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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 | $Log$ | |
7e6dce66 | 18 | Revision 1.5 2004/04/20 14:37:22 hristov |
19 | Using TMath::Abs instead of fabs, arrays of variable size created/deleted correctly (HP,Sun) | |
20 | ||
9b49e4c9 | 21 | Revision 1.4 2004/04/13 09:42:51 decaro |
22 | Track reconstruction code for TOF: updating | |
23 | ||
74ea065c | 24 | Revision 1.3 2003/12/29 18:40:39 hristov |
25 | Copy/paste error corrected | |
26 | ||
fb9747d4 | 27 | Revision 1.2 2003/12/29 17:26:01 hristov |
28 | Using enum to initaialize static ints in the header file, the initialization of static floats moved to the implementation file | |
29 | ||
58eb5b61 | 30 | Revision 1.1 2003/12/29 15:18:03 decaro |
31 | TOF geometry updating (addition of AliTOFGeometry) | |
32 | ||
7e6dce66 | 33 | Revision 0.05 2004/6/11 A.De Caro |
34 | Implement Global method NpadXStrip | |
35 | Insert four float constants (originally in AliTOF class) | |
36 | Revision 0.04 2004/4/05 S.Arcelli | |
74ea065c | 37 | Implement Global methods IsInsideThePad |
38 | DistanceToPad | |
7e6dce66 | 39 | Revision 0.03 2003/12/14 S.Arcelli |
40 | Set Phi range [-180,180]->[0,360] | |
41 | Revision 0.02 2003/12/10 S.Arcelli: | |
42 | Implement Global methods GetPos & GetDetID | |
43 | Revision 0.01 2003/12/04 S.Arcelli | |
0f4a7374 | 44 | */ |
45 | ||
46 | #include <stdlib.h> | |
47 | #include <Riostream.h> | |
48 | /////////////////////////////////////////////////////////////////////////////// | |
49 | // // | |
50 | // TOF Geometry class // | |
51 | // // | |
52 | /////////////////////////////////////////////////////////////////////////////// | |
53 | ||
54 | #include "AliConst.h" | |
55 | #include "AliTOFGeometry.h" | |
56 | ||
57 | ClassImp(AliTOFGeometry) | |
58 | ||
7e6dce66 | 59 | const Int_t AliTOFGeometry::fgkTimeDiff = 25000; // Min signal separation (ps) |
58eb5b61 | 60 | |
7e6dce66 | 61 | const Float_t AliTOFGeometry::fgkxTOF = 371.; // Inner radius of the TOF for Reconstruction (cm) |
62 | const Float_t AliTOFGeometry::fgkRmin = 370.; // Inner radius of the TOF (cm) | |
63 | const Float_t AliTOFGeometry::fgkRmax = 399; // Outer radius of the TOF (cm) | |
64 | const Float_t AliTOFGeometry::fgkZlenA = 106.0; // length (cm) of the A module | |
65 | const Float_t AliTOFGeometry::fgkZlenB = 141.0; // length (cm) of the B module | |
66 | const Float_t AliTOFGeometry::fgkZlenC = 177.5; // length (cm) of the C module | |
67 | const Float_t AliTOFGeometry::fgkXPad = 2.5; // Pad size in the x direction (cm) | |
68 | const Float_t AliTOFGeometry::fgkZPad = 3.5; // Pad size in the z direction (cm) | |
69 | const Float_t AliTOFGeometry::fgkMaxhZtof = 371.5; // Max half z-size of TOF (cm) | |
70 | const Float_t AliTOFGeometry::fgkStripLength = 122.;// Strip Length (rho X phi direction) (cm) | |
71 | const Float_t AliTOFGeometry::fgkDeadBndX = 1.0; // Dead Boundaries of a Strip along X direction (length) (cm) | |
72 | const Float_t AliTOFGeometry::fgkDeadBndZ = 1.5; // Dead Boundaries of a Strip along Z direction (width) (cm) | |
73 | const Float_t AliTOFGeometry::fgkOverSpc = 15.3; // Space available for sensitive layers in radial direction (cm) | |
58eb5b61 | 74 | |
75 | ||
fb9747d4 | 76 | const Float_t AliTOFGeometry::fgkSigmaForTail1= 2.;//Sig1 for simulation of TDC tails |
