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 1.21 2002/11/21 16:09:44 cblume
19 Change fgkRpadW to 1.0 cm for new pad plane
21 Revision 1.20 2002/10/31 17:45:35 cblume
24 Revision 1.19 2002/10/14 14:57:43 hristov
25 Merging the VirtualMC branch to the main development branch (HEAD)
27 Revision 1.15.6.2 2002/07/24 10:09:30 alibrary
30 Revision 1.15.6.1 2002/06/10 15:28:58 hristov
33 Revision 1.17 2002/04/05 13:20:12 cblume
34 Remove const for CreateGeometry
36 Revision 1.16 2002/03/28 14:59:07 cblume
39 Revision 1.18 2002/06/12 09:54:35 cblume
40 Update of tracking code provided by Sergei
42 Revision 1.17 2002/04/05 13:20:12 cblume
43 Remove const for CreateGeometry
45 Revision 1.16 2002/03/28 14:59:07 cblume
48 Revision 1.15 2002/02/11 14:21:16 cblume
49 Update of the geometry. Get rid of MANY
51 Revision 1.14 2001/11/06 17:19:41 cblume
52 Add detailed geometry and simple simulator
54 Revision 1.13 2001/08/02 08:30:45 cblume
55 Fix positions of cooling material
57 Revision 1.12 2001/05/21 16:45:47 hristov
58 Last minute changes (C.Blume)
60 Revision 1.11 2001/05/11 07:56:12 hristov
61 Consistent declarations needed on Alpha
63 Revision 1.10 2001/05/07 08:08:05 cblume
66 Revision 1.9 2001/03/27 12:48:33 cblume
67 Correct for volume overlaps
69 Revision 1.8 2001/03/13 09:30:35 cblume
70 Update of digitization. Moved digit branch definition to AliTRD
72 Revision 1.7 2001/02/14 18:22:26 cblume
73 Change in the geometry of the padplane
75 Revision 1.6 2000/11/01 14:53:20 cblume
76 Merge with TRD-develop
78 Revision 1.1.4.7 2000/10/16 01:16:53 cblume
79 Changed timebin 0 to be the one closest to the readout
81 Revision 1.1.4.6 2000/10/15 23:35:57 cblume
82 Include geometry constants as static member
84 Revision 1.1.4.5 2000/10/06 16:49:46 cblume
87 Revision 1.1.4.4 2000/10/04 16:34:58 cblume
88 Replace include files by forward declarations
90 Revision 1.1.4.3 2000/09/22 14:43:40 cblume
91 Allow the pad/timebin-dimensions to be changed after initialization
93 Revision 1.1.4.2 2000/09/18 13:37:01 cblume
94 Minor coding corrections
96 Revision 1.5 2000/10/02 21:28:19 fca
97 Removal of useless dependecies via forward declarations
99 Revision 1.4 2000/06/08 18:32:58 cblume
100 Make code compliant to coding conventions
102 Revision 1.3 2000/06/07 16:25:37 cblume
103 Try to remove compiler warnings on Sun and HP
105 Revision 1.2 2000/05/08 16:17:27 cblume
108 Revision 1.1.4.1 2000/05/08 14:45:55 cblume
109 Bug fix in RotateBack(). Geometry update
111 Revision 1.4 2000/06/08 18:32:58 cblume
112 Make code compliant to coding conventions
114 Revision 1.3 2000/06/07 16:25:37 cblume
115 Try to remove compiler warnings on Sun and HP
117 Revision 1.2 2000/05/08 16:17:27 cblume
120 Revision 1.1.4.1 2000/05/08 14:45:55 cblume
121 Bug fix in RotateBack(). Geometry update
123 Revision 1.1 2000/02/28 19:00:44 cblume
128 ///////////////////////////////////////////////////////////////////////////////
130 // TRD geometry class //
132 ///////////////////////////////////////////////////////////////////////////////
135 #include "AliTRDgeometry.h"
136 #include "AliTRDparameter.h"
138 ClassImp(AliTRDgeometry)
140 //_____________________________________________________________________________
143 // The geometry constants
145 const Int_t AliTRDgeometry::fgkNsect = kNsect;
146 const Int_t AliTRDgeometry::fgkNplan = kNplan;
147 const Int_t AliTRDgeometry::fgkNcham = kNcham;
148 const Int_t AliTRDgeometry::fgkNdet = kNdet;
151 // Dimensions of the detector
154 // Inner and outer radius of the mother volumes
155 const Float_t AliTRDgeometry::fgkRmin = 294.0;
