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4c039060 | 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 | ||
4c039060 | 16 | |
db83d72f | 17 | #include <TClass.h> |
18 | #include <TFile.h> | |
19 | #include <TSystem.h> | |
33fe5eb1 | 20 | #include <TPRegexp.h> |
fe4da5cc | 21 | |
22 | #include "AliMagF.h" | |
db83d72f | 23 | #include "AliMagWrapCheb.h" |
24 | #include "AliLog.h" | |
972ca52f | 25 | |
fe4da5cc | 26 | ClassImp(AliMagF) |
27 | ||
9251fceb | 28 | const Double_t AliMagF::fgkSol2DipZ = -700.; |
1dd3d90e | 29 | const UShort_t AliMagF::fgkPolarityConvention = kConvLHC; |
db83d72f | 30 | |
1dd3d90e | 31 | /* |
32 | Explanation for polarity conventions: these are the mapping between the | |
33 | current signs and main field components in L3 (Bz) and Dipole (Bx) (in Alice frame) | |
34 | 1) kConvMap2005: used for the field mapping in 2005 | |
35 | positive L3 current -> negative Bz | |
36 | positive Dip current -> positive Bx | |
37 | 2) kConvMapDCS2008: defined by the microswitches/cabling of power converters as of 2008 - 1st half 2009 | |
38 | positive L3 current -> positive Bz | |
39 | positive Dip current -> positive Bx | |
40 | 3) kConvLHC : defined by LHC | |
e3eadfac | 41 | positive L3 current -> positive Bz |
1dd3d90e | 42 | positive Dip current -> negative Bx |
43 | ||
44 | Note: only "negative Bz(L3) with postive Bx(Dipole)" and its inverse was mapped in 2005. Hence | |
45 | the GRP Manager will reject the runs with the current combinations (in the convention defined by the | |
46 | static Int_t AliMagF::GetPolarityConvention()) which do not lead to such field polarities. | |
47 | */ | |
e2afb3b6 | 48 | //_______________________________________________________________________ |
49 | AliMagF::AliMagF(): | |
db83d72f | 50 | TVirtualMagField(), |
51 | fMeasuredMap(0), | |
52 | fMapType(k5kG), | |
53 | fSolenoid(0), | |
54 | fBeamType(kNoBeamField), | |
55 | fBeamEnergy(0), | |
db83d72f | 56 | // |
e2afb3b6 | 57 | fInteg(0), |
db83d72f | 58 | fPrecInteg(0), |
59 | fFactorSol(1.), | |
60 | fFactorDip(1.), | |
61 | fMax(15), | |
62 | fDipoleOFF(kFALSE), | |
e2afb3b6 | 63 | // |
db83d72f | 64 | fQuadGradient(0), |
65 | fDipoleField(0), | |
66 | fCCorrField(0), | |
67 | fACorr1Field(0), | |
68 | fACorr2Field(0), | |
69 | fParNames("","") | |
70 | { | |
e2afb3b6 | 71 | // Default constructor |
72 | // | |
73 | } | |
74 | ||
75 | //_______________________________________________________________________ | |
4642ac4b | 76 | AliMagF::AliMagF(const char *name, const char* title, Double_t factorSol, Double_t factorDip, |
02233f2b | 77 | BMap_t maptype, BeamType_t bt, Double_t be,Int_t integ, Double_t fmax, const char* path): |
db83d72f | 78 | TVirtualMagField(name), |
79 | fMeasuredMap(0), | |
80 | fMapType(maptype), | |
81 | fSolenoid(0), | |
02233f2b | 82 | fBeamType(bt), |
83 | fBeamEnergy(be), | |
db83d72f | 84 | // |
85 | fInteg(integ), | |
604e0531 | 86 | fPrecInteg(1), |
db83d72f | 87 | fFactorSol(1.), |
88 | fFactorDip(1.), | |
972ca52f | 89 | fMax(fmax), |
db83d72f | 90 | fDipoleOFF(factorDip==0.), |
91 | // | |
92 | fQuadGradient(0), | |
93 | fDipoleField(0), | |
94 | fCCorrField(0), | |
95 | fACorr1Field(0), | |
