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f7336fa3 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
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 | **************************************************************************/ | |
15 | ||
16 | /* | |
17 | $Log$ | |
8230f242 | 18 | Revision 1.3 2000/06/07 16:25:37 cblume |
19 | Try to remove compiler warnings on Sun and HP | |
20 | ||
9d0b222b | 21 | Revision 1.2 2000/05/08 16:17:27 cblume |
22 | Merge TRD-develop | |
23 | ||
6f1e466d | 24 | Revision 1.1.4.1 2000/05/08 14:45:55 cblume |
25 | Bug fix in RotateBack(). Geometry update | |
26 | ||
27 | Revision 1.1 2000/02/28 19:00:44 cblume | |
28 | Add new TRD classes | |
29 | ||
f7336fa3 | 30 | */ |
31 | ||
32 | /////////////////////////////////////////////////////////////////////////////// | |
33 | // // | |
34 | // TRD geometry class // | |
35 | // // | |
36 | /////////////////////////////////////////////////////////////////////////////// | |
37 | ||
38 | #include "AliTRDgeometry.h" | |
39 | #include "AliTRDrecPoint.h" | |
40 | ||
41 | ClassImp(AliTRDgeometry) | |
42 | ||
43 | //_____________________________________________________________________________ | |
44 | AliTRDgeometry::AliTRDgeometry():AliGeometry() | |
45 | { | |
46 | // | |
47 | // AliTRDgeometry default constructor | |
48 | // | |
49 | ||
50 | Init(); | |
51 | ||
52 | } | |
53 | ||
54 | //_____________________________________________________________________________ | |
55 | AliTRDgeometry::~AliTRDgeometry() | |
56 | { | |
8230f242 | 57 | // |
58 | // AliTRDgeometry destructor | |
59 | // | |
f7336fa3 | 60 | |
61 | } | |
62 | ||
63 | //_____________________________________________________________________________ | |
64 | void AliTRDgeometry::Init() | |
65 | { | |
66 | // | |
67 | // Initializes the geometry parameter | |
68 | // | |
69 | ||
70 | Int_t iplan; | |
71 | ||
72 | // The width of the chambers | |
73 | fCwidth[0] = 99.6; | |
74 | fCwidth[1] = 104.1; | |
75 | fCwidth[2] = 108.5; | |
76 | fCwidth[3] = 112.9; | |
77 | fCwidth[4] = 117.4; | |
78 | fCwidth[5] = 121.8; | |
79 | ||
80 | // The default pad dimensions | |
81 | fRowPadSize = 4.5; | |
82 | fColPadSize = 1.0; | |
83 | fTimeBinSize = 0.1; | |
84 | ||
85 | // The maximum number of pads | |
86 | // and the position of pad 0,0,0 | |
87 | // | |
88 | // chambers seen from the top: | |
89 | // +----------------------------+ | |
90 | // | | | |
91 | // | | ^ | |
92 | // | | rphi| | |
93 | // | | | | |
94 | // |0 | | | |
95 | // +----------------------------+ +------> | |
96 | // z | |
97 | // chambers seen from the side: ^ | |
98 | // +----------------------------+ time| | |
99 | // | | | | |
100 | // |0 | | | |
101 | // +----------------------------+ +------> | |
102 | // z | |
103 | // | |
104 | ||
105 | // The pad column (rphi-direction) | |
106 | for (iplan = 0; iplan < kNplan; iplan++) { | |
107 | fColMax[iplan] = 1 + TMath::Nint((fCwidth[iplan] - 2. * kCcthick) | |
