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022ee144 | 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 | // Implementation of the TPC transformation class | |
18 | // | |
19 | // Origin: Marian Ivanov Marian.Ivanov@cern.ch | |
20 | // Magnus Mager | |
21 | // | |
22 | // Class for tranformation of the coordinate frame | |
66954e3f | 23 | // Transformation |
022ee144 | 24 | // local coordinate frame (sector, padrow, pad, timebine) ==> |
25 | // rotated global (tracking) cooridnate frame (sector, lx,ly,lz) | |
26 | // | |
27 | // Unisochronity - (substract time0 - pad by pad) | |
28 | // Drift velocity - Currently common drift velocity - functionality of AliTPCParam | |
29 | // ExB effect - | |
30 | // | |
003b43ed | 31 | // Time of flight correction - |
32 | // - Depends on the vertex position | |
33 | // - by default | |
34 | // | |
022ee144 | 35 | // Usage: |
36 | // AliTPCclustererMI::AddCluster | |
37 | // AliTPCtrackerMI::Transform | |
38 | // | |
39 | //------------------------------------------------------- | |
c1bdda91 | 40 | |
41 | /* To test it: | |
42 | cdb=AliCDBManager::Instance() | |
43 | cdb->SetDefaultStorage("local:///u/mmager/mycalib1") | |
44 | c=AliTPCcalibDB::Instance() | |
45 | c->SetRun(0) | |
46 | Double_t x[]={1.0,2.0,3.0} | |
47 | Int_t i[]={4} | |
48 | AliTPCTransform trafo | |
49 | trafo.Transform(x,i,0,1) | |
50 | */ | |
51 | ||
022ee144 | 52 | /* $Id$ */ |
53 | ||
54 | #include "AliTPCROC.h" | |
55 | #include "AliTPCCalPad.h" | |
56 | #include "AliTPCCalROC.h" | |
57 | #include "AliTPCcalibDB.h" | |
58 | #include "AliTPCParam.h" | |
59 | #include "TMath.h" | |
60 | #include "AliLog.h" | |
61 | #include "AliTPCExB.h" | |
cf5b0aa0 | 62 | #include "AliTPCCorrection.h" |
66954e3f | 63 | #include "TGeoMatrix.h" |
9430b11a | 64 | #include "AliTPCRecoParam.h" |
65 | #include "AliTPCCalibVdrift.h" | |
022ee144 | 66 | #include "AliTPCTransform.h" |
0b736a46 | 67 | #include "AliMagF.h" |
68 | #include "TGeoGlobalMagField.h" | |
69 | #include "AliTracker.h" | |
1e6337b1 | 70 | #include <AliCTPTimeParams.h> |
022ee144 | 71 | |
66954e3f | 72 | ClassImp(AliTPCTransform) |
022ee144 | 73 | |
74 | ||
9430b11a | 75 | AliTPCTransform::AliTPCTransform(): |
76 | AliTransform(), | |
77 | fCurrentRecoParam(0), //! current reconstruction parameters | |
78 | fCurrentRun(0), //! current run | |
79 | fCurrentTimeStamp(0) //! current time stamp | |
80 | { | |
81 | // | |
82 | // Speed it up a bit! | |
83 | // | |
84 | for (Int_t i=0;i<18;++i) { | |
85 | Double_t alpha=TMath::DegToRad()*(10.+20.*(i%18)); | |
86 | fSins[i]=TMath::Sin(alpha); | |
87 | fCoss[i]=TMath::Cos(alpha); | |
88 | } | |
89 | fPrimVtx[0]=0; | |
90 | fPrimVtx[1]=0; | |
91 | fPrimVtx[2]=0; | |
92 | } | |
93 | AliTPCTransform::AliTPCTransform(const AliTPCTransform& transform): | |
94 | AliTransform(transform), | |
95 | fCurrentRecoParam(transform.fCurrentRecoParam), //! current reconstruction parameters | |
96 | fCurrentRun(transform.fCurrentRun), //! current run | |
97 | fCurrentTimeStamp(transform.fCurrentTimeStamp) //! current time stamp | |
003b43ed | 98 | { |
24db6af7 | 99 | // |
c1bdda91 | 100 | // Speed it up a bit! |
24db6af7 | 101 | // |
c1bdda91 | 102 | for (Int_t i=0;i<18;++i) { |
103 | Double_t alpha=TMath::DegToRad()*(10.+20.*(i%18)); | |
104 | fSins[i]=TMath::Sin(alpha); | |
105 | fCoss[i]=TMath::Cos(alpha); | |
106 | } | |
003b43ed | 107 | fPrimVtx[0]=0; |
108 | fPrimVtx[1]=0; | |
109 | fPrimVtx[2]=0; | |
c1bdda91 | 110 | } |
111 | ||
112 | AliTPCTransform::~AliTPCTransform() { | |
24db6af7 | 113 | // |
114 | // Destructor | |
115 | // | |
c1bdda91 | 116 | } |
117 | ||
003b43ed | 118 | void AliTPCTransform::SetPrimVertex(Double_t *vtx){ |
119 | // | |
120 | // | |
121 | // | |
122 | fPrimVtx[0]=vtx[0]; | |
123 | fPrimVtx[1]=vtx[1]; | |
124 | fPrimVtx[2]=vtx[2]; | |
125 | } | |
126 | ||
127 | ||
24db6af7 | 128 | void AliTPCTransform::Transform(Double_t *x,Int_t *i,UInt_t /*time*/, |
003b43ed | 129 | Int_t /*coordinateType*/) { |
24db6af7 | 130 | // input: x[0] - pad row |
131 | // x[1] - pad | |
c1bdda91 | 132 | // x[2] - time in us |
133 | // i[0] - sector | |
134 | // output: x[0] - x (all in the rotated global coordinate frame) | |
135 | // x[1] - y | |
136 | // x[2] - z | |
ecc5dd8f | 137 | // |
138 | // primvtx - position of the primary vertex | |
139 | // used for the TOF correction | |
140 | // TOF of particle calculated assuming the speed-of-light and | |
141 | // line approximation | |
142 | // | |
143 | ||
24db6af7 | 144 | Int_t row=TMath::Nint(x[0]); |
145 | Int_t pad=TMath::Nint(x[1]); | |
c1bdda91 | 146 | Int_t sector=i[0]; |
9430b11a | 147 | AliTPCcalibDB* calib=AliTPCcalibDB::Instance(); |
24db6af7 | 148 | // |
149 | AliTPCCalPad * time0TPC = calib->GetPadTime0(); | |
2293155b | 150 | AliTPCCalPad * distortionMapY = calib->GetDistortionMap(0); |
151 | AliTPCCalPad * distortionMapZ = calib->GetDistortionMap(1); | |
4486a91f | 152 | AliTPCCalPad * distortionMapR = calib->GetDistortionMap(2); |
24db6af7 | 153 | AliTPCParam * param = calib->GetParameters(); |
0b736a46 | 154 | AliTPCCorrection * correction = calib->GetTPCComposedCorrection(); // first user defined correction // if does not exist try to get it from calibDB array |
155 | if (!correction) correction = calib->GetTPCComposedCorrection(AliTracker::GetBz()); | |
24db6af7 | 156 | if (!time0TPC){ |
157 | AliFatal("Time unisochronity missing"); | |
158 | } | |
c1bdda91 | 159 | |
24db6af7 | 160 | if (!param){ |
161 | AliFatal("Parameters missing"); | |
162 | } | |
c1bdda91 | 163 | |
24db6af7 | 164 | Double_t xx[3]; |
165 | // Apply Time0 correction - Pad by pad fluctuation | |
166 | // | |
9fb81082 | 167 | x[2]-=time0TPC->GetCalROC(sector)->GetValue(row,pad); |
24db6af7 | 168 | // |
169 | // Tranform from pad - time coordinate system to the rotated global (tracking) system | |
170 | // | |
171 | Local2RotatedGlobal(sector,x); | |
172 | // | |
173 | // | |
174 | // | |
c1bdda91 | 175 | // Alignment |
176 | //TODO: calib->GetParameters()->GetClusterMatrix(sector)->LocalToMaster(x,xx); | |
c1bdda91 | 177 | RotatedGlobal2Global(sector,x); |
cf5b0aa0 | 178 | |
24db6af7 | 179 | // |
cf5b0aa0 | 180 | // old ExB correction |
24db6af7 | 181 | // |
3ce45991 | 182 | if(fCurrentRecoParam&&fCurrentRecoParam->GetUseExBCorrection()) { |
183 | ||
184 | calib->GetExB()->Correct(x,xx); | |
185 | ||
186 | } else { | |
187 | ||
188 | xx[0] = x[0]; | |
189 | xx[1] = x[1]; | |
190 | xx[2] = x[2]; | |
191 | } | |
192 | ||
cf5b0aa0 | 193 | // |
194 | // new composed correction - will replace soon ExB correction | |
195 | // | |
196 | if(fCurrentRecoParam&&fCurrentRecoParam->GetUseComposedCorrection()&&correction) { | |
197 | Float_t distPoint[3]={xx[0],xx[1],xx[2]}; | |
198 | correction->CorrectPoint(distPoint, sector); | |
199 | xx[0]=distPoint[0]; | |
200 | xx[1]=distPoint[1]; | |
201 | xx[2]=distPoint[2]; | |
202 | } | |
203 | ||
204 | ||
ecc5dd8f | 205 | // |
206 | // Time of flight correction | |
003b43ed | 207 | // |
9430b11a | 208 | if (fCurrentRecoParam&&fCurrentRecoParam->GetUseTOFCorrection()){ |
209 | const Int_t kNIS=param->GetNInnerSector(), kNOS=param->GetNOuterSector(); | |
210 | Float_t sign=1; | |
211 | if (sector < kNIS) { | |
212 | sign = (sector < kNIS/2) ? 1 : -1; | |
213 | } else { | |
214 | sign = ((sector-kNIS) < kNOS/2) ? 1 : -1; | |
215 | } | |
216 | Float_t deltaDr =0; | |
217 | Float_t dist=0; | |
218 | dist+=(fPrimVtx[0]-x[0])*(fPrimVtx[0]-x[0]); | |
219 | dist+=(fPrimVtx[1]-x[1])*(fPrimVtx[1]-x[1]); | |
220 | dist+=(fPrimVtx[2]-x[2])*(fPrimVtx[2]-x[2]); | |
221 | dist = TMath::Sqrt(dist); | |
222 | // drift length correction because of TOF | |
223 | // the drift velocity is in cm/s therefore multiplication by 0.01 | |
224 | deltaDr = (dist*(0.01*param->GetDriftV()))/TMath::C(); | |
225 | xx[2]+=sign*deltaDr; | |
ecc5dd8f | 226 | } |
9430b11a | 227 | // |
228 | // | |
229 | // | |
230 | ||
ecc5dd8f | 231 | // |
c1bdda91 | 232 | Global2RotatedGlobal(sector,xx); |
2293155b | 233 | |
234 | // | |
235 | // Apply non linear distortion correction | |
236 | // | |
237 | if (distortionMapY ){ | |
0b736a46 | 238 | // wt - to get it form the OCDB |
239 | // ignore T1 and T2 | |
240 | AliMagF* magF= (AliMagF*)TGeoGlobalMagField::Instance()->GetField(); | |
241 | Double_t bzField = magF->SolenoidField()/10.; //field in T | |
242 | Double_t vdrift = param->GetDriftV()/1000000.; // [cm/us] // From dataBase: to be updated: per second (ideally) | |
243 | Double_t ezField = 400; // [V/cm] // to be updated: never (hopefully) | |
244 | if (sector%36<18) ezField*=-1; | |
245 | Double_t wt = -10.0 * (bzField*10) * vdrift / ezField ; | |
246 | Double_t c0=1./(1.+wt*wt); | |
247 | Double_t c1=wt/c0; | |
248 | ||
2293155b | 249 | //can be switch on for each dimension separatelly |
4486a91f | 250 | if (fCurrentRecoParam->GetUseFieldCorrection()&0x2) |
0b736a46 | 251 | if (distortionMapY){ |
252 | xx[1]-= c0*distortionMapY->GetCalROC(sector)->GetValue(row,pad); | |
253 | xx[0]-= c1*distortionMapY->GetCalROC(sector)->GetValue(row,pad); | |
254 | } | |
2293155b | 255 | if (fCurrentRecoParam->GetUseFieldCorrection()&0x4) |
4486a91f | 256 | if (distortionMapZ) |
257 | xx[2]-=distortionMapZ->GetCalROC(sector)->GetValue(row,pad); | |
258 | if (fCurrentRecoParam->GetUseFieldCorrection()&0x8) | |
0b736a46 | 259 | if (distortionMapR){ |
260 | xx[0]-= c0*distortionMapR->GetCalROC(sector)->GetValue(row,pad); | |
261 | xx[1]-=-c1*distortionMapR->GetCalROC(sector)->GetValue(row,pad)*wt; | |
262 | } | |
263 | ||
2293155b | 264 | } |
4486a91f | 265 | // |
2293155b | 266 | |
003b43ed | 267 | // |
c1bdda91 | 268 | x[0]=xx[0];x[1]=xx[1];x[2]=xx[2]; |
269 | } | |
270 | ||
24db6af7 | 271 | void AliTPCTransform::Local2RotatedGlobal(Int_t sector, Double_t *x) const { |