96 | fACorr2Field(0), | |
97 | fParNames("","") | |
fe4da5cc | 98 | { |
9251fceb | 99 | // Initialize the field with Geant integration option "integ" and max field "fmax, |
100 | // Impose scaling of parameterized L3 field by factorSol and of dipole by factorDip. | |
101 | // The "be" is the energy of the beam in GeV/nucleon | |
aee8290b | 102 | // |
db83d72f | 103 | SetTitle(title); |
104 | if(integ<0 || integ > 2) { | |
105 | AliWarning(Form("Invalid magnetic field flag: %5d; Helix tracking chosen instead",integ)); | |
106 | fInteg = 2; | |
107 | } | |
108 | if (fInteg == 0) fPrecInteg = 0; | |
aee8290b | 109 | // |
4642ac4b | 110 | if (fBeamEnergy<=0 && fBeamType!=kNoBeamField) { |
111 | if (fBeamType == kBeamTypepp) fBeamEnergy = 7000.; // max proton energy | |
02233f2b | 112 | else if (fBeamType == kBeamTypeAA) fBeamEnergy = 2750; // max PbPb energy |
4642ac4b | 113 | AliInfo("Maximim possible beam energy for requested beam is assumed"); |
114 | } | |
db83d72f | 115 | const char* parname = 0; |
116 | // | |
f04e7f5f | 117 | if (fMapType == k2kG) parname = fDipoleOFF ? "Sol12_Dip0_Hole":"Sol12_Dip6_Hole"; |
118 | else if (fMapType == k5kG) parname = fDipoleOFF ? "Sol30_Dip0_Hole":"Sol30_Dip6_Hole"; | |
119 | else if (fMapType == k5kGUniform) parname = "Sol30_Dip6_Uniform"; | |
120 | else AliFatal(Form("Unknown field identifier %d is requested\n",fMapType)); | |
db83d72f | 121 | // |
122 | SetDataFileName(path); | |
123 | SetParamName(parname); | |
124 | // | |
db83d72f | 125 | LoadParameterization(); |
126 | InitMachineField(fBeamType,fBeamEnergy); | |
f04e7f5f | 127 | double xyz[3]={0.,0.,0.}; |
128 | fSolenoid = GetBz(xyz); | |
129 | SetFactorSol(factorSol); | |
130 | SetFactorDip(factorDip); | |
e86708b3 | 131 | AliInfo(Form("Alice B fields: Solenoid (%+.2f*)%.0f kG, Dipole %s (%+.2f) %s", |
132 | factorSol,(fMapType==k5kG||fMapType==k5kGUniform)?5.:2., | |
439b5096 | 133 | fDipoleOFF ? "OFF":"ON",factorDip,fMapType==k5kGUniform?" |Constant Field!":"")); |
134 | AliInfo(Form("Machine B fields for %s beam (%.0f GeV): QGrad: %.4f Dipole: %.4f", | |
02233f2b | 135 | bt==kBeamTypeAA ? "A-A":(bt==kBeamTypepp ? "p-p":"OFF"),be,fQuadGradient,fDipoleField)); |
fe4da5cc | 136 | } |
137 | ||
eeda4611 | 138 | //_______________________________________________________________________ |
139 | AliMagF::AliMagF(const AliMagF &src): | |
db83d72f | 140 | TVirtualMagField(src), |
141 | fMeasuredMap(0), | |
142 | fMapType(src.fMapType), | |
143 | fSolenoid(src.fSolenoid), | |
144 | fBeamType(src.fBeamType), | |
145 | fBeamEnergy(src.fBeamEnergy), | |
eeda4611 | 146 | fInteg(src.fInteg), |
147 | fPrecInteg(src.fPrecInteg), | |
db83d72f | 148 | fFactorSol(src.fFactorSol), |
149 | fFactorDip(src.fFactorDip), | |
eeda4611 | 150 | fMax(src.fMax), |
db83d72f | 151 | fDipoleOFF(src.fDipoleOFF), |
152 | fQuadGradient(src.fQuadGradient), | |
153 | fDipoleField(src.fDipoleField), | |
154 | fCCorrField(src.fCCorrField), | |
155 | fACorr1Field(src.fACorr1Field), | |
156 | fACorr2Field(src.fACorr2Field), | |
157 | fParNames(src.fParNames) | |
eeda4611 | 158 | { |
db83d72f | 159 | if (src.fMeasuredMap) fMeasuredMap = new AliMagWrapCheb(*src.fMeasuredMap); |
eeda4611 | 160 | } |
161 | ||
e2afb3b6 | 162 | //_______________________________________________________________________ |
db83d72f | 163 | AliMagF::~AliMagF() |
ff66b122 | 164 | { |
db83d72f | 165 | delete fMeasuredMap; |
166 | } | |
167 | ||
168 | //_______________________________________________________________________ | |
169 | Bool_t AliMagF::LoadParameterization() | |
170 | { | |
171 | if (fMeasuredMap) { | |
172 | AliError(Form("Field data %s are already loaded from %s\n",GetParamName(),GetDataFileName())); | |
173 | return kTRUE; | |
174 | } | |
ff66b122 | 175 | // |
db83d72f | 176 | char* fname = gSystem->ExpandPathName(GetDataFileName()); |
177 | TFile* file = TFile::Open(fname); | |
178 | if (!file) { | |
179 | AliError(Form("Failed to open magnetic field data file %s\n",fname)); | |
180 | return kFALSE; | |
181 | } | |
ff66b122 | 182 | // |
db83d72f | 183 | fMeasuredMap = dynamic_cast<AliMagWrapCheb*>(file->Get(GetParamName())); |
184 | if (!fMeasuredMap) { | |
185 | AliError(Form("Did not find field %s in %s\n",GetParamName(),fname)); | |
186 | return kFALSE; | |
187 | } | |
188 | file->Close(); | |
189 | delete file; | |
190 | return kTRUE; | |
ff66b122 | 191 | } |
192 | ||
db83d72f | 193 | |
ff66b122 | 194 | //_______________________________________________________________________ |
db83d72f | 195 | void AliMagF::Field(const Double_t *xyz, Double_t *b) |
fe4da5cc | 196 | { |
db83d72f | 197 | // Method to calculate the field at point xyz |
aee8290b | 198 | // |
9251fceb | 199 | // b[0]=b[1]=b[2]=0.0; |
200 | if (fMeasuredMap && xyz[2]>fMeasuredMap->GetMinZ() && xyz[2]<fMeasuredMap->GetMaxZ()) { | |
db83d72f | 201 | fMeasuredMap->Field(xyz,b); |
202 | if (xyz[2]>fgkSol2DipZ || fDipoleOFF) for (int i=3;i--;) b[i] *= fFactorSol; | |
9251fceb | 203 | else for (int i=3;i--;) b[i] *= fFactorDip; |
db83d72f | 204 | } |
9251fceb | 205 | else MachineField(xyz, b); |
aee8290b | 206 | // |
fe4da5cc | 207 | } |
eeda4611 | 208 | |
209 | //_______________________________________________________________________ | |
db83d72f | 210 | Double_t AliMagF::GetBz(const Double_t *xyz) const |
eeda4611 | 211 | { |
db83d72f | 212 | // Method to calculate the field at point xyz |
213 | // | |
9251fceb | 214 | if (fMeasuredMap && xyz[2]>fMeasuredMap->GetMinZ() && xyz[2]<fMeasuredMap->GetMaxZ()) { |
215 | double bz = fMeasuredMap->GetBz(xyz); | |
216 | return (xyz[2]>fgkSol2DipZ || fDipoleOFF) ? bz*fFactorSol : bz*fFactorDip; | |
db83d72f | 217 | } |
9251fceb | 218 | else return 0.; |
eeda4611 | 219 | } |
220 | ||
221 | //_______________________________________________________________________ | |
db83d72f | 222 | AliMagF& AliMagF::operator=(const AliMagF& src) |
eeda4611 | 223 | { |
db83d72f | 224 | if (this != &src && src.fMeasuredMap) { |
225 | if (fMeasuredMap) delete fMeasuredMap; | |
226 | fMeasuredMap = new AliMagWrapCheb(*src.fMeasuredMap); | |
227 | SetName(src.GetName()); | |
228 | fSolenoid = src.fSolenoid; | |
229 | fBeamType = src.fBeamType; | |
230 | fBeamEnergy = src.fBeamEnergy; | |
db83d72f | 231 | fInteg = src.fInteg; |
232 | fPrecInteg = src.fPrecInteg; | |
233 | fFactorSol = src.fFactorSol; | |
234 | fFactorDip = src.fFactorDip; | |
235 | fMax = src.fMax; | |