77 | const Float_t AliTOFGeometry::fgkSigmaForTail2= 0.5;//Sig2 for simulation of TDC tails | |
78 | const Float_t AliTOFGeometry::fgkSpeedOfLight = 0.299792458;// c (10^9 m/s) | |
79 | const Float_t AliTOFGeometry::fgkPionMass = 0.13957;// pion mass (Gev/c^2) | |
80 | const Float_t AliTOFGeometry::fgkKaonMass = 0.49368;// kaon mass (Gev/c^2) | |
81 | const Float_t AliTOFGeometry::fgkProtonMass = 0.93827;// proton mass (Gev/c^2) | |
82 | const Float_t AliTOFGeometry::fgkElectronMass = 0.00051;// electron mass (Gev/c^2) | |
83 | const Float_t AliTOFGeometry::fgkMuonMass = 0.10566;// muon mass (Gev/c^2) | |
58eb5b61 | 84 | |
85 | ||
fb9747d4 | 86 | const Float_t AliTOFGeometry::fgkDprecMin = 0.0000075;//num.prec.tolerance on Thmin |
87 | const Float_t AliTOFGeometry::fgkDprecMax = 0.0000100;//num.prec.tolerance on Thma | |
88 | const Float_t AliTOFGeometry::fgkDprecCen = 0.0000005;//num.prec.tolerance on <Theta> | |
58eb5b61 | 89 | |
0f4a7374 | 90 | //_____________________________________________________________________________ |
91 | AliTOFGeometry::AliTOFGeometry() | |
92 | { | |
93 | // | |
94 | // AliTOFGeometry default constructor | |
95 | // | |
96 | Init(); | |
97 | ||
98 | } | |
99 | ||
100 | //_____________________________________________________________________________ | |
101 | AliTOFGeometry::~AliTOFGeometry() | |
102 | { | |
103 | // | |
104 | // AliTOFGeometry destructor | |
105 | // | |
106 | ||
107 | } | |
108 | //_____________________________________________________________________________ | |
109 | void AliTOFGeometry::Init() | |
110 | { | |
111 | // | |
112 | // Initialize strip Tilt Angles and Heights | |
113 | // | |
114 | // Strips Tilt Angles | |
115 | ||
74ea065c | 116 | Float_t const kangles[kNPlates][kMaxNstrip] ={ |
0f4a7374 | 117 | |
118 | {44.494, 43.725, 42.946, 42.156, 41.357, 40.548, 39.729, 38.899, | |
119 | 38.060, 37.211, 36.353, 35.484, 34.606, 33.719, 32.822, 31.916, | |
120 | 31.001, 30.077, 29.144, 28.202 }, | |
121 | ||
122 | {26.884, 25.922, 24.952, 23.975, 22.989, 22.320, 21.016, 20.309, | |
123 | 19.015, 18.270, 16.989, 16.205, 14.941, 14.117, 12.871, 12.008, | |
124 | 10.784, 9.8807, 8.681, 0.0 }, | |
125 | ||
126 | { 7.5835, 6.4124, 5.4058, 4.2809, 3.2448, 2.1424, 1.078, -0., -1.078, | |
127 | -2.1424, -3.2448, -4.2809, -5.4058, -6.4124, -7.5835, 0.0, 0.0, 0.0, | |
128 | 0.0, 0.0 }, | |
129 | ||
130 | {-8.681, -9.8807, -10.784, -12.008, -12.871, -14.117, -14.941, -16.205, | |
131 | -16.989, -18.27, -19.015, -20.309, -21.016, -22.32, -22.989, | |
132 | -23.975, -24.952, -25.922, -26.884, 0. }, | |
133 | ||
134 | {-28.202, -29.144, -30.077, -31.001, -31.916, -32.822, -33.719, -34.606, | |
135 | -35.484, -36.353, -37.211, -38.06, -38.899, -39.729, -40.548, | |
136 | -41.357, -42.156, -42.946, -43.725, -44.494 }}; | |
137 | ||
138 | ||
139 | //Strips Heights | |
140 | ||
74ea065c | 141 | Float_t const kheights[kNPlates][kMaxNstrip]= { |
0f4a7374 | 142 | |
143 | {-5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, | |
144 | -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5 }, | |
145 | ||
146 | {-6.3, -7.1, -7.9, -8.7, -9.5, -3, -9.5, -3, -9.5, -3, | |
147 | -9.5, -3.0, -9.5, -3.0, -9.5, -3, -9.5, -3, -9 , 0.}, | |
148 | ||
149 | { -3, -9, -4.5, -9, -4.5, -9, -4.5, -9, -4.5, -9, | |
150 | -4.5, -9, -4.5, -9, -3, 0.0, 0.0, 0.0, 0.0, 0.0 }, | |
151 | ||