156 const Float_t AliTRDgeometry::fgkRmax = 368.0;
158 // Upper and lower length of the mother volumes
159 const Float_t AliTRDgeometry::fgkZmax1 = 378.35;
160 const Float_t AliTRDgeometry::fgkZmax2 = 302.0;
162 // Parameter of the BTR mother volumes
163 const Float_t AliTRDgeometry::fgkSheight = 74.0;
164 const Float_t AliTRDgeometry::fgkSwidth1 = 99.613;
165 const Float_t AliTRDgeometry::fgkSwidth2 = 125.707;
166 const Float_t AliTRDgeometry::fgkSlenTR1 = 751.0;
167 const Float_t AliTRDgeometry::fgkSlenTR2 = 313.5;
168 const Float_t AliTRDgeometry::fgkSlenTR3 = 159.5;
170 // Height of different chamber parts
172 const Float_t AliTRDgeometry::fgkCraH = 4.8;
174 const Float_t AliTRDgeometry::fgkCdrH = 3.0;
175 // Amplification region
176 const Float_t AliTRDgeometry::fgkCamH = 0.7;
178 const Float_t AliTRDgeometry::fgkCroH = 2.0;
180 const Float_t AliTRDgeometry::fgkCH = AliTRDgeometry::fgkCraH
181 + AliTRDgeometry::fgkCdrH
182 + AliTRDgeometry::fgkCamH
183 + AliTRDgeometry::fgkCroH;
185 // Vertical spacing of the chambers
186 const Float_t AliTRDgeometry::fgkVspace = 2.1;
188 // Horizontal spacing of the chambers
189 const Float_t AliTRDgeometry::fgkHspace = 2.0;
191 // Thicknesses of different parts of the chamber frame
192 // Lower aluminum frame
193 const Float_t AliTRDgeometry::fgkCalT = 0.3;
194 // Lower G10 frame sides
195 const Float_t AliTRDgeometry::fgkCclsT = 0.3;
196 // Lower G10 frame front
197 const Float_t AliTRDgeometry::fgkCclfT = 1.0;
199 const Float_t AliTRDgeometry::fgkCcuT = 0.9;
201 const Float_t AliTRDgeometry::fgkCauT = 1.5;
203 // Additional width of the readout chamber frames
204 const Float_t AliTRDgeometry::fgkCroW = 0.9;
206 // Difference of outer chamber width and pad plane width
207 const Float_t AliTRDgeometry::fgkCpadW = 1.0;
208 const Float_t AliTRDgeometry::fgkRpadW = 1.0;
211 // Thickness of the the material layers
213 const Float_t AliTRDgeometry::fgkRaThick = 0.3646;
214 const Float_t AliTRDgeometry::fgkMyThick = 0.005;
215 const Float_t AliTRDgeometry::fgkDrThick = AliTRDgeometry::fgkCdrH;
216 const Float_t AliTRDgeometry::fgkAmThick = AliTRDgeometry::fgkCamH;
217 const Float_t AliTRDgeometry::fgkXeThick = AliTRDgeometry::fgkDrThick
218 + AliTRDgeometry::fgkAmThick;
219 const Float_t AliTRDgeometry::fgkCuThick = 0.001;
220 const Float_t AliTRDgeometry::fgkSuThick = 0.06;
221 const Float_t AliTRDgeometry::fgkFeThick = 0.0044;
222 const Float_t AliTRDgeometry::fgkCoThick = 0.02;
223 const Float_t AliTRDgeometry::fgkWaThick = 0.02;
226 // Position of the material layers
228 const Float_t AliTRDgeometry::fgkRaZpos = -1.50;
229 const Float_t AliTRDgeometry::fgkMyZpos = 0.895;
230 const Float_t AliTRDgeometry::fgkDrZpos = 2.4;
231 const Float_t AliTRDgeometry::fgkAmZpos = 0.0;
232 const Float_t AliTRDgeometry::fgkCuZpos = -0.9995;
233 const Float_t AliTRDgeometry::fgkSuZpos = 0.0000;
234 const Float_t AliTRDgeometry::fgkFeZpos = 0.0322;
235 const Float_t AliTRDgeometry::fgkCoZpos = 0.97;
236 const Float_t AliTRDgeometry::fgkWaZpos = 0.99;
238 //_____________________________________________________________________________
239 AliTRDgeometry::AliTRDgeometry():AliGeometry()
242 // AliTRDgeometry default constructor
249 //_____________________________________________________________________________
250 AliTRDgeometry::~AliTRDgeometry()
253 // AliTRDgeometry destructor
258 //_____________________________________________________________________________
259 void AliTRDgeometry::Init()
262 // Initializes the geometry parameter
264 // The maximum number of pads
265 // and the position of pad 0,0,0