236 | fDipoleOFF = src.fDipoleOFF; | |
237 | fParNames = src.fParNames; | |
238 | } | |
239 | return *this; | |
eeda4611 | 240 | } |
241 | ||
242 | //_______________________________________________________________________ | |
db83d72f | 243 | void AliMagF::InitMachineField(BeamType_t btype, Double_t benergy) |
eeda4611 | 244 | { |
4642ac4b | 245 | if (btype==kNoBeamField) { |
db83d72f | 246 | fQuadGradient = fDipoleField = fCCorrField = fACorr1Field = fACorr2Field = 0.; |
9251fceb | 247 | return; |
db83d72f | 248 | } |
249 | // | |
9251fceb | 250 | double rigScale = benergy/7000.; // scale according to ratio of E/Enominal |
251 | // for ions assume PbPb (with energy provided per nucleon) and account for A/Z | |
252 | if (btype == kBeamTypeAA) rigScale *= 208./82.; | |
253 | // | |
254 | fQuadGradient = 22.0002*rigScale; | |
255 | fDipoleField = 37.8781*rigScale; | |
256 | // | |
257 | // SIDE C | |
258 | fCCorrField = -9.6980; | |
259 | // SIDE A | |
260 | fACorr1Field = -13.2247; | |
261 | fACorr2Field = 11.7905; | |
db83d72f | 262 | // |
eeda4611 | 263 | } |
eed8a1a2 | 264 | |
db83d72f | 265 | //_______________________________________________________________________ |
266 | void AliMagF::MachineField(const Double_t *x, Double_t *b) const | |
eed8a1a2 | 267 | { |
db83d72f | 268 | // ---- This is the ZDC part |
9251fceb | 269 | // Compansators for Alice Muon Arm Dipole |
270 | const Double_t kBComp1CZ = 1075., kBComp1hDZ = 260./2., kBComp1SqR = 4.0*4.0; | |
271 | const Double_t kBComp2CZ = 2049., kBComp2hDZ = 153./2., kBComp2SqR = 4.5*4.5; | |
272 | // | |
273 | const Double_t kTripQ1CZ = 2615., kTripQ1hDZ = 637./2., kTripQ1SqR = 3.5*3.5; | |
90ae20c9 | 274 | const Double_t kTripQ2CZ = 3480., kTripQ2hDZ = 550./2., kTripQ2SqR = 3.5*3.5; |
9251fceb | 275 | const Double_t kTripQ3CZ = 4130., kTripQ3hDZ = 550./2., kTripQ3SqR = 3.5*3.5; |
276 | const Double_t kTripQ4CZ = 5015., kTripQ4hDZ = 637./2., kTripQ4SqR = 3.5*3.5; | |
db83d72f | 277 | // |
9251fceb | 278 | const Double_t kDip1CZ = 6310.8, kDip1hDZ = 945./2., kDip1SqRC = 4.5*4.5, kDip1SqRA = 3.375*3.375; |
279 | const Double_t kDip2CZ = 12640.3, kDip2hDZ = 945./2., kDip2SqRC = 4.5*4.5, kDip2SqRA = 3.75*3.75; | |
280 | const Double_t kDip2DXC = 9.7, kDip2DXA = 9.4; | |
db83d72f | 281 | // |
282 | double rad2 = x[0] * x[0] + x[1] * x[1]; | |
283 | // | |
9251fceb | 284 | b[0] = b[1] = b[2] = 0; |
285 | // | |
db83d72f | 286 | // SIDE C ************************************************** |
287 | if(x[2]<0.){ | |
9251fceb | 288 | if(TMath::Abs(x[2]+kBComp2CZ)<kBComp2hDZ && rad2 < kBComp2SqR){ |
289 | b[0] = fCCorrField*fFactorDip; | |
db83d72f | 290 | } |
9251fceb | 291 | else if(TMath::Abs(x[2]+kTripQ1CZ)<kTripQ1hDZ && rad2 < kTripQ1SqR){ |
db83d72f | 292 | b[0] = fQuadGradient*x[1]; |
293 | b[1] = fQuadGradient*x[0]; | |
db83d72f | 294 | } |
9251fceb | 295 | else if(TMath::Abs(x[2]+kTripQ2CZ)<kTripQ2hDZ && rad2 < kTripQ2SqR){ |
db83d72f | 296 | b[0] = -fQuadGradient*x[1]; |
297 | b[1] = -fQuadGradient*x[0]; | |
db83d72f | 298 | } |
9251fceb | 299 | else if(TMath::Abs(x[2]+kTripQ3CZ)<kTripQ3hDZ && rad2 < kTripQ3SqR){ |
db83d72f | 300 | b[0] = -fQuadGradient*x[1]; |
301 | b[1] = -fQuadGradient*x[0]; | |
db83d72f | 302 | } |