108 | / fColPadSize - 0.5); | |
109 | fCol0[iplan] = -fCwidth[iplan]/2. + kCcthick; | |
110 | } | |
111 | ||
112 | // The time bucket | |
113 | fTimeMax = 1 + TMath::Nint(kDrThick / fTimeBinSize - 0.5); | |
114 | for (iplan = 0; iplan < kNplan; iplan++) { | |
115 | fTime0[iplan] = kRmin + kCcframe/2. + kDrZpos - 0.5 * kDrThick | |
116 | + iplan * (kCheight + kCspace); | |
117 | } | |
118 | ||
119 | } | |
120 | ||
121 | //_____________________________________________________________________________ | |
122 | void AliTRDgeometry::CreateGeometry(Int_t *idtmed) | |
123 | { | |
124 | // | |
125 | // Create the TRD geometry | |
126 | // | |
127 | // Author: Christoph Blume (C.Blume@gsi.de) 20/07/99 | |
128 | // | |
129 | // The volumes: | |
130 | // TRD1-3 (Air) --- The TRD mother volumes for one sector. | |
131 | // To be placed into the spaceframe. | |
132 | // | |
133 | // UAFI(/M/O) (Al) --- The aluminum frame of the inner(/middle/outer) chambers (readout) | |
134 | // UCFI(/M/O) (C) --- The carbon frame of the inner(/middle/outer) chambers | |
135 | // (driftchamber + radiator) | |
136 | // UAII(/M/O) (Air) --- The inner part of the readout of the inner(/middle/outer) chambers | |
137 | // UFII(/M/O) (Air) --- The inner part of the chamner and radiator of the | |
138 | // inner(/middle/outer) chambers | |
139 | // | |
140 | // The material layers in one chamber: | |
141 | // UL01 (G10) --- The gas seal of the radiator | |
142 | // UL02 (CO2) --- The gas in the radiator | |
143 | // UL03 (PE) --- The foil stack | |
144 | // UL04 (Mylar) --- Entrance window to the driftvolume and HV-cathode | |
145 | // UL05 (Xe) --- The driftvolume | |
146 | // UL06 (Xe) --- The amplification region | |
147 | // | |
148 | // UL07 (Cu) --- The pad plane | |
149 | // UL08 (G10) --- The Nomex honeycomb support structure | |
150 | // UL09 (Cu) --- FEE and signal lines | |
151 | // UL10 (PE) --- The cooling devices | |
152 | // UL11 (Water) --- The cooling water | |
153 | ||
8230f242 | 154 | const Int_t kNparCha = 3; |
f7336fa3 | 155 | |
8230f242 | 156 | Float_t parDum[3]; |
157 | Float_t parCha[kNparCha]; | |
f7336fa3 | 158 | |
159 | Float_t xpos, ypos, zpos; | |
160 | ||
161 | // The aluminum frames - readout + electronics (Al) | |
162 | // The inner chambers | |
8230f242 | 163 | gMC->Gsvolu("UAFI","BOX ",idtmed[1301-1],parDum,0); |
f7336fa3 | 164 | // The middle chambers |
8230f242 | 165 | gMC->Gsvolu("UAFM","BOX ",idtmed[1301-1],parDum,0); |
f7336fa3 | 166 | // The outer chambers |
8230f242 | 167 | gMC->Gsvolu("UAFO","BOX ",idtmed[1301-1],parDum,0); |
f7336fa3 | 168 | |
169 | // The inner part of the aluminum frames (Air) | |
170 | // The inner chambers | |
8230f242 | 171 | gMC->Gsvolu("UAII","BOX ",idtmed[1302-1],parDum,0); |
f7336fa3 | 172 | // The middle chambers |
8230f242 | 173 | gMC->Gsvolu("UAIM","BOX ",idtmed[1302-1],parDum,0); |
f7336fa3 | 174 | // The outer chambers |
8230f242 | 175 | gMC->Gsvolu("UAIO","BOX ",idtmed[1302-1],parDum,0); |
