ClassImp(AliMagF)
const Double_t AliMagF::fgkSol2DipZ = -700.;
-const UShort_t AliMagF::fgkPolarityConvention = kConvLHC;
-
+const UShort_t AliMagF::fgkPolarityConvention = AliMagF::kConvLHC;
/*
Explanation for polarity conventions: these are the mapping between the
current signs and main field components in L3 (Bz) and Dipole (Bx) (in Alice frame)
Note: only "negative Bz(L3) with postive Bx(Dipole)" and its inverse was mapped in 2005. Hence
the GRP Manager will reject the runs with the current combinations (in the convention defined by the
static Int_t AliMagF::GetPolarityConvention()) which do not lead to such field polarities.
+
+ -----------------------------------------------
+
+ Explanation on integrals in the TPC region
+ GetTPCInt(xyz,b) and GetTPCRatInt(xyz,b) give integrals from point (x,y,z) to point (x,y,0)
+ (irrespectively of the z sign) of the following:
+ TPCInt: b contains int{bx}, int{by}, int{bz}
+ TPCRatInt: b contains int{bx/bz}, int{by/bz}, int{(bx/bz)^2+(by/bz)^2}
+
+ The same applies to integral in cylindrical coordinates:
+ GetTPCIntCyl(rphiz,b)
+ GetTPCIntRatCyl(rphiz,b)
+ They accept the R,Phi,Z coordinate (-pi<phi<pi) and return the field
+ integrals in cyl. coordinates.
+
+ Thus, to compute the integral from arbitrary xy_z1 to xy_z2, one should take
+ b = b1-b2 with b1 and b2 coming from GetTPCInt(xy_z1,b1) and GetTPCInt(xy_z2,b2)
+
+ Note: the integrals are defined for the range -300<Z<300 and 0<R<300
*/
//_______________________________________________________________________
AliMagF::AliMagF():
//
if (fBeamEnergy<=0 && fBeamType!=kNoBeamField) {
if (fBeamType == kBeamTypepp) fBeamEnergy = 7000.; // max proton energy
- else if (fBeamType == kBeamTypeAA) fBeamEnergy = 2750; // max PbPb energy
+ else if (fBeamType == kBeamTypeAA) fBeamEnergy = 2760; // max PbPb energy
AliInfo("Maximim possible beam energy for requested beam is assumed");
}
const char* parname = 0;
fSolenoid = GetBz(xyz);
SetFactorSol(factorSol);
SetFactorDip(factorDip);
- AliInfo(Form("Alice B fields: Solenoid (%+.2f*)%.0f kG, Dipole %s (%+.2f) %s",
- factorSol,(fMapType==k5kG||fMapType==k5kGUniform)?5.:2.,
- fDipoleOFF ? "OFF":"ON",factorDip,fMapType==k5kGUniform?" |Constant Field!":""));
- AliInfo(Form("Machine B fields for %s beam (%.0f GeV): QGrad: %.4f Dipole: %.4f",
- bt==kBeamTypeAA ? "A-A":(bt==kBeamTypepp ? "p-p":"OFF"),be,fQuadGradient,fDipoleField));
+ Print("a");
}
//_______________________________________________________________________
Bool_t AliMagF::LoadParameterization()
{
if (fMeasuredMap) {
- AliError(Form("Field data %s are already loaded from %s\n",GetParamName(),GetDataFileName()));
- return kTRUE;
+ AliFatal(Form("Field data %s are already loaded from %s\n",GetParamName(),GetDataFileName()));
}
//
char* fname = gSystem->ExpandPathName(GetDataFileName());
TFile* file = TFile::Open(fname);
if (!file) {
- AliError(Form("Failed to open magnetic field data file %s\n",fname));
- return kFALSE;
+ AliFatal(Form("Failed to open magnetic field data file %s\n",fname));
}
//
fMeasuredMap = dynamic_cast<AliMagWrapCheb*>(file->Get(GetParamName()));
if (!fMeasuredMap) {
- AliError(Form("Did not find field %s in %s\n",GetParamName(),fname));
- return kFALSE;
+ AliFatal(Form("Did not find field %s in %s\n",GetParamName(),fname));
}
file->Close();
delete file;
//_______________________________________________________________________
void AliMagF::GetTPCInt(const Double_t *xyz, Double_t *b) const
{
- // Method to calculate the integral of magnetic integral from xyz to nearest cathode plane
+ // Method to calculate the integral_0^z of br,bt,bz
b[0]=b[1]=b[2]=0.0;
if (fMeasuredMap) {
fMeasuredMap->GetTPCInt(xyz,b);
}
}
+//_______________________________________________________________________
+void AliMagF::GetTPCRatInt(const Double_t *xyz, Double_t *b) const
+{
+ // Method to calculate the integral_0^z of bx/bz,by/bz and (bx/bz)^2+(by/bz)^2
+ b[0]=b[1]=b[2]=0.0;
+ if (fMeasuredMap) {
+ fMeasuredMap->GetTPCRatInt(xyz,b);
+ b[2] /= 100;
+ }
+}
+
//_______________________________________________________________________
void AliMagF::GetTPCIntCyl(const Double_t *rphiz, Double_t *b) const
{
- // Method to calculate the integral of magnetic integral from point to nearest cathode plane
+ // Method to calculate the integral_0^z of br,bt,bz
// in cylindrical coordiates ( -pi<phi<pi convention )
b[0]=b[1]=b[2]=0.0;
if (fMeasuredMap) {
}
}
+//_______________________________________________________________________
+void AliMagF::GetTPCRatIntCyl(const Double_t *rphiz, Double_t *b) const
+{
+ // Method to calculate the integral_0^z of bx/bz,by/bz and (bx/bz)^2+(by/bz)^2
+ // in cylindrical coordiates ( -pi<phi<pi convention )
+ b[0]=b[1]=b[2]=0.0;
+ if (fMeasuredMap) {
+ fMeasuredMap->GetTPCRatIntCyl(rphiz,b);
+ b[2] /= 100;
+ }
+}
+
//_______________________________________________________________________
void AliMagF::SetFactorSol(Float_t fc)
{
//_____________________________________________________________________________
AliMagF* AliMagF::CreateFieldMap(Float_t l3Cur, Float_t diCur, Int_t convention, Bool_t uniform,
- Float_t sqrts, const Char_t *beamtype, const Char_t *path)
+ Float_t beamenergy, const Char_t *beamtype, const Char_t *path)
{
//------------------------------------------------
// The magnetic field map, defined externally...
const Float_t tolerance=0.03; // relative current tolerance
const Float_t zero=77.; // "zero" current (A)
//
- BMap_t map;
+ BMap_t map = k5kG;
double sclL3,sclDip;
//
Float_t l3Pol = l3Cur > 0 ? 1:-1;
if (TMath::Abs((sclDip=diCur/diNominalCurrent)-1.) > tolerance && !uniform) {
if (diCur <= zero) sclDip = 0.; // some small current.. -> Dipole OFF
else {
- AliErrorGeneral("AliMagF",Form("Wrong dipole current (%f A)!",diCur));
- return 0;
+ AliFatalGeneral("AliMagF",Form("Wrong dipole current (%f A)!",diCur));
}
}
//
else {
if (TMath::Abs((sclL3=l3Cur/l3NominalCurrent1)-1.) < tolerance) map = k5kG;
else if (TMath::Abs((sclL3=l3Cur/l3NominalCurrent2)-1.) < tolerance) map = k2kG;
- else if (l3Cur <= zero) { sclL3 = 0; map = k5kGUniform;}
+ else if (l3Cur <= zero && diCur<=zero) { sclL3=0; sclDip=0; map = k5kGUniform;}
else {
- AliErrorGeneral("AliMagF",Form("Wrong L3 current (%f A)!",l3Cur));
- return 0;
+ AliFatalGeneral("AliMagF",Form("Wrong L3 current (%f A)!",l3Cur));
}
}
//
- if (sclDip!=0 && (map==k5kG || map==k2kG) &&
- ((convention==kConvLHC && l3Pol!=diPol) ||
- (convention==kConvDCS2008 && l3Pol==diPol)) ) {
- AliErrorGeneral("AliMagF",Form("Wrong combination for L3/Dipole polarities (%c/%c) for convention %d",
- l3Pol>0?'+':'-',diPol>0?'+':'-',GetPolarityConvention()));
- return 0;
+ if (sclDip!=0 && map!=k5kGUniform) {
+ if ( (l3Cur<=zero) || ((convention==kConvLHC && l3Pol!=diPol) || (convention==kConvDCS2008 && l3Pol==diPol)) ) {
+ AliFatalGeneral("AliMagF",Form("Wrong combination for L3/Dipole polarities (%c/%c) for convention %d",
+ l3Pol>0?'+':'-',diPol>0?'+':'-',GetPolarityConvention()));
+ }
}
//
if (l3Pol<0) sclL3 = -sclL3;
else if (btypestr.Contains(protonBeam)) btype = kBeamTypepp;
else AliInfoGeneral("AliMagF",Form("Assume no LHC magnet field for the beam type %s, ",beamtype));
char ttl[80];
- sprintf(ttl,"L3: %+5d Dip: %+4d kA; %s | Polarities in %s convention",(int)TMath::Sign(l3Cur,float(sclL3)),
+ snprintf(ttl,79,"L3: %+5d Dip: %+4d kA; %s | Polarities in %s convention",(int)TMath::Sign(l3Cur,float(sclL3)),
(int)TMath::Sign(diCur,float(sclDip)),uniform ? " Constant":"",
convention==kConvLHC ? "LHC":"DCS2008");
// LHC and DCS08 conventions have opposite dipole polarities
if ( GetPolarityConvention() != convention) sclDip = -sclDip;
//
- return new AliMagF("MagneticFieldMap", ttl,sclL3,sclDip,map,btype,sqrts/2,2,10.,path);
+ return new AliMagF("MagneticFieldMap", ttl,sclL3,sclDip,map,btype,beamenergy,2,10.,path);
//
}
}
}
+//_____________________________________________________________________________
+void AliMagF::Print(Option_t *opt) const
+{
+ // print short or long info
+ TString opts = opt; opts.ToLower();
+ AliInfo(Form("%s:%s",GetName(),GetTitle()));
+ AliInfo(Form("Solenoid (%+.2f*)%.0f kG, Dipole %s (%+.2f) %s",
+ GetFactorSol(),(fMapType==k5kG||fMapType==k5kGUniform)?5.:2.,
+ fDipoleOFF ? "OFF":"ON",GetFactorDip(),fMapType==k5kGUniform?" |Constant Field!":""));
+ if (opts.Contains("a")) {
+ AliInfo(Form("Machine B fields for %s beam (%.0f GeV): QGrad: %.4f Dipole: %.4f",
+ fBeamType==kBeamTypeAA ? "A-A":(fBeamType==kBeamTypepp ? "p-p":"OFF"),
+ fBeamEnergy,fQuadGradient,fDipoleField));
+ AliInfo(Form("Uses %s of %s",GetParamName(),GetDataFileName()));
+ }
+}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff