/************************************************************************** * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * * * * Author: The ALICE Off-line Project. * * Contributors are mentioned in the code where appropriate. * * * * Permission to use, copy, modify and distribute this software and its * * documentation strictly for non-commercial purposes is hereby granted * * without fee, provided that the above copyright notice appears in all * * copies and that both the copyright notice and this permission notice * * appear in the supporting documentation. The authors make no claims * * about the suitability of this software for any purpose. It is * * provided "as is" without express or implied warranty. * **************************************************************************/ //////////////////////////////////////////////////////////////////////////// // // // AliGRPManager class // // The class can be used in order to access and read the Global Run // // Parameters entry from OCDB. // // It has a methods to set the magnetic field instanton and return // // the run and event info objects. // // // // cvetan.cheshkov@cern.ch 15/06/2009 // // // // Usage: // // AliGRPManager grpMan; // // Bool_t status = kTRUE; // // status = grpMan.ReadGRPEntry(); // Read the corresponding OCDB entry // // status = grpMan.SetMagField(); // Set global field instanton // // AliRunInfo *runInfo = grpMan.GetRunInfo();// Get instance of run info // // // // Note: CDB manager should be initialized beforehand // //////////////////////////////////////////////////////////////////////////// #include #include #include "AliGRPManager.h" #include "AliLog.h" #include "AliRunInfo.h" #include "AliGRPObject.h" #include "AliCDBManager.h" #include "AliCDBEntry.h" #include "AliMagF.h" ClassImp(AliGRPManager) //_____________________________________________________________________________ AliGRPManager::AliGRPManager() : TObject(), fGRPData(NULL) { // Default constructor } //_____________________________________________________________________________ AliGRPManager::~AliGRPManager() { // Destructor if (fGRPData) delete fGRPData; } //_____________________________________________________________________________ Bool_t AliGRPManager::ReadGRPEntry() { //------------------------------------ // Initialization of the GRP entry. // Returns kTRUE in case of success. //------------------------------------ AliCDBEntry* entry = AliCDBManager::Instance()->Get("GRP/GRP/Data"); if (entry) { TMap* m = dynamic_cast(entry->GetObject()); // old GRP entry if (m) { AliInfo("Found a TMap in GRP/GRP/Data, converting it into an AliGRPObject"); m->Print(); fGRPData = new AliGRPObject(); fGRPData->ReadValuesFromMap(m); } else { AliInfo("Found an AliGRPObject in GRP/GRP/Data, reading it"); fGRPData = dynamic_cast(entry->GetObject()); // new GRP entry entry->SetOwner(0); } AliCDBManager::Instance()->UnloadFromCache("GRP/GRP/Data"); } if (!fGRPData) { AliError("No GRP entry found in OCDB!"); return kFALSE; } return kTRUE; } //_____________________________________________________________________________ Bool_t AliGRPManager::SetMagField() { // Dealing with the magnetic field map // Construct the mag field map from the data in GRP // Set the global mag field instance if ( TGeoGlobalMagField::Instance()->IsLocked() ) { AliInfo("Running with the externally locked B field !"); } else { // Construct the field map out of the information retrieved from GRP. Bool_t ok = kTRUE; // L3 Float_t l3Current = fGRPData->GetL3Current((AliGRPObject::Stats)0); if (l3Current == AliGRPObject::GetInvalidFloat()) { AliError("GRP/GRP/Data entry: missing value for the L3 current !"); ok = kFALSE; } Char_t l3Polarity = fGRPData->GetL3Polarity(); if (l3Polarity == AliGRPObject::GetInvalidChar()) { AliError("GRP/GRP/Data entry: missing value for the L3 polarity !"); ok = kFALSE; } // Dipole Float_t diCurrent = fGRPData->GetDipoleCurrent((AliGRPObject::Stats)0); if (diCurrent == AliGRPObject::GetInvalidFloat()) { AliError("GRP/GRP/Data entry: missing value for the dipole current !"); ok = kFALSE; } Char_t diPolarity = fGRPData->GetDipolePolarity(); if (diPolarity == AliGRPObject::GetInvalidChar()) { AliError("GRP/GRP/Data entry: missing value for the dipole polarity !"); ok = kFALSE; } if (ok) { if ( !SetFieldMap(l3Current, diCurrent, l3Polarity ? -1:1, diPolarity ? -1:1) ) { AliError("Failed to create a B field map !"); ok = kFALSE; } AliInfo("Running with the B field constructed out of GRP !"); } else { AliError("B field is neither set nor constructed from GRP ! Exitig..."); } return ok; } return kTRUE; } //_____________________________________________________________________________ AliRunInfo* AliGRPManager::GetRunInfo() { // Constructs and returns an object // containing the run information // The user code is the owner of the object TString lhcState = fGRPData->GetLHCState(); if (lhcState==AliGRPObject::GetInvalidString()) { AliError("GRP/GRP/Data entry: missing value for the LHC state ! Using UNKNOWN"); lhcState = "UNKNOWN"; } TString beamType = fGRPData->GetBeamType(); if (beamType==AliGRPObject::GetInvalidString()) { AliError("GRP/GRP/Data entry: missing value for the beam type ! Using UNKNOWN"); beamType = "UNKNOWN"; } Float_t beamEnergy = fGRPData->GetBeamEnergy(); if (beamEnergy==AliGRPObject::GetInvalidFloat()) { AliError("GRP/GRP/Data entry: missing value for the beam energy ! Using 0"); beamEnergy = 0; } // energy is provided in MeV*120 beamEnergy /= 120E3; TString runType = fGRPData->GetRunType(); if (runType==AliGRPObject::GetInvalidString()) { AliError("GRP/GRP/Data entry: missing value for the run type ! Using UNKNOWN"); runType = "UNKNOWN"; } Int_t activeDetectors = fGRPData->GetDetectorMask(); if (activeDetectors==AliGRPObject::GetInvalidUInt()) { AliError("GRP/GRP/Data entry: missing value for the detector mask ! Using 1074790399"); activeDetectors = 1074790399; } return new AliRunInfo(lhcState, beamType, beamEnergy, runType, activeDetectors); } //_____________________________________________________________________________ Bool_t AliGRPManager::SetFieldMap(Float_t l3Cur, Float_t diCur, Float_t l3Pol, Float_t diPol, Float_t beamenergy, const Char_t *beamtype, const Char_t *path) { //------------------------------------------------ // The magnetic field map, defined externally... // L3 current 30000 A -> 0.5 T // L3 current 12000 A -> 0.2 T // dipole current 6000 A // The polarities must be the same //------------------------------------------------ const Float_t l3NominalCurrent1=30000.; // (A) const Float_t l3NominalCurrent2=12000.; // (A) const Float_t diNominalCurrent =6000. ; // (A) const Float_t tolerance=0.03; // relative current tolerance const Float_t zero=77.; // "zero" current (A) // TString s=(l3Pol < 0) ? "L3: -" : "L3: +"; // AliMagF::BMap_t map = AliMagF::k5kG; // double fcL3,fcDip; // l3Cur = TMath::Abs(l3Cur); if (TMath::Abs(l3Cur-l3NominalCurrent1)/l3NominalCurrent1 < tolerance) { fcL3 = l3Cur/l3NominalCurrent1; map = AliMagF::k5kG; s += "0.5 T; "; } else if (TMath::Abs(l3Cur-l3NominalCurrent2)/l3NominalCurrent2 < tolerance) { fcL3 = l3Cur/l3NominalCurrent2; map = AliMagF::k2kG; s += "0.2 T; "; } else if (l3Cur <= zero) { fcL3 = 0; map = AliMagF::k5kGUniform; s += "0.0 T; "; // fUniformField=kTRUE; // track with the uniform (zero) B field } else { AliError(Form("Wrong L3 current (%f A)!",l3Cur)); return kFALSE; } // diCur = TMath::Abs(diCur); if (TMath::Abs(diCur-diNominalCurrent)/diNominalCurrent < tolerance) { // 3% current tolerance... fcDip = diCur/diNominalCurrent; s += "Dipole ON"; } else if (diCur <= zero) { // some small current.. fcDip = 0.; s += "Dipole OFF"; } else { AliError(Form("Wrong dipole current (%f A)!",diCur)); return kFALSE; } // if (l3Pol!=diPol && (map==AliMagF::k5kG || map==AliMagF::k2kG) && fcDip!=0) { AliError("L3 and Dipole polarities must be the same"); return kFALSE; } // if (l3Pol<0) fcL3 = -fcL3; if (diPol<0) fcDip = -fcDip; // AliMagF::BeamType_t btype = AliMagF::kNoBeamField; TString btypestr = beamtype; btypestr.ToLower(); TPRegexp protonBeam("(proton|p)\\s*-?\\s*\\1"); TPRegexp ionBeam("(lead|pb|ion|a)\\s*-?\\s*\\1"); if (btypestr.Contains(ionBeam)) btype = AliMagF::kBeamTypeAA; else if (btypestr.Contains(protonBeam)) btype = AliMagF::kBeamTypepp; else { AliInfo(Form("Cannot determine the beam type from %s, assume no LHC magnet field",beamtype)); } AliMagF* fld = new AliMagF("MagneticFieldMap", s.Data(), 2, fcL3, fcDip, 10., map, path, btype,beamenergy); TGeoGlobalMagField::Instance()->SetField( fld ); TGeoGlobalMagField::Instance()->Lock(); // return kTRUE; }