f7336fa3 | 176 | |
177 | // The carbon frames - radiator + driftchamber (C) | |
178 | // The inner chambers | |
8230f242 | 179 | gMC->Gsvolu("UCFI","BOX ",idtmed[1307-1],parDum,0); |
f7336fa3 | 180 | // The middle chambers |
8230f242 | 181 | gMC->Gsvolu("UCFM","BOX ",idtmed[1307-1],parDum,0); |
f7336fa3 | 182 | // The outer chambers |
8230f242 | 183 | gMC->Gsvolu("UCFO","BOX ",idtmed[1307-1],parDum,0); |
f7336fa3 | 184 | |
185 | // The inner part of the carbon frames (Air) | |
186 | // The inner chambers | |
8230f242 | 187 | gMC->Gsvolu("UCII","BOX ",idtmed[1302-1],parDum,0); |
f7336fa3 | 188 | // The middle chambers |
8230f242 | 189 | gMC->Gsvolu("UCIM","BOX ",idtmed[1302-1],parDum,0); |
f7336fa3 | 190 | // The outer chambers |
8230f242 | 191 | gMC->Gsvolu("UCIO","BOX ",idtmed[1302-1],parDum,0); |
f7336fa3 | 192 | |
193 | // The material layers inside the chambers | |
8230f242 | 194 | parCha[0] = -1.; |
195 | parCha[1] = -1.; | |
f7336fa3 | 196 | // G10 layer (radiator seal) |
8230f242 | 197 | parCha[2] = kSeThick/2; |
198 | gMC->Gsvolu("UL01","BOX ",idtmed[1313-1],parCha,kNparCha); | |
f7336fa3 | 199 | // CO2 layer (radiator) |
8230f242 | 200 | parCha[2] = kRaThick/2; |
201 | gMC->Gsvolu("UL02","BOX ",idtmed[1312-1],parCha,kNparCha); | |
f7336fa3 | 202 | // PE layer (radiator) |
8230f242 | 203 | parCha[2] = kPeThick/2; |
204 | gMC->Gsvolu("UL03","BOX ",idtmed[1303-1],parCha,kNparCha); | |
f7336fa3 | 205 | // Mylar layer (entrance window + HV cathode) |
8230f242 | 206 | parCha[2] = kMyThick/2; |
207 | gMC->Gsvolu("UL04","BOX ",idtmed[1308-1],parCha,kNparCha); | |
f7336fa3 | 208 | // Xe/Isobutane layer (drift volume, sensitive) |
8230f242 | 209 | parCha[2] = kDrThick/2.; |
210 | gMC->Gsvolu("UL05","BOX ",idtmed[1309-1],parCha,kNparCha); | |
f7336fa3 | 211 | // Xe/Isobutane layer (amplification volume, not sensitive) |
8230f242 | 212 | parCha[2] = kAmThick/2.; |
213 | gMC->Gsvolu("UL06","BOX ",idtmed[1309-1],parCha,kNparCha); | |
f7336fa3 | 214 | |
215 | // Cu layer (pad plane) | |
8230f242 | 216 | parCha[2] = kCuThick/2; |
217 | gMC->Gsvolu("UL07","BOX ",idtmed[1305-1],parCha,kNparCha); | |
f7336fa3 | 218 | // G10 layer (support structure) |
8230f242 | 219 | parCha[2] = kSuThick/2; |
220 | gMC->Gsvolu("UL08","BOX ",idtmed[1313-1],parCha,kNparCha); | |
f7336fa3 | 221 | // Cu layer (FEE + signal lines) |
8230f242 | 222 | parCha[2] = kFeThick/2; |
223 | gMC->Gsvolu("UL09","BOX ",idtmed[1305-1],parCha,kNparCha); | |
f7336fa3 | 224 | // PE layer (cooling devices) |
8230f242 | 225 | parCha[2] = kCoThick/2; |
226 | gMC->Gsvolu("UL10","BOX ",idtmed[1303-1],parCha,kNparCha); | |
f7336fa3 | 227 | // Water layer (cooling) |
8230f242 | 228 | parCha[2] = kWaThick/2; |
229 | gMC->Gsvolu("UL11","BOX ",idtmed[1314-1],parCha,kNparCha); | |
f7336fa3 | 230 | |
231 | // Position the layers in the chambers | |
232 | xpos = 0; | |
233 | ypos = 0; | |
234 | ||
235 | // G10 layer (radiator seal) | |
