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572f41f9 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-2007, 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 | /* $Id$ */ | |
17 | ||
18 | /////////////////////////////////////////////////////////////////////////////// | |
19 | // // | |
20 | // ITS cluster error and shape parameterization // | |
21 | // // | |
22 | // andrea.dainese@lnl.infn.it // | |
23 | /////////////////////////////////////////////////////////////////////////////// | |
24 | //#include "TFile.h" | |
25 | //#include "TTree.h" | |
26 | //#include <TVectorF.h> | |
27 | //#include <TLinearFitter.h> | |
28 | //#include <TH1F.h> | |
29 | //#include <TProfile2D.h> | |
e50912db | 30 | #include <TVector3.h> |
572f41f9 | 31 | #include "TMath.h" |
d9ead1a0 | 32 | #include "AliTracker.h" |
e50912db | 33 | #include "AliGeomManager.h" |
572f41f9 | 34 | #include "AliITSRecPoint.h" |
35 | #include "AliITSClusterParam.h" | |
e50912db | 36 | #include "AliITSReconstructor.h" |
37 | #include "AliExternalTrackParam.h" | |
12cc92e0 | 38 | #include "AliCheb3DCalc.h" |
572f41f9 | 39 | |
40 | ClassImp(AliITSClusterParam) | |
41 | ||
42 | ||
43 | AliITSClusterParam* AliITSClusterParam::fgInstance = 0; | |
44 | ||
45 | ||
46 | /* | |
47 | Example usage fitting parameterization (NOT YET...): | |
48 | TFile fres("resol.root"); //tree with resolution and shape | |
49 | TTree * treeRes =(TTree*)fres.Get("Resol"); | |
50 | ||
51 | AliITSClusterParam param; | |
52 | param.SetInstance(¶m); | |
53 | param.FitResol(treeRes); | |
54 | param.FitRMS(treeRes); | |
55 | TFile fparam("ITSClusterParam.root","recreate"); | |
56 | param.Write("Param"); | |
57 | // | |
58 | // | |
59 | TFile fparam("ITSClusterParam.root"); | |
60 | AliITSClusterParam *param2 = (AliITSClusterParam *) fparam.Get("Param"); | |
61 | param2->SetInstance(param2); | |
62 | param2->Test(treeRes); | |
63 | ||
64 | ||
65 | treeRes->Draw("(Resol-AliITSClusterParam::SGetError0(Dim,Pad,Zm,AngleM))/Resol","Dim==0&&QMean<0") | |
66 | */ | |
67 | ||
68 | //------------------------------------------------------------------------- | |
69 | AliITSClusterParam* AliITSClusterParam::Instance() | |
70 | { | |
71 | // | |
72 | // Singleton implementation | |
73 | // Returns an instance of this class, it is created if neccessary | |
74 | // | |
75 | if (fgInstance == 0){ | |
76 | fgInstance = new AliITSClusterParam(); | |
77 | } | |
78 | return fgInstance; | |
79 | } | |
80 | //------------------------------------------------------------------------- | |
81 | void AliITSClusterParam::GetNTeor(Int_t layer,const AliITSRecPoint* /*cl*/, | |
e50912db | 82 | Float_t tgl,Float_t tgphitr, |
572f41f9 | 83 | Float_t &ny,Float_t &nz) |
84 | { | |
85 | // | |
e50912db | 86 | // Get "mean shape" (original parametrization from AliITStrackerMI) |
572f41f9 | 87 | // |
e50912db | 88 | tgl = TMath::Abs(tgl); |
89 | tgphitr = TMath::Abs(tgphitr); | |
