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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 | $Log$ | |
43f77f2d | 18 | Revision 1.7 2004/11/05 07:20:08 decaro |
19 | TOF library splitting and conversion of some printout messages in AliLog schema (T.Kuhr) | |
20 | ||
d076c8d5 | 21 | Revision 1.6 2004/06/15 15:27:59 decaro |
22 | TOF raw data: preliminary implementation and style changes | |
23 | ||
7e6dce66 | 24 | Revision 1.5 2004/04/20 14:37:22 hristov |
25 | Using TMath::Abs instead of fabs, arrays of variable size created/deleted correctly (HP,Sun) | |
26 | ||
9b49e4c9 | 27 | Revision 1.4 2004/04/13 09:42:51 decaro |
28 | Track reconstruction code for TOF: updating | |
29 | ||
74ea065c | 30 | Revision 1.3 2003/12/29 18:40:39 hristov |
31 | Copy/paste error corrected | |
32 | ||
fb9747d4 | 33 | Revision 1.2 2003/12/29 17:26:01 hristov |
34 | Using enum to initaialize static ints in the header file, the initialization of static floats moved to the implementation file | |
35 | ||
58eb5b61 | 36 | Revision 1.1 2003/12/29 15:18:03 decaro |
37 | TOF geometry updating (addition of AliTOFGeometry) | |
38 | ||
7e6dce66 | 39 | Revision 0.05 2004/6/11 A.De Caro |
40 | Implement Global method NpadXStrip | |
41 | Insert four float constants (originally in AliTOF class) | |
42 | Revision 0.04 2004/4/05 S.Arcelli | |
74ea065c | 43 | Implement Global methods IsInsideThePad |
44 | DistanceToPad | |
7e6dce66 | 45 | Revision 0.03 2003/12/14 S.Arcelli |
46 | Set Phi range [-180,180]->[0,360] | |
47 | Revision 0.02 2003/12/10 S.Arcelli: | |
48 | Implement Global methods GetPos & GetDetID | |
49 | Revision 0.01 2003/12/04 S.Arcelli | |
0f4a7374 | 50 | */ |
51 | ||
52 | #include <stdlib.h> | |
53 | #include <Riostream.h> | |
54 | /////////////////////////////////////////////////////////////////////////////// | |
55 | // // | |
56 | // TOF Geometry class // | |
57 | // // | |
58 | /////////////////////////////////////////////////////////////////////////////// | |
59 | ||
d076c8d5 | 60 | #include "AliLog.h" |
0f4a7374 | 61 | #include "AliConst.h" |
62 | #include "AliTOFGeometry.h" | |
63 | ||
64 | ClassImp(AliTOFGeometry) | |
65 | ||
7e6dce66 | 66 | const Int_t AliTOFGeometry::fgkTimeDiff = 25000; // Min signal separation (ps) |
58eb5b61 | 67 | |
7e6dce66 | 68 | const Float_t AliTOFGeometry::fgkxTOF = 371.; // Inner radius of the TOF for Reconstruction (cm) |
69 | const Float_t AliTOFGeometry::fgkRmin = 370.; // Inner radius of the TOF (cm) | |
70 | const Float_t AliTOFGeometry::fgkRmax = 399; // Outer radius of the TOF (cm) | |
71 | const Float_t AliTOFGeometry::fgkZlenA = 106.0; // length (cm) of the A module | |
72 | const Float_t AliTOFGeometry::fgkZlenB = 141.0; // length (cm) of the B module | |
73 | const Float_t AliTOFGeometry::fgkZlenC = 177.5; // length (cm) of the C module | |
74 | const Float_t AliTOFGeometry::fgkXPad = 2.5; // Pad size in the x direction (cm) | |
75 | const Float_t AliTOFGeometry::fgkZPad = 3.5; // Pad size in the z direction (cm) | |
76 | const Float_t AliTOFGeometry::fgkMaxhZtof = 371.5; // Max half z-size of TOF (cm) | |
77 | const Float_t AliTOFGeometry::fgkStripLength = 122.;// Strip Length (rho X phi direction) (cm) | |
78 | const Float_t AliTOFGeometry::fgkDeadBndX = 1.0; // Dead Boundaries of a Strip along X direction (length) (cm) | |
79 | const Float_t AliTOFGeometry::fgkDeadBndZ = 1.5; // Dead Boundaries of a Strip along Z direction (width) (cm) | |
80 | const Float_t AliTOFGeometry::fgkOverSpc = 15.3; // Space available for sensitive layers in radial direction (cm) | |
58eb5b61 | 81 | |
82 | ||
fb9747d4 | 83 | const Float_t AliTOFGeometry::fgkSigmaForTail1= 2.;//Sig1 for simulation of TDC tails |
84 | const Float_t AliTOFGeometry::fgkSigmaForTail2= 0.5;//Sig2 for simulation of TDC tails | |
85 | const Float_t AliTOFGeometry::fgkSpeedOfLight = 0.299792458;// c (10^9 m/s) | |
86 | const Float_t AliTOFGeometry::fgkPionMass = 0.13957;// pion mass (Gev/c^2) | |
87 | const Float_t AliTOFGeometry::fgkKaonMass = 0.49368;// kaon mass (Gev/c^2) | |
88 | const Float_t AliTOFGeometry::fgkProtonMass = 0.93827;// proton mass (Gev/c^2) | |
89 | const Float_t AliTOFGeometry::fgkElectronMass = 0.00051;// electron mass (Gev/c^2) | |
90 | const Float_t AliTOFGeometry::fgkMuonMass = 0.10566;// muon mass (Gev/c^2) | |
58eb5b61 | 91 | |
92 | ||
fb9747d4 | 93 | const Float_t AliTOFGeometry::fgkDprecMin = 0.0000075;//num.prec.tolerance on Thmin |
94 | const Float_t AliTOFGeometry::fgkDprecMax = 0.0000100;//num.prec.tolerance on Thma | |
95 | const Float_t AliTOFGeometry::fgkDprecCen = 0.0000005;//num.prec.tolerance on <Theta> | |
58eb5b61 | 96 | |
43f77f2d | 97 | const Float_t AliTOFGeometry::fgkTdcBin = 24.4; // time-window for the TDC bins [ps] |
98 | ||
0f4a7374 | 99 | //_____________________________________________________________________________ |
100 | AliTOFGeometry::AliTOFGeometry() | |
101 | { | |
102 | // | |
103 | // AliTOFGeometry default constructor | |
104 | // | |
105 | Init(); | |
106 | ||
107 | } | |
108 | ||
109 | //_____________________________________________________________________________ | |
110 | AliTOFGeometry::~AliTOFGeometry() | |
111 | { | |
112 | // | |
113 | // AliTOFGeometry destructor | |
114 | // | |
115 | ||
116 | } | |
117 | //_____________________________________________________________________________ | |
118 | void AliTOFGeometry::Init() | |
119 | { | |
120 | // | |
121 | // Initialize strip Tilt Angles and Heights | |
122 | // | |
123 | // Strips Tilt Angles | |
124 | ||
74ea065c | 125 | Float_t const kangles[kNPlates][kMaxNstrip] ={ |
0f4a7374 | 126 | |
127 | {44.494, 43.725, 42.946, 42.156, 41.357, 40.548, 39.729, 38.899, | |
128 | 38.060, 37.211, 36.353, 35.484, 34.606, 33.719, 32.822, 31.916, | |
129 | 31.001, 30.077, 29.144, 28.202 }, | |
130 | ||
131 | {26.884, 25.922, 24.952, 23.975, 22.989, 22.320, 21.016, 20.309, | |
132 | 19.015, 18.270, 16.989, 16.205, 14.941, 14.117, 12.871, 12.008, | |
133 | 10.784, 9.8807, 8.681, 0.0 }, | |
134 | ||
135 | { 7.5835, 6.4124, 5.4058, 4.2809, 3.2448, 2.1424, 1.078, -0., -1.078, | |
136 | -2.1424, -3.2448, -4.2809, -5.4058, -6.4124, -7.5835, 0.0, 0.0, 0.0, | |
137 | 0.0, 0.0 }, | |
138 | ||
139 | {-8.681, -9.8807, -10.784, -12.008, -12.871, -14.117, -14.941, -16.205, | |
140 | -16.989, -18.27, -19.015, -20.309, -21.016, -22.32, -22.989, | |
141 | -23.975, -24.952, -25.922, -26.884, 0. }, | |
142 | ||
143 | {-28.202, -29.144, -30.077, -31.001, -31.916, -32.822, -33.719, -34.606, | |
144 | -35.484, -36.353, -37.211, -38.06, -38.899, -39.729, -40.548, | |
145 | -41.357, -42.156, -42.946, -43.725, -44.494 }}; | |
146 | ||
147 | ||
148 | //Strips Heights | |
149 | ||
74ea065c | 150 | Float_t const kheights[kNPlates][kMaxNstrip]= { |
0f4a7374 | 151 | |
152 | {-5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, | |
153 | -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5 }, | |
154 | ||
155 | {-6.3, -7.1, -7.9, -8.7, -9.5, -3, -9.5, -3, -9.5, -3, | |
156 | -9.5, -3.0, -9.5, -3.0, -9.5, -3, -9.5, -3, -9 , 0.}, | |
157 | ||
158 | { -3, -9, -4.5, -9, -4.5, -9, -4.5, -9, -4.5, -9, | |
159 | -4.5, -9, -4.5, -9, -3, 0.0, 0.0, 0.0, 0.0, 0.0 }, | |
160 | ||
161 | { -9, -3, -9.5, -3, -9.5, -3, -9.5, -3, -9.5, -3, -9.5, | |
162 | -3, -9.5, -3, -9.5, -8.7, -7.9, -7.1, -6.3, 0. }, | |
163 | ||
164 | {-5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, | |
165 | -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5 }}; | |
166 | ||
167 | ||
168 | // Deposit in fAngles, fHeights | |
169 | ||
74ea065c | 170 | for (Int_t iplate = 0; iplate < kNPlates; iplate++) { |
171 | for (Int_t istrip = 0; istrip < kMaxNstrip; istrip++) { | |
172 | fAngles[iplate][istrip] = kangles[iplate][istrip]; | |
173 | fHeights[iplate][istrip] = kheights[iplate][istrip]; | |
0f4a7374 | 174 | } |
175 | } | |
176 | ||
74ea065c | 177 | fPhiSec = 360./kNSectors; |
178 | } | |
179 | ||
180 | //_____________________________________________________________________________ | |
181 | Float_t AliTOFGeometry::DistanceToPad(Int_t *det, Float_t *pos) | |
182 | { | |
183 | // | |
184 | // Returns distance of space point with coor pos (x,y,z) (cm) wrt | |
185 | // pad with Detector Indices idet (iSect,iPlate,iStrip,iPadX,iPadZ) | |
186 | // | |
187 | ||
188 | //Transform pos into Sector Frame | |
189 | ||
190 | Float_t x = pos[0]; | |
191 | Float_t y = pos[1]; | |
192 | Float_t z = pos[2]; | |
193 | ||
194 | Float_t radius = TMath::Sqrt(x*x+y*y); | |
195 | Float_t phi=TMath::ATan2(y,x); | |
196 | if(phi<0) phi=2.*TMath::Pi()+phi; | |
197 | // Get the local angle in the sector philoc | |
198 | Float_t angle = phi*kRaddeg-( Int_t (kRaddeg*phi/20.) + 0.5)*fPhiSec; | |
199 | Float_t xs = radius*TMath::Cos(angle/kRaddeg); | |
200 | Float_t ys = radius*TMath::Sin(angle/kRaddeg); | |
201 | Float_t zs = z; | |
202 | ||
203 | // Do the same for the selected pad | |
204 | ||
205 | Float_t g[3]; | |
206 | GetPos(det,g); | |
207 | ||
208 | Float_t padRadius = TMath::Sqrt(g[0]*g[0]+g[1]*g[1]); | |
209 | Float_t padPhi=TMath::ATan2(g[1],g[0]); | |
210 | if(padPhi<0) padPhi=2.*TMath::Pi()+padPhi; | |
211 | // Get the local angle in the sector philoc | |
212 | Float_t padAngle = padPhi*kRaddeg-( Int_t (padPhi*kRaddeg/20.)+ 0.5) * fPhiSec; | |
213 | Float_t padxs = padRadius*TMath::Cos(padAngle/kRaddeg); | |
214 | Float_t padys = padRadius*TMath::Sin(padAngle/kRaddeg); | |
215 | Float_t padzs = g[2]; | |
216 | ||
217 | //Now move to local pad coordinate frame. Translate: | |
218 | ||
219 | Float_t xt = xs-padxs; | |
220 | Float_t yt = ys-padys; | |
221 | Float_t zt = zs-padzs; | |
222 | //Now Rotate: | |
223 | ||
224 | Float_t alpha = GetAngles(det[1],det[2]); | |
225 | Float_t xr = xt*TMath::Cos(alpha/kRaddeg)+zt*TMath::Sin(alpha/kRaddeg); | |
226 | Float_t yr = yt; | |
227 | Float_t zr = -xt*TMath::Sin(alpha/kRaddeg)+zt*TMath::Cos(alpha/kRaddeg); | |
228 | ||
229 | Float_t dist = TMath::Sqrt(xr*xr+yr*yr+zr*zr); | |
230 | return dist; | |
231 | ||
232 | } | |
233 | ||
234 | ||
235 | //_____________________________________________________________________________ | |
236 | Bool_t AliTOFGeometry::IsInsideThePad(Int_t *det, Float_t *pos) | |
237 | { | |
238 | // | |
239 | // Returns true if space point with coor pos (x,y,z) (cm) falls | |
240 | // inside pad with Detector Indices idet (iSect,iPlate,iStrip,iPadX,iPadZ) | |
241 | // | |
242 | ||
243 | Bool_t isInside=false; | |
244 | ||
245 | ||
246 | //Transform pos into Sector Frame | |
247 | ||
248 | Float_t x = pos[0]; | |
249 | Float_t y = pos[1]; | |
250 | Float_t z = pos[2]; | |
251 | ||
252 | Float_t radius = TMath::Sqrt(x*x+y*y); | |
253 | Float_t phi=TMath::ATan2(y,x); | |
254 | if(phi<0) phi=2.*TMath::Pi()+phi; | |
255 | // Get the local angle in the sector philoc | |
256 | Float_t angle = phi*kRaddeg-( Int_t (kRaddeg*phi/20.) + 0.5) *fPhiSec; | |
257 | Float_t xs = radius*TMath::Cos(angle/kRaddeg); | |
258 | Float_t ys = radius*TMath::Sin(angle/kRaddeg); | |
259 | Float_t zs = z; | |
260 | ||
261 | // Do the same for the selected pad | |
262 | ||
263 | Float_t g[3]; | |
264 | GetPos(det,g); | |
265 | ||
266 | Float_t padRadius = TMath::Sqrt(g[0]*g[0]+g[1]*g[1]); | |
267 | Float_t padPhi=TMath::ATan2(g[1],g[0]); | |
268 | if(padPhi<0) padPhi=2.*TMath::Pi()+padPhi; | |
269 | // Get the local angle in the sector philoc | |
270 | Float_t padAngle = padPhi*kRaddeg-( Int_t (padPhi*kRaddeg/20.)+ 0.5) * fPhiSec; | |
271 | Float_t padxs = padRadius*TMath::Cos(padAngle/kRaddeg); | |
272 | Float_t padys = padRadius*TMath::Sin(padAngle/kRaddeg); | |
273 | Float_t padzs = g[2]; | |
274 | ||
275 | //Now move to local pad coordinate frame. Translate: | |
276 | ||
277 | Float_t xt = xs-padxs; | |
278 | Float_t yt = ys-padys; | |
279 | Float_t zt = zs-padzs; | |
280 | //Now Rotate: | |
281 | ||
282 | Float_t alpha = GetAngles(det[1],det[2]); | |
283 | Float_t xr = xt*TMath::Cos(alpha/kRaddeg)+zt*TMath::Sin(alpha/kRaddeg); | |
284 | Float_t yr = yt; | |
285 | Float_t zr = -xt*TMath::Sin(alpha/kRaddeg)+zt*TMath::Cos(alpha/kRaddeg); | |
286 | ||
9b49e4c9 | 287 | if(TMath::Abs(xr)<=0.75 && TMath::Abs(yr)<= (fgkXPad*0.5) && TMath::Abs(zr)<= (fgkZPad*0.5)) |
74ea065c | 288 | isInside=true; |
289 | return isInside; | |
290 | ||
0f4a7374 | 291 | } |
292 | ||
293 | //_____________________________________________________________________________ | |
294 | void AliTOFGeometry::GetPos(Int_t *det, Float_t *pos) | |
295 | { | |
296 | // | |
297 | // Returns space point coor (x,y,z) (cm) for Detector | |
298 | // Indices (iSect,iPlate,iStrip,iPadX,iPadZ) | |
299 | // | |
300 | ||
301 | pos[0]=GetX(det); | |
302 | pos[1]=GetY(det); | |
303 | pos[2]=GetZ(det); | |
304 | ||
305 | } | |
306 | //_____________________________________________________________________________ | |
307 | void AliTOFGeometry::GetDetID( Float_t *pos, Int_t *det) | |
308 | { | |
309 | // | |
310 | // Returns Detector Indices (iSect,iPlate,iStrip,iPadX,iPadZ) | |
311 | // space point coor (x,y,z) (cm) | |
312 | ||
313 | ||
314 | det[0]=GetSector(pos); | |
315 | det[1]=GetPlate(pos); | |
316 | det[2]=GetStrip(pos); | |
317 | det[3]=GetPadZ(pos); | |
318 | det[4]=GetPadX(pos); | |
319 | ||
320 | } | |
321 | //_____________________________________________________________________________ | |
322 | Float_t AliTOFGeometry::GetX(Int_t *det) | |
323 | { | |
324 | // | |
325 | // Returns X coordinate (cm) | |
326 | // | |
327 | ||
328 | Int_t isector = det[0]; | |
329 | Int_t iplate = det[1]; | |
330 | Int_t istrip = det[2]; | |
331 | Int_t ipadz = det[3]; | |
332 | Int_t ipadx = det[4]; | |
333 | ||
334 | // Find out distance d on the plane wrt median phi: | |
74ea065c | 335 | Float_t d = (ipadx+0.5)*fgkXPad-(kNpadX*fgkXPad)*0.5; |
0f4a7374 | 336 | |
337 | // The radius r in xy plane: | |
338 | Float_t r = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip]+ | |
339 | (ipadz-0.5)*fgkZPad*TMath::Sin(fAngles[iplate][istrip]/kRaddeg)-0.25; | |
340 | ||
341 | // local azimuthal angle in the sector philoc | |
342 | Float_t philoc = TMath:: ATan(d/r); | |
343 | ||
344 | // azimuthal angle in the global frame phi | |
345 | Float_t phi = philoc*kRaddeg+(isector+0.5 )*fPhiSec; | |
346 | ||
347 | Float_t xCoor = r/TMath::Cos(philoc)*TMath::Cos(phi/kRaddeg); | |
348 | return xCoor; | |
349 | ||
350 | } | |
351 | //_____________________________________________________________________________ | |
352 | Float_t AliTOFGeometry::GetY(Int_t *det) | |
353 | { | |
354 | // | |
355 | // Returns Y coordinate (cm) | |
356 | // | |
357 | ||
358 | Int_t isector = det[0]; | |
359 | Int_t iplate = det[1]; | |
360 | Int_t istrip = det[2]; | |
361 | Int_t ipadz = det[3]; | |
362 | Int_t ipadx = det[4]; | |
363 | ||
364 | // Find out distance d on the plane wrt median phi: | |
74ea065c | 365 | Float_t d = (ipadx+0.5)*fgkXPad-(kNpadX*fgkXPad)*0.5; |
0f4a7374 | 366 | |
367 | // The radius r in xy plane: | |
368 | Float_t r = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip]+ | |
369 | (ipadz-0.5)*fgkZPad*TMath::Sin(fAngles[iplate][istrip]/kRaddeg)-0.25; | |
370 | ||
371 | // local azimuthal angle in the sector philoc | |
372 | Float_t philoc = TMath:: ATan(d/r); | |
373 | ||
374 | // azimuthal angle in the global frame phi | |
375 | Float_t phi = philoc*kRaddeg+(isector+0.5 )*fPhiSec; | |
376 | ||
377 | Float_t yCoor = r/TMath::Cos(philoc)*TMath::Sin(phi/kRaddeg); | |
378 | return yCoor; | |
379 | ||
380 | } | |
381 | ||
382 | //_____________________________________________________________________________ | |
383 | Float_t AliTOFGeometry::GetZ(Int_t *det) | |
384 | { | |
385 | // | |
386 | // Returns Z coordinate (cm) | |
387 | // | |
388 | ||
389 | Int_t iplate = det[1]; | |
390 | Int_t istrip = det[2]; | |
391 | Int_t ipadz = det[3]; | |
392 | ||
393 | ||
394 | // The radius r in xy plane: | |
395 | Float_t r = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip]; | |
396 | ||
74ea065c | 397 | Float_t zCoor = r*TMath::Tan(0.5*TMath::Pi()-GetStripTheta(iplate,istrip))- |
0f4a7374 | 398 | (ipadz-0.5)*fgkZPad*TMath::Cos(fAngles[iplate][istrip]/kRaddeg); |
399 | return zCoor; | |
400 | ||
401 | } | |
402 | //_____________________________________________________________________________ | |
403 | Int_t AliTOFGeometry::GetSector(Float_t *pos) | |
404 | { | |
405 | // | |
406 | // Returns the Sector index | |
407 | // | |
408 | ||
409 | Int_t iSect = -1; | |
410 | ||
411 | Float_t x = pos[0]; | |
412 | Float_t y = pos[1]; | |
413 | ||
414 | Float_t phi = TMath::ATan2(y,x); | |
415 | if(phi<0.) phi=2.*TMath::Pi()+phi; | |
416 | iSect = (Int_t) (phi*kRaddeg/fPhiSec); | |
417 | ||
418 | return iSect; | |
419 | ||
420 | } | |
421 | //_____________________________________________________________________________ | |
422 | Int_t AliTOFGeometry::GetPadX(Float_t *pos) | |
423 | { | |
424 | // | |
425 | // Returns the Pad index along X | |
426 | // | |
427 | ||
428 | Int_t iPadX = -1; | |
429 | ||
430 | Float_t x = pos[0]; | |
431 | Float_t y = pos[1]; | |
432 | Float_t z = pos[2]; | |
433 | ||
434 | Int_t isector = GetSector(pos); | |
435 | if(isector == -1){ | |
d076c8d5 | 436 | AliError("Detector Index could not be determined"); |
0f4a7374 | 437 | return iPadX;} |
438 | Int_t iplate = GetPlate(pos); | |
439 | if(iplate == -1){ | |
d076c8d5 | 440 | AliError("Detector Index could not be determined"); |
0f4a7374 | 441 | return iPadX;} |
442 | Int_t istrip = GetStrip(pos); | |
443 | if(istrip == -1){ | |
d076c8d5 | 444 | AliError("Detector Index could not be determined"); |
0f4a7374 | 445 | return iPadX;} |
446 | ||
447 | ||
448 | Float_t rho=TMath::Sqrt(x*x+y*y); | |
449 | Float_t phi = TMath::ATan2(y,x); | |
450 | if(phi<0.) phi=2.*TMath::Pi()+phi; | |
451 | ||
452 | // Get the local angle in the sector philoc | |
453 | Float_t philoc = phi*kRaddeg-(isector+0.5)*fPhiSec; | |
454 | philoc*=TMath::Pi()/180.; | |
455 | // theta projected on the median of the sector | |
456 | Float_t theta = TMath::ATan2(rho*TMath::Cos(philoc),z); | |
457 | // The radius r in xy plane: | |
458 | Float_t r = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip]+ | |
459 | (theta-GetStripTheta(iplate, istrip))/ | |
460 | (GetMaxStripTheta(iplate, istrip)-GetMinStripTheta(iplate, istrip)) | |
461 | * 2.*fgkZPad*TMath::Sin(fAngles[iplate][istrip]/kRaddeg)-0.25; | |
462 | ||
463 | // Find out distance projected onto the strip plane | |
74ea065c | 464 | Float_t d = (r*TMath::Tan(philoc)+(kNpadX*fgkXPad)*0.5); |
0f4a7374 | 465 | |
466 | iPadX = (Int_t) ( d/fgkXPad); | |
467 | return iPadX; | |
468 | ||
469 | } | |
470 | //_____________________________________________________________________________ | |
471 | Int_t AliTOFGeometry::GetPlate(Float_t *pos) | |
472 | { | |
473 | // | |
474 | // Returns the Plate index | |
475 | // | |
476 | Int_t iPlate=-1; | |
477 | ||
478 | Int_t isector = GetSector(pos); | |
479 | if(isector == -1){ | |
d076c8d5 | 480 | AliError("Detector Index could not be determined"); |
0f4a7374 | 481 | return iPlate;} |
482 | ||
483 | Float_t x = pos[0]; | |
484 | Float_t y = pos[1]; | |
485 | Float_t z = pos[2]; | |
486 | ||
487 | Float_t rho=TMath::Sqrt(x*x+y*y); | |
488 | Float_t phi=TMath::ATan2(y,x); | |
489 | if(phi<0) phi=2.*TMath::Pi()+phi; | |
490 | // Get the local angle in the sector philoc | |
491 | Float_t philoc = phi*kRaddeg-(isector+0.5)*fPhiSec; | |
492 | philoc*=TMath::Pi()/180.; | |
493 | // theta projected on the median of the sector | |
494 | Float_t theta=TMath::ATan2(rho*TMath::Cos(philoc),z); | |
495 | ||
74ea065c | 496 | for (Int_t i=0; i<kNPlates; i++){ |
0f4a7374 | 497 | if ( GetMaxPlateTheta(i) >= theta && |
498 | GetMinPlateTheta(i) <= theta)iPlate=i; | |
499 | } | |
500 | ||
501 | return iPlate; | |
502 | ||
503 | } | |
504 | //_____________________________________________________________________________ | |
505 | Int_t AliTOFGeometry::GetStrip(Float_t *pos) | |
506 | { | |
507 | // | |
508 | // Returns the Strip index | |
509 | // | |
510 | ||
511 | Int_t iStrip=-1; | |
512 | ||
513 | ||
514 | Int_t isector = GetSector(pos); | |
515 | if(isector == -1){ | |
d076c8d5 | 516 | AliError("Detector Index could not be determined"); |
0f4a7374 | 517 | return iStrip;} |
518 | Int_t iplate = GetPlate(pos); | |
519 | if(iplate == -1){ | |
d076c8d5 | 520 | AliError("Detector Index could not be determined"); |
0f4a7374 | 521 | return iStrip;} |
522 | ||
523 | ||
524 | Float_t x = pos[0]; | |
525 | Float_t y = pos[1]; | |
526 | Float_t z = pos[2]; | |
527 | ||
528 | Int_t nstrips=0; | |
74ea065c | 529 | if(iplate==0 || iplate == 4)nstrips=kNStripC; |
530 | if(iplate==1 || iplate == 3)nstrips=kNStripB; | |
531 | if(iplate==2) nstrips=kNStripA; | |
0f4a7374 | 532 | |
533 | Float_t rho=TMath::Sqrt(x*x+y*y); | |
534 | Float_t phi=TMath::ATan2(y,x); | |
535 | if(phi<0) phi=2.*TMath::Pi()+phi; | |
536 | // Get the local angle in the sector philoc | |
537 | Float_t philoc = phi*kRaddeg-(isector+0.5)*fPhiSec; | |
538 | philoc*=TMath::Pi()/180.; | |
539 | // theta projected on the median of the sector | |
540 | Float_t theta=TMath::ATan2(rho*TMath::Cos(philoc),z); | |
541 | ||
542 | for (Int_t istrip=0; istrip<nstrips; istrip++){ | |
543 | ||
544 | if( | |
545 | GetMaxStripTheta(iplate,istrip) >= theta | |
546 | && | |
547 | GetMinStripTheta(iplate,istrip) <= theta ) iStrip = istrip; | |
548 | ||
549 | } | |
550 | ||
551 | return iStrip; | |
552 | } | |
553 | //_____________________________________________________________________________ | |
554 | Int_t AliTOFGeometry::GetPadZ(Float_t *pos) | |
555 | { | |
556 | // | |
557 | // Returns the Pad index along Z | |
558 | // | |
559 | Int_t iPadZ = -1; | |
560 | ||
561 | Int_t isector = GetSector(pos); | |
562 | if(isector == -1){ | |
d076c8d5 | 563 | AliError("Detector Index could not be determined"); |
0f4a7374 | 564 | return iPadZ;} |
565 | Int_t iplate = GetPlate(pos); | |
566 | if(iplate == -1){ | |
d076c8d5 | 567 | AliError("Detector Index could not be determined"); |
0f4a7374 | 568 | return iPadZ;} |
569 | Int_t istrip = GetStrip(pos); | |
570 | if(istrip == -1){ | |
d076c8d5 | 571 | AliError("Detector Index could not be determined"); |
0f4a7374 | 572 | return iPadZ;} |
573 | ||
574 | ||
575 | Float_t x = pos[0]; | |
576 | Float_t y = pos[1]; | |
577 | Float_t z = pos[2]; | |
578 | ||
579 | Float_t rho=TMath::Sqrt(x*x+y*y); | |
580 | Float_t phi=TMath::ATan2(y,x); | |
581 | if(phi<0) phi=2.*TMath::Pi()+phi; | |
582 | Float_t philoc = phi*kRaddeg-(isector+0.5)*fPhiSec; | |
583 | philoc*=TMath::Pi()/180.; | |
584 | Float_t theta=TMath::ATan2(rho*TMath::Cos(philoc),z); | |
585 | ||
586 | if (theta >= GetStripTheta(iplate, istrip))iPadZ=1; | |
587 | else iPadZ=0; | |
588 | ||
589 | return iPadZ; | |
590 | } | |
591 | //_____________________________________________________________________________ | |
592 | Float_t AliTOFGeometry::GetMinPlateTheta(Int_t iPlate) | |
593 | { | |
594 | // | |
595 | // Returns the minimum theta angle of a given plate iPlate (rad) | |
596 | // | |
597 | ||
598 | ||
599 | Int_t index=0; | |
600 | ||
601 | Float_t delta =0.; | |
602 | if(iPlate==0)delta = -1. ; | |
603 | if(iPlate==1)delta = -0.5; | |
604 | if(iPlate==3)delta = +0.5; | |
605 | if(iPlate==4)delta = +1. ; | |
606 | ||
607 | Float_t z=(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][index]/kRaddeg)+delta; | |
608 | Float_t r=(fgkRmin+fgkRmax)/2.+fHeights[iPlate][index]; | |
609 | z =z+fgkZPad*TMath::Cos(fAngles[iPlate][index]/kRaddeg); | |
610 | r =r-fgkZPad*TMath::Sin(fAngles[iPlate][index]/kRaddeg); | |
611 | ||
612 | Float_t thmin = 0.5*TMath::Pi()-TMath::ATan(z/r)-fgkDprecMin; | |
613 | return thmin; | |
614 | ||
615 | } | |
616 | //_____________________________________________________________________________ | |
617 | Float_t AliTOFGeometry::GetMaxPlateTheta(Int_t iPlate) | |
618 | { | |
619 | // | |
620 | // Returns the maximum theta angle of a given plate iPlate (rad) | |
621 | ||
622 | Int_t index=0; | |
74ea065c | 623 | if(iPlate==0 ||iPlate == 4)index=kNStripC-1; |
624 | if(iPlate==1 ||iPlate == 3)index=kNStripB-1; | |
625 | if(iPlate==2) index=kNStripA-1; | |
0f4a7374 | 626 | |
627 | Float_t delta =0.; | |
628 | if(iPlate==0)delta = -1. ; | |
629 | if(iPlate==1)delta = -0.5; | |
630 | if(iPlate==3)delta = +0.5; | |
631 | if(iPlate==4)delta = +1. ; | |
632 | ||
633 | Float_t z=(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][index]/kRaddeg)+delta; | |
634 | Float_t r=(fgkRmin+fgkRmax)/2.+fHeights[iPlate][index]; | |
635 | z =z-fgkZPad*TMath::Cos(fAngles[iPlate][index]/kRaddeg); | |
636 | r= r+fgkZPad*TMath::Sin(fAngles[iPlate][index]/kRaddeg); | |
637 | ||
638 | Float_t thmax = 0.5*TMath::Pi()-TMath::ATan(z/r)+fgkDprecMax; | |
639 | return thmax; | |
640 | ||
641 | } | |
642 | //_____________________________________________________________________________ | |
643 | Float_t AliTOFGeometry::GetMaxStripTheta(Int_t iPlate, Int_t iStrip) | |
644 | { | |
645 | // | |
646 | // Returns the maximum theta angle of a given strip iStrip (rad) | |
647 | // | |
648 | ||
649 | ||
650 | Float_t delta =0.; | |
651 | if(iPlate==0)delta = -1. ; | |
652 | if(iPlate==1)delta = -0.5; | |
653 | if(iPlate==3)delta = +0.5; | |
654 | if(iPlate==4)delta = +1. ; | |
655 | ||
656 | Float_t r =(fgkRmin+fgkRmax)/2.+fHeights[iPlate][iStrip]; | |
657 | Float_t z =(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][iStrip]/kRaddeg)+delta; | |
658 | z = z-fgkZPad*TMath::Cos(fAngles[iPlate][iStrip]/kRaddeg); | |
659 | r = r+fgkZPad*TMath::Sin(fAngles[iPlate][iStrip]/kRaddeg); | |
660 | Float_t thmax =0.5*TMath::Pi()-TMath::ATan(z/r)+fgkDprecMax; | |
661 | return thmax; | |
662 | ||
663 | } | |
664 | ||
665 | //_____________________________________________________________________________ | |
666 | Float_t AliTOFGeometry::GetMinStripTheta(Int_t iPlate, Int_t iStrip) | |
667 | { | |
668 | // | |
669 | // Returns the minimum theta angle of a given Strip iStrip (rad) | |
670 | // | |
671 | ||
672 | ||
673 | Float_t delta =0.; | |
674 | if(iPlate==0)delta = -1. ; | |
675 | if(iPlate==1)delta = -0.5; | |
676 | if(iPlate==3)delta = +0.5; | |
677 | if(iPlate==4)delta = +1. ; | |
678 | ||
679 | ||
680 | Float_t r =(fgkRmin+fgkRmax)/2.+fHeights[iPlate][iStrip]; | |
681 | Float_t z =(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][iStrip]/kRaddeg)+delta; | |
682 | z =z+fgkZPad*TMath::Cos(fAngles[iPlate][iStrip]/kRaddeg); | |
683 | r =r-fgkZPad*TMath::Sin(fAngles[iPlate][iStrip]/kRaddeg); | |
684 | Float_t thmin =0.5*TMath::Pi()-TMath::ATan(z/r)-fgkDprecMin; | |
685 | ||
686 | return thmin; | |
687 | ||
688 | } | |
689 | ||
690 | ||
691 | //_____________________________________________________________________________ | |
692 | Float_t AliTOFGeometry::GetStripTheta(Int_t iPlate, Int_t iStrip) | |
693 | { | |
694 | // | |
695 | // returns the median theta angle of a given strip iStrip (rad) | |
696 | // | |
697 | ||
698 | ||
699 | Float_t delta =0.; | |
700 | if(iPlate==0)delta = -1. ; | |
701 | if(iPlate==1)delta = -0.5; | |
702 | if(iPlate==3)delta = +0.5; | |
703 | if(iPlate==4)delta = +1. ; | |
704 | ||
705 | Float_t r =(fgkRmin+fgkRmax)/2.+fHeights[iPlate][iStrip]; | |
706 | Float_t z =(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][iStrip]/kRaddeg)+delta; | |
707 | Float_t theta =0.5*TMath::Pi()-TMath::ATan(z/r); | |
708 | if(iPlate != 2){ | |
709 | if(theta > 0.5*TMath::Pi() )theta+=fgkDprecCen; | |
710 | if(theta < 0.5*TMath::Pi() )theta-=fgkDprecCen; | |
711 | } | |
712 | return theta; | |
713 | } | |
714 | ||
715 | ||
716 |