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0f4a7374 | 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 | $Log$ | |
fb9747d4 | 18 | Revision 1.2 2003/12/29 17:26:01 hristov |
19 | Using enum to initaialize static ints in the header file, the initialization of static floats moved to the implementation file | |
20 | ||
58eb5b61 | 21 | Revision 1.1 2003/12/29 15:18:03 decaro |
22 | TOF geometry updating (addition of AliTOFGeometry) | |
23 | ||
0f4a7374 | 24 | Revision 0.01 2003/12/04 S.Arcelli |
25 | Revision 0.02 2003/12/10 S.Arcelli: | |
26 | Implement Global methods GetPos & GetDetID | |
27 | Revision 0.03 2003/12/14 S.Arcelli | |
28 | Set Phi range [-180,180]->[0,360] | |
29 | */ | |
30 | ||
31 | #include <stdlib.h> | |
32 | #include <Riostream.h> | |
33 | /////////////////////////////////////////////////////////////////////////////// | |
34 | // // | |
35 | // TOF Geometry class // | |
36 | // // | |
37 | /////////////////////////////////////////////////////////////////////////////// | |
38 | ||
39 | #include "AliConst.h" | |
40 | #include "AliTOFGeometry.h" | |
41 | ||
42 | ClassImp(AliTOFGeometry) | |
43 | ||
fb9747d4 | 44 | const Int_t AliTOFGeometry::fgkTimeDiff = 25000;// Min signal separation (ps) |
58eb5b61 | 45 | |
fb9747d4 | 46 | const Float_t AliTOFGeometry::fgkRmin = 370.; // Inner radius of the TOF (cm) |
47 | const Float_t AliTOFGeometry::fgkRmax = 399; // Outer radius of the TOF (cm) | |
48 | const Float_t AliTOFGeometry::fgkZlenA = 106.0;// length (cm) of the A module | |
49 | const Float_t AliTOFGeometry::fgkZlenB = 141.0;// length (cm) of the B module | |
50 | const Float_t AliTOFGeometry::fgkZlenC = 177.5;// length (cm) of the C module | |
51 | const Float_t AliTOFGeometry::fgkXPad = 2.5; // Pad size in the x direction (cm) | |
52 | const Float_t AliTOFGeometry::fgkZPad = 3.5; // Pad size in the z direction (cm) | |
53 | const Float_t AliTOFGeometry::fgkMaxhZtof = 371.5;// Max half z-size of TOF (cm) | |
58eb5b61 | 54 | |
55 | ||
fb9747d4 | 56 | const Float_t AliTOFGeometry::fgkSigmaForTail1= 2.;//Sig1 for simulation of TDC tails |
57 | const Float_t AliTOFGeometry::fgkSigmaForTail2= 0.5;//Sig2 for simulation of TDC tails | |
58 | const Float_t AliTOFGeometry::fgkSpeedOfLight = 0.299792458;// c (10^9 m/s) | |
59 | const Float_t AliTOFGeometry::fgkPionMass = 0.13957;// pion mass (Gev/c^2) | |
60 | const Float_t AliTOFGeometry::fgkKaonMass = 0.49368;// kaon mass (Gev/c^2) | |
61 | const Float_t AliTOFGeometry::fgkProtonMass = 0.93827;// proton mass (Gev/c^2) | |
62 | const Float_t AliTOFGeometry::fgkElectronMass = 0.00051;// electron mass (Gev/c^2) | |
63 | const Float_t AliTOFGeometry::fgkMuonMass = 0.10566;// muon mass (Gev/c^2) | |
58eb5b61 | 64 | |
65 | ||
fb9747d4 | 66 | const Float_t AliTOFGeometry::fgkDprecMin = 0.0000075;//num.prec.tolerance on Thmin |
67 | const Float_t AliTOFGeometry::fgkDprecMax = 0.0000100;//num.prec.tolerance on Thma | |
68 | const Float_t AliTOFGeometry::fgkDprecCen = 0.0000005;//num.prec.tolerance on <Theta> | |