272 | // | |
273 | // | |
022ee144 | 274 | // Tranform coordinate from |
275 | // row, pad, time to x,y,z | |
24db6af7 | 276 | // |
022ee144 | 277 | // Drift Velocity |
278 | // Current implementation - common drift velocity - for full chamber | |
24db6af7 | 279 | // TODO: use a map or parametrisation! |
280 | // | |
281 | // | |
282 | // | |
9430b11a | 283 | const Int_t kMax =60; // cache for 60 seconds |
284 | static Int_t lastStamp=-1; //cached values | |
285 | static Double_t lastCorr = 1; | |
286 | // | |
66954e3f | 287 | AliTPCcalibDB* calib=AliTPCcalibDB::Instance(); |
24db6af7 | 288 | AliTPCParam * param = calib->GetParameters(); |
9430b11a | 289 | AliTPCCalibVdrift *driftCalib = AliTPCcalibDB::Instance()->GetVdrift(fCurrentRun); |
290 | Double_t driftCorr = 1.; | |
291 | if (driftCalib){ | |
292 | // | |
293 | // caching drift correction - temp. fix | |
294 | // Extremally slow procedure | |
295 | if ( TMath::Abs((lastStamp)-Int_t(fCurrentTimeStamp))<kMax){ | |
296 | driftCorr = lastCorr; | |
297 | }else{ | |
298 | driftCorr = 1.+(driftCalib->GetPTRelative(fCurrentTimeStamp,0)+ driftCalib->GetPTRelative(fCurrentTimeStamp,1))*0.5; | |
299 | lastCorr=driftCorr; | |
300 | lastStamp=fCurrentTimeStamp; | |
301 | ||
302 | } | |
303 | } | |
43a74775 | 304 | // |
a8f8b6a1 | 305 | // simple caching non thread save |
306 | static Double_t vdcorrectionTime=1; | |
5647625c | 307 | static Double_t vdcorrectionTimeGY=0; |
a8f8b6a1 | 308 | static Double_t time0corrTime=0; |
309 | static Int_t lastStampT=-1; | |
310 | // | |
817766d5 | 311 | if (lastStampT!=(Int_t)fCurrentTimeStamp){ |
a8f8b6a1 | 312 | lastStampT=fCurrentTimeStamp; |
313 | if(fCurrentRecoParam&&fCurrentRecoParam->GetUseDriftCorrectionTime()>0) { | |
314 | vdcorrectionTime = (1+AliTPCcalibDB::Instance()-> | |
315 | GetVDriftCorrectionTime(fCurrentTimeStamp, | |
fefec90f | 316 | fCurrentRun, |
a8f8b6a1 | 317 | sector%36>=18, |
318 | fCurrentRecoParam->GetUseDriftCorrectionTime())); | |
319 | time0corrTime= AliTPCcalibDB::Instance()-> | |
320 | GetTime0CorrectionTime(fCurrentTimeStamp, | |
fefec90f | 321 | fCurrentRun, |
a8f8b6a1 | 322 | sector%36>=18, |
323 | fCurrentRecoParam->GetUseDriftCorrectionTime()); | |
324 | } | |
325 | // | |
326 | if(fCurrentRecoParam&&fCurrentRecoParam->GetUseDriftCorrectionGY()>0) { | |
a8f8b6a1 | 327 | |
5647625c | 328 | Double_t corrGy= AliTPCcalibDB::Instance()-> |
a8f8b6a1 | 329 | GetVDriftCorrectionGy(fCurrentTimeStamp, |
330 | AliTPCcalibDB::Instance()->GetRun(), | |
331 | sector%36>=18, | |
5647625c | 332 | fCurrentRecoParam->GetUseDriftCorrectionGY()); |
333 | vdcorrectionTimeGY = corrGy; | |
a8f8b6a1 | 334 | } |
43a74775 | 335 | } |
9430b11a | 336 | |
337 | ||
24db6af7 | 338 | if (!param){ |
339 | AliFatal("Parameters missing"); | |
340 | } | |
341 | Int_t row=TMath::Nint(x[0]); | |
9389f9a4 | 342 | // Int_t pad=TMath::Nint(x[1]); |
24db6af7 | 343 | // |
344 | const Int_t kNIS=param->GetNInnerSector(), kNOS=param->GetNOuterSector(); | |
345 | Double_t sign = 1.; | |
502d13b5 | 346 | Double_t zwidth = param->GetZWidth()*driftCorr; |
5647625c | 347 | Float_t xyzPad[3]; |
348 | AliTPCROC::Instance()->GetPositionGlobal(sector, TMath::Nint(x[0]) ,TMath::Nint(x[1]), xyzPad); | |
