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 2002/04/05 13:20:12 cblume
19 Remove const for CreateGeometry
21 Revision 1.16 2002/03/28 14:59:07 cblume
24 Revision 1.15 2002/02/11 14:21:16 cblume
25 Update of the geometry. Get rid of MANY
27 Revision 1.14 2001/11/06 17:19:41 cblume
28 Add detailed geometry and simple simulator
30 Revision 1.13 2001/08/02 08:30:45 cblume
31 Fix positions of cooling material
33 Revision 1.12 2001/05/21 16:45:47 hristov
34 Last minute changes (C.Blume)
36 Revision 1.11 2001/05/11 07:56:12 hristov
37 Consistent declarations needed on Alpha
39 Revision 1.10 2001/05/07 08:08:05 cblume
42 Revision 1.9 2001/03/27 12:48:33 cblume
43 Correct for volume overlaps
45 Revision 1.8 2001/03/13 09:30:35 cblume
46 Update of digitization. Moved digit branch definition to AliTRD
48 Revision 1.7 2001/02/14 18:22:26 cblume
49 Change in the geometry of the padplane
51 Revision 1.6 2000/11/01 14:53:20 cblume
52 Merge with TRD-develop
54 Revision 1.1.4.7 2000/10/16 01:16:53 cblume
55 Changed timebin 0 to be the one closest to the readout
57 Revision 1.1.4.6 2000/10/15 23:35:57 cblume
58 Include geometry constants as static member
60 Revision 1.1.4.5 2000/10/06 16:49:46 cblume
63 Revision 1.1.4.4 2000/10/04 16:34:58 cblume
64 Replace include files by forward declarations
66 Revision 1.1.4.3 2000/09/22 14:43:40 cblume
67 Allow the pad/timebin-dimensions to be changed after initialization
69 Revision 1.1.4.2 2000/09/18 13:37:01 cblume
70 Minor coding corrections
72 Revision 1.5 2000/10/02 21:28:19 fca
73 Removal of useless dependecies via forward declarations
75 Revision 1.4 2000/06/08 18:32:58 cblume
76 Make code compliant to coding conventions
78 Revision 1.3 2000/06/07 16:25:37 cblume
79 Try to remove compiler warnings on Sun and HP
81 Revision 1.2 2000/05/08 16:17:27 cblume
84 Revision 1.1.4.1 2000/05/08 14:45:55 cblume
85 Bug fix in RotateBack(). Geometry update
87 Revision 1.4 2000/06/08 18:32:58 cblume
88 Make code compliant to coding conventions
90 Revision 1.3 2000/06/07 16:25:37 cblume
91 Try to remove compiler warnings on Sun and HP
93 Revision 1.2 2000/05/08 16:17:27 cblume
96 Revision 1.1.4.1 2000/05/08 14:45:55 cblume
97 Bug fix in RotateBack(). Geometry update
99 Revision 1.1 2000/02/28 19:00:44 cblume
104 ///////////////////////////////////////////////////////////////////////////////
106 // TRD geometry class //
108 ///////////////////////////////////////////////////////////////////////////////
112 #include "AliTRDgeometry.h"
113 #include "AliTRDparameter.h"
116 ClassImp(AliTRDgeometry)
118 //_____________________________________________________________________________
121 // The geometry constants
123 const Int_t AliTRDgeometry::fgkNsect = kNsect;
124 const Int_t AliTRDgeometry::fgkNplan = kNplan;
125 const Int_t AliTRDgeometry::fgkNcham = kNcham;
126 const Int_t AliTRDgeometry::fgkNdet = kNdet;
129 // Dimensions of the detector
132 // Inner and outer radius of the mother volumes
133 const Float_t AliTRDgeometry::fgkRmin = 294.0;
134 const Float_t AliTRDgeometry::fgkRmax = 368.0;
136 // Upper and lower length of the mother volumes
137 const Float_t AliTRDgeometry::fgkZmax1 = 378.35;
138 const Float_t AliTRDgeometry::fgkZmax2 = 302.0;
140 // Parameter of the BTR mother volumes
141 const Float_t AliTRDgeometry::fgkSheight = 74.0;
142 const Float_t AliTRDgeometry::fgkSwidth1 = 99.613;
143 const Float_t AliTRDgeometry::fgkSwidth2 = 125.707;
144 const Float_t AliTRDgeometry::fgkSlenTR1 = 751.0;