58eb5b61 | 69 | |
0f4a7374 | 70 | //_____________________________________________________________________________ |
71 | AliTOFGeometry::AliTOFGeometry() | |
72 | { | |
73 | // | |
74 | // AliTOFGeometry default constructor | |
75 | // | |
76 | Init(); | |
77 | ||
78 | } | |
79 | ||
80 | //_____________________________________________________________________________ | |
81 | AliTOFGeometry::~AliTOFGeometry() | |
82 | { | |
83 | // | |
84 | // AliTOFGeometry destructor | |
85 | // | |
86 | ||
87 | } | |
88 | //_____________________________________________________________________________ | |
89 | void AliTOFGeometry::Init() | |
90 | { | |
91 | // | |
92 | // Initialize strip Tilt Angles and Heights | |
93 | // | |
94 | // Strips Tilt Angles | |
95 | ||
96 | const Float_t angles[fgkNPlates][fgkMaxNstrip] ={ | |
97 | ||
98 | {44.494, 43.725, 42.946, 42.156, 41.357, 40.548, 39.729, 38.899, | |
99 | 38.060, 37.211, 36.353, 35.484, 34.606, 33.719, 32.822, 31.916, | |
100 | 31.001, 30.077, 29.144, 28.202 }, | |
101 | ||
102 | {26.884, 25.922, 24.952, 23.975, 22.989, 22.320, 21.016, 20.309, | |
103 | 19.015, 18.270, 16.989, 16.205, 14.941, 14.117, 12.871, 12.008, | |
104 | 10.784, 9.8807, 8.681, 0.0 }, | |
105 | ||
106 | { 7.5835, 6.4124, 5.4058, 4.2809, 3.2448, 2.1424, 1.078, -0., -1.078, | |
107 | -2.1424, -3.2448, -4.2809, -5.4058, -6.4124, -7.5835, 0.0, 0.0, 0.0, | |
108 | 0.0, 0.0 }, | |
109 | ||
110 | {-8.681, -9.8807, -10.784, -12.008, -12.871, -14.117, -14.941, -16.205, | |
111 | -16.989, -18.27, -19.015, -20.309, -21.016, -22.32, -22.989, | |
112 | -23.975, -24.952, -25.922, -26.884, 0. }, | |
113 | ||
114 | {-28.202, -29.144, -30.077, -31.001, -31.916, -32.822, -33.719, -34.606, | |
115 | -35.484, -36.353, -37.211, -38.06, -38.899, -39.729, -40.548, | |
116 | -41.357, -42.156, -42.946, -43.725, -44.494 }}; | |
117 | ||
118 | ||
119 | //Strips Heights | |
120 | ||
121 | const Float_t heights[fgkNPlates][fgkMaxNstrip]= { | |
122 | ||
123 | {-5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, | |
124 | -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5 }, | |
125 | ||
126 | {-6.3, -7.1, -7.9, -8.7, -9.5, -3, -9.5, -3, -9.5, -3, | |
127 | -9.5, -3.0, -9.5, -3.0, -9.5, -3, -9.5, -3, -9 , 0.}, | |
128 | ||
129 | { -3, -9, -4.5, -9, -4.5, -9, -4.5, -9, -4.5, -9, | |
130 | -4.5, -9, -4.5, -9, -3, 0.0, 0.0, 0.0, 0.0, 0.0 }, | |
131 | ||
132 | { -9, -3, -9.5, -3, -9.5, -3, -9.5, -3, -9.5, -3, -9.5, | |
133 | -3, -9.5, -3, -9.5, -8.7, -7.9, -7.1, -6.3, 0. }, | |
134 | ||
135 | {-5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, | |
136 | -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5 }}; | |
137 | ||
138 | ||
139 | // Deposit in fAngles, fHeights | |
140 | ||
141 | for (Int_t iplate = 0; iplate < fgkNPlates; iplate++) { | |
142 | for (Int_t istrip = 0; istrip < fgkMaxNstrip; istrip++) { | |
143 | fAngles[iplate][istrip] = angles[iplate][istrip]; | |
144 | fHeights[iplate][istrip] = heights[iplate][istrip]; | |
145 | } | |
146 | } | |
147 | ||
148 | fPhiSec = 360./fgkNSectors; | |
149 | } | |
150 | ||
151 | //_____________________________________________________________________________ | |
152 | void AliTOFGeometry::GetPos(Int_t *det, Float_t *pos) | |
153 | { | |
154 | // | |
155 | // Returns space point coor (x,y,z) (cm) for Detector | |
156 | // Indices (iSect,iPlate,iStrip,iPadX,iPadZ) | |
157 | // | |
158 | ||
159 | pos[0]=GetX(det); | |
160 | pos[1]=GetY(det); | |
161 | pos[2]=GetZ(det); | |
162 | ||
163 | } | |
164 | //_____________________________________________________________________________ | |
165 | void AliTOFGeometry::GetDetID( Float_t *pos, Int_t *det) | |
166 | { | |
167 | // | |
168 | // Returns Detector Indices (iSect,iPlate,iStrip,iPadX,iPadZ) | |
169 | // space point coor (x,y,z) (cm) | |
170 | ||
171 | ||
172 | det[0]=GetSector(pos); | |
173 | det[1]=GetPlate(pos); | |
174 | det[2]=GetStrip(pos); | |
175 | det[3]=GetPadZ(pos); | |
176 | det[4]=GetPadX(pos); | |
177 | ||
178 | } | |
179 | //_____________________________________________________________________________ | |
180 | Float_t AliTOFGeometry::GetX(Int_t *det) | |
181 | { | |
182 | // | |
183 | // Returns X coordinate (cm) | |
184 | // | |
185 | ||
186 | Int_t isector = det[0]; | |
187 | Int_t iplate = det[1]; | |
188 | Int_t istrip = det[2]; | |
189 | Int_t ipadz = det[3]; | |
190 | Int_t ipadx = det[4]; | |
191 | ||
192 | // Find out distance d on the plane wrt median phi: | |
193 | Float_t d = (ipadx+0.5)*fgkXPad-(fgkNpadX*fgkXPad)*0.5; | |
194 | ||
195 | // The radius r in xy plane: | |
196 | Float_t r = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip]+ | |
197 | (ipadz-0.5)*fgkZPad*TMath::Sin(fAngles[iplate][istrip]/kRaddeg)-0.25; | |
198 | ||
199 | // local azimuthal angle in the sector philoc | |
200 | Float_t philoc = TMath:: ATan(d/r); | |
201 | ||
202 | // azimuthal angle in the global frame phi | |
203 | Float_t phi = philoc*kRaddeg+(isector+0.5 )*fPhiSec; | |
204 | ||
205 | Float_t xCoor = r/TMath::Cos(philoc)*TMath::Cos(phi/kRaddeg); | |
206 | return xCoor; | |
207 | ||
208 | } | |
209 | //_____________________________________________________________________________ | |
210 | Float_t AliTOFGeometry::GetY(Int_t *det) | |
211 | { | |
212 | // | |
213 | // Returns Y coordinate (cm) | |
214 | // | |
215 | ||
216 | Int_t isector = det[0]; | |
217 | Int_t iplate = det[1]; | |
218 | Int_t istrip = det[2]; | |
219 | Int_t ipadz = det[3]; | |
220 | Int_t ipadx = det[4]; | |
221 | ||
222 | // Find out distance d on the plane wrt median phi: | |
223 | Float_t d = (ipadx+0.5)*fgkXPad-(fgkNpadX*fgkXPad)*0.5; | |
224 | ||
225 | // The radius r in xy plane: | |
226 | Float_t r = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip]+ | |
227 | (ipadz-0.5)*fgkZPad*TMath::Sin(fAngles[iplate][istrip]/kRaddeg)-0.25; | |
228 | ||
229 | // local azimuthal angle in the sector philoc | |
230 | Float_t philoc = TMath:: ATan(d/r); | |
231 | ||
232 | // azimuthal angle in the global frame phi | |
