (fgkNplan * fgkNcham)));
491 //_____________________________________________________________________________
492 void AliTRDgeometry::SetOldGeometry()
495 // Use the old chamber lengths
501 Float_t length[kNplan][kNcham] = { { 123.5, 123.5, 110.0, 123.5, 123.5 }
502 , { 131.0, 131.0, 110.0, 131.0, 131.0 }
503 , { 134.5, 138.5, 110.0, 138.5, 134.5 }
504 , { 142.0, 146.0, 110.0, 146.0, 142.0 }
505 , { 142.0, 153.0, 110.0, 153.0, 142.0 }
506 , { 134.0, 160.5, 110.0, 160.5, 134.0 } };
508 for (icham = 0; icham < kNcham; icham++) {
509 for (iplan = 0; iplan < kNplan; iplan++) {
510 fClength[iplan][icham] = length[iplan][icham];