267 // chambers seen from the top:
268 // +----------------------------+
274 // +----------------------------+ +------>
276 // chambers seen from the side: ^
277 // +----------------------------+ drift|
280 // +----------------------------+ +------>
283 // IMPORTANT: time bin 0 is now the first one in the drift region
284 // closest to the readout !!!
291 // The outer width of the chambers
299 // The outer lengths of the chambers
300 Float_t length[kNplan][kNcham] = { { 124.0, 124.0, 110.0, 124.0, 124.0 }
301 , { 131.0, 131.0, 110.0, 131.0, 131.0 }
302 , { 138.0, 138.0, 110.0, 138.0, 138.0 }
303 , { 145.0, 145.0, 110.0, 145.0, 145.0 }
304 , { 147.0, 147.0, 110.0, 147.0, 147.0 }
305 , { 147.0, 147.0, 110.0, 147.0, 147.0 } };
307 for (icham = 0; icham < kNcham; icham++) {
308 for (iplan = 0; iplan < kNplan; iplan++) {
309 fClength[iplan][icham] = length[iplan][icham];
310 fClengthPH[iplan][icham] = 0.0;
311 fClengthRH[iplan][icham] = 0.0;
315 // The rotation matrix elements
317 for (isect = 0; isect < fgkNsect; isect++) {
318 phi = -2.0 * TMath::Pi() / (Float_t) fgkNsect * ((Float_t) isect + 0.5);
319 fRotA11[isect] = TMath::Cos(phi);
320 fRotA12[isect] = TMath::Sin(phi);
321 fRotA21[isect] = TMath::Sin(phi);
322 fRotA22[isect] = TMath::Cos(phi);
324 fRotB11[isect] = TMath::Cos(phi);
325 fRotB12[isect] = TMath::Sin(phi);
326 fRotB21[isect] = TMath::Sin(phi);
327 fRotB22[isect] = TMath::Cos(phi);
332 //_____________________________________________________________________________
333 void AliTRDgeometry::CreateGeometry(Int_t *idtmed)
336 // Create TRD geometry
341 //_____________________________________________________________________________
342 Bool_t AliTRDgeometry::Local2Global(Int_t idet, Float_t *local
344 , AliTRDparameter *par) const
347 // Converts local pad-coordinates (row,col,time) into
348 // global ALICE reference frame coordinates (x,y,z)
351 Int_t icham = GetChamber(idet); // Chamber info (0-4)
352 Int_t isect = GetSector(idet); // Sector info (0-17)
353 Int_t iplan = GetPlane(idet); // Plane info (0-5)
355 return Local2Global(iplan,icham,isect,local,global,par);
359 //_____________________________________________________________________________
360 Bool_t AliTRDgeometry::Local2Global(Int_t iplan, Int_t icham, Int_t isect
361 , Float_t *local, Float_t *global
362 , AliTRDparameter *par) const
365 // Converts local pad-coordinates (row,col,time) into
366 // global ALICE reference frame coordinates (x,y,z)
370 Error("Local2Global","No parameter defined\n");
374 Int_t idet = GetDetector(iplan,icham,isect); // Detector number
376 Float_t padRow = local[0]+0.5; // Pad Row position
377 Float_t padCol = local[1]+0.5; // Pad Column position
378 Float_t timeSlice = local[2]+0.5; // Time "position"
380 Float_t row0 = par->GetRow0(iplan,icham,isect);
381 Float_t col0 = par->GetCol0(iplan);
382 Float_t time0 = par->GetTime0(iplan);
386 // calculate (x,y,z) position in rotated chamber
387 rot[0] = time0 - (timeSlice - par->GetTimeBefore())
388 * par->GetTimeBinSize();
389 rot[1] = col0 + padCol
390 * par->GetColPadSize(iplan);
391 rot[2] = row0 + padRow
392 * par->GetRowPadSize(iplan,icham,isect);
394 // Rotate back to original position
395 return RotateBack(idet,rot,global);
399 //_____________________________________________________________________________
400 Bool_t AliTRDgeometry::Rotate(Int_t d, Float_t *pos, Float_t *rot) const
403 // Rotates all chambers in the position of sector 0 and transforms
404 // the coordinates in the ALICE restframe <pos> into the
405 // corresponding local frame <rot>.