233 | Float_t phi = philoc*kRaddeg+(isector+0.5 )*fPhiSec; | |
234 | ||
235 | Float_t yCoor = r/TMath::Cos(philoc)*TMath::Sin(phi/kRaddeg); | |
236 | return yCoor; | |
237 | ||
238 | } | |
239 | ||
240 | //_____________________________________________________________________________ | |
241 | Float_t AliTOFGeometry::GetZ(Int_t *det) | |
242 | { | |
243 | // | |
244 | // Returns Z coordinate (cm) | |
245 | // | |
246 | ||
247 | Int_t iplate = det[1]; | |
248 | Int_t istrip = det[2]; | |
249 | Int_t ipadz = det[3]; | |
250 | ||
251 | ||
252 | // The radius r in xy plane: | |
253 | Float_t r = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip]; | |
254 | ||
255 | Float_t zCoor = r*TMath::Tan(0.5*TMath::Pi()-GetStripTheta(iplate, istrip))- | |
256 | (ipadz-0.5)*fgkZPad*TMath::Cos(fAngles[iplate][istrip]/kRaddeg); | |
257 | return zCoor; | |
258 | ||
259 | } | |
260 | //_____________________________________________________________________________ | |
261 | Int_t AliTOFGeometry::GetSector(Float_t *pos) | |
262 | { | |
263 | // | |
264 | // Returns the Sector index | |
265 | // | |
266 | ||
267 | Int_t iSect = -1; | |
268 | ||
269 | Float_t x = pos[0]; | |
270 | Float_t y = pos[1]; | |
271 | ||
272 | Float_t phi = TMath::ATan2(y,x); | |
273 | if(phi<0.) phi=2.*TMath::Pi()+phi; | |
274 | iSect = (Int_t) (phi*kRaddeg/fPhiSec); | |
275 | ||
276 | return iSect; | |
277 | ||
278 | } | |
279 | //_____________________________________________________________________________ | |
280 | Int_t AliTOFGeometry::GetPadX(Float_t *pos) | |
281 | { | |
282 | // | |
283 | // Returns the Pad index along X | |
284 | // | |
285 | ||
286 | Int_t iPadX = -1; | |
287 | ||
288 | Float_t x = pos[0]; | |
289 | Float_t y = pos[1]; | |
290 | Float_t z = pos[2]; | |
291 | ||
292 | Int_t isector = GetSector(pos); | |
293 | if(isector == -1){ | |
294 | cout << "Detector Index could not be determined" << endl; | |
295 | return iPadX;} | |
296 | Int_t iplate = GetPlate(pos); | |
297 | if(iplate == -1){ | |
298 | cout << "Detector Index could not be determined" << endl; | |
299 | return iPadX;} | |
300 | Int_t istrip = GetStrip(pos); | |
301 | if(istrip == -1){ | |
302 | cout << "Detector Index could not be determined" << endl; | |
303 | return iPadX;} | |
304 | ||
305 | ||
306 | Float_t rho=TMath::Sqrt(x*x+y*y); | |
307 | Float_t phi = TMath::ATan2(y,x); | |
308 | if(phi<0.) phi=2.*TMath::Pi()+phi; | |
309 | ||
310 | // Get the local angle in the sector philoc | |
311 | Float_t philoc = phi*kRaddeg-(isector+0.5)*fPhiSec; | |
312 | philoc*=TMath::Pi()/180.; | |
313 | // theta projected on the median of the sector | |
314 | Float_t theta = TMath::ATan2(rho*TMath::Cos(philoc),z); | |
315 | // The radius r in xy plane: | |
316 | Float_t r = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip]+ | |
317 | (theta-GetStripTheta(iplate, istrip))/ | |
318 | (GetMaxStripTheta(iplate, istrip)-GetMinStripTheta(iplate, istrip)) | |
319 | * 2.*fgkZPad*TMath::Sin(fAngles[iplate][istrip]/kRaddeg)-0.25; | |
320 | ||
