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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" |
e50912db | 32 | #include "AliGeomManager.h" |
572f41f9 | 33 | #include "AliITSRecPoint.h" |
34 | #include "AliITSClusterParam.h" | |
e50912db | 35 | #include "AliITSReconstructor.h" |
36 | #include "AliExternalTrackParam.h" | |
572f41f9 | 37 | |
38 | ClassImp(AliITSClusterParam) | |
39 | ||
40 | ||
41 | AliITSClusterParam* AliITSClusterParam::fgInstance = 0; | |
42 | ||
43 | ||
44 | /* | |
45 | Example usage fitting parameterization (NOT YET...): | |
46 | TFile fres("resol.root"); //tree with resolution and shape | |
47 | TTree * treeRes =(TTree*)fres.Get("Resol"); | |
48 | ||
49 | AliITSClusterParam param; | |
50 | param.SetInstance(¶m); | |
51 | param.FitResol(treeRes); | |
52 | param.FitRMS(treeRes); | |
53 | TFile fparam("ITSClusterParam.root","recreate"); | |
54 | param.Write("Param"); | |
55 | // | |
56 | // | |
57 | TFile fparam("ITSClusterParam.root"); | |
58 | AliITSClusterParam *param2 = (AliITSClusterParam *) fparam.Get("Param"); | |
59 | param2->SetInstance(param2); | |
60 | param2->Test(treeRes); | |
61 | ||
62 | ||
63 | treeRes->Draw("(Resol-AliITSClusterParam::SGetError0(Dim,Pad,Zm,AngleM))/Resol","Dim==0&&QMean<0") | |
64 | */ | |
65 | ||
66 | //------------------------------------------------------------------------- | |
67 | AliITSClusterParam* AliITSClusterParam::Instance() | |
68 | { | |
69 | // | |
70 | // Singleton implementation | |
71 | // Returns an instance of this class, it is created if neccessary | |
72 | // | |
73 | if (fgInstance == 0){ | |
74 | fgInstance = new AliITSClusterParam(); | |
75 | } | |
76 | return fgInstance; | |
77 | } | |
78 | //------------------------------------------------------------------------- | |
79 | void AliITSClusterParam::GetNTeor(Int_t layer,const AliITSRecPoint* /*cl*/, | |
e50912db | 80 | Float_t tgl,Float_t tgphitr, |
572f41f9 | 81 | Float_t &ny,Float_t &nz) |
82 | { | |
83 | // | |
e50912db | 84 | // Get "mean shape" (original parametrization from AliITStrackerMI) |
572f41f9 | 85 | // |
e50912db | 86 | tgl = TMath::Abs(tgl); |
87 | tgphitr = TMath::Abs(tgphitr); | |
88 | ||
89 | // SPD | |
90 | if (layer==0) { | |
91 | ny = 1.+tgphitr*3.2; | |
92 | nz = 1.+tgl*0.34; | |
572f41f9 | 93 | return; |
94 | } | |
e50912db | 95 | if (layer==1) { |
96 | ny = 1.+tgphitr*3.2; | |
97 | nz = 1.+tgl*0.28; | |
572f41f9 | 98 | return; |
99 | } | |
e50912db | 100 | // SSD |
101 | if (layer==4 || layer==5) { | |
102 | ny = 2.02+tgphitr*1.95; | |
103 | nz = 2.02+tgphitr*2.35; | |
572f41f9 | 104 | return; |
105 | } | |
e50912db | 106 | // SDD |
107 | ny = 6.6-2.7*tgphitr; | |
108 | nz = 2.8-3.11*tgphitr+0.45*tgl; | |
109 | return; | |
110 | } | |
111 | //-------------------------------------------------------------------------- | |
112 | Int_t AliITSClusterParam::GetError(Int_t layer, | |
113 | const AliITSRecPoint *cl, | |
114 | Float_t tgl,Float_t tgphitr,Float_t expQ, | |
8c139cf3 | 115 | Float_t &erry,Float_t &errz, |
116 | Bool_t addMisalErr) | |
e50912db | 117 | { |
118 | // | |
119 | // Calculate cluster position error | |
120 | // | |
401eff16 | 121 | Int_t retval=0; |
e50912db | 122 | switch(AliITSReconstructor::GetRecoParam()->GetClusterErrorsParam()) { |
123 | case 0: | |
401eff16 | 124 | retval = GetErrorOrigRecPoint(cl,erry,errz); |
e50912db | 125 | break; |
126 | case 1: | |
401eff16 | 127 | retval = GetErrorParamMI(layer,cl,tgl,tgphitr,expQ,erry,errz); |
e50912db | 128 | break; |
129 | case 2: | |
401eff16 | 130 | retval = GetErrorParamAngle(layer,cl,tgl,tgphitr,erry,errz); |
e50912db | 131 | break; |
132 | default: | |
401eff16 | 133 | retval = GetErrorParamMI(layer,cl,tgl,tgphitr,expQ,erry,errz); |
e50912db | 134 | break; |
135 | } | |
136 | ||
8c139cf3 | 137 | if(addMisalErr) { |
138 | // add error due to misalignment (to be improved) | |
f9119eb9 | 139 | Float_t errmisalY2 = AliITSReconstructor::GetRecoParam()->GetClusterMisalErrorY(layer) |
140 | *AliITSReconstructor::GetRecoParam()->GetClusterMisalErrorY(layer); | |
141 | Float_t errmisalZ2 = AliITSReconstructor::GetRecoParam()->GetClusterMisalErrorZ(layer) | |
142 | *AliITSReconstructor::GetRecoParam()->GetClusterMisalErrorZ(layer); | |
143 | erry = TMath::Sqrt(erry*erry+errmisalY2); | |
144 | errz = TMath::Sqrt(errz*errz+errmisalZ2); | |
8c139cf3 | 145 | } |
401eff16 | 146 | |
147 | return retval; | |
148 | ||
572f41f9 | 149 | } |
150 | //-------------------------------------------------------------------------- | |
e50912db | 151 | Int_t AliITSClusterParam::GetErrorOrigRecPoint(const AliITSRecPoint*cl, |
572f41f9 | 152 | Float_t &erry,Float_t &errz) |
153 | { | |
e50912db | 154 | // |
155 | // Calculate cluster position error (just take error from AliITSRecPoint) | |
156 | // | |
157 | erry = TMath::Sqrt(cl->GetSigmaY2()); | |
158 | errz = TMath::Sqrt(cl->GetSigmaZ2()); | |
159 | ||
160 | return 1; | |
161 | } | |
162 | //-------------------------------------------------------------------------- | |
163 | Int_t AliITSClusterParam::GetErrorParamMI(Int_t layer,const AliITSRecPoint*cl, | |
164 | Float_t tgl,Float_t tgphitr, | |
165 | Float_t expQ, | |
166 | Float_t &erry,Float_t &errz) | |
167 | { | |
168 | // | |
169 | // Calculate cluster position error (original parametrization from | |
170 | // AliITStrackerMI) | |
572f41f9 | 171 | // |
172 | Float_t nz,ny; | |
e50912db | 173 | GetNTeor(layer, cl,tgl,tgphitr,ny,nz); |
572f41f9 | 174 | erry = TMath::Sqrt(cl->GetSigmaY2()); |
175 | errz = TMath::Sqrt(cl->GetSigmaZ2()); | |
176 | // | |
177 | // PIXELS | |
178 | if (layer<2){ | |
179 | if (TMath::Abs(ny-cl->GetNy())>0.6) { | |
180 | if (ny<cl->GetNy()){ | |
181 | erry*=0.4+TMath::Abs(ny-cl->GetNy()); | |
182 | errz*=0.4+TMath::Abs(ny-cl->GetNy()); | |
183 | }else{ | |
184 | erry*=0.7+0.5*TMath::Abs(ny-cl->GetNy()); | |
185 | errz*=0.7+0.5*TMath::Abs(ny-cl->GetNy()); | |
186 | } | |
187 | } | |
188 | if (TMath::Abs(nz-cl->GetNz())>1.) { | |
189 | erry*=TMath::Abs(nz-cl->GetNz()); | |
190 | errz*=TMath::Abs(nz-cl->GetNz()); | |
191 | } | |
192 | erry*=0.85; | |
193 | errz*=0.85; | |
194 | erry= TMath::Min(erry,float(0.0050)); | |
195 | errz= TMath::Min(errz,float(0.0300)); | |
196 | return 10; | |
197 | } | |
198 | ||
199 | //STRIPS | |
200 | if (layer>3){ | |
201 | //factor 1.8 appears in new simulation | |
202 | // | |
203 | Float_t scale=1.8; | |
204 | if (cl->GetNy()==100||cl->GetNz()==100){ | |
205 | erry = 0.004*scale; | |
206 | errz = 0.2*scale; | |
207 | return 100; | |
208 | } | |
209 | if (cl->GetNy()+cl->GetNz()>12){ | |
210 | erry = 0.06*scale; | |
211 | errz = 0.57*scale; | |
212 | return 100; | |
213 | } | |
e50912db | 214 | Float_t normq = cl->GetQ()/(TMath::Sqrt(1+tgl*tgl+tgphitr*tgphitr)); |
572f41f9 | 215 | Float_t chargematch = TMath::Max(double(normq/expQ),2.); |
216 | // | |
217 | if (cl->GetType()==1 || cl->GetType()==10 ){ | |
218 | if (chargematch<1.0 || (cl->GetNy()+cl->GetNz()<nz+ny+0.5)){ | |
219 | errz = 0.043*scale; | |
220 | erry = 0.00094*scale; | |
221 | return 101; | |
222 | } | |
223 | if (cl->GetNy()+cl->GetNz()<nz+ny+1.2){ | |
224 | errz = 0.06*scale; | |
225 | erry =0.0013*scale; | |
226 | return 102; | |
227 | } | |
228 | erry = 0.0027*scale; | |
229 | errz = TMath::Min(0.028*(chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.15)*scale; | |
230 | return 103; | |
231 | } | |
232 | if (cl->GetType()==2 || cl->GetType()==11 ){ | |
233 | erry = TMath::Min(0.0010*(1+chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.05)*scale; | |
234 | errz = TMath::Min(0.025*(1+chargematch+cl->GetNy()+cl->GetNz()-nz+ny),0.5)*scale; | |
235 | return 104; | |
236 | } | |
237 | ||
238 | if (cl->GetType()>100 ){ | |
239 | if ((chargematch+cl->GetNy()+cl->GetNz()-nz-ny<1.5)){ | |
240 | errz = 0.05*scale; | |
241 | erry = 0.00096*scale; | |
242 | return 105; | |
243 | } | |
244 | if (cl->GetNy()+cl->GetNz()-nz-ny<1){ | |
245 | errz = 0.10*scale; | |
246 | erry = 0.0025*scale; | |
247 | return 106; | |
248 | } | |
249 | ||
250 | errz = TMath::Min(0.05*(chargematch+cl->GetNy()+cl->GetNz()-nz-ny),0.4)*scale; | |
251 | erry = TMath::Min(0.003*(chargematch+cl->GetNy()+cl->GetNz()-nz-ny),0.05)*scale; | |
252 | return 107; | |
253 | } | |
254 | Float_t diff = cl->GetNy()+cl->GetNz()-ny-nz; | |
255 | if (diff<1) diff=1; | |
256 | if (diff>4) diff=4; | |
257 | ||
258 | if (cl->GetType()==5||cl->GetType()==6||cl->GetType()==7||cl->GetType()==8){ | |
259 | errz = 0.14*diff; | |
260 | erry = 0.003*diff; | |
261 | return 108; | |
262 | } | |
263 | erry = 0.04*diff; | |
264 | errz = 0.06*diff; | |
265 | return 109; | |
266 | } | |
267 | //DRIFTS | |
e50912db | 268 | Float_t normq = cl->GetQ()/(TMath::Sqrt(1+tgl*tgl+tgphitr*tgphitr)); |
572f41f9 | 269 | Float_t chargematch = normq/expQ; |
270 | chargematch/=2.4; // F. Prino Sept. 2007: SDD charge conversion keV->ADC | |
271 | Float_t factorz=1; | |
272 | Int_t cnz = cl->GetNz()%10; | |
273 | //charge match | |
274 | if (cl->GetType()==1){ | |
275 | if (chargematch<1.25){ | |
276 | erry = 0.0028*(1.+6./cl->GetQ()); // gold clusters | |
277 | } | |
278 | else{ | |
279 | erry = 0.003*chargematch; | |
280 | if (cl->GetNz()==3) erry*=1.5; | |
281 | } | |
282 | if (chargematch<1.0){ | |
283 | errz = 0.0011*(1.+6./cl->GetQ()); | |
284 | } | |
285 | else{ | |
286 | errz = 0.002*(1+2*(chargematch-1.)); | |
287 | } | |
288 | if (cnz>nz+0.6) { | |
289 | erry*=(cnz-nz+0.5); | |
290 | errz*=1.4*(cnz-nz+0.5); | |
291 | } | |
292 | } | |
293 | if (cl->GetType()>1){ | |
294 | if (chargematch<1){ | |
295 | erry = 0.00385*(1.+6./cl->GetQ()); // gold clusters | |
296 | errz = 0.0016*(1.+6./cl->GetQ()); | |
297 | } | |
298 | else{ | |
299 | errz = 0.0014*(1+3*(chargematch-1.)); | |
300 | erry = 0.003*(1+3*(chargematch-1.)); | |
301 | } | |
302 | if (cnz>nz+0.6) { | |
303 | erry*=(cnz-nz+0.5); | |
304 | errz*=1.4*(cnz-nz+0.5); | |
305 | } | |
306 | } | |
307 | ||
308 | if (TMath::Abs(cl->GetY())>2.5){ | |
309 | factorz*=1+2*(TMath::Abs(cl->GetY())-2.5); | |
310 | } | |
311 | if (TMath::Abs(cl->GetY())<1){ | |
312 | factorz*=1.+0.5*TMath::Abs(TMath::Abs(cl->GetY())-1.); | |
313 | } | |
314 | factorz= TMath::Min(factorz,float(4.)); | |
315 | errz*=factorz; | |
316 | ||
317 | erry= TMath::Min(erry,float(0.05)); | |
318 | errz= TMath::Min(errz,float(0.05)); | |
319 | return 200; | |
320 | } | |
321 | //-------------------------------------------------------------------------- | |
e50912db | 322 | Int_t AliITSClusterParam::GetErrorParamAngle(Int_t layer, |
323 | const AliITSRecPoint *cl, | |
324 | Float_t tgl,Float_t tgphitr, | |
325 | Float_t &erry,Float_t &errz) | |
326 | { | |
327 | // | |
328 | // Calculate cluster position error (parametrization extracted from rp-hit | |
329 | // residuals, as a function of angle between track and det module plane. | |
330 | // Origin: M.Lunardon, S.Moretto) | |
331 | // | |
332 | ||
333 | Double_t maxSigmaSPDx=100.; | |
334 | Double_t maxSigmaSPDz=400.; | |
335 | Double_t maxSigmaSDDx=100.; | |
336 | Double_t maxSigmaSDDz=400.; | |
337 | Double_t maxSigmaSSDx=100.; | |
338 | Double_t maxSigmaSSDz=1000.; | |
339 | ||
340 | Double_t paramSPDx[3]={-6.417,0.18,11.14}; | |
341 | Double_t paramSPDz[2]={118.,-0.155}; | |
342 | Double_t paramSDDx[2]={30.93,0.059}; | |
343 | Double_t paramSDDz[2]={33.09,0.011}; | |
344 | Double_t paramSSDx[2]={18.64,-0.0046}; | |
345 | Double_t paramSSDz[2]={784.4,-0.828}; | |
346 | Double_t sigmax=1000.0,sigmaz=1000.0; | |
347 | ||
348 | Int_t volId = (Int_t)cl->GetVolumeId(); | |
349 | Double_t tra[3]; AliGeomManager::GetOrigTranslation(volId,tra); | |
350 | Double_t rot[9]; AliGeomManager::GetOrigRotation(volId,rot); | |
351 | ||
352 | ||
353 | Double_t phitr = TMath::ATan(tgphitr); | |
354 | Double_t alpha = TMath::ATan2(tra[1],tra[0]); | |
355 | Double_t phiglob = alpha+phitr; | |
356 | Double_t p[3]; | |
357 | p[0] = TMath::Cos(phiglob); | |
358 | p[1] = TMath::Sin(phiglob); | |
359 | p[2] = tgl; | |
360 | TVector3 pvec(p[0],p[1],p[2]); | |
c3a24b56 | 361 | TVector3 normvec(rot[1],rot[4],rot[7]); |
e50912db | 362 | Double_t angle = pvec.Angle(normvec); |
363 | if(angle>0.5*TMath::Pi()) angle = TMath::Pi()-angle; | |
0ffe9832 | 364 | Double_t angleDeg = angle*180./TMath::Pi(); |
e50912db | 365 | |
366 | if(layer==0 || layer==1) { // SPD | |
367 | ||
368 | sigmax = TMath::Exp(angleDeg*paramSPDx[1]+paramSPDx[0])+paramSPDx[2]; | |
369 | sigmaz = paramSPDz[0]+paramSPDz[1]*angleDeg; | |
370 | if(sigmax > maxSigmaSPDx) sigmax = maxSigmaSPDx; | |
371 | if(sigmaz > maxSigmaSPDz) sigmax = maxSigmaSPDz; | |
372 | ||
373 | } else if(layer==2 || layer==3) { // SDD | |
374 | ||
375 | sigmax = angleDeg*paramSDDx[1]+paramSDDx[0]; | |
376 | sigmaz = paramSDDz[0]+paramSDDz[1]*angleDeg; | |
377 | if(sigmax > maxSigmaSDDx) sigmax = maxSigmaSDDx; | |
378 | if(sigmaz > maxSigmaSDDz) sigmax = maxSigmaSDDz; | |
379 | ||
380 | } else if(layer==4 || layer==5) { // SSD | |
381 | ||
382 | sigmax = angleDeg*paramSSDx[1]+paramSSDx[0]; | |
383 | sigmaz = paramSSDz[0]+paramSSDz[1]*angleDeg; | |
384 | if(sigmax > maxSigmaSSDx) sigmax = maxSigmaSSDx; | |
385 | if(sigmaz > maxSigmaSSDz) sigmax = maxSigmaSSDz; | |
386 | ||
387 | } | |
388 | ||
389 | // convert from micron to cm | |
390 | erry = 1.e-4*sigmax; | |
391 | errz = 1.e-4*sigmaz; | |
392 | ||
393 | return 1; | |
394 | } | |
395 | //-------------------------------------------------------------------------- | |
572f41f9 | 396 | void AliITSClusterParam::Print(Option_t* /*option*/) const { |
397 | // | |
398 | // Print param Information | |
399 | // | |
400 | ||
401 | // | |
402 | // Error parameterization | |
403 | // | |
404 | printf("NOT YET...\n"); | |
405 | return; | |
406 | } | |
407 | ||
408 | ||
409 | ||
410 | ||
411 |