145 const Float_t AliTRDgeometry::fgkSlenTR2 = 313.5;
146 const Float_t AliTRDgeometry::fgkSlenTR3 = 159.5;
148 // Height of different chamber parts
150 const Float_t AliTRDgeometry::fgkCraH = 4.8;
152 const Float_t AliTRDgeometry::fgkCdrH = 3.0;
153 // Amplification region
154 const Float_t AliTRDgeometry::fgkCamH = 0.7;
156 const Float_t AliTRDgeometry::fgkCroH = 2.0;
158 const Float_t AliTRDgeometry::fgkCH = AliTRDgeometry::fgkCraH
159 + AliTRDgeometry::fgkCdrH
160 + AliTRDgeometry::fgkCamH
161 + AliTRDgeometry::fgkCroH;
163 // Vertical spacing of the chambers
164 const Float_t AliTRDgeometry::fgkVspace = 2.1;
166 // Horizontal spacing of the chambers
167 const Float_t AliTRDgeometry::fgkHspace = 2.0;
169 // Thicknesses of different parts of the chamber frame
170 // Lower aluminum frame
171 const Float_t AliTRDgeometry::fgkCalT = 0.3;
172 // Lower G10 frame sides
173 const Float_t AliTRDgeometry::fgkCclsT = 0.3;
174 // Lower G10 frame front
175 const Float_t AliTRDgeometry::fgkCclfT = 1.0;
177 const Float_t AliTRDgeometry::fgkCcuT = 0.9;
179 const Float_t AliTRDgeometry::fgkCauT = 1.5;
181 // Additional width of the readout chamber frames
182 const Float_t AliTRDgeometry::fgkCroW = 0.9;
184 // Difference of outer chamber width and pad plane width
185 const Float_t AliTRDgeometry::fgkCpadW = 1.0;
186 const Float_t AliTRDgeometry::fgkRpadW = 1.5;
189 // Thickness of the the material layers
191 const Float_t AliTRDgeometry::fgkRaThick = 0.3646;
192 const Float_t AliTRDgeometry::fgkMyThick = 0.005;
193 const Float_t AliTRDgeometry::fgkDrThick = AliTRDgeometry::fgkCdrH;
194 const Float_t AliTRDgeometry::fgkAmThick = AliTRDgeometry::fgkCamH;
195 const Float_t AliTRDgeometry::fgkXeThick = AliTRDgeometry::fgkDrThick
196 + AliTRDgeometry::fgkAmThick;
197 const Float_t AliTRDgeometry::fgkCuThick = 0.001;
198 const Float_t AliTRDgeometry::fgkSuThick = 0.06;
199 const Float_t AliTRDgeometry::fgkFeThick = 0.0044;
200 const Float_t AliTRDgeometry::fgkCoThick = 0.02;
201 const Float_t AliTRDgeometry::fgkWaThick = 0.02;
204 // Position of the material layers
206 const Float_t AliTRDgeometry::fgkRaZpos = -1.50;
207 const Float_t AliTRDgeometry::fgkMyZpos = 0.895;
208 const Float_t AliTRDgeometry::fgkDrZpos = 2.4;
209 const Float_t AliTRDgeometry::fgkAmZpos = 0.0;
210 const Float_t AliTRDgeometry::fgkCuZpos = -0.9995;
211 const Float_t AliTRDgeometry::fgkSuZpos = 0.0000;
212 const Float_t AliTRDgeometry::fgkFeZpos = 0.0322;
213 const Float_t AliTRDgeometry::fgkCoZpos = 0.97;
214 const Float_t AliTRDgeometry::fgkWaZpos = 0.99;
216 //_____________________________________________________________________________
217 AliTRDgeometry::AliTRDgeometry():AliGeometry()
220 // AliTRDgeometry default constructor
227 //_____________________________________________________________________________
228 AliTRDgeometry::~AliTRDgeometry()
231 // AliTRDgeometry destructor
236 //_____________________________________________________________________________
237 void AliTRDgeometry::Init()
240 // Initializes the geometry parameter
242 // The maximum number of pads
243 // and the position of pad 0,0,0
245 // chambers seen from the top:
246 // +----------------------------+
252 // +----------------------------+ +------>
254 // chambers seen from the side: ^
255 // +----------------------------+ drift|
258 // +----------------------------+ +------>
261 // IMPORTANT: time bin 0 is now the first one in the drift region
262 // closest to the readout !!!