408 Int_t sector = GetSector(d);
410 rot[0] = pos[0] * fRotA11[sector] + pos[1] * fRotA12[sector];
411 rot[1] = -pos[0] * fRotA21[sector] + pos[1] * fRotA22[sector];
418 //_____________________________________________________________________________
419 Bool_t AliTRDgeometry::RotateBack(Int_t d, Float_t *rot, Float_t *pos) const
422 // Rotates a chambers from the position of sector 0 into its
423 // original position and transforms the corresponding local frame
424 // coordinates <rot> into the coordinates of the ALICE restframe <pos>.
427 Int_t sector = GetSector(d);
429 pos[0] = rot[0] * fRotB11[sector] + rot[1] * fRotB12[sector];
430 pos[1] = -rot[0] * fRotB21[sector] + rot[1] * fRotB22[sector];
437 //_____________________________________________________________________________
438 Int_t AliTRDgeometry::GetDetectorSec(const Int_t p, const Int_t c) const
441 // Convert plane / chamber into detector number for one single sector
444 return (p + c * fgkNplan);
448 //_____________________________________________________________________________
449 Int_t AliTRDgeometry::GetDetector(const Int_t p, const Int_t c, const Int_t s) const
452 // Convert plane / chamber / sector into detector number
455 return (p + c * fgkNplan + s * fgkNplan * fgkNcham);
459 //_____________________________________________________________________________
460 Int_t AliTRDgeometry::GetPlane(const Int_t d) const
463 // Reconstruct the plane number from the detector number
466 return ((Int_t) (d % fgkNplan));
470 //_____________________________________________________________________________
471 Int_t AliTRDgeometry::GetChamber(const Int_t d) const
474 // Reconstruct the chamber number from the detector number
477 return ((Int_t) (d % (fgkNplan * fgkNcham)) / fgkNplan);
481 //_____________________________________________________________________________
482 Int_t AliTRDgeometry::GetSector(const Int_t d) const
485 // Reconstruct the sector number from the detector number
488 return ((Int_t) (d / (fgkNplan * fgkNcham)));
492 //_____________________________________________________________________________
493 void AliTRDgeometry::SetOldGeometry()
496 // Use the old chamber lengths
502 Float_t length[kNplan][kNcham] = { { 123.5, 123.5, 110.0, 123.5, 123.5 }
503 , { 131.0, 131.0, 110.0, 131.0, 131.0 }
504 , { 134.5, 138.5, 110.0, 138.5, 134.5 }
505 , { 142.0, 146.0, 110.0, 146.0, 142.0 }
506 , { 142.0, 153.0, 110.0, 153.0, 142.0 }
507 , { 134.0, 160.5, 110.0, 160.5, 134.0 } };
509 for (icham = 0; icham < kNcham; icham++) {
510 for (iplan = 0; iplan < kNplan; iplan++) {
511 fClength[iplan][icham] = length[iplan][icham];