236 | zpos = kSeZpos; | |
237 | gMC->Gspos("UL01",1,"UCII",xpos,ypos,zpos,0,"ONLY"); | |
238 | gMC->Gspos("UL01",2,"UCIM",xpos,ypos,zpos,0,"ONLY"); | |
239 | gMC->Gspos("UL01",3,"UCIO",xpos,ypos,zpos,0,"ONLY"); | |
240 | // CO2 layer (radiator) | |
241 | zpos = kRaZpos; | |
242 | gMC->Gspos("UL02",1,"UCII",xpos,ypos,zpos,0,"ONLY"); | |
243 | gMC->Gspos("UL02",2,"UCIM",xpos,ypos,zpos,0,"ONLY"); | |
244 | gMC->Gspos("UL02",3,"UCIO",xpos,ypos,zpos,0,"ONLY"); | |
245 | // PE layer (radiator) | |
246 | zpos = 0; | |
247 | gMC->Gspos("UL03",1,"UL02",xpos,ypos,zpos,0,"ONLY"); | |
248 | // Mylar layer (entrance window + HV cathode) | |
249 | zpos = kMyZpos; | |
250 | gMC->Gspos("UL04",1,"UCII",xpos,ypos,zpos,0,"ONLY"); | |
251 | gMC->Gspos("UL04",2,"UCIM",xpos,ypos,zpos,0,"ONLY"); | |
252 | gMC->Gspos("UL04",3,"UCIO",xpos,ypos,zpos,0,"ONLY"); | |
253 | // Xe/Isobutane layer (drift volume) | |
254 | zpos = kDrZpos; | |
255 | gMC->Gspos("UL05",1,"UCII",xpos,ypos,zpos,0,"ONLY"); | |
256 | gMC->Gspos("UL05",2,"UCIM",xpos,ypos,zpos,0,"ONLY"); | |
257 | gMC->Gspos("UL05",3,"UCIO",xpos,ypos,zpos,0,"ONLY"); | |
258 | // Xe/Isobutane layer (amplification volume) | |
259 | zpos = kAmZpos; | |
260 | gMC->Gspos("UL06",1,"UCII",xpos,ypos,zpos,0,"ONLY"); | |
261 | gMC->Gspos("UL06",2,"UCIM",xpos,ypos,zpos,0,"ONLY"); | |
262 | gMC->Gspos("UL06",3,"UCIO",xpos,ypos,zpos,0,"ONLY"); | |
263 | ||
264 | // Cu layer (pad plane) | |
265 | zpos = kCuZpos; | |
266 | gMC->Gspos("UL07",1,"UAII",xpos,ypos,zpos,0,"ONLY"); | |
267 | gMC->Gspos("UL07",2,"UAIM",xpos,ypos,zpos,0,"ONLY"); | |
268 | gMC->Gspos("UL07",3,"UAIO",xpos,ypos,zpos,0,"ONLY"); | |
269 | // G10 layer (support structure) | |
270 | zpos = kSuZpos; | |
271 | gMC->Gspos("UL08",1,"UAII",xpos,ypos,zpos,0,"ONLY"); | |
272 | gMC->Gspos("UL08",2,"UAIM",xpos,ypos,zpos,0,"ONLY"); | |
273 | gMC->Gspos("UL08",3,"UAIO",xpos,ypos,zpos,0,"ONLY"); | |
274 | // Cu layer (FEE + signal lines) | |
275 | zpos = kFeZpos; | |
276 | gMC->Gspos("UL09",1,"UAII",xpos,ypos,zpos,0,"ONLY"); | |
277 | gMC->Gspos("UL09",2,"UAIM",xpos,ypos,zpos,0,"ONLY"); | |
278 | gMC->Gspos("UL09",3,"UAIO",xpos,ypos,zpos,0,"ONLY"); | |
279 | // PE layer (cooling devices) | |
280 | zpos = kCoZpos; | |
281 | gMC->Gspos("UL10",1,"UAII",xpos,ypos,zpos,0,"ONLY"); | |
282 | gMC->Gspos("UL10",2,"UAIM",xpos,ypos,zpos,0,"ONLY"); | |
283 | gMC->Gspos("UL10",3,"UAIO",xpos,ypos,zpos,0,"ONLY"); | |
284 | // Water layer (cooling) | |
285 | zpos = kWaZpos; | |
286 | gMC->Gspos("UL11",1,"UAII",xpos,ypos,zpos,0,"ONLY"); | |
287 | gMC->Gspos("UL11",1,"UAIM",xpos,ypos,zpos,0,"ONLY"); | |
288 | gMC->Gspos("UL11",1,"UAIO",xpos,ypos,zpos,0,"ONLY"); | |
289 | ||
290 | } | |
291 | ||
292 | //_____________________________________________________________________________ | |
293 | Bool_t AliTRDgeometry::Local2Global(Int_t idet, Float_t *local, Float_t *global) | |
294 | { | |
295 | // | |
296 | // Converts local pad-coordinates (row,col,time) into | |