269 // The outer width of the chambers
277 // The outer lengths of the chambers
278 Float_t length[kNplan][kNcham] = { { 123.5, 123.5, 110.0, 123.5, 123.5 }
279 , { 131.0, 131.0, 110.0, 131.0, 131.0 }
280 , { 134.5, 138.5, 110.0, 138.5, 134.5 }
281 , { 142.0, 146.0, 110.0, 146.0, 142.0 }
282 , { 142.0, 153.0, 110.0, 153.0, 142.0 }
283 , { 134.0, 160.5, 110.0, 160.5, 134.0 } };
285 for (icham = 0; icham < kNcham; icham++) {
286 for (iplan = 0; iplan < kNplan; iplan++) {
287 fClength[iplan][icham] = length[iplan][icham];
288 fClengthPH[iplan][icham] = 0.0;
289 fClengthRH[iplan][icham] = 0.0;
293 // The rotation matrix elements
295 for (isect = 0; isect < fgkNsect; isect++) {
296 phi = -2.0 * TMath::Pi() / (Float_t) fgkNsect * ((Float_t) isect + 0.5);
297 fRotA11[isect] = TMath::Cos(phi);
298 fRotA12[isect] = TMath::Sin(phi);
299 fRotA21[isect] = TMath::Sin(phi);
300 fRotA22[isect] = TMath::Cos(phi);
302 fRotB11[isect] = TMath::Cos(phi);
303 fRotB12[isect] = TMath::Sin(phi);
304 fRotB21[isect] = TMath::Sin(phi);
305 fRotB22[isect] = TMath::Cos(phi);
310 //_____________________________________________________________________________
311 void AliTRDgeometry::CreateGeometry(Int_t *idtmed)
314 // Create TRD geometry
319 //_____________________________________________________________________________
320 Bool_t AliTRDgeometry::Local2Global(Int_t idet, Float_t *local
322 , AliTRDparameter *par) const
325 // Converts local pad-coordinates (row,col,time) into
326 // global ALICE reference frame coordinates (x,y,z)
329 Int_t icham = GetChamber(idet); // Chamber info (0-4)
330 Int_t isect = GetSector(idet); // Sector info (0-17)
331 Int_t iplan = GetPlane(idet); // Plane info (0-5)
333 return Local2Global(iplan,icham,isect,local,global,par);
337 //_____________________________________________________________________________
338 Bool_t AliTRDgeometry::Local2Global(Int_t iplan, Int_t icham, Int_t isect
339 , Float_t *local, Float_t *global
340 , AliTRDparameter *par) const
343 // Converts local pad-coordinates (row,col,time) into
344 // global ALICE reference frame coordinates (x,y,z)
348 Error("Local2Global","No parameter defined\n");
352 Int_t idet = GetDetector(iplan,icham,isect); // Detector number
354 Float_t padRow = local[0]+0.5; // Pad Row position
355 Float_t padCol = local[1]+0.5; // Pad Column position
356 Float_t timeSlice = local[2]+0.5; // Time "position"
358 Float_t row0 = par->GetRow0(iplan,icham,isect);
359 Float_t col0 = par->GetCol0(iplan);
360 Float_t time0 = par->GetTime0(iplan);
364 // calculate (x,y,z) position in rotated chamber
365 rot[0] = time0 - (timeSlice - par->GetTimeBefore())
366 * par->GetTimeBinSize();
367 rot[1] = col0 + padCol
368 * par->GetColPadSize(iplan);
369 rot[2] = row0 + padRow
370 * par->GetRowPadSize(iplan,icham,isect);
372 // Rotate back to original position
373 return RotateBack(idet,rot,global);
377 //_____________________________________________________________________________
378 Bool_t AliTRDgeometry::Rotate(Int_t d, Float_t *pos, Float_t *rot) const
381 // Rotates all chambers in the position of sector 0 and transforms
382 // the coordinates in the ALICE restframe <pos> into the
383 // corresponding local frame <rot>.
386 Int_t sector = GetSector(d);
388 rot[0] = pos[0] * fRotA11[sector] + pos[1] * fRotA12[sector];
389 rot[1] = -pos[0] * fRotA21[sector] + pos[1] * fRotA22[sector];
396 //_____________________________________________________________________________
397 Bool_t AliTRDgeometry::RotateBack(Int_t d, Float_t *rot, Float_t *pos) const
400 // Rotates a chambers from the position of sector 0 into its
401 // original position and transforms the corresponding local frame
402 // coordinates <rot> into the coordinates of the ALICE restframe <pos>.
405 Int_t sector = GetSector(d);
407 pos[0] = rot[0] * fRotB11[sector] + rot[1] * fRotB12[sector];
408 pos[1] = -rot[0] * fRotB21[sector] + rot[1] * fRotB22[sector];
415 //_____________________________________________________________________________
416 Int_t AliTRDgeometry::GetDetectorSec(const Int_t p, const Int_t c) const
419 // Convert plane / chamber into detector number for one single sector
422 return (p + c * fgkNplan);
426 //_____________________________________________________________________________
427 Int_t AliTRDgeometry::GetDetector(const Int_t p, const Int_t c, const Int_t s) const
430 // Convert plane / chamber / sector into detector number
433 return (p + c * fgkNplan + s * fgkNplan * fgkNcham);
437 //_____________________________________________________________________________
438 Int_t AliTRDgeometry::GetPlane(const Int_t d) const
441 // Reconstruct the plane number from the detector number
444 return ((Int_t) (d % fgkNplan));
448 //_____________________________________________________________________________
449 Int_t AliTRDgeometry::GetChamber(const Int_t d) const
452 // Reconstruct the chamber number from the detector number
455 return ((Int_t) (d % (fgkNplan * fgkNcham)) / fgkNplan);
459 //_____________________________________________________________________________
460 Int_t AliTRDgeometry::GetSector(const Int_t d) const
463 // Reconstruct the sector number from the detector number
466 return ((Int_t) (d / (fgkNplan * fgkNcham)));