152 | { -9, -3, -9.5, -3, -9.5, -3, -9.5, -3, -9.5, -3, -9.5, | |
153 | -3, -9.5, -3, -9.5, -8.7, -7.9, -7.1, -6.3, 0. }, | |
154 | ||
155 | {-5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, | |
156 | -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5 }}; | |
157 | ||
158 | ||
159 | // Deposit in fAngles, fHeights | |
160 | ||
74ea065c | 161 | for (Int_t iplate = 0; iplate < kNPlates; iplate++) { |
162 | for (Int_t istrip = 0; istrip < kMaxNstrip; istrip++) { | |
163 | fAngles[iplate][istrip] = kangles[iplate][istrip]; | |
164 | fHeights[iplate][istrip] = kheights[iplate][istrip]; | |
0f4a7374 | 165 | } |
166 | } | |
167 | ||
74ea065c | 168 | fPhiSec = 360./kNSectors; |
169 | } | |
170 | ||
171 | //_____________________________________________________________________________ | |
172 | Float_t AliTOFGeometry::DistanceToPad(Int_t *det, Float_t *pos) | |
173 | { | |
174 | // | |
175 | // Returns distance of space point with coor pos (x,y,z) (cm) wrt | |
176 | // pad with Detector Indices idet (iSect,iPlate,iStrip,iPadX,iPadZ) | |
177 | // | |
178 | ||
179 | //Transform pos into Sector Frame | |
180 | ||
181 | Float_t x = pos[0]; | |
182 | Float_t y = pos[1]; | |
183 | Float_t z = pos[2]; | |
184 | ||
185 | Float_t radius = TMath::Sqrt(x*x+y*y); | |
186 | Float_t phi=TMath::ATan2(y,x); | |
187 | if(phi<0) phi=2.*TMath::Pi()+phi; | |
188 | // Get the local angle in the sector philoc | |
189 | Float_t angle = phi*kRaddeg-( Int_t (kRaddeg*phi/20.) + 0.5)*fPhiSec; | |
190 | Float_t xs = radius*TMath::Cos(angle/kRaddeg); | |
191 | Float_t ys = radius*TMath::Sin(angle/kRaddeg); | |
192 | Float_t zs = z; | |
193 | ||
194 | // Do the same for the selected pad | |
195 | ||
196 | Float_t g[3]; | |
197 | GetPos(det,g); | |
198 | ||
199 | Float_t padRadius = TMath::Sqrt(g[0]*g[0]+g[1]*g[1]); | |
200 | Float_t padPhi=TMath::ATan2(g[1],g[0]); | |
201 | if(padPhi<0) padPhi=2.*TMath::Pi()+padPhi; | |
202 | // Get the local angle in the sector philoc | |
203 | Float_t padAngle = padPhi*kRaddeg-( Int_t (padPhi*kRaddeg/20.)+ 0.5) * fPhiSec; | |
204 | Float_t padxs = padRadius*TMath::Cos(padAngle/kRaddeg); | |
205 | Float_t padys = padRadius*TMath::Sin(padAngle/kRaddeg); | |
206 | Float_t padzs = g[2]; | |
207 | ||
208 | //Now move to local pad coordinate frame. Translate: | |
209 | ||
210 | Float_t xt = xs-padxs; | |
211 | Float_t yt = ys-padys; | |
212 | Float_t zt = zs-padzs; | |
213 | //Now Rotate: | |
214 | ||
215 | Float_t alpha = GetAngles(det[1],det[2]); | |
216 | Float_t xr = xt*TMath::Cos(alpha/kRaddeg)+zt*TMath::Sin(alpha/kRaddeg); | |
217 | Float_t yr = yt; | |
218 | Float_t zr = -xt*TMath::Sin(alpha/kRaddeg)+zt*TMath::Cos(alpha/kRaddeg); | |
219 | ||
220 | Float_t dist = TMath::Sqrt(xr*xr+yr*yr+zr*zr); | |
221 | return dist; | |
222 | ||
223 | } | |
224 | ||
225 | ||
226 | //_____________________________________________________________________________ | |
227 | Bool_t AliTOFGeometry::IsInsideThePad(Int_t *det, Float_t *pos) | |
228 | { | |
229 | // | |
230 | // Returns true if space point with coor pos (x,y,z) (cm) falls | |
231 | // inside pad with Detector Indices idet (iSect,iPlate,iStrip,iPadX,iPadZ) | |
232 | // | |
233 | ||
234 | Bool_t isInside=false; | |
235 | ||
236 | ||
237 | //Transform pos into Sector Frame | |
238 | ||
239 | Float_t x = pos[0]; | |
240 | Float_t y = pos[1]; | |
241 | Float_t z = pos[2]; | |