90 | ||
91 | // SPD | |
92 | if (layer==0) { | |
93 | ny = 1.+tgphitr*3.2; | |
94 | nz = 1.+tgl*0.34; | |
572f41f9 | 95 | return; |
96 | } | |
e50912db | 97 | if (layer==1) { |
98 | ny = 1.+tgphitr*3.2; | |
99 | nz = 1.+tgl*0.28; | |
572f41f9 | 100 | return; |
101 | } | |
e50912db | 102 | // SSD |
103 | if (layer==4 || layer==5) { | |
104 | ny = 2.02+tgphitr*1.95; | |
105 | nz = 2.02+tgphitr*2.35; | |
572f41f9 | 106 | return; |
107 | } | |
e50912db | 108 | // SDD |
109 | ny = 6.6-2.7*tgphitr; | |
110 | nz = 2.8-3.11*tgphitr+0.45*tgl; | |
111 | return; | |
112 | } | |
113 | //-------------------------------------------------------------------------- | |
114 | Int_t AliITSClusterParam::GetError(Int_t layer, | |
115 | const AliITSRecPoint *cl, | |
116 | Float_t tgl,Float_t tgphitr,Float_t expQ, | |
d9ead1a0 | 117 | Float_t &erry,Float_t &errz,Float_t &covyz, |
8c139cf3 | 118 | Bool_t addMisalErr) |
e50912db | 119 | { |
120 | // | |
121 | // Calculate cluster position error | |
122 | // | |
b80c197e | 123 | static Double_t bz = (Double_t)AliTracker::GetBz(); |
401eff16 | 124 | Int_t retval=0; |
d9ead1a0 | 125 | covyz=0.; |
e50912db | 126 | switch(AliITSReconstructor::GetRecoParam()->GetClusterErrorsParam()) { |
127 | case 0: | |
d9ead1a0 | 128 | retval = GetErrorOrigRecPoint(cl,erry,errz,covyz); |
e50912db | 129 | break; |
130 | case 1: | |
401eff16 | 131 | retval = GetErrorParamMI(layer,cl,tgl,tgphitr,expQ,erry,errz); |
e50912db | 132 | break; |
133 | case 2: | |
401eff16 | 134 | retval = GetErrorParamAngle(layer,cl,tgl,tgphitr,erry,errz); |
e50912db | 135 | break; |
12cc92e0 | 136 | case 3: |
137 | retval = GetErrorParamAngleOld(layer,cl,tgl,tgphitr,erry,errz); | |
138 | break; | |
e50912db | 139 | default: |
401eff16 | 140 | retval = GetErrorParamMI(layer,cl,tgl,tgphitr,expQ,erry,errz); |
e50912db | 141 | break; |
142 | } | |
143 | ||
d9ead1a0 | 144 | // for SSD use the error provided by the cluster finder |
145 | // if single-sided clusters are enabled | |
146 | if(layer>=4 && AliITSReconstructor::GetRecoParam()->GetUseBadChannelsInClusterFinderSSD()) { | |
147 | //printf("error 1 erry errz covyz %10.7f %10.7f %15.13f\n",erry,errz,covyz); | |
148 | retval = GetErrorOrigRecPoint(cl,erry,errz,covyz); | |
149 | //printf("type %d erry errz covyz %10.7f %10.7f %15.13f\n",cl->GetType(),erry,errz,covyz); | |
150 | } | |
151 | ||
8c139cf3 | 152 | if(addMisalErr) { |
153 | // add error due to misalignment (to be improved) | |
d9ead1a0 | 154 | Float_t errmisalY2 = AliITSReconstructor::GetRecoParam()->GetClusterMisalErrorY(layer,bz) |
155 | *AliITSReconstructor::GetRecoParam()->GetClusterMisalErrorY(layer,bz); | |
156 | Float_t errmisalZ2 = AliITSReconstructor::GetRecoParam()->GetClusterMisalErrorZ(layer,bz) | |
157 | *AliITSReconstructor::GetRecoParam()->GetClusterMisalErrorZ(layer,bz); | |
f9119eb9 | 158 | erry = TMath::Sqrt(erry*erry+errmisalY2); |
159 | errz = TMath::Sqrt(errz*errz+errmisalZ2); | |
8c139cf3 | 160 | } |
401eff16 | 161 | |
162 | return retval; | |
163 | ||
572f41f9 | 164 | } |
165 | //-------------------------------------------------------------------------- | |
e50912db | 166 | Int_t AliITSClusterParam::GetErrorOrigRecPoint(const AliITSRecPoint*cl, |
d9ead1a0 | 167 | Float_t &erry,Float_t &errz,Float_t &covyz) |
572f41f9 | 168 | { |
e50912db | 169 | // |
170 | // Calculate cluster position error (just take error from AliITSRecPoint) | |
171 | // | |
172 | erry = TMath::Sqrt(cl->GetSigmaY2()); | |
173 | errz = TMath::Sqrt(cl->GetSigmaZ2()); | |
d9ead1a0 | 174 | covyz = cl->GetSigmaYZ(); |
e50912db | 175 | |
176 | return 1; | |
177 | } | |
178 | //-------------------------------------------------------------------------- | |
179 | Int_t AliITSClusterParam::GetErrorParamMI(Int_t layer,const AliITSRecPoint*cl, | |
180 | Float_t tgl,Float_t tgphitr, | |
181 | Float_t expQ, | |
182 | Float_t &erry,Float_t &errz) | |
183 | { | |
184 | // | |
185 | // Calculate cluster position error (original parametrization from | |
186 | // AliITStrackerMI) | |
572f41f9 | 187 | // |
188 | Float_t nz,ny; | |
e50912db | 189 | GetNTeor(layer, cl,tgl,tgphitr,ny,nz); |
572f41f9 | 190 | erry = TMath::Sqrt(cl->GetSigmaY2()); |
191 | errz = TMath::Sqrt(cl->GetSigmaZ2()); | |
192 | // | |
193 | // PIXELS | |
194 | if (layer<2){ | |
195 | if (TMath::Abs(ny-cl->GetNy())>0.6) { | |
196 | if (ny<cl->GetNy()){ | |
197 | erry*=0.4+TMath::Abs(ny-cl->GetNy()); | |
198 | errz*=0.4+TMath::Abs(ny-cl->GetNy()); | |
199 | }else{ | |
200 | erry*=0.7+0.5*TMath::Abs(ny-cl->GetNy()); | |
201 | errz*=0.7+0.5*TMath::Abs(ny-cl->GetNy()); | |
202 | } | |
203 | } | |
204 | if (TMath::Abs(nz-cl->GetNz())>1.) { | |
205 | erry*=TMath::Abs(nz-cl->GetNz()); | |
206 | errz*=TMath::Abs(nz-cl->GetNz()); | |
207 | } | |
208 | erry*=0.85; | |
209 | errz*=0.85; | |
210 | erry= TMath::Min(erry,float(0.0050)); | |
211 | errz= TMath::Min(errz,float(0.0300)); | |
212 | return 10; | |
213 | } | |
214 | ||
215 | //STRIPS | |
216 | if (layer>3){ | |
217 | //factor 1.8 appears in new simulation | |
218 | // | |
219 | Float_t scale=1.8; | |
220 | if (cl->GetNy()==100||cl->GetNz()==100){ | |
221 | erry = 0.004*scale; | |
222 | errz = 0.2*scale; | |
223 | return 100; | |
224 | } | |
225 | if (cl->GetNy()+cl->GetNz()>12){ | |
226 | erry = 0.06*scale; | |
227 | errz = 0.57*scale; | |
228 | return 100; | |
229 | } | |
e50912db | 230 | Float_t normq = cl->GetQ()/(TMath::Sqrt(1+tgl*tgl+tgphitr*tgphitr)); |
572f41f9 | 231 | Float_t chargematch = TMath::Max(double(normq/expQ),2.); |
232 | // | |
233 | if (cl->GetType()==1 || cl->GetType()==10 ){ | |
234 | if (chargematch<1.0 || (cl->GetNy()+cl->GetNz()<nz+ny+0.5)){ | |
235 | errz = 0.043*scale; | |
236 | erry = 0.00094*scale; | |
237 | return 101; | |
238 | } | |
239 | if (cl->GetNy()+cl->GetNz()<nz+ny+1.2){ | |
240 | errz = 0.06*scale; | |