297 | // global ALICE reference frame coordinates (x,y,z) | |
298 | // | |
299 | ||
300 | Int_t icham = GetChamber(idet); // Chamber info (0-4) | |
301 | Int_t isect = GetSector(idet); // Sector info (0-17) | |
302 | Int_t iplan = GetPlane(idet); // Plane info (0-5) | |
303 | ||
6f1e466d | 304 | return Local2Global(iplan,icham,isect,local,global); |
f7336fa3 | 305 | |
306 | } | |
307 | ||
308 | //_____________________________________________________________________________ | |
309 | Bool_t AliTRDgeometry::Local2Global(Int_t iplan, Int_t icham, Int_t isect | |
310 | , Float_t *local, Float_t *global) | |
311 | { | |
312 | // | |
313 | // Converts local pad-coordinates (row,col,time) into | |
314 | // global ALICE reference frame coordinates (x,y,z) | |
315 | // | |
316 | ||
317 | Int_t idet = GetDetector(iplan,icham,isect); // Detector number | |
318 | ||
319 | Float_t padRow = local[0]; // Pad Row position | |
320 | Float_t padCol = local[1]; // Pad Column position | |
321 | Float_t timeSlice = local[2]; // Time "position" | |
322 | ||
323 | Float_t row0 = GetRow0(iplan,icham,isect); | |
324 | Float_t col0 = GetCol0(iplan); | |
325 | Float_t time0 = GetTime0(iplan); | |
326 | ||
327 | Float_t rot[3]; | |
328 | ||
329 | // calculate (x,y,z) position in rotated chamber | |
f7336fa3 | 330 | rot[0] = time0 + timeSlice * fTimeBinSize; |
6f1e466d | 331 | rot[1] = col0 + padCol * fColPadSize; |
f7336fa3 | 332 | rot[2] = row0 + padRow * fRowPadSize; |
333 | ||
334 | // Rotate back to original position | |
335 | return RotateBack(idet,rot,global); | |
336 | ||
337 | } | |
338 | ||
339 | //_____________________________________________________________________________ | |
340 | Bool_t AliTRDgeometry::Rotate(Int_t d, Float_t *pos, Float_t *rot) | |
341 | { | |
342 | // | |
343 | // Rotates all chambers in the position of sector 0 and transforms | |
344 | // the coordinates in the ALICE restframe <pos> into the | |
345 | // corresponding local frame <rot>. | |
346 | // | |
347 | ||
348 | Int_t sector = GetSector(d); | |
349 | ||
350 | Float_t phi = -2.0 * kPI / (Float_t) kNsect * ((Float_t) sector + 0.5); | |
351 | ||
352 | rot[0] = pos[0] * TMath::Cos(phi) + pos[1] * TMath::Sin(phi); | |
353 | rot[1] = -pos[0] * TMath::Sin(phi) + pos[1] * TMath::Cos(phi); | |
354 | rot[2] = pos[2]; | |
355 | ||
356 | return kTRUE; | |
357 | ||
358 | } | |
359 | ||
360 | //_____________________________________________________________________________ | |
361 | Bool_t AliTRDgeometry::RotateBack(Int_t d, Float_t *rot, Float_t *pos) | |
362 | { | |
363 | // | |
364 | // Rotates a chambers from the position of sector 0 into its | |
365 | // original position and transforms the corresponding local frame | |
366 | // coordinates <rot> into the coordinates of the ALICE restframe <pos>. | |
367 | // | |
368 | ||
369 | Int_t sector = GetSector(d); | |
370 | ||
371 | Float_t phi = 2.0 * kPI / (Float_t) kNsect * ((Float_t) sector + 0.5); | |