9251fceb | 303 | else if(TMath::Abs(x[2]+kTripQ4CZ)<kTripQ4hDZ && rad2 < kTripQ4SqR){ |
db83d72f | 304 | b[0] = fQuadGradient*x[1]; |
305 | b[1] = fQuadGradient*x[0]; | |
db83d72f | 306 | } |
9251fceb | 307 | else if(TMath::Abs(x[2]+kDip1CZ)<kDip1hDZ && rad2 < kDip1SqRC){ |
db83d72f | 308 | b[1] = fDipoleField; |
db83d72f | 309 | } |
9251fceb | 310 | else if(TMath::Abs(x[2]+kDip2CZ)<kDip2hDZ && rad2 < kDip2SqRC) { |
311 | double dxabs = TMath::Abs(x[0])-kDip2DXC; | |
312 | if ( (dxabs*dxabs + x[1]*x[1])<kDip2SqRC) { | |
db83d72f | 313 | b[1] = -fDipoleField; |
db83d72f | 314 | } |
315 | } | |
316 | } | |
317 | // | |
318 | // SIDE A ************************************************** | |
319 | else{ | |
9251fceb | 320 | if(TMath::Abs(x[2]-kBComp1CZ)<kBComp1hDZ && rad2 < kBComp1SqR) { |
db83d72f | 321 | // Compensator magnet at z = 1075 m |
9251fceb | 322 | b[0] = fACorr1Field*fFactorDip; |
db83d72f | 323 | } |
324 | // | |
9251fceb | 325 | if(TMath::Abs(x[2]-kBComp2CZ)<kBComp2hDZ && rad2 < kBComp2SqR){ |
326 | b[0] = fACorr2Field*fFactorDip; | |
327 | } | |
328 | else if(TMath::Abs(x[2]-kTripQ1CZ)<kTripQ1hDZ && rad2 < kTripQ1SqR){ | |
db83d72f | 329 | b[0] = -fQuadGradient*x[1]; |
330 | b[1] = -fQuadGradient*x[0]; | |
eed8a1a2 | 331 | } |
9251fceb | 332 | else if(TMath::Abs(x[2]-kTripQ2CZ)<kTripQ2hDZ && rad2 < kTripQ2SqR){ |
333 | b[0] = fQuadGradient*x[1]; | |
334 | b[1] = fQuadGradient*x[0]; | |
eed8a1a2 | 335 | } |
9251fceb | 336 | else if(TMath::Abs(x[2]-kTripQ3CZ)<kTripQ3hDZ && rad2 < kTripQ3SqR){ |
337 | b[0] = fQuadGradient*x[1]; | |
338 | b[1] = fQuadGradient*x[0]; | |
db83d72f | 339 | } |
9251fceb | 340 | else if(TMath::Abs(x[2]-kTripQ4CZ)<kTripQ4hDZ && rad2 < kTripQ4SqR){ |
db83d72f | 341 | b[0] = -fQuadGradient*x[1]; |
342 | b[1] = -fQuadGradient*x[0]; | |
db83d72f | 343 | } |
9251fceb | 344 | else if(TMath::Abs(x[2]-kDip1CZ)<kDip1hDZ && rad2 < kDip1SqRA){ |
db83d72f | 345 | b[1] = -fDipoleField; |
db83d72f | 346 | } |
9251fceb | 347 | else if(TMath::Abs(x[2]-kDip2CZ)<kDip2hDZ && rad2 < kDip2SqRA) { |
348 | double dxabs = TMath::Abs(x[0])-kDip2DXA; | |
349 | if ( (dxabs*dxabs + x[1]*x[1])<kDip2SqRA) { | |
db83d72f | 350 | b[1] = fDipoleField; |
351 | } | |
352 | } | |
353 | } | |
9251fceb | 354 | // |
db83d72f | 355 | } |
356 | ||
357 | //_______________________________________________________________________ | |
358 | void AliMagF::GetTPCInt(const Double_t *xyz, Double_t *b) const | |
359 | { | |
360 | // Method to calculate the integral of magnetic integral from xyz to nearest cathode plane | |
361 | b[0]=b[1]=b[2]=0.0; | |
362 | if (fMeasuredMap) { | |
363 | fMeasuredMap->GetTPCInt(xyz,b); | |
364 | for (int i=3;i--;) b[i] *= fFactorSol; | |
365 | } | |
366 | } | |
367 | ||
368 | //_______________________________________________________________________ | |
369 | void AliMagF::GetTPCIntCyl(const Double_t *rphiz, Double_t *b) const | |
370 | { | |
371 | // Method to calculate the integral of magnetic integral from point to nearest cathode plane | |
372 | // in cylindrical coordiates ( -pi<phi<pi convention ) | |
373 | b[0]=b[1]=b[2]=0.0; | |
374 | if (fMeasuredMap) { | |
375 | fMeasuredMap->GetTPCIntCyl(rphiz,b); | |
376 | for (int i=3;i--;) b[i] *= fFactorSol; | |
377 | } | |
eed8a1a2 | 378 | } |
1dd3d90e | 379 | |
380 | //_______________________________________________________________________ | |
381 | void AliMagF::SetFactorSol(Float_t fc) | |
382 | { | |
383 | // set the sign/scale of the current in the L3 according to fgkPolarityConvention | |
384 | switch (fgkPolarityConvention) { | |
385 | case kConvDCS2008: fFactorSol = -fc; break; | |
386 | case kConvLHC : fFactorSol = -fc; break; | |
387 | default : fFactorSol = fc; break; // case kConvMap2005: fFactorSol = fc; break; | |
388 | } | |
389 | } | |
390 | ||
391 | //_______________________________________________________________________ | |
392 | void AliMagF::SetFactorDip(Float_t fc) | |
393 | { | |
394 | // set the sign*scale of the current in the Dipole according to fgkPolarityConvention | |
395 | switch (fgkPolarityConvention) { | |
396 | case kConvDCS2008: fFactorDip = fc; break; | |
397 | case kConvLHC : fFactorDip = -fc; break; | |
398 | default : fFactorDip = fc; break; // case kConvMap2005: fFactorDip = fc; break; | |
399 | } | |
400 | } | |
401 | ||
402 | //_______________________________________________________________________ | |
403 | Double_t AliMagF::GetFactorSol() const | |
404 | { | |
405 | // return the sign*scale of the current in the Dipole according to fgkPolarityConventionthe | |
406 | switch (fgkPolarityConvention) { | |
407 | case kConvDCS2008: return -fFactorSol; | |
408 | case kConvLHC : return -fFactorSol; | |
409 | default : return fFactorSol; // case kConvMap2005: return fFactorSol; | |
410 | } | |
411 | } | |
412 | ||
413 | //_______________________________________________________________________ | |
414 | Double_t AliMagF::GetFactorDip() const | |
415 | { | |
416 | // return the sign*scale of the current in the Dipole according to fgkPolarityConventionthe | |
417 | switch (fgkPolarityConvention) { | |
418 | case kConvDCS2008: return fFactorDip; | |
419 | case kConvLHC : return -fFactorDip; | |
420 | default : return fFactorDip; // case kConvMap2005: return fFactorDip; | |
421 | } | |
422 | } | |
33fe5eb1 | 423 | |
424 | //_____________________________________________________________________________ | |
425 | AliMagF* AliMagF::CreateFieldMap(Float_t l3Cur, Float_t diCur, Int_t convention, Bool_t uniform, | |
5cf76849 | 426 | Float_t beamenergy, const Char_t *beamtype, const Char_t *path) |
33fe5eb1 | 427 | { |
428 | //------------------------------------------------ | |
429 | // The magnetic field map, defined externally... | |
430 | // L3 current 30000 A -> 0.5 T | |
431 | // L3 current 12000 A -> 0.2 T | |
432 | // dipole current 6000 A | |
433 | // The polarities must match the convention (LHC or DCS2008) | |
434 | // unless the special uniform map was used for MC | |
435 | //------------------------------------------------ | |
436 | const Float_t l3NominalCurrent1=30000.; // (A) | |
437 | const Float_t l3NominalCurrent2=12000.; // (A) | |
438 | const Float_t diNominalCurrent =6000. ; // (A) | |
439 | ||
440 | const Float_t tolerance=0.03; // relative current tolerance | |
441 | const Float_t zero=77.; // "zero" current (A) | |
442 | // | |
443 | BMap_t map; | |
444 | double sclL3,sclDip; | |