241 | erry =0.0013*scale; | |
242 | return 102; | |
243 | } | |
244 | erry = 0.0027*scale; | |
245 | errz = TMath::Min(0.028*(chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.15)*scale; | |
246 | return 103; | |
247 | } | |
248 | if (cl->GetType()==2 || cl->GetType()==11 ){ | |
249 | erry = TMath::Min(0.0010*(1+chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.05)*scale; | |
250 | errz = TMath::Min(0.025*(1+chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.5)*scale; | |
251 | return 104; | |
252 | } | |
253 | ||
254 | if (cl->GetType()>100 ){ | |
255 | if ((chargematch+cl->GetNy()+cl->GetNz()-nz-ny<1.5)){ | |
256 | errz = 0.05*scale; | |
257 | erry = 0.00096*scale; | |
258 | return 105; | |
259 | } | |
260 | if (cl->GetNy()+cl->GetNz()-nz-ny<1){ | |
261 | errz = 0.10*scale; | |
262 | erry = 0.0025*scale; | |
263 | return 106; | |
264 | } | |
265 | ||
266 | errz = TMath::Min(0.05*(chargematch+cl->GetNy()+cl->GetNz()-nz-ny),0.4)*scale; | |
267 | erry = TMath::Min(0.003*(chargematch+cl->GetNy()+cl->GetNz()-nz-ny),0.05)*scale; | |
268 | return 107; | |
269 | } | |
270 | Float_t diff = cl->GetNy()+cl->GetNz()-ny-nz; | |
271 | if (diff<1) diff=1; | |
272 | if (diff>4) diff=4; | |
273 | ||
274 | if (cl->GetType()==5||cl->GetType()==6||cl->GetType()==7||cl->GetType()==8){ | |
275 | errz = 0.14*diff; | |
276 | erry = 0.003*diff; | |
277 | return 108; | |
278 | } | |
279 | erry = 0.04*diff; | |
280 | errz = 0.06*diff; | |
281 | return 109; | |
282 | } | |
283 | //DRIFTS | |
e50912db | 284 | Float_t normq = cl->GetQ()/(TMath::Sqrt(1+tgl*tgl+tgphitr*tgphitr)); |
572f41f9 | 285 | Float_t chargematch = normq/expQ; |
286 | chargematch/=2.4; // F. Prino Sept. 2007: SDD charge conversion keV->ADC | |
287 | Float_t factorz=1; | |
288 | Int_t cnz = cl->GetNz()%10; | |
289 | //charge match | |
290 | if (cl->GetType()==1){ | |
291 | if (chargematch<1.25){ | |
292 | erry = 0.0028*(1.+6./cl->GetQ()); // gold clusters | |
293 | } | |
294 | else{ | |
295 | erry = 0.003*chargematch; | |
296 | if (cl->GetNz()==3) erry*=1.5; | |
297 | } | |
298 | if (chargematch<1.0){ | |
299 | errz = 0.0011*(1.+6./cl->GetQ()); | |
300 | } | |
301 | else{ | |
302 | errz = 0.002*(1+2*(chargematch-1.)); | |
303 | } | |
304 | if (cnz>nz+0.6) { | |
305 | erry*=(cnz-nz+0.5); | |
306 | errz*=1.4*(cnz-nz+0.5); | |
307 | } | |
308 | } | |
309 | if (cl->GetType()>1){ | |
310 | if (chargematch<1){ | |
311 | erry = 0.00385*(1.+6./cl->GetQ()); // gold clusters | |
312 | errz = 0.0016*(1.+6./cl->GetQ()); | |
313 | } | |
314 | else{ | |
315 | errz = 0.0014*(1+3*(chargematch-1.)); | |
316 | erry = 0.003*(1+3*(chargematch-1.)); | |
317 | } | |
318 | if (cnz>nz+0.6) { | |
319 | erry*=(cnz-nz+0.5); | |
320 | errz*=1.4*(cnz-nz+0.5); | |
321 | } | |
322 | } | |
323 | ||
324 | if (TMath::Abs(cl->GetY())>2.5){ | |
325 | factorz*=1+2*(TMath::Abs(cl->GetY())-2.5); | |
326 | } | |
327 | if (TMath::Abs(cl->GetY())<1){ | |
328 | factorz*=1.+0.5*TMath::Abs(TMath::Abs(cl->GetY())-1.); | |
329 | } | |
330 | factorz= TMath::Min(factorz,float(4.)); | |
331 | errz*=factorz; | |
332 | ||
333 | erry= TMath::Min(erry,float(0.05)); | |
334 | errz= TMath::Min(errz,float(0.05)); | |
335 | return 200; | |
336 | } | |
337 | //-------------------------------------------------------------------------- | |
e50912db | 338 | Int_t AliITSClusterParam::GetErrorParamAngle(Int_t layer, |
339 | const AliITSRecPoint *cl, | |
340 | Float_t tgl,Float_t tgphitr, | |
341 | Float_t &erry,Float_t &errz) | |
342 | { | |
343 | // | |
344 | // Calculate cluster position error (parametrization extracted from rp-hit | |
345 | // residuals, as a function of angle between track and det module plane. | |
346 | // Origin: M.Lunardon, S.Moretto) | |
347 | // | |
b80c197e | 348 | const int kNcfSPDResX = 21; |
349 | const float kCfSPDResX[kNcfSPDResX] = {+1.1201e+01,+2.0903e+00,-2.2909e-01,-2.6413e-01,+4.2135e-01,-3.7190e-01, | |
350 | +4.2339e-01,+1.8679e-01,-5.1249e-01,+1.8421e-01,+4.8849e-02,-4.3127e-01, | |
351 | -1.1148e-01,+3.1984e-03,-2.5743e-01,-6.6408e-02,+3.0756e-01,+2.6809e-01, | |
352 | -5.0339e-03,-1.4964e-01,-1.1001e-01}; | |
12cc92e0 | 353 | const float kSPDazMax=56.000000; |
354 | // | |
b80c197e | 355 | const int kNcfSPDMeanX = 16; |
356 | const float kCfSPDMeanX[kNcfSPDMeanX] = {-1.2532e+00,-3.8185e-01,-8.9039e-01,+2.6648e+00,+7.0361e-01,+1.2298e+00, | |
357 | +3.2871e-01,+7.8487e-02,-1.6792e-01,-1.3966e-01,-3.1670e-01,-2.1795e-01, | |
358 | -1.9451e-01,-4.9347e-02,-1.9186e-01,-1.9195e-01}; | |
12cc92e0 | 359 | // |
b80c197e | 360 | const int kNcfSPDResZ = 5; |
361 | const float kCfSPDResZ[kNcfSPDResZ] = {+9.2384e+01,+3.4352e-01,-2.7317e+01,-1.4642e-01,+2.0868e+00}; | |
12cc92e0 | 362 | const float kSPDpolMin=34.358002, kSPDpolMax=145.000000; |
363 | // | |
b80c197e | 364 | const Double_t kMaxSigmaSDDx=100.; |
365 | const Double_t kMaxSigmaSDDz=400.; | |
366 | const Double_t kMaxSigmaSSDx=100.; | |
367 | const Double_t kMaxSigmaSSDz=1000.; | |
12cc92e0 | 368 | // |
b80c197e | 369 | const Double_t kParamSDDx[2]={30.93,0.059}; |
370 | const Double_t kParamSDDz[2]={33.09,0.011}; | |
371 | const Double_t kParamSSDx[2]={18.64,-0.0046}; | |
372 | const Double_t kParamSSDz[2]={784.4,-0.828}; | |
12cc92e0 | 373 | Double_t sigmax=1000.0,sigmaz=1000.0; |
374 | Double_t biasx = 0.0; | |
375 | ||
376 | Int_t volId = (Int_t)cl->GetVolumeId(); | |
377 | Double_t rotMA[9]; AliGeomManager::GetRotation(volId,rotMA); // misaligned rotation | |
378 | Double_t rotOR[9]; AliGeomManager::GetOrigRotation(volId,rotOR); // original rotation | |
379 | // difference in phi of original and misaligned sensors | |
380 | double cross = rotOR[1]*rotMA[4]-rotOR[4]*rotMA[1]; | |
381 | cross /= TMath::Sqrt( (1.-rotOR[7]*rotOR[7]) * (1.-rotMA[7]*rotMA[7]) ); | |
382 | Double_t angleAzi = TMath::Abs(TMath::ATan(tgphitr) - TMath::ASin(cross) ); | |
383 | Double_t anglePol = TMath::Abs(TMath::ATan(tgl)); | |
384 | ||
385 | if(angleAzi>0.5*TMath::Pi()) angleAzi = TMath::Pi()-angleAzi; | |
386 | if(anglePol>0.5*TMath::Pi()) anglePol = TMath::Pi()-anglePol; | |
387 | Double_t angleAziDeg = angleAzi*180./TMath::Pi(); | |
388 | Double_t anglePolDeg = anglePol*180./TMath::Pi(); | |
389 | ||
390 | if(layer==0 || layer==1) { // SPD | |
391 | // | |
392 | float phiInt = angleAziDeg/kSPDazMax; // mapped to -1:1 | |
393 | if (phiInt>1) phiInt = 1; else if (phiInt<-1) phiInt = -1; | |
394 | float phiAbsInt = (TMath::Abs(angleAziDeg+angleAziDeg) - kSPDazMax)/kSPDazMax; // mapped to -1:1 | |
395 | if (phiAbsInt>1) phiAbsInt = 1; else if (phiAbsInt<-1) phiAbsInt = -1; | |
396 | anglePolDeg += 90; // the parameterization was provided in polar angle (90 deg - normal to sensor) | |
397 | float polInt = (anglePolDeg+anglePolDeg - (kSPDpolMax+kSPDpolMin))/(kSPDpolMax-kSPDpolMin); // mapped to -1:1 | |
398 | if (polInt>1) polInt = 1; else if (polInt<-1) polInt = -1; | |
399 | // | |
400 | sigmax = AliCheb3DCalc::ChebEval1D(phiAbsInt, kCfSPDResX , kNcfSPDResX); | |
401 | biasx = AliCheb3DCalc::ChebEval1D(phiInt , kCfSPDMeanX, kNcfSPDMeanX); | |
402 | sigmaz = AliCheb3DCalc::ChebEval1D(polInt , kCfSPDResZ , kNcfSPDResZ); | |
403 | // | |
404 | // for the moment for the SPD only, need to decide where to put it | |
405 | biasx *= 1e-4; | |
406 | ||
407 | } else if(layer==2 || layer==3) { // SDD | |
408 | ||
b80c197e | 409 | sigmax = angleAziDeg*kParamSDDx[1]+kParamSDDx[0]; |
410 | sigmaz = kParamSDDz[0]+kParamSDDz[1]*anglePolDeg; | |
411 | if(sigmax > kMaxSigmaSDDx) sigmax = kMaxSigmaSDDx; | |
412 | if(sigmaz > kMaxSigmaSDDz) sigmax = kMaxSigmaSDDz; | |
12cc92e0 | 413 | |
414 | } else if(layer==4 || layer==5) { // SSD | |
415 | ||
b80c197e | 416 | sigmax = angleAziDeg*kParamSSDx[1]+kParamSSDx[0]; |
417 | sigmaz = kParamSSDz[0]+kParamSSDz[1]*anglePolDeg; | |
418 | if(sigmax > kMaxSigmaSSDx) sigmax = kMaxSigmaSSDx; | |
419 | if(sigmaz > kMaxSigmaSSDz) sigmax = kMaxSigmaSSDz; | |
12cc92e0 | 420 | |
421 | } | |
422 | ||
423 | // convert from micron to cm | |
424 | erry = 1.e-4*sigmax; | |
425 | errz = 1.e-4*sigmaz; | |
426 | ||
427 | ||
428 | return 1; | |
429 | } | |
430 | //-------------------------------------------------------------------------- | |
431 | Int_t AliITSClusterParam::GetErrorParamAngleOld(Int_t layer, | |
432 | const AliITSRecPoint *cl, | |
433 | Float_t tgl,Float_t tgphitr, | |
434 | Float_t &erry,Float_t &errz) | |
435 | { | |
436 | // | |
437 | // Calculate cluster position error (parametrization extracted from rp-hit | |
438 | // residuals, as a function of angle between track and det module plane. | |
439 | // Origin: M.Lunardon, S.Moretto) | |
440 | // | |
e50912db | 441 | |
442 | Double_t maxSigmaSPDx=100.; | |
443 | Double_t maxSigmaSPDz=400.; | |
444 | Double_t maxSigmaSDDx=100.; | |
445 | Double_t maxSigmaSDDz=400.; | |
446 | Double_t maxSigmaSSDx=100.; | |
447 | Double_t maxSigmaSSDz=1000.; | |
448 | ||
449 | Double_t paramSPDx[3]={-6.417,0.18,11.14}; | |
450 | Double_t paramSPDz[2]={118.,-0.155}; | |
451 | Double_t paramSDDx[2]={30.93,0.059}; | |
452 | Double_t paramSDDz[2]={33.09,0.011}; | |
453 | Double_t paramSSDx[2]={18.64,-0.0046}; | |
454 | Double_t paramSSDz[2]={784.4,-0.828}; | |
455 | Double_t sigmax=1000.0,sigmaz=1000.0; | |
456 | ||
457 | Int_t volId = (Int_t)cl->GetVolumeId(); | |
242bd643 | 458 | Double_t rotMA[9]; AliGeomManager::GetRotation(volId,rotMA); // misaligned rotation |
459 | Double_t rotOR[9]; AliGeomManager::GetOrigRotation(volId,rotOR); // original rotation | |
460 | // difference in phi of original and misaligned sensors | |
461 | double cross = rotOR[1]*rotMA[4]-rotOR[4]*rotMA[1]; | |
462 | cross /= TMath::Sqrt( (1.-rotOR[7]*rotOR[7]) * (1.-rotMA[7]*rotMA[7]) ); | |
463 | Double_t angleAzi = TMath::Abs(TMath::ATan(tgphitr) - TMath::ASin(cross) ); | |
196b395e | 464 | Double_t anglePol = TMath::Abs(TMath::ATan(tgl)); |
242bd643 | 465 | |
196b395e | 466 | if(angleAzi>0.5*TMath::Pi()) angleAzi = TMath::Pi()-angleAzi; |
467 | if(anglePol>0.5*TMath::Pi()) anglePol = TMath::Pi()-anglePol; | |
468 | Double_t angleAziDeg = angleAzi*180./TMath::Pi(); | |
469 | Double_t anglePolDeg = anglePol*180./TMath::Pi(); | |
e50912db | 470 | |
471 | if(layer==0 || layer==1) { // SPD | |
472 | ||
196b395e | 473 | sigmax = TMath::Exp(angleAziDeg*paramSPDx[1]+paramSPDx[0])+paramSPDx[2]; |
474 | sigmaz = paramSPDz[0]+paramSPDz[1]*anglePolDeg; | |
e50912db | 475 | if(sigmax > maxSigmaSPDx) sigmax = maxSigmaSPDx; |
476 | if(sigmaz > maxSigmaSPDz) sigmax = maxSigmaSPDz; | |
477 | ||
478 | } else if(layer==2 || layer==3) { // SDD | |
479 | ||
196b395e | 480 | sigmax = angleAziDeg*paramSDDx[1]+paramSDDx[0]; |
481 | sigmaz = paramSDDz[0]+paramSDDz[1]*anglePolDeg; | |
e50912db | 482 | if(sigmax > maxSigmaSDDx) sigmax = maxSigmaSDDx; |
483 | if(sigmaz > maxSigmaSDDz) sigmax = maxSigmaSDDz; | |
484 | ||
485 | } else if(layer==4 || layer==5) { // SSD | |
486 | ||
196b395e | 487 | sigmax = angleAziDeg*paramSSDx[1]+paramSSDx[0]; |
488 | sigmaz = paramSSDz[0]+paramSSDz[1]*anglePolDeg; | |
e50912db | 489 | if(sigmax > maxSigmaSSDx) sigmax = maxSigmaSSDx; |
490 | if(sigmaz > maxSigmaSSDz) sigmax = maxSigmaSSDz; | |
491 | ||
492 | } | |
493 | ||
494 | // convert from micron to cm | |
495 | erry = 1.e-4*sigmax; | |
496 | errz = 1.e-4*sigmaz; | |
497 | ||
498 | return 1; | |
499 | } | |
500 | //-------------------------------------------------------------------------- | |
572f41f9 | 501 | void AliITSClusterParam::Print(Option_t* /*option*/) const { |
502 | // | |
503 | // Print param Information | |
504 | // | |
505 | ||
506 | // | |
507 | // Error parameterization | |
508 | // | |
509 | printf("NOT YET...\n"); | |
510 | return; | |
511 | } | |
512 | ||
513 | ||
514 | ||
515 | ||
516 |