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 **************************************************************************/
16 ////////////////////////////////////////////////////////////////////////////
18 // AliGRPManager class //
19 // The class can be used in order to access and read the Global Run //
20 // Parameters entry from OCDB. //
21 // It has a methods to set the magnetic field instanton and return //
22 // the run and event info objects. //
24 // cvetan.cheshkov@cern.ch 15/06/2009 //
27 // AliGRPManager grpMan; //
28 // Bool_t status = kTRUE; //
29 // status = grpMan.ReadGRPEntry(); // Read the corresponding OCDB entry //
30 // status = grpMan.SetMagField(); // Set global field instanton //
31 // AliRunInfo *runInfo = grpMan.GetRunInfo();// Get instance of run info //
33 // Note: CDB manager should be initialized beforehand //
34 ////////////////////////////////////////////////////////////////////////////
36 #include <TGeoGlobalMagField.h>
39 #include "AliGRPManager.h"
41 #include "AliRunInfo.h"
42 #include "AliGRPObject.h"
43 #include "AliCDBManager.h"
44 #include "AliCDBEntry.h"
47 ClassImp(AliGRPManager)
49 //_____________________________________________________________________________
50 AliGRPManager::AliGRPManager() :
54 // Default constructor
57 //_____________________________________________________________________________
58 AliGRPManager::~AliGRPManager()
61 if (fGRPData) delete fGRPData;
64 //_____________________________________________________________________________
65 Bool_t AliGRPManager::ReadGRPEntry()
67 //------------------------------------
68 // Initialization of the GRP entry.
69 // Returns kTRUE in case of success.
70 //------------------------------------
72 AliCDBEntry* entry = AliCDBManager::Instance()->Get("GRP/GRP/Data");
76 TMap* m = dynamic_cast<TMap*>(entry->GetObject()); // old GRP entry
79 AliInfo("Found a TMap in GRP/GRP/Data, converting it into an AliGRPObject");
81 fGRPData = new AliGRPObject();
82 fGRPData->ReadValuesFromMap(m);
86 AliInfo("Found an AliGRPObject in GRP/GRP/Data, reading it");
87 fGRPData = dynamic_cast<AliGRPObject*>(entry->GetObject()); // new GRP entry
91 AliCDBManager::Instance()->UnloadFromCache("GRP/GRP/Data");
95 AliError("No GRP entry found in OCDB!");
102 //_____________________________________________________________________________
103 Bool_t AliGRPManager::SetMagField()
105 // Dealing with the magnetic field map
106 // Construct the mag field map from the data in GRP
107 // Set the global mag field instance
109 if ( TGeoGlobalMagField::Instance()->IsLocked() ) {
110 AliInfo("Running with the externally locked B field !");
113 // Construct the field map out of the information retrieved from GRP.
116 Float_t l3Current = fGRPData->GetL3Current((AliGRPObject::Stats)0);
117 if (l3Current == AliGRPObject::GetInvalidFloat()) {
118 AliError("GRP/GRP/Data entry: missing value for the L3 current !");
122 Char_t l3Polarity = fGRPData->GetL3Polarity();
123 if (l3Polarity == AliGRPObject::GetInvalidChar()) {
124 AliError("GRP/GRP/Data entry: missing value for the L3 polarity !");
129 Float_t diCurrent = fGRPData->GetDipoleCurrent((AliGRPObject::Stats)0);
130 if (diCurrent == AliGRPObject::GetInvalidFloat()) {
131 AliError("GRP/GRP/Data entry: missing value for the dipole current !");
135 Char_t diPolarity = fGRPData->GetDipolePolarity();
136 if (diPolarity == AliGRPObject::GetInvalidChar()) {
137 AliError("GRP/GRP/Data entry: missing value for the dipole polarity !");
142 if ( !SetFieldMap(l3Current, diCurrent, l3Polarity ? -1:1, diPolarity ? -1:1) ) {
143 AliError("Failed to create a B field map !");
146 AliInfo("Running with the B field constructed out of GRP !");
149 AliError("B field is neither set nor constructed from GRP ! Exitig...");
157 //_____________________________________________________________________________
158 AliRunInfo* AliGRPManager::GetRunInfo()
160 // Constructs and returns an object
161 // containing the run information
162 // The user code is the owner of the object
164 TString lhcState = fGRPData->GetLHCState();
165 if (lhcState==AliGRPObject::GetInvalidString()) {
166 AliError("GRP/GRP/Data entry: missing value for the LHC state ! Using UNKNOWN");
167 lhcState = "UNKNOWN";
170 TString beamType = fGRPData->GetBeamType();
171 if (beamType==AliGRPObject::GetInvalidString()) {
172 AliError("GRP/GRP/Data entry: missing value for the beam type ! Using UNKNOWN");
173 beamType = "UNKNOWN";
176 Float_t beamEnergy = fGRPData->GetBeamEnergy();
177 if (beamEnergy==AliGRPObject::GetInvalidFloat()) {
178 AliError("GRP/GRP/Data entry: missing value for the beam energy ! Using 0");
181 // energy is provided in MeV*120
184 TString runType = fGRPData->GetRunType();
185 if (runType==AliGRPObject::GetInvalidString()) {
186 AliError("GRP/GRP/Data entry: missing value for the run type ! Using UNKNOWN");
190 Int_t activeDetectors = fGRPData->GetDetectorMask();
191 if (activeDetectors==AliGRPObject::GetInvalidUInt()) {
192 AliError("GRP/GRP/Data entry: missing value for the detector mask ! Using 1074790399");
193 activeDetectors = 1074790399;
196 return new AliRunInfo(lhcState, beamType, beamEnergy, runType, activeDetectors);
199 //_____________________________________________________________________________
200 Bool_t AliGRPManager::SetFieldMap(Float_t l3Cur, Float_t diCur, Float_t l3Pol,
201 Float_t diPol, Float_t beamenergy,
202 const Char_t *beamtype, const Char_t *path)
204 //------------------------------------------------
205 // The magnetic field map, defined externally...
206 // L3 current 30000 A -> 0.5 T
207 // L3 current 12000 A -> 0.2 T
208 // dipole current 6000 A
209 // The polarities must be the same
210 //------------------------------------------------
211 const Float_t l3NominalCurrent1=30000.; // (A)
212 const Float_t l3NominalCurrent2=12000.; // (A)
213 const Float_t diNominalCurrent =6000. ; // (A)
215 const Float_t tolerance=0.03; // relative current tolerance
216 const Float_t zero=77.; // "zero" current (A)
218 TString s=(l3Pol < 0) ? "L3: -" : "L3: +";
220 AliMagF::BMap_t map = AliMagF::k5kG;
224 l3Cur = TMath::Abs(l3Cur);
225 if (TMath::Abs(l3Cur-l3NominalCurrent1)/l3NominalCurrent1 < tolerance) {
226 fcL3 = l3Cur/l3NominalCurrent1;
229 } else if (TMath::Abs(l3Cur-l3NominalCurrent2)/l3NominalCurrent2 < tolerance) {
230 fcL3 = l3Cur/l3NominalCurrent2;
233 } else if (l3Cur <= zero) {
235 map = AliMagF::k5kGUniform;
237 // fUniformField=kTRUE; // track with the uniform (zero) B field
239 AliError(Form("Wrong L3 current (%f A)!",l3Cur));
243 diCur = TMath::Abs(diCur);
244 if (TMath::Abs(diCur-diNominalCurrent)/diNominalCurrent < tolerance) {
245 // 3% current tolerance...
246 fcDip = diCur/diNominalCurrent;
248 } else if (diCur <= zero) { // some small current..
252 AliError(Form("Wrong dipole current (%f A)!",diCur));
256 if (l3Pol!=diPol && (map==AliMagF::k5kG || map==AliMagF::k2kG) && fcDip!=0) {
257 AliError("L3 and Dipole polarities must be the same");
261 if (l3Pol<0) fcL3 = -fcL3;
262 if (diPol<0) fcDip = -fcDip;
264 AliMagF::BeamType_t btype = AliMagF::kNoBeamField;
265 TString btypestr = beamtype;
267 TPRegexp protonBeam("(proton|p)\\s*-?\\s*\\1");
268 TPRegexp ionBeam("(lead|pb|ion|a)\\s*-?\\s*\\1");
269 if (btypestr.Contains(ionBeam)) btype = AliMagF::kBeamTypeAA;
270 else if (btypestr.Contains(protonBeam)) btype = AliMagF::kBeamTypepp;
272 AliInfo(Form("Cannot determine the beam type from %s, assume no LHC magnet field",beamtype));
275 AliMagF* fld = new AliMagF("MagneticFieldMap", s.Data(), 2, fcL3, fcDip, 10., map, path,
277 TGeoGlobalMagField::Instance()->SetField( fld );
278 TGeoGlobalMagField::Instance()->Lock();