445 | // | |
446 | Float_t l3Pol = l3Cur > 0 ? 1:-1; | |
447 | Float_t diPol = diCur > 0 ? 1:-1; | |
448 | ||
449 | l3Cur = TMath::Abs(l3Cur); | |
450 | diCur = TMath::Abs(diCur); | |
451 | // | |
452 | if (TMath::Abs((sclDip=diCur/diNominalCurrent)-1.) > tolerance && !uniform) { | |
453 | if (diCur <= zero) sclDip = 0.; // some small current.. -> Dipole OFF | |
454 | else { | |
455 | AliErrorGeneral("AliMagF",Form("Wrong dipole current (%f A)!",diCur)); | |
456 | return 0; | |
457 | } | |
458 | } | |
459 | // | |
460 | if (uniform) { | |
461 | // special treatment of special MC with uniform mag field (normalized to 0.5 T) | |
462 | // no check for scaling/polarities are done | |
463 | map = k5kGUniform; | |
464 | sclL3 = l3Cur/l3NominalCurrent1; | |
465 | } | |
466 | else { | |
467 | if (TMath::Abs((sclL3=l3Cur/l3NominalCurrent1)-1.) < tolerance) map = k5kG; | |
468 | else if (TMath::Abs((sclL3=l3Cur/l3NominalCurrent2)-1.) < tolerance) map = k2kG; | |
e0418f7d | 469 | else if (l3Cur <= zero && diCur<=zero) { sclL3=0; sclDip=0; map = k5kGUniform;} |
33fe5eb1 | 470 | else { |
471 | AliErrorGeneral("AliMagF",Form("Wrong L3 current (%f A)!",l3Cur)); | |
472 | return 0; | |
473 | } | |
474 | } | |
475 | // | |
17c30c5b | 476 | if (sclDip!=0 && map!=k5kGUniform) { |
477 | if ( (l3Cur<=zero) || ((convention==kConvLHC && l3Pol!=diPol) || (convention==kConvDCS2008 && l3Pol==diPol)) ) { | |
478 | AliErrorGeneral("AliMagF",Form("Wrong combination for L3/Dipole polarities (%c/%c) for convention %d", | |
479 | l3Pol>0?'+':'-',diPol>0?'+':'-',GetPolarityConvention())); | |
480 | return 0; | |
481 | } | |
33fe5eb1 | 482 | } |
483 | // | |
484 | if (l3Pol<0) sclL3 = -sclL3; | |
485 | if (diPol<0) sclDip = -sclDip; | |
486 | // | |
487 | BeamType_t btype = kNoBeamField; | |
488 | TString btypestr = beamtype; | |
489 | btypestr.ToLower(); | |
490 | TPRegexp protonBeam("(proton|p)\\s*-?\\s*\\1"); | |
491 | TPRegexp ionBeam("(lead|pb|ion|a)\\s*-?\\s*\\1"); | |
492 | if (btypestr.Contains(ionBeam)) btype = kBeamTypeAA; | |
493 | else if (btypestr.Contains(protonBeam)) btype = kBeamTypepp; | |
494 | else AliInfoGeneral("AliMagF",Form("Assume no LHC magnet field for the beam type %s, ",beamtype)); | |
495 | char ttl[80]; | |
496 | sprintf(ttl,"L3: %+5d Dip: %+4d kA; %s | Polarities in %s convention",(int)TMath::Sign(l3Cur,float(sclL3)), | |
497 | (int)TMath::Sign(diCur,float(sclDip)),uniform ? " Constant":"", | |
498 | convention==kConvLHC ? "LHC":"DCS2008"); | |
499 | // LHC and DCS08 conventions have opposite dipole polarities | |
500 | if ( GetPolarityConvention() != convention) sclDip = -sclDip; | |
501 | // | |
5cf76849 | 502 | return new AliMagF("MagneticFieldMap", ttl,sclL3,sclDip,map,btype,beamenergy,2,10.,path); |
33fe5eb1 | 503 | // |
504 | } | |
505 | ||
506 | //_____________________________________________________________________________ | |
507 | const char* AliMagF::GetBeamTypeText() const | |
508 | { | |
509 | const char *beamNA = "No Beam"; | |
510 | const char *beamPP = "p-p"; | |
511 | const char *beamPbPb= "Pb-Pb"; | |
512 | switch ( fBeamType ) { | |
513 | case kBeamTypepp : return beamPP; | |
514 | case kBeamTypeAA : return beamPbPb; | |
515 | case kNoBeamