1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
17 ///////////////////////////////////////////////////////////////////////////////
19 // Class to make a internal alignemnt of TPC chambers //
21 // Different linear tranformation investigated
22 // 12 parameters - arbitrary linear transformation
23 // 9 parameters - scaling fixed to 1
24 // 6 parameters - x-y rotation x-z, y-z tiliting
26 //// Only the 12 parameter version works so far...
31 #include "TLinearFitter.h"
32 #include "AliTPCcalibAlign.h"
33 #include "AliExternalTrackParam.h"
34 #include "AliTPCTracklet.h"
37 #include "TTreeStream.h"
45 ClassImp(AliTPCcalibAlign)
47 AliTPCcalibAlign::AliTPCcalibAlign()
48 : fDphiHistArray(72*72),
49 fDthetaHistArray(72*72),
52 fFitterArray12(72*72),
59 for (Int_t i=0;i<72*72;++i) {
64 AliTPCcalibAlign::AliTPCcalibAlign(const Text_t *name, const Text_t *title)
66 fDphiHistArray(72*72),
67 fDthetaHistArray(72*72),
70 fFitterArray12(72*72),
79 for (Int_t i=0;i<72*72;++i) {
84 AliTPCcalibAlign::~AliTPCcalibAlign() {
90 void AliTPCcalibAlign::Process(AliTPCseed *seed) {
92 AliTPCTracklet::CreateTracklets(seed,AliTPCTracklet::kKalman,
94 // TObjArray trackletsL=
95 // AliTPCTracklet::CreateTracklets(seed,AliTPCTracklet::kLinear,
97 // TObjArray trackletsQ=
98 // AliTPCTracklet::CreateTracklets(seed,AliTPCTracklet::kQuadratic,
100 // TObjArray trackletsR=
101 // AliTPCTracklet::CreateTracklets(seed,AliTPCTracklet::kRiemann,
103 tracklets.SetOwner();
104 // trackletsL.SetOwner();
105 // trackletsQ.SetOwner();
106 // trackletsR.SetOwner();
107 if (tracklets.GetEntries()==2) {
108 AliTPCTracklet *t1=static_cast<AliTPCTracklet*>(tracklets[0]);
109 AliTPCTracklet *t2=static_cast<AliTPCTracklet*>(tracklets[1]);
110 if (t1->GetSector()>t2->GetSector()) {
111 AliTPCTracklet* tmp=t1;
115 AliExternalTrackParam *common1=0,*common2=0;
116 if (AliTPCTracklet::PropagateToMeanX(*t1,*t2,common1,common2))
117 ProcessTracklets(*common1,*common2,t1->GetSector(),t2->GetSector());
124 void AliTPCcalibAlign::Analyze(){
132 void AliTPCcalibAlign::Terminate(){
134 // Terminate function
135 // call base terminate + Eval of fitters
137 if (GetDebugLevel()>0) Info("AliTPCcalibAlign","Teminate");
139 AliTPCcalibBase::Terminate();
145 void AliTPCcalibAlign::ProcessTracklets(const AliExternalTrackParam &tp1,
146 const AliExternalTrackParam &tp2,
152 FillHisto(tp1,tp2,s1,s2);
154 // Process function to fill fitters
156 Double_t t1[5],t2[5];
157 Double_t &x1=t1[0], &y1=t1[1], &z1=t1[2], &dydx1=t1[3], &dzdx1=t1[4];
158 Double_t &x2=t2[0], &y2=t2[1], &z2=t2[2], &dydx2=t2[3], &dzdx2=t2[4];
162 Double_t snp1=tp1.GetSnp();
163 dydx1=snp1/TMath::Sqrt(1.-snp1*snp1);
164 Double_t tgl1=tp1.GetTgl();
165 // dz/dx = 1/(cos(theta)*cos(phi))
166 dzdx1=tgl1/TMath::Sqrt(1.-snp1*snp1);
170 Double_t snp2=tp2.GetSnp();
171 dydx2=snp2/TMath::Sqrt(1.-snp2*snp2);
172 Double_t tgl2=tp2.GetTgl();
173 dzdx2=tgl2/TMath::Sqrt(1.-snp2*snp2);
178 TTreeSRedirector *cstream = GetDebugStreamer();
180 static TVectorD vec1(5);
181 static TVectorD vec2(5);
182 vec1.SetElements(t1);
183 vec2.SetElements(t2);
184 AliExternalTrackParam *p1 = &((AliExternalTrackParam&)tp1);
185 AliExternalTrackParam *p2 = &((AliExternalTrackParam&)tp2);
186 (*cstream)<<"Tracklet"<<
196 Process12(t1,t2,GetOrMakeFitter12(s1,s2));
197 Process9(t1,t2,GetOrMakeFitter9(s1,s2));
198 Process6(t1,t2,GetOrMakeFitter6(s1,s2));
199 ++fPoints[GetIndex(s1,s2)];
202 void AliTPCcalibAlign::Process12(const Double_t *t1,
204 TLinearFitter *fitter) {
205 // x2 = a00*x1 + a01*y1 + a02*z1 + a03
206 // y2 = a10*x1 + a11*y1 + a12*z1 + a13
207 // z2 = a20*x1 + a21*y1 + a22*z1 + a23
208 // dydx2 = (a10 + a11*dydx1 + a12*dzdx1)/(a00 + a01*dydx1 + a02*dzdx1)
209 // dzdx2 = (a20 + a21*dydx1 + a22*dzdx1)/(a00 + a01*dydx1 + a02*dzdx1)
211 // a00 a01 a02 a03 p[0] p[1] p[2] p[9]
212 // a10 a11 a12 a13 ==> p[3] p[4] p[5] p[10]
213 // a20 a21 a22 a23 p[6] p[7] p[8] p[11]
214 const Double_t &x1=t1[0], &y1=t1[1], &z1=t1[2], &dydx1=t1[3], &dzdx1=t1[4];
215 const Double_t /*&x2=t2[0],*/ &y2=t2[1], &z2=t2[2], &dydx2=t2[3], &dzdx2=t2[4];
220 Double_t sdydx = 0.001;
221 Double_t sdzdx = 0.001;
226 // x2 = a00*x1 + a01*y1 + a02*z1 + a03
227 // y2 = a10*x1 + a11*y1 + a12*z1 + a13
228 // y2' = a10*x1 + a11*y1 + a12*z1 + a13 + (a01*y1 + a02*z1 + a03)*dydx2
229 for (Int_t i=0; i<12;i++) p[i]=0.;
234 p[0+1] = y1*dydx2; // a01
235 p[0+2] = z1*dydx2; // a02
236 p[9+0] = dydx2; // a03
238 fitter->AddPoint(p,value,sy);
240 // x2 = a00*x1 + a01*y1 + a02*z1 + a03
241 // z2 = a20*x1 + a21*y1 + a22*z1 + a23
242 // z2' = a20*x1 + a21*y1 + a22*z1 + a23 + (a01*y1 + a02*z1 + a03)*dzdx2;
243 for (Int_t i=0; i<12;i++) p[i]=0.;
248 p[0+1] = y1*dzdx2; // a01
249 p[0+2] = z1*dzdx2; // a02
250 p[9+0] = dzdx2; // a03
252 fitter->AddPoint(p,value,sz);
254 // dydx2 = (a10 + a11*dydx1 + a12*dzdx1)/( a00 + a01*dydx1 + a02*dzdx1)
255 // (a10 + a11*dydx1 + a12*dzdx1) - (a00 + a01*dydx1 + a02*dzdx1)*dydx2 = 0
256 for (Int_t i=0; i<12;i++) p[i]=0.;
258 p[3+1] = dydx1; // a11
259 p[3+2] = dzdx1; // a12
260 p[0+0] = -dydx2; // a00
261 p[0+1] = -dydx1*dydx2; // a01
262 p[0+2] = -dzdx1*dydx2; // a02
264 fitter->AddPoint(p,value,sdydx);
266 // dzdx2 = (a20 + a21*dydx1 + a22*dzdx1)/( a00 + a01*dydx1 + a02*dzdx1)
267 // (a20 + a21*dydx1 + a22*dzdx1) - (a00 + a01*dydx1 + a02*dzdx1)*dzdx2 = 0
268 for (Int_t i=0; i<12;i++) p[i]=0.;
270 p[6+1] = dydx1; // a21
271 p[6+2] = dzdx1; // a22
272 p[0+0] = -dzdx2; // a00
273 p[0+1] = -dydx1*dzdx2; // a01
274 p[0+2] = -dzdx1*dzdx2; // a02
276 fitter->AddPoint(p,value,sdzdx);
279 void AliTPCcalibAlign::Process9(Double_t *t1,
281 TLinearFitter *fitter) {
282 // x2 = a00*x1 + a01*y1 + a02*z1 + a03
283 // y2 = a10*x1 + a11*y1 + a12*z1 + a13
284 // z2 = a20*x1 + a21*y1 + a22*z1 + a23
285 // dydx2 = (a10 + a11*dydx1 + a12*dzdx1)/(a00 + a01*dydx1 + a02*dzdx1)
286 // dzdx2 = (a20 + a21*dydx1 + a22*dzdx1)/(a00 + a01*dydx1 + a02*dzdx1)
288 // a00 a01 a02 a03 p[0] p[1] p[2] p[9]
289 // a10 a11 a12 a13 ==> p[3] p[4] p[5] p[10]
290 // a20 a21 a22 a23 p[6] p[7] p[8] p[11]
291 Double_t &x1=t1[0], &y1=t1[1], &z1=t1[2], &dydx1=t1[3], &dzdx1=t1[4];
292 Double_t /*&x2=t2[0],*/ &y2=t2[1], &z2=t2[2], &dydx2=t2[3], &dzdx2=t2[4];
303 // x2 = a00*x1 + a01*y1 + a02*z1 + a03
304 // y2 = a10*x1 + a11*y1 + a12*z1 + a13
305 // y2' = a10*x1 + a11*y1 + a12*z1 + a13 + (a01*y1 + a03)*dydx2
306 for (Int_t i=0; i<12;i++) p[i]=0.;
315 fitter->AddPoint(p,value,sy);
317 // x2 = a00*x1 + a01*y1 + a02*z1 + a03
318 // z2 = a20*x1 + a21*y1 + a22*z1 + a23
319 // z2' = a20*x1 + a21*y1 + a22*z1 + a23 + (a01*y1 + a03)*dzdx2;
320 for (Int_t i=0; i<12;i++) p[i]=0.;
329 fitter->AddPoint(p,value,sz);
331 // dydx2 = (a10 + a11*dydx1 + a12*dzdx1)/( a00 + a01*dydx1 + a02*dzdx1)
332 // (a10 + a11*dydx1 + a12*dzdx1) - (a00 + a01*dydx1 + a02*dzdx1)*dydx2 = 0
333 for (Int_t i=0; i<12;i++) p[i]=0.;
338 p[0+1] = -dydx1*dydx2;
339 p[0+2] = -dzdx1*dydx2;
341 fitter->AddPoint(p,value,sdydx);
343 // dzdx2 = (a20 + a21*dydx1 + a22*dzdx1)/( a00 + a01*dydx1 + a02*dzdx1)
344 // (a20 + a21*dydx1 + a22*dzdx1) - (a00 + a01*dydx1 + a02*dzdx1)*dzdx2 = 0
345 for (Int_t i=0; i<12;i++) p[i]=0.;
350 p[0+1] = -dydx1*dzdx2;
351 p[0+2] = -dzdx1*dzdx2;
353 fitter->AddPoint(p,value,sdzdx);
356 void AliTPCcalibAlign::Process6(Double_t *t1,
358 TLinearFitter *fitter) {
359 // x2 = 1 *x1 +-a01*y1 + 0 +a03
360 // y2 = a01*x1 + 1 *y1 + 0 +a13
361 // z2 = a20*x1 + a21*y1 + 1 *z1 +a23
362 // dydx2 = (a10 + a11*dydx1 + a12*dzdx1)/(a00 + a01*dydx1 + a02*dzdx1)
363 // dzdx2 = (a20 + a21*dydx1 + a22*dzdx1)/(a00 + a01*dydx1 + a02*dzdx1)
365 // 1 -a01 0 a03 x -p[0] x p[3]
366 // a10 1 0 a13 ==> p[0] x x p[4]
367 // a20 a21 1 a23 p[1] p[2] x p[5]
368 Double_t &x1=t1[0], &y1=t1[1], &z1=t1[2], &dydx1=t1[3], &dzdx1=t1[4];
369 Double_t /*&x2=t2[0],*/ &y2=t2[1], &z2=t2[2], &dydx2=t2[3], &dzdx2=t2[4];
374 Double_t sdydx = 0.001;
375 Double_t sdzdx = 0.001;
380 // x2 = 1 *x1 +-a01*y1 + 0 +a03
381 // y2 = a01*x1 + 1 *y1 + 0 +a13
382 // y2' = a10*x1 + a11*y1 + a12*z1 + a13 + (a01*y1 + a02*z1 + a03)*dydx2
383 for (Int_t i=0; i<12;i++) p[i]=0.;
392 fitter->AddPoint(p,value,sy);
394 // x2 = 1 *x1 +-a01*y1 + 0 + a03
395 // z2 = a20*x1 + a21*y1 + 1 *z1 + a23
396 // z2' = a20*x1 + a21*y1 + a22*z1 + a23 + (a01*y1 + a02*z1 +a03)*dzdx2;
397 for (Int_t i=0; i<12;i++) p[i]=0.;
406 fitter->AddPoint(p,value,sz);
408 // dydx2 = (a10 + a11*dydx1 + a12*dzdx1)/( a00 + a01*dydx1 + a02*dzdx1)
409 // (a10 + a11*dydx1 + a12*dzdx1) - (a00 + a01*dydx1 + a02*dzdx1)*dydx2 = 0
410 for (Int_t i=0; i<12;i++) p[i]=0.;
415 p[0+1] = -dydx1*dydx2;
416 p[0+2] = -dzdx1*dydx2;
418 fitter->AddPoint(p,value,sdydx);
420 // dzdx2 = (a20 + a21*dydx1 + a22*dzdx1)/( a00 + a01*dydx1 + a02*dzdx1)
421 // (a20 + a21*dydx1 + a22*dzdx1) - (a00 + a01*dydx1 + a02*dzdx1)*dzdx2 = 0
422 for (Int_t i=0; i<12;i++) p[i]=0.;
427 p[0+1] = -dydx1*dzdx2;
428 p[0+2] = -dzdx1*dzdx2;
430 fitter->AddPoint(p,value,sdzdx);
436 void AliTPCcalibAlign::EvalFitters() {
440 // Perform the fitting using linear fitters
442 Int_t kMinPoints =50;
444 TFile fff("alignDebug.root","recreate");
445 for (Int_t s1=0;s1<72;++s1)
446 for (Int_t s2=0;s2<72;++s2){
447 if ((f=GetFitter12(s1,s2))&&fPoints[GetIndex(s1,s2)]>kMinPoints) {
448 // cerr<<s1<<","<<s2<<": "<<fPoints[GetIndex(s1,s2)]<<endl;
450 cerr<<"Evaluation failed for "<<s1<<","<<s2<<endl;
451 f->Write(Form("f12_%d_%d",s1,s2));
453 f->Write(Form("f12_%d_%d",s1,s2));
456 if ((f=GetFitter9(s1,s2))&&fPoints[GetIndex(s1,s2)]>kMinPoints) {
457 // cerr<<s1<<","<<s2<<": "<<fPoints[GetIndex(s1,s2)]<<endl;
459 cerr<<"Evaluation failed for "<<s1<<","<<s2<<endl;
461 f->Write(Form("f9_%d_%d",s1,s2));
464 if ((f=GetFitter6(s1,s2))&&fPoints[GetIndex(s1,s2)]>kMinPoints) {
465 // cerr<<s1<<","<<s2<<": "<<fPoints[GetIndex(s1,s2)]<<endl;
467 cerr<<"Evaluation failed for "<<s1<<","<<s2<<endl;
469 f->Write(Form("f6_%d_%d",s1,s2));
473 this->Write("align");
478 chi212 = align->GetChisquare()/(4.*entries);
482 align->GetParameters(par);
483 align->GetCovarianceMatrix(mat);
487 for (Int_t i=0; i<12;i++){
488 palign12(i)= par(i+1);
489 for (Int_t j=0; j<12;j++){
490 pcovar12(i,j) = mat(i+1,j+1);
491 pcovar12(i,j) *= chi212;
495 for (Int_t i=0; i<12;i++){
496 psigma12(i) = TMath::Sqrt(pcovar12(i,i));
497 palignR12(i) = palign12(i)/TMath::Sqrt(pcovar12(i,i));
498 for (Int_t j=0; j<12;j++){
499 pcovarN12(i,j) = pcovar12(i,j)/TMath::Sqrt(pcovar12(i,i)*pcovar12(j,j));
505 TLinearFitter* AliTPCcalibAlign::GetOrMakeFitter12(Int_t s1,Int_t s2) {
507 // get or make fitter - general linear transformation
509 static Int_t counter12=0;
510 static TF1 f12("f12","x[0]++x[1]++x[2]++x[3]++x[4]++x[5]++x[6]++x[7]++x[8]++x[9]++x[10]++x[11]");
511 TLinearFitter * fitter = GetFitter12(s1,s2);
512 if (fitter) return fitter;
513 // fitter =new TLinearFitter(12,"x[0]++x[1]++x[2]++x[3]++x[4]++x[5]++x[6]++x[7]++x[8]++x[9]++x[10]++x[11]");
514 fitter =new TLinearFitter(&f12,"");
515 fitter->StoreData(kFALSE);
516 fFitterArray12.AddAt(fitter,GetIndex(s1,s2));
518 if (GetDebugLevel()>0) cerr<<"Creating fitter12 "<<s1<<","<<s2<<" : "<<counter12<<endl;
522 TLinearFitter* AliTPCcalibAlign::GetOrMakeFitter9(Int_t s1,Int_t s2) {
524 //get or make fitter - general linear transformation - no scaling
526 static Int_t counter9=0;
527 static TF1 f9("f9","x[0]++x[1]++x[2]++x[3]++x[4]++x[5]++x[6]++x[7]++x[8]");
528 TLinearFitter * fitter = GetFitter9(s1,s2);
529 if (fitter) return fitter;
530 // fitter =new TLinearFitter(9,"x[0]++x[1]++x[2]++x[3]++x[4]++x[5]++x[6]++x[7]++x[8]");
531 fitter =new TLinearFitter(&f9,"");
532 fitter->StoreData(kFALSE);
533 fFitterArray9.AddAt(fitter,GetIndex(s1,s2));
535 if (GetDebugLevel()>0) cerr<<"Creating fitter12 "<<s1<<","<<s2<<" : "<<counter9<<endl;
539 TLinearFitter* AliTPCcalibAlign::GetOrMakeFitter6(Int_t s1,Int_t s2) {
541 // get or make fitter - 6 paramater linear tranformation
544 // - tilting x-z, y-z
545 static Int_t counter6=0;
546 static TF1 f6("f6","x[0]++x[1]++x[2]++x[3]++x[4]++x[5]");
547 TLinearFitter * fitter = GetFitter6(s1,s2);
548 if (fitter) return fitter;
549 // fitter=new TLinearFitter(6,"x[0]++x[1]++x[2]++x[3]++x[4]++x[5]");
550 fitter=new TLinearFitter(&f6,"");
551 fitter->StoreData(kFALSE);
552 fFitterArray6.AddAt(fitter,GetIndex(s1,s2));
554 if (GetDebugLevel()>0) cerr<<"Creating fitter6 "<<s1<<","<<s2<<" : "<<counter6<<endl;
562 Bool_t AliTPCcalibAlign::GetTransformation12(Int_t s1,Int_t s2,TMatrixD &a) {
564 // GetTransformation matrix - 12 paramaters - generael linear transformation
566 if (!GetFitter12(s1,s2))
570 GetFitter12(s1,s2)->GetParameters(p);
572 a[0][0]=p[0]; a[0][1]=p[1]; a[0][2]=p[2]; a[0][3]=p[9];
573 a[1][0]=p[3]; a[1][1]=p[4]; a[1][2]=p[5]; a[1][3]=p[10];
574 a[2][0]=p[6]; a[2][1]=p[7]; a[2][2]=p[8]; a[2][3]=p[11];
575 a[3][0]=0.; a[3][1]=0.; a[3][2]=0.; a[3][3]=1.;
580 Bool_t AliTPCcalibAlign::GetTransformation9(Int_t s1,Int_t s2,TMatrixD &a) {
582 // GetTransformation matrix - 9 paramaters - general linear transformation
585 if (!GetFitter9(s1,s2))
589 GetFitter9(s1,s2)->GetParameters(p);
591 a[0][0]=p[0]; a[0][1]=p[1]; a[0][2]=p[2]; a[0][3]=p[9];
592 a[1][0]=p[3]; a[1][1]=p[4]; a[1][2]=p[5]; a[1][3]=p[10];
593 a[2][0]=p[6]; a[2][1]=p[7]; a[2][2]=p[8]; a[2][3]=p[11];
594 a[3][0]=0.; a[3][1]=0.; a[3][2]=0.; a[3][3]=1.;
599 Bool_t AliTPCcalibAlign::GetTransformation6(Int_t s1,Int_t s2,TMatrixD &a) {
601 // GetTransformation matrix - 6 paramaters
605 if (!GetFitter6(s1,s2))
609 GetFitter6(s1,s2)->GetParameters(p);
611 a[0][0]=p[0]; a[0][1]=p[1]; a[0][2]=p[2]; a[0][3]=p[9];
612 a[1][0]=p[3]; a[1][1]=p[4]; a[1][2]=p[5]; a[1][3]=p[10];
613 a[2][0]=p[6]; a[2][1]=p[7]; a[2][2]=p[8]; a[2][3]=p[11];
614 a[3][0]=0.; a[3][1]=0.; a[3][2]=0.; a[3][3]=1.;
619 void AliTPCcalibAlign::FillHisto(const AliExternalTrackParam &tp1,
620 const AliExternalTrackParam &tp2,
623 // Fill residual histograms
625 if (s2-s1==36) {//only inner-outer
626 GetHisto(kPhi,s1,s2,kTRUE)->Fill(TMath::ASin(tp1.GetSnp())-TMath::ASin(tp2.GetSnp()));
627 GetHisto(kTheta,s1,s2,kTRUE)->Fill(TMath::ATan(tp1.GetTgl())-TMath::ATan(tp2.GetTgl()));
628 GetHisto(kY,s1,s2,kTRUE)->Fill(tp1.GetY()-tp2.GetY());
629 GetHisto(kZ,s1,s2,kTRUE)->Fill(tp1.GetZ()-tp2.GetZ());
635 TH1 * AliTPCcalibAlign::GetHisto(HistoType type, Int_t s1, Int_t s2, Bool_t force)
638 // return specified residual histogram - it is only QA
639 // if force specified the histogram and given histogram is not existing
640 // new histogram is created
642 if (GetIndex(s1,s2)>=72*72) return 0;
643 TObjArray *histoArray=0;
646 histoArray = &fDyHistArray; break;
648 histoArray = &fDzHistArray; break;
650 histoArray = &fDphiHistArray; break;
652 histoArray = &fDthetaHistArray; break;
654 TH1 * histo= (TH1*)histoArray->At(GetIndex(s1,s2));
655 if (histo) return histo;
656 if (force==kFALSE) return 0;
662 name<<"hist_y_"<<s1<<"_"<<s2;
663 title<<"Y Missalignment for sectors "<<s1<<" and "<<s2;
664 histo =new TH1D(name.str().c_str(),title.str().c_str(),512,-0.3,0.3); // +/- 3 mm
667 name<<"hist_z_"<<s1<<"_"<<s2;
668 title<<"Z Missalignment for sectors "<<s1<<" and "<<s2;
669 histo = new TH1D(name.str().c_str(),title.str().c_str(),512,-0.3,0.3); // +/- 3 mm
672 name<<"hist_phi_"<<s1<<"_"<<s2;
673 title<<"Phi Missalignment for sectors "<<s1<<" and "<<s2;
674 histo =new TH1D(name.str().c_str(),title.str().c_str(),512,-0.01,0.01); // +/- 10 mrad
677 name<<"hist_theta_"<<s1<<"_"<<s2;
678 title<<"Theta Missalignment for sectors "<<s1<<" and "<<s2;
679 histo =new TH1D(name.str().c_str(),title.str().c_str(),512,-0.01,0.01); // +/- 10 mrad
682 histo->SetDirectory(0);
683 histoArray->AddAt(histo,GetIndex(s1,s2));