242 | ||
243 | Float_t radius = TMath::Sqrt(x*x+y*y); | |
244 | Float_t phi=TMath::ATan2(y,x); | |
245 | if(phi<0) phi=2.*TMath::Pi()+phi; | |
246 | // Get the local angle in the sector philoc | |
247 | Float_t angle = phi*kRaddeg-( Int_t (kRaddeg*phi/20.) + 0.5) *fPhiSec; | |
248 | Float_t xs = radius*TMath::Cos(angle/kRaddeg); | |
249 | Float_t ys = radius*TMath::Sin(angle/kRaddeg); | |
250 | Float_t zs = z; | |
251 | ||
252 | // Do the same for the selected pad | |
253 | ||
254 | Float_t g[3]; | |
255 | GetPos(det,g); | |
256 | ||
257 | Float_t padRadius = TMath::Sqrt(g[0]*g[0]+g[1]*g[1]); | |
258 | Float_t padPhi=TMath::ATan2(g[1],g[0]); | |
259 | if(padPhi<0) padPhi=2.*TMath::Pi()+padPhi; | |
260 | // Get the local angle in the sector philoc | |
261 | Float_t padAngle = padPhi*kRaddeg-( Int_t (padPhi*kRaddeg/20.)+ 0.5) * fPhiSec; | |
262 | Float_t padxs = padRadius*TMath::Cos(padAngle/kRaddeg); | |
263 | Float_t padys = padRadius*TMath::Sin(padAngle/kRaddeg); | |
264 | Float_t padzs = g[2]; | |
265 | ||
266 | //Now move to local pad coordinate frame. Translate: | |
267 | ||
268 | Float_t xt = xs-padxs; | |
269 | Float_t yt = ys-padys; | |
270 | Float_t zt = zs-padzs; | |
271 | //Now Rotate: | |
272 | ||
273 | Float_t alpha = GetAngles(det[1],det[2]); | |
274 | Float_t xr = xt*TMath::Cos(alpha/kRaddeg)+zt*TMath::Sin(alpha/kRaddeg); | |
275 | Float_t yr = yt; | |
276 | Float_t zr = -xt*TMath::Sin(alpha/kRaddeg)+zt*TMath::Cos(alpha/kRaddeg); | |
277 | ||
9b49e4c9 | 278 | if(TMath::Abs(xr)<=0.75 && TMath::Abs(yr)<= (fgkXPad*0.5) && TMath::Abs(zr)<= (fgkZPad*0.5)) |
74ea065c | 279 | isInside=true; |
280 | return isInside; | |
281 | ||
0f4a7374 | 282 | } |
283 | ||
284 | //_____________________________________________________________________________ | |
285 | void AliTOFGeometry::GetPos(Int_t *det, Float_t *pos) | |
286 | { | |
287 | // | |
288 | // Returns space point coor (x,y,z) (cm) for Detector | |
289 | // Indices (iSect,iPlate,iStrip,iPadX,iPadZ) | |
290 | // | |
291 | ||
292 | pos[0]=GetX(det); | |
293 | pos[1]=GetY(det); | |
294 | pos[2]=GetZ(det); | |
295 | ||
296 | } | |
297 | //_____________________________________________________________________________ | |
298 | void AliTOFGeometry::GetDetID( Float_t *pos, Int_t *det) | |
299 | { | |
300 | // | |
301 | // Returns Detector Indices (iSect,iPlate,iStrip,iPadX,iPadZ) | |
302 | // space point coor (x,y,z) (cm) | |
303 | ||
304 | ||
305 | det[0]=GetSector(pos); | |
306 | det[1]=GetPlate(pos); | |
307 | det[2]=GetStrip(pos); | |
308 | det[3]=GetPadZ(pos); | |
309 | det[4]=GetPadX(pos); | |
310 | ||
311 | } | |
312 | //_____________________________________________________________________________ | |
313 | Float_t AliTOFGeometry::GetX(Int_t *det) | |
314 | { | |
315 | // | |
316 | // Returns X coordinate (cm) | |
317 | // | |
318 | ||
319 | Int_t isector = det[0]; | |
320 | Int_t iplate = det[1]; | |
321 | Int_t istrip = det[2]; | |
322 | Int_t ipadz = det[3]; | |
323 | Int_t ipadx = det[4]; | |
324 | ||
325 | // Find out distance d on the plane wrt median phi: | |
74ea065c | 326 | Float_t d = (ipadx+0.5)*fgkXPad-(kNpadX*fgkXPad)*0.5; |
0f4a7374 | 327 | |
328 | // The radius r in xy plane: | |
329 | Float_t r = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip]+ | |
330 | (ipadz-0.5)*fgkZPad*TMath::Sin(fAngles[iplate][istrip]/kRaddeg)-0.25; | |
331 | ||
332 | // local azimuthal angle in the sector philoc | |
333 | Float_t philoc = TMath:: ATan(d/r); | |
334 | ||
335 | // azimuthal angle in the global frame phi | |
336 | Float_t phi = philoc*kRaddeg+(isector+0.5 )*fPhiSec; | |
337 | ||
338 | Float_t xCoor = r/TMath::Cos(philoc)*TMath::Cos(phi/kRaddeg); | |
339 | return xCoor; | |
340 | ||
341 | } | |
342 | //_____________________________________________________________________________ | |
343 | Float_t AliTOFGeometry::GetY(Int_t *det) | |
344 | { | |
345 | // | |
346 | // Returns Y coordinate (cm) | |
347 | // | |
348 | ||
349 | Int_t isector = det[0]; | |
350 | Int_t iplate = det[1]; | |
351 | Int_t istrip = det[2]; | |
352 | Int_t ipadz = det[3]; | |
353 | Int_t ipadx = det[4]; | |
354 | ||
355 | // Find out distance d on the plane wrt median phi: | |
74ea065c | 356 | Float_t d = (ipadx+0.5)*fgkXPad-(kNpadX*fgkXPad)*0.5; |
0f4a7374 | 357 | |
358 | // The radius r in xy plane: | |
359 | Float_t r = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip]+ | |
360 | (ipadz-0.5)*fgkZPad*TMath::Sin(fAngles[iplate][istrip]/kRaddeg)-0.25; | |
361 | ||
362 | // local azimuthal angle in the sector philoc | |
363 | Float_t philoc = TMath:: ATan(d/r); | |
364 | ||
365 | // azimuthal angle in the global frame phi | |
366 | Float_t phi = philoc*kRaddeg+(isector+0.5 )*fPhiSec; | |
367 | ||
368 | Float_t yCoor = r/TMath::Cos(philoc)*TMath::Sin(phi/kRaddeg); | |
369 | return yCoor; | |
370 | ||
371 | } | |
372 | ||
373 | //_____________________________________________________________________________ | |
374 | Float_t AliTOFGeometry::GetZ(Int_t *det) | |
375 | { | |
376 | // | |
377 | // Returns Z coordinate (cm) | |
378 | // | |
379 | ||
380 | Int_t iplate = det[1]; | |
381 | Int_t istrip = det[2]; | |
382 | Int_t ipadz = det[3]; | |
383 | ||
384 | ||
385 | // The radius r in xy plane: | |
386 | Float_t r = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip]; | |
387 | ||
74ea065c | 388 | Float_t zCoor = r*TMath::Tan(0.5*TMath::Pi()-GetStripTheta(iplate,istrip))- |
0f4a7374 | 389 | (ipadz-0.5)*fgkZPad*TMath::Cos(fAngles[iplate][istrip]/kRaddeg); |
390 | return zCoor; | |
391 | ||
392 | } | |
393 | //_____________________________________________________________________________ | |
394 | Int_t AliTOFGeometry::GetSector(Float_t *pos) | |
395 | { | |
396 | // | |
397 | // Returns the Sector index | |
398 | // | |
399 | ||
400 | Int_t iSect = -1; | |
401 | ||
402 | Float_t x = pos[0]; | |
403 | Float_t y = pos[1]; | |
404 | ||
405 | Float_t phi = TMath::ATan2(y,x); | |
406 | if(phi<0.) phi=2.*TMath::Pi()+phi; | |
407 | iSect = (Int_t) (phi*kRaddeg/fPhiSec); | |
408 | ||
409 | return iSect; | |
410 | ||
411 | } | |
412 | //_____________________________________________________________________________ | |
413 | Int_t AliTOFGeometry::GetPadX(Float_t *pos) | |
414 | { | |
415 | // | |
416 | // Returns the Pad index along X | |
417 | // | |
418 | ||
419 | Int_t iPadX = -1; | |
420 | ||
421 | Float_t x = pos[0]; | |
422 | Float_t y = pos[1]; | |
423 | Float_t z = pos[2]; | |
424 | ||
425 | Int_t isector = GetSector(pos); | |
426 | if(isector == -1){ | |
427 | cout << "Detector Index could not be determined" << endl; | |
428 | return iPadX;} | |
429 | Int_t iplate = GetPlate(pos); | |
430 | if(iplate == -1){ | |
431 | cout << "Detector Index could not be determined" << endl; | |
432 | return iPadX;} | |
433 | Int_t istrip = GetStrip(pos); | |
434 | if(istrip == -1){ | |
435 | cout << "Detector Index could not be determined" << endl; | |
436 | return iPadX;} | |
437 | ||
438 | ||
439 | Float_t rho=TMath::Sqrt(x*x+y*y); | |
440 | Float_t phi = TMath::ATan2(y,x); | |
441 | if(phi<0.) phi=2.*TMath::Pi()+phi; | |
442 | ||
443 | // Get the local angle in the sector philoc | |
444 | Float_t philoc = phi*kRaddeg-(isector+0.5)*fPhiSec; | |
445 | philoc*=TMath::Pi()/180.; | |
446 | // theta projected on the median of the sector | |
447 | Float_t theta = TMath::ATan2(rho*TMath::Cos(philoc),z); | |
448 | // The radius r in xy plane: | |
449 | Float_t r = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip]+ | |
450 | (theta-GetStripTheta(iplate, istrip))/ | |
451 | (GetMaxStripTheta(iplate, istrip)-GetMinStripTheta(iplate, istrip)) | |
452 | * 2.*fgkZPad*TMath::Sin(fAngles[iplate][istrip]/kRaddeg)-0.25; | |
453 | ||
454 | // Find out distance projected onto the strip plane | |
74ea065c | 455 | Float_t d = (r*TMath::Tan(philoc)+(kNpadX*fgkXPad)*0.5); |
0f4a7374 | 456 | |
457 | iPadX = (Int_t) ( d/fgkXPad); | |
458 | return iPadX; | |
459 | ||
460 | } | |
461 | //_____________________________________________________________________________ | |
462 | Int_t AliTOFGeometry::GetPlate(Float_t *pos) | |
463 | { | |
464 | // | |
465 | // Returns the Plate index | |
466 | // | |
467 | Int_t iPlate=-1; | |
468 | ||
469 | Int_t isector = GetSector(pos); | |
470 | if(isector == -1){ | |
471 | cout << "Detector Index could not be determined" << endl; | |
472 | return iPlate;} | |
473 | ||
474 | Float_t x = pos[0]; | |
475 | Float_t y = pos[1]; | |
476 | Float_t z = pos[2]; | |
477 | ||
478 | Float_t rho=TMath::Sqrt(x*x+y*y); | |
479 | Float_t phi=TMath::ATan2(y,x); | |
480 | if(phi<0) phi=2.*TMath::Pi()+phi; | |
481 | // Get the local angle in the sector philoc | |
482 | Float_t philoc = phi*kRaddeg-(isector+0.5)*fPhiSec; | |
483 | philoc*=TMath::Pi()/180.; | |
484 | // theta projected on the median of the sector | |
485 | Float_t theta=TMath::ATan2(rho*TMath::Cos(philoc),z); | |
486 | ||
74ea065c | 487 | for (Int_t i=0; i<kNPlates; i++){ |
0f4a7374 | 488 | if ( GetMaxPlateTheta(i) >= theta && |
489 | GetMinPlateTheta(i) <= theta)iPlate=i; | |
490 | } | |
491 | ||
492 | return iPlate; | |
493 | ||
494 | } | |
495 | //_____________________________________________________________________________ | |
496 | Int_t AliTOFGeometry::GetStrip(Float_t *pos) | |
497 | { | |
498 | // | |
499 | // Returns the Strip index | |
500 | // | |
501 | ||
502 | Int_t iStrip=-1; | |
503 | ||
504 | ||
505 | Int_t isector = GetSector(pos); | |
506 | if(isector == -1){ | |
507 | cout << "Detector Index could not be determined" << endl; | |
508 | return iStrip;} | |
509 | Int_t iplate = GetPlate(pos); | |
510 | if(iplate == -1){ | |
511 | cout << "Detector Index could not be determined" << endl; | |
512 | return iStrip;} | |
513 | ||
514 | ||
515 | Float_t x = pos[0]; | |
516 | Float_t y = pos[1]; | |
517 | Float_t z = pos[2]; | |
518 | ||
519 | Int_t nstrips=0; | |
74ea065c | 520 | if(iplate==0 || iplate == 4)nstrips=kNStripC; |
521 | if(iplate==1 || iplate == 3)nstrips=kNStripB; | |
522 | if(iplate==2) nstrips=kNStripA; | |
0f4a7374 | 523 | |
524 | Float_t rho=TMath::Sqrt(x*x+y*y); | |
525 | Float_t phi=TMath::ATan2(y,x); | |
526 | if(phi<0) phi=2.*TMath::Pi()+phi; | |
527 | // Get the local angle in the sector philoc | |
528 | Float_t philoc = phi*kRaddeg-(isector+0.5)*fPhiSec; | |
529 | philoc*=TMath::Pi()/180.; | |
530 | // theta projected on the median of the sector | |
531 | Float_t theta=TMath::ATan2(rho*TMath::Cos(philoc),z); | |
532 | ||
533 | for (Int_t istrip=0; istrip<nstrips; istrip++){ | |
534 | ||
535 | if( | |
536 | GetMaxStripTheta(iplate,istrip) >= theta | |
537 | && | |
538 | GetMinStripTheta(iplate,istrip) <= theta ) iStrip = istrip; | |
539 | ||
540 | } | |
541 | ||
542 | return iStrip; | |
543 | } | |
544 | //_____________________________________________________________________________ | |
545 | Int_t AliTOFGeometry::GetPadZ(Float_t *pos) | |
546 | { | |
547 | // | |
548 | // Returns the Pad index along Z | |
549 | // | |
550 | Int_t iPadZ = -1; | |
551 | ||
552 | Int_t isector = GetSector(pos); | |
553 | if(isector == -1){ | |
554 | cout << "Detector Index could not be determined" << endl; | |
555 | return iPadZ;} | |
556 | Int_t iplate = GetPlate(pos); | |
557 | if(iplate == -1){ | |
558 | cout << "Detector Index could not be determined" << endl; | |
559 | return iPadZ;} | |
560 | Int_t istrip = GetStrip(pos); | |
561 | if(istrip == -1){ | |
562 | cout << "Detector Index could not be determined" << endl; | |
563 | return iPadZ;} | |
564 | ||
565 | ||
566 | Float_t x = pos[0]; | |
567 | Float_t y = pos[1]; | |
568 | Float_t z = pos[2]; | |
569 | ||
570 | Float_t rho=TMath::Sqrt(x*x+y*y); | |
571 | Float_t phi=TMath::ATan2(y,x); | |
572 | if(phi<0) phi=2.*TMath::Pi()+phi; | |
573 | Float_t philoc = phi*kRaddeg-(isector+0.5)*fPhiSec; | |
574 | philoc*=TMath::Pi()/180.; | |
575 | Float_t theta=TMath::ATan2(rho*TMath::Cos(philoc),z); | |
576 | ||
577 | if (theta >= GetStripTheta(iplate, istrip))iPadZ=1; | |
578 | else iPadZ=0; | |
579 | ||
580 | return iPadZ; | |
581 | } | |
582 | //_____________________________________________________________________________ | |
583 | Float_t AliTOFGeometry::GetMinPlateTheta(Int_t iPlate) | |
584 | { | |
585 | // | |
586 | // Returns the minimum theta angle of a given plate iPlate (rad) | |
587 | // | |
588 | ||
589 | ||
590 | Int_t index=0; | |
591 | ||
592 | Float_t delta =0.; | |
593 | if(iPlate==0)delta = -1. ; | |
594 | if(iPlate==1)delta = -0.5; | |
595 | if(iPlate==3)delta = +0.5; | |
596 | if(iPlate==4)delta = +1. ; | |
597 | ||
598 | Float_t z=(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][index]/kRaddeg)+delta; | |
599 | Float_t r=(fgkRmin+fgkRmax)/2.+fHeights[iPlate][index]; | |
600 | z =z+fgkZPad*TMath::Cos(fAngles[iPlate][index]/kRaddeg); | |
601 | r =r-fgkZPad*TMath::Sin(fAngles[iPlate][index]/kRaddeg); | |
602 | ||
603 | Float_t thmin = 0.5*TMath::Pi()-TMath::ATan(z/r)-fgkDprecMin; | |
604 | return thmin; | |
605 | ||
606 | } | |
607 | //_____________________________________________________________________________ | |
608 | Float_t AliTOFGeometry::GetMaxPlateTheta(Int_t iPlate) | |
609 | { | |
610 | // | |
611 | // Returns the maximum theta angle of a given plate iPlate (rad) | |
612 | ||
613 | Int_t index=0; | |
74ea065c | 614 | if(iPlate==0 ||iPlate == 4)index=kNStripC-1; |
615 | if(iPlate==1 ||iPlate == 3)index=kNStripB-1; | |
616 | if(iPlate==2) index=kNStripA-1; | |
0f4a7374 | 617 | |
618 | Float_t delta =0.; | |
619 | if(iPlate==0)delta = -1. ; | |
620 | if(iPlate==1)delta = -0.5; | |
621 | if(iPlate==3)delta = +0.5; | |
622 | if(iPlate==4)delta = +1. ; | |
623 | ||
624 | Float_t z=(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][index]/kRaddeg)+delta; | |
625 | Float_t r=(fgkRmin+fgkRmax)/2.+fHeights[iPlate][index]; | |
626 | z =z-fgkZPad*TMath::Cos(fAngles[iPlate][index]/kRaddeg); | |
627 | r= r+fgkZPad*TMath::Sin(fAngles[iPlate][index]/kRaddeg); | |
628 | ||
629 | Float_t thmax = 0.5*TMath::Pi()-TMath::ATan(z/r)+fgkDprecMax; | |
630 | return thmax; | |
631 | ||
632 | } | |
633 | //_____________________________________________________________________________ | |
634 | Float_t AliTOFGeometry::GetMaxStripTheta(Int_t iPlate, Int_t iStrip) | |
635 | { | |
636 | // | |
637 | // Returns the maximum theta angle of a given strip iStrip (rad) | |
638 | // | |
639 | ||
640 | ||
641 | Float_t delta =0.; | |
642 | if(iPlate==0)delta = -1. ; | |
643 | if(iPlate==1)delta = -0.5; | |
644 | if(iPlate==3)delta = +0.5; | |
645 | if(iPlate==4)delta = +1. ; | |
646 | ||
647 | Float_t r =(fgkRmin+fgkRmax)/2.+fHeights[iPlate][iStrip]; | |
648 | Float_t z =(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][iStrip]/kRaddeg)+delta; | |
649 | z = z-fgkZPad*TMath::Cos(fAngles[iPlate][iStrip]/kRaddeg); | |
650 | r = r+fgkZPad*TMath::Sin(fAngles[iPlate][iStrip]/kRaddeg); | |
651 | Float_t thmax =0.5*TMath::Pi()-TMath::ATan(z/r)+fgkDprecMax; | |
652 | return thmax; | |
653 | ||
654 | } | |
655 | ||
656 | //_____________________________________________________________________________ | |
657 | Float_t AliTOFGeometry::GetMinStripTheta(Int_t iPlate, Int_t iStrip) | |
658 | { | |
659 | // | |
660 | // Returns the minimum theta angle of a given Strip iStrip (rad) | |
661 | // | |
662 | ||
663 | ||
664 | Float_t delta =0.; | |
665 | if(iPlate==0)delta = -1. ; | |
666 | if(iPlate==1)delta = -0.5; | |
667 | if(iPlate==3)delta = +0.5; | |
668 | if(iPlate==4)delta = +1. ; | |
669 | ||
670 | ||
671 | Float_t r =(fgkRmin+fgkRmax)/2.+fHeights[iPlate][iStrip]; | |
672 | Float_t z =(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][iStrip]/kRaddeg)+delta; | |
673 | z =z+fgkZPad*TMath::Cos(fAngles[iPlate][iStrip]/kRaddeg); | |
674 | r =r-fgkZPad*TMath::Sin(fAngles[iPlate][iStrip]/kRaddeg); | |
675 | Float_t thmin =0.5*TMath::Pi()-TMath::ATan(z/r)-fgkDprecMin; | |
676 | ||
677 | return thmin; | |
678 | ||
679 | } | |
680 | ||
681 | ||
682 | //_____________________________________________________________________________ | |
683 | Float_t AliTOFGeometry::GetStripTheta(Int_t iPlate, Int_t iStrip) | |
684 | { | |
685 | // | |
686 | // returns the median theta angle of a given strip iStrip (rad) | |
687 | // | |
688 | ||
689 | ||
690 | Float_t delta =0.; | |
691 | if(iPlate==0)delta = -1. ; | |
692 | if(iPlate==1)delta = -0.5; | |
693 | if(iPlate==3)delta = +0.5; | |
694 | if(iPlate==4)delta = +1. ; | |
695 | ||
696 | Float_t r =(fgkRmin+fgkRmax)/2.+fHeights[iPlate][iStrip]; | |
697 | Float_t z =(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][iStrip]/kRaddeg)+delta; | |
698 | Float_t theta =0.5*TMath::Pi()-TMath::ATan(z/r); | |
699 | if(iPlate != 2){ | |
700 | if(theta > 0.5*TMath::Pi() )theta+=fgkDprecCen; | |
701 | if(theta < 0.5*TMath::Pi() )theta-=fgkDprecCen; | |
702 | } | |
703 | return theta; | |
704 | } | |
705 | ||
706 | ||
707 |