321 | // Find out distance projected onto the strip plane | |
322 | Float_t d = (r*TMath::Tan(philoc)+(fgkNpadX*fgkXPad)*0.5); | |
323 | ||
324 | iPadX = (Int_t) ( d/fgkXPad); | |
325 | return iPadX; | |
326 | ||
327 | } | |
328 | //_____________________________________________________________________________ | |
329 | Int_t AliTOFGeometry::GetPlate(Float_t *pos) | |
330 | { | |
331 | // | |
332 | // Returns the Plate index | |
333 | // | |
334 | Int_t iPlate=-1; | |
335 | ||
336 | Int_t isector = GetSector(pos); | |
337 | if(isector == -1){ | |
338 | cout << "Detector Index could not be determined" << endl; | |
339 | return iPlate;} | |
340 | ||
341 | Float_t x = pos[0]; | |
342 | Float_t y = pos[1]; | |
343 | Float_t z = pos[2]; | |
344 | ||
345 | Float_t rho=TMath::Sqrt(x*x+y*y); | |
346 | Float_t phi=TMath::ATan2(y,x); | |
347 | if(phi<0) phi=2.*TMath::Pi()+phi; | |
348 | // Get the local angle in the sector philoc | |
349 | Float_t philoc = phi*kRaddeg-(isector+0.5)*fPhiSec; | |
350 | philoc*=TMath::Pi()/180.; | |
351 | // theta projected on the median of the sector | |
352 | Float_t theta=TMath::ATan2(rho*TMath::Cos(philoc),z); | |
353 | ||
354 | for (Int_t i=0; i<fgkNPlates; i++){ | |
355 | if ( GetMaxPlateTheta(i) >= theta && | |
356 | GetMinPlateTheta(i) <= theta)iPlate=i; | |
357 | } | |
358 | ||
359 | return iPlate; | |
360 | ||
361 | } | |
362 | //_____________________________________________________________________________ | |
363 | Int_t AliTOFGeometry::GetStrip(Float_t *pos) | |
364 | { | |
365 | // | |
366 | // Returns the Strip index | |
367 | // | |
368 | ||
369 | Int_t iStrip=-1; | |
370 | ||
371 | ||
372 | Int_t isector = GetSector(pos); | |
373 | if(isector == -1){ | |
374 | cout << "Detector Index could not be determined" << endl; | |
375 | return iStrip;} | |
376 | Int_t iplate = GetPlate(pos); | |
377 | if(iplate == -1){ | |
378 | cout << "Detector Index could not be determined" << endl; | |
379 | return iStrip;} | |
380 | ||
381 | ||
382 | Float_t x = pos[0]; | |
383 | Float_t y = pos[1]; | |
384 | Float_t z = pos[2]; | |
385 | ||
386 | Int_t nstrips=0; | |
387 | if(iplate==0 || iplate == 4)nstrips=fgkNStripC; | |
388 | if(iplate==1 || iplate == 3)nstrips=fgkNStripB; | |
389 | if(iplate==2) nstrips=fgkNStripA; | |
390 | ||
391 | Float_t rho=TMath::Sqrt(x*x+y*y); | |
392 | Float_t phi=TMath::ATan2(y,x); | |
393 | if(phi<0) phi=2.*TMath::Pi()+phi; | |
394 | // Get the local angle in the sector philoc | |
395 | Float_t philoc = phi*kRaddeg-(isector+0.5)*fPhiSec; | |
396 | philoc*=TMath::Pi()/180.; | |
397 | // theta projected on the median of the sector | |
398 | Float_t theta=TMath::ATan2(rho*TMath::Cos(philoc),z); | |
399 | ||
400 | for (Int_t istrip=0; istrip<nstrips; istrip++){ | |
401 | ||
402 | if( | |
403 | GetMaxStripTheta(iplate,istrip) >= theta | |
404 | && | |
405 | GetMinStripTheta(iplate,istrip) <= theta ) iStrip = istrip; | |
406 | ||
407 | } | |
408 | ||
409 | return iStrip; | |
410 | } | |
411 | //_____________________________________________________________________________ | |
412 | Int_t AliTOFGeometry::GetPadZ(Float_t *pos) | |
413 | { | |
414 | // | |
415 | // Returns the Pad index along Z | |
416 | // | |
417 | Int_t iPadZ = -1; | |
418 | ||
419 | Int_t isector = GetSector(pos); | |
420 | if(isector == -1){ | |
421 | cout << "Detector Index could not be determined" << endl; | |
422 | return iPadZ;} | |
423 | Int_t iplate = GetPlate(pos); | |
424 | if(iplate == -1){ | |
425 | cout << "Detector Index could not be determined" << endl; | |
426 | return iPadZ;} | |
427 | Int_t istrip = GetStrip(pos); | |
428 | if(istrip == -1){ | |
429 | cout << "Detector Index could not be determined" << endl; | |
430 | return iPadZ;} | |
431 | ||
432 | ||
433 | Float_t x = pos[0]; | |
434 | Float_t y = pos[1]; | |
435 | Float_t z = pos[2]; | |
436 | ||
437 | Float_t rho=TMath::Sqrt(x*x+y*y); | |
438 | Float_t phi=TMath::ATan2(y,x); | |
439 | if(phi<0) phi=2.*TMath::Pi()+phi; | |
440 | Float_t philoc = phi*kRaddeg-(isector+0.5)*fPhiSec; | |
441 | philoc*=TMath::Pi()/180.; | |
442 | Float_t theta=TMath::ATan2(rho*TMath::Cos(philoc),z); | |
443 | ||
444 | if (theta >= GetStripTheta(iplate, istrip))iPadZ=1; | |
445 | else iPadZ=0; | |
446 | ||
447 | return iPadZ; | |
448 | } | |
449 | //_____________________________________________________________________________ | |
450 | Float_t AliTOFGeometry::GetMinPlateTheta(Int_t iPlate) | |
451 | { | |
452 | // | |
453 | // Returns the minimum theta angle of a given plate iPlate (rad) | |
454 | // | |
455 | ||
456 | ||
457 | Int_t index=0; | |
458 | ||
459 | Float_t delta =0.; | |
460 | if(iPlate==0)delta = -1. ; | |
461 | if(iPlate==1)delta = -0.5; | |
462 | if(iPlate==3)delta = +0.5; | |
463 | if(iPlate==4)delta = +1. ; | |
464 | ||
465 | Float_t z=(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][index]/kRaddeg)+delta; | |
466 | Float_t r=(fgkRmin+fgkRmax)/2.+fHeights[iPlate][index]; | |
467 | z =z+fgkZPad*TMath::Cos(fAngles[iPlate][index]/kRaddeg); | |
468 | r =r-fgkZPad*TMath::Sin(fAngles[iPlate][index]/kRaddeg); | |
469 | ||
470 | Float_t thmin = 0.5*TMath::Pi()-TMath::ATan(z/r)-fgkDprecMin; | |
471 | return thmin; | |
472 | ||
473 | } | |
474 | //_____________________________________________________________________________ | |
475 | Float_t AliTOFGeometry::GetMaxPlateTheta(Int_t iPlate) | |
476 | { | |
477 | // | |
478 | // Returns the maximum theta angle of a given plate iPlate (rad) | |
479 | ||
480 | Int_t index=0; | |
481 | if(iPlate==0 ||iPlate == 4)index=fgkNStripC-1; | |
482 | if(iPlate==1 ||iPlate == 3)index=fgkNStripB-1; | |
483 | if(iPlate==2) index=fgkNStripA-1; | |
484 | ||
485 | Float_t delta =0.; | |
486 | if(iPlate==0)delta = -1. ; | |
487 | if(iPlate==1)delta = -0.5; | |
488 | if(iPlate==3)delta = +0.5; | |
489 | if(iPlate==4)delta = +1. ; | |
490 | ||
491 | Float_t z=(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][index]/kRaddeg)+delta; | |
492 | Float_t r=(fgkRmin+fgkRmax)/2.+fHeights[iPlate][index]; | |
493 | z =z-fgkZPad*TMath::Cos(fAngles[iPlate][index]/kRaddeg); | |
494 | r= r+fgkZPad*TMath::Sin(fAngles[iPlate][index]/kRaddeg); | |
495 | ||
496 | Float_t thmax = 0.5*TMath::Pi()-TMath::ATan(z/r)+fgkDprecMax; | |
497 | return thmax; | |
498 | ||
499 | } | |
500 | //_____________________________________________________________________________ | |
501 | Float_t AliTOFGeometry::GetMaxStripTheta(Int_t iPlate, Int_t iStrip) | |
502 | { | |
503 | // | |
504 | // Returns the maximum theta angle of a given strip iStrip (rad) | |
505 | // | |
506 | ||
507 | ||
508 | Float_t delta =0.; | |
509 | if(iPlate==0)delta = -1. ; | |
510 | if(iPlate==1)delta = -0.5; | |
511 | if(iPlate==3)delta = +0.5; | |
512 | if(iPlate==4)delta = +1. ; | |
513 | ||
514 | Float_t r =(fgkRmin+fgkRmax)/2.+fHeights[iPlate][iStrip]; | |
515 | Float_t z =(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][iStrip]/kRaddeg)+delta; | |
516 | z = z-fgkZPad*TMath::Cos(fAngles[iPlate][iStrip]/kRaddeg); | |
517 | r = r+fgkZPad*TMath::Sin(fAngles[iPlate][iStrip]/kRaddeg); | |
518 | Float_t thmax =0.5*TMath::Pi()-TMath::ATan(z/r)+fgkDprecMax; | |
519 | return thmax; | |
520 | ||
521 | } | |
522 | ||
523 | //_____________________________________________________________________________ | |
524 | Float_t AliTOFGeometry::GetMinStripTheta(Int_t iPlate, Int_t iStrip) | |
525 | { | |
526 | // | |
527 | // Returns the minimum theta angle of a given Strip iStrip (rad) | |
528 | // | |
529 | ||
530 | ||
531 | Float_t delta =0.; | |
532 | if(iPlate==0)delta = -1. ; | |
533 | if(iPlate==1)delta = -0.5; | |
534 | if(iPlate==3)delta = +0.5; | |
535 | if(iPlate==4)delta = +1. ; | |
536 | ||
537 | ||
538 | Float_t r =(fgkRmin+fgkRmax)/2.+fHeights[iPlate][iStrip]; | |
539 | Float_t z =(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][iStrip]/kRaddeg)+delta; | |
540 | z =z+fgkZPad*TMath::Cos(fAngles[iPlate][iStrip]/kRaddeg); | |
541 | r =r-fgkZPad*TMath::Sin(fAngles[iPlate][iStrip]/kRaddeg); | |
542 | Float_t thmin =0.5*TMath::Pi()-TMath::ATan(z/r)-fgkDprecMin; | |
543 | ||
544 | return thmin; | |
545 | ||
546 | } | |
547 | ||
548 | ||
549 | //_____________________________________________________________________________ | |
550 | Float_t AliTOFGeometry::GetStripTheta(Int_t iPlate, Int_t iStrip) | |
551 | { | |
552 | // | |
553 | // returns the median theta angle of a given strip iStrip (rad) | |
554 | // | |
555 | ||
556 | ||
557 | Float_t delta =0.; | |
558 | if(iPlate==0)delta = -1. ; | |
559 | if(iPlate==1)delta = -0.5; | |
560 | if(iPlate==3)delta = +0.5; | |
561 | if(iPlate==4)delta = +1. ; | |
562 | ||
563 | Float_t r =(fgkRmin+fgkRmax)/2.+fHeights[iPlate][iStrip]; | |
564 | Float_t z =(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][iStrip]/kRaddeg)+delta; | |
565 | Float_t theta =0.5*TMath::Pi()-TMath::ATan(z/r); | |
566 | if(iPlate != 2){ | |
567 | if(theta > 0.5*TMath::Pi() )theta+=fgkDprecCen; | |
568 | if(theta < 0.5*TMath::Pi() )theta-=fgkDprecCen; | |
569 | } | |
570 | return theta; | |
571 | } | |
572 | ||
573 | ||
574 |