372 | ||
6f1e466d | 373 | pos[0] = rot[0] * TMath::Cos(phi) + rot[1] * TMath::Sin(phi); |
374 | pos[1] = -rot[0] * TMath::Sin(phi) + rot[1] * TMath::Cos(phi); | |
375 | pos[2] = rot[2]; | |
f7336fa3 | 376 | |
377 | return kTRUE; | |
378 | ||
379 | } | |
380 | ||
381 | //_____________________________________________________________________________ | |
382 | Int_t AliTRDgeometry::GetDetector(Int_t p, Int_t c, Int_t s) | |
383 | { | |
384 | // | |
385 | // Convert plane / chamber / sector into detector number | |
386 | // | |
387 | ||
388 | return (p + c * kNplan + s * kNplan * kNcham); | |
389 | ||
390 | } | |
391 | ||
392 | //_____________________________________________________________________________ | |
393 | Int_t AliTRDgeometry::GetPlane(Int_t d) | |
394 | { | |
395 | // | |
396 | // Reconstruct the plane number from the detector number | |
397 | // | |
398 | ||
399 | return ((Int_t) (d % kNplan)); | |
400 | ||
401 | } | |
402 | ||
403 | //_____________________________________________________________________________ | |
404 | Int_t AliTRDgeometry::GetChamber(Int_t d) | |
405 | { | |
406 | // | |
407 | // Reconstruct the chamber number from the detector number | |
408 | // | |
409 | ||
410 | return ((Int_t) (d % (kNplan * kNcham)) / kNplan); | |
411 | ||
412 | } | |
413 | ||
414 | //_____________________________________________________________________________ | |
415 | Int_t AliTRDgeometry::GetSector(Int_t d) | |
416 | { | |
417 | // | |
418 | // Reconstruct the sector number from the detector number | |
419 | // | |
420 | ||
421 | return ((Int_t) (d / (kNplan * kNcham))); | |
422 | ||
423 | } | |
424 | ||
425 | //_____________________________________________________________________________ | |
426 | void AliTRDgeometry::GetGlobal(const AliRecPoint *p, TVector3 &pos, TMatrix &mat) | |
427 | { | |
428 | // | |
429 | // Returns the global coordinate and error matrix of a AliTRDrecPoint | |
430 | // | |
431 | ||
432 | GetGlobal(p,pos); | |
9d0b222b | 433 | mat.Zero(); |
f7336fa3 | 434 | |
435 | } | |
436 | ||
437 | //_____________________________________________________________________________ | |
438 | void AliTRDgeometry::GetGlobal(const AliRecPoint *p, TVector3 &pos) | |
439 | { | |
440 | // | |
441 | // Returns the global coordinate and error matrix of a AliTRDrecPoint | |
442 | // | |
443 | ||
444 | Int_t detector = ((AliTRDrecPoint *) p)->GetDetector(); | |
445 | ||
446 | Float_t global[3]; | |
447 | Float_t local[3]; | |
6f1e466d | 448 | local[0] = ((AliTRDrecPoint *) p)->GetLocalRow(); |
449 | local[1] = ((AliTRDrecPoint *) p)->GetLocalCol(); | |
450 | local[2] = ((AliTRDrecPoint *) p)->GetLocalTime(); | |
f7336fa3 | 451 | |
452 | if (Local2Global(detector,local,global)) { | |
453 | pos.SetX(global[0]); | |
454 | pos.SetY(global[1]); | |
455 | pos.SetZ(global[2]); | |
456 | } | |
457 | else { | |
458 | pos.SetX(0.0); | |
459 | pos.SetY(0.0); | |
460 | pos.SetZ(0.0); | |
461 | } | |
462 | ||
463 | } |