- Compute parameter covariances including absorber dispersion effects
[u/mrichter/AliRoot.git] / MUON / MUONAlignment.C
CommitLineData
af9df62e 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/* $Id$ */
17
18// ---
19// Macro for MUON alignment using physics tracks. The macro uses AliMUONAlignment
20// class to calculate the alignment parameters.
21// An array for the alignment parameters is created and can be filled with
22// initial values that will be used as starting values by the alignment
23// algorithm.
24// Ny default the macro run over galice.root in the working directory. If a file list
25// of galice.root is provided as third argument the macro will run over all files.
26// The macro loop over the files, events and tracks. For each track
27// AliMUONAlignment::ProcessTrack(AliMUONTrack * track) and then
28// AliMUONAlignment::LocalFit(Int_t iTrack, Double_t *lTrackParam, Int_t
29// lSingleFit) are called. After all tracks have been procesed and fitted
30// AliMUONAlignment::GlobalFit(Double_t *parameters,Double_t *errors,Double_t *pulls)
31// is called. The array parameters contains the obatained misalignement parameters.
32// A realigned geometry is generated in a local CDB.
33//
34// Authors: B. Becker and J. Castillo
35// ---
36
2688ea9b 37#if !defined(__CINT__) || defined(__MAKECINT__)
38
39#include "AliMUONAlignment.h"
40#include "AliMUONTrack.h"
41#include "AliMUONTrackExtrap.h"
42#include "AliMUONTrackParam.h"
43#include "AliMUONGeometryTransformer.h"
44#include "AliMUONDataInterface.h"
7f8c1308 45#include "AliMUONVTrackStore.h"
2688ea9b 46
47#include "AliMagFMaps.h"
48#include "AliTracker.h"
49#include "AliCDBManager.h"
50#include "AliCDBMetaData.h"
51#include "AliCDBId.h"
a02fe82d 52#include "AliGeomManager.h"
2688ea9b 53
54#include <TString.h>
2688ea9b 55#include <TError.h>
56#include <TH1.h>
57#include <TGraphErrors.h>
58#include <TFile.h>
59#include <TClonesArray.h>
60#include <Riostream.h>
61
62#include <fstream>
63
64#endif
65
59830a87 66void MUONAlignment(Int_t nEvents = 100000, char* geoFilename = "geometry.root", TString fileName = "galice.root", TString fileList = "")
af9df62e 67{
68
59830a87 69 // Import TGeo geometry (needed by AliMUONTrackExtrap::ExtrapToVertex)
a02fe82d 70 if ( ! AliGeomManager::GetGeometry() ) {
71 AliGeomManager::LoadGeometry(geoFilename);
72 if (! AliGeomManager::GetGeometry() ) {
73 Error("MUONAlignment", "getting geometry from file %s failed", geoFilename);
59830a87 74 return;
75 }
76 }
77
78 // set mag field
79 // waiting for mag field in CDB
80 printf("Loading field map...\n");
81 AliMagFMaps* field = new AliMagFMaps("Maps","Maps", 1, 1., 10., AliMagFMaps::k5kG);
82 AliTracker::SetFieldMap(field, kFALSE);
83 // set the magnetic field for track extrapolations
84 AliMUONTrackExtrap::SetField(AliTracker::GetFieldMap());
85
af9df62e 86 Double_t parameters[3*156];
87 Double_t errors[3*156];
88 Double_t pulls[3*156];
89 for(Int_t k=0;k<3*156;k++) {
90 parameters[k]=0.;
91 errors[k]=0.;
92 pulls[k]=0.;
93 }
94
95 Double_t trackParams[8] = {0.,0.,0.,0.,0.,0.,0.,0.};
96
af9df62e 97 // Set initial values here, good guess may help convergence
98 // St 1
2688ea9b 99 // Int_t iPar = 0;
100 // parameters[iPar++] = 0.010300 ; parameters[iPar++] = 0.010600 ; parameters[iPar++] = 0.000396 ;
af9df62e 101
102 bool bLoop = kFALSE;
103 ifstream sFileList;
104 if (fileList.Contains(".list")) {
105 cout << "Reading file list: " << fileList.Data() << endl;
106 bLoop = kTRUE;
107
108 TString fullListName(".");
109 fullListName +="/";
110 fullListName +=fileList;
111 sFileList.open(fileList.Data());
112 }
113
114 TH1F *fInvBenMom = new TH1F("fInvBenMom","fInvBenMom",200,-0.1,0.1);
115 TH1F *fBenMom = new TH1F("fBenMom","fBenMom",200,-40,40);
116
117 AliMUONAlignment* alig = new AliMUONAlignment();
118 alig->InitGlobalParameters(parameters);
119
a02fe82d 120 AliMUONGeometryTransformer *transform = new AliMUONGeometryTransformer();
121 transform->LoadGeometryData();
af9df62e 122 alig->SetGeometryTransformer(transform);
7f8c1308 123
124 // Do alignment with magnetic field off
125 alig->SetBFieldOn(kFALSE);
587965bd 126
127 // Set tracking station to use
128 Bool_t bStOnOff[5] = {kTRUE,kTRUE,kTRUE,kTRUE,kTRUE};
129
130 // Fix parameters or add constraints here
131 for (Int_t iSt=0; iSt<5; iSt++)
132 if (!bStOnOff[iSt]) alig->FixStation(iSt+1);
133
134 // Left and right sides of the detector are independent, one can choose to align
135 // only one side
136 Bool_t bSpecLROnOff[2] = {kTRUE,kTRUE};
137 alig->FixHalfSpectrometer(bStOnOff,bSpecLROnOff);
138
139 // Set predifined global constrains: X, Y, P, XvsZ, YvsZ, PvsZ, XvsY, YvsY, PvsY
140 Bool_t bVarXYT[9] = {kTRUE,kTRUE,kTRUE,kTRUE,kTRUE,kTRUE,kTRUE,kTRUE,kTRUE};
141 Bool_t bDetTLBR[4] = {kFALSE,kTRUE,kFALSE,kTRUE};
142 alig->AddConstraints(bStOnOff,bVarXYT,bDetTLBR,bSpecLROnOff);
143
af9df62e 144
145 char cFileName[100];
7f8c1308 146 AliMUONDataInterface *amdi =0x0;
147 AliMUONVTrackStore *trackStore =0x0;
148 AliMUONTrack* track =0x0;
149
af9df62e 150 Int_t lMaxFile = 1000;
151 Int_t iFile = 0;
587965bd 152 Int_t iEvent = 0;
af9df62e 153 bool bKeepLoop = kTRUE;
587965bd 154 Int_t iTrackTot=0;
155 Int_t iTrackOk=0;
156
af9df62e 157 while(bKeepLoop && iFile<lMaxFile){
158 iFile++;
159 if (bLoop) {
160 sFileList.getline(cFileName,100);
161 if (sFileList.eof()) bKeepLoop = kFALSE;
162 }
163 else {
164 sprintf(cFileName,fileName.Data());
165 bKeepLoop = kFALSE;
166 }
167 if (!strstr(cFileName,"galice.root")) continue;
168 cout << "Using file: " << cFileName << endl;
7f8c1308 169
170 if (!amdi) amdi = new AliMUONDataInterface(cFileName);
171 else amdi->Open(cFileName);
172
173 Int_t nevents = amdi->NumberOfEvents();
587965bd 174 cout << "... with " << nevents << endl;
af9df62e 175 for(Int_t event = 0; event < nevents; event++) {
587965bd 176 if (iEvent >= nEvents){
177 bKeepLoop = kFALSE;
178 break;
179 }
180 iEvent++;
181
7f8c1308 182 trackStore = amdi->TrackStore(event);
183
184 Int_t ntracks = trackStore->GetSize();
587965bd 185 if (!event%100)
186 cout << " there are " << ntracks << " tracks in event " << event << endl;
7f8c1308 187 TIter next(trackStore->CreateIterator());
188 while ( ( track = static_cast<AliMUONTrack*>(next()) ) ) {
96ebe67e 189 AliMUONTrackParam trackParam(*((AliMUONTrackParam*)(track->GetTrackParamAtCluster()->First())));
690d2205 190 AliMUONTrackExtrap::ExtrapToVertex(&trackParam,0.,0.,0.,0.,0.);
8cde4af5 191 Double_t invBenMom = trackParam.GetInverseBendingMomentum();
af9df62e 192 fInvBenMom->Fill(invBenMom);
193 fBenMom->Fill(1./invBenMom);
194 if (TMath::Abs(invBenMom)<=1.04) {
af9df62e 195 alig->ProcessTrack(track);
af9df62e 196 alig->LocalFit(iTrackOk++,trackParams,0);
197 }
587965bd 198 iTrackTot++;
af9df62e 199 }
200 }
587965bd 201 cout << "Processed " << iTrackTot << " Tracks so far." << endl;
af9df62e 202 }
203 alig->GlobalFit(parameters,errors,pulls);
204
205 cout << "Done with GlobalFit " << endl;
206
207 // Store results
208 Double_t DEid[156] = {0};
209 Double_t MSDEx[156] = {0};
210 Double_t MSDEy[156] = {0};
211 Double_t MSDExt[156] = {0};
212 Double_t MSDEyt[156] = {0};
213 Double_t DEidErr[156] = {0};
214 Double_t MSDExErr[156] = {0};
215 Double_t MSDEyErr[156] = {0};
216 Double_t MSDExtErr[156] = {0};
217 Double_t MSDEytErr[156] = {0};
218 Int_t lNDetElem = 4*2+4*2+18*2+26*2+26*2;
219 Int_t lNDetElemCh[10] = {4,4,4,4,18,18,26,26,26,26};
2688ea9b 220 // Int_t lSNDetElemCh[10] = {4,8,12,16,34,52,78,104,130,156};
af9df62e 221 Int_t idOffset = 0; // 400
222 Int_t lSDetElemCh = 0;
223 for(Int_t iDE=0; iDE<lNDetElem; iDE++){
224 DEidErr[iDE] = 0.;
225 DEid[iDE] = idOffset+100;
226 DEid[iDE] += iDE;
227 lSDetElemCh = 0;
228 for(Int_t iCh=0; iCh<9; iCh++){
229 lSDetElemCh += lNDetElemCh[iCh];
230 if (iDE>=lSDetElemCh) {
231 DEid[iDE] += 100;
232 DEid[iDE] -= lNDetElemCh[iCh];
233 }
234 }
235 MSDEx[iDE]=parameters[3*iDE+0];
236 MSDEy[iDE]=parameters[3*iDE+1];
237 MSDExt[iDE]=parameters[3*iDE+2];
238 MSDEyt[iDE]=parameters[3*iDE+2];
239 MSDExErr[iDE]=(Double_t)alig->GetParError(3*iDE+0);
240 MSDEyErr[iDE]=(Double_t)alig->GetParError(3*iDE+1);
241 MSDExtErr[iDE]=(Double_t)alig->GetParError(3*iDE+2);
242 MSDEytErr[iDE]=(Double_t)alig->GetParError(3*iDE+2);
243 }
244
245 cout << "Let's create graphs ... " << endl;
246
247 TGraphErrors *gMSDEx = new TGraphErrors(lNDetElem,DEid,MSDEx,DEidErr,MSDExErr);
248 TGraphErrors *gMSDEy = new TGraphErrors(lNDetElem,DEid,MSDEy,DEidErr,MSDEyErr);
249 TGraphErrors *gMSDExt = new TGraphErrors(lNDetElem,DEid,MSDExt,DEidErr,MSDExtErr);
250 TGraphErrors *gMSDEyt = new TGraphErrors(lNDetElem,DEid,MSDEyt,DEidErr,MSDEytErr);
251
252 cout << "... graphs created, open file ... " << endl;
253
254 TFile *hFile = new TFile("measShifts.root","RECREATE");
255
256 cout << "... file opened ... " << endl;
257
258 gMSDEx->Write("gMSDEx");
259 gMSDEy->Write("gMSDEy");
260 gMSDExt->Write("gMSDExt");
261 gMSDEyt->Write("gMSDEyt");
262 fInvBenMom->Write();
263 fBenMom->Write();
264 hFile->Close();
265
266 cout << "... and closed!" << endl;
267 // Re Align
268 AliMUONGeometryTransformer *newTransform = alig->ReAlign(transform,parameters,true);
269 newTransform->WriteTransformations("transform2ReAlign.dat");
270
271 // Generate realigned data in local cdb
2688ea9b 272 const TClonesArray* array = newTransform->GetMisAlignmentData();
af9df62e 273
274 // CDB manager
275 AliCDBManager* cdbManager = AliCDBManager::Instance();
276 cdbManager->SetDefaultStorage("local://ReAlignCDB");
277
278 AliCDBMetaData* cdbData = new AliCDBMetaData();
279 cdbData->SetResponsible("Dimuon Offline project");
280 cdbData->SetComment("MUON alignment objects with residual misalignment");
281 AliCDBId id("MUON/Align/Data", 0, 0);
2688ea9b 282 cdbManager->Put(const_cast<TClonesArray*>(array), id, cdbData);
af9df62e 283
284}