349 | if (AliTPCRecoParam:: GetUseTimeCalibration()) zwidth*=vdcorrectionTime*(1+xyzPad[1]*vdcorrectionTimeGY); | |
24db6af7 | 350 | Double_t padWidth = 0; |
351 | Double_t padLength = 0; | |
352 | Double_t maxPad = 0; | |
353 | // | |
354 | if (sector < kNIS) { | |
355 | maxPad = param->GetNPadsLow(row); | |
356 | sign = (sector < kNIS/2) ? 1 : -1; | |
357 | padLength = param->GetPadPitchLength(sector,row); | |
358 | padWidth = param->GetPadPitchWidth(sector); | |
359 | } else { | |
360 | maxPad = param->GetNPadsUp(row); | |
361 | sign = ((sector-kNIS) < kNOS/2) ? 1 : -1; | |
362 | padLength = param->GetPadPitchLength(sector,row); | |
363 | padWidth = param->GetPadPitchWidth(sector); | |
364 | } | |
365 | // | |
366 | // X coordinate | |
022ee144 | 367 | x[0] = param->GetPadRowRadii(sector,row); // padrow X position - ideal |
24db6af7 | 368 | // |
369 | // Y coordinate | |
370 | // | |
371 | x[1]=(x[1]-0.5*maxPad)*padWidth; | |
afbaa016 | 372 | // pads are mirrorred on C-side |
373 | if (sector%36>17){ | |
374 | x[1]*=-1; | |
375 | } | |
376 | ||
377 | // | |
378 | ||
24db6af7 | 379 | // |
380 | // Z coordinate | |
381 | // | |
1e6337b1 | 382 | if (AliTPCcalibDB::Instance()->IsTrgL0()){ |
383 | // by defualt we assume L1 trigger is used - make a correction in case of L0 | |
384 | AliCTPTimeParams* ctp = AliTPCcalibDB::Instance()->GetCTPTimeParams(); | |
3d1b41c1 | 385 | if (ctp){ |
386 | //for TPC standalone runs no ctp info | |
387 | Double_t delay = ctp->GetDelayL1L0()*0.000000025; | |
388 | x[2]-=delay/param->GetTSample(); | |
389 | } | |
1e6337b1 | 390 | } |
391 | x[2]-= param->GetNTBinsL1(); | |
24db6af7 | 392 | x[2]*= zwidth; // tranform time bin to the distance to the ROC |
1e6337b1 | 393 | x[2]-= 3.*param->GetZSigma() + time0corrTime; |
24db6af7 | 394 | // subtract the time offsets |
395 | x[2] = sign*( param->GetZLength(sector) - x[2]); | |
c1bdda91 | 396 | } |
397 | ||
c2da420d | 398 | void AliTPCTransform::RotatedGlobal2Global(Int_t sector,Double_t *x) const { |
24db6af7 | 399 | // |
400 | // transform possition rotated global to the global | |
401 | // | |
c1bdda91 | 402 | Double_t cos,sin; |
403 | GetCosAndSin(sector,cos,sin); | |
404 | Double_t tmp=x[0]; | |
e81544f7 | 405 | x[0]= cos*tmp-sin*x[1]; |
406 | x[1]=+sin*tmp+cos*x[1]; | |
c1bdda91 | 407 | } |
408 | ||
c2da420d | 409 | void AliTPCTransform::Global2RotatedGlobal(Int_t sector,Double_t *x) const { |
24db6af7 | 410 | // |
411 | // tranform possition Global2RotatedGlobal | |
412 | // | |
c1bdda91 | 413 | Double_t cos,sin; |
414 | GetCosAndSin(sector,cos,sin); | |
415 | Double_t tmp=x[0]; | |
e81544f7 | 416 | x[0]= cos*tmp+sin*x[1]; |
417 | x[1]= -sin*tmp+cos*x[1]; | |
c1bdda91 | 418 | } |
419 | ||
c2da420d | 420 | void AliTPCTransform::GetCosAndSin(Int_t sector,Double_t &cos, |
c1bdda91 | 421 | Double_t &sin) const { |
422 | cos=fCoss[sector%18]; | |
423 | sin=fSins[sector%18]; | |
424 | } | |
425 | ||
c1bdda91 | 426 | |
43a74775 | 427 | void AliTPCTransform::ApplyTransformations(Double_t */*xyz*/, Int_t /*volID*/){ |
428 | // | |
429 | // Modify global position | |
430 | // xyz - global xyz position | |
431 | // volID - volID of detector (sector number) | |
432 | // | |
433 | // | |
434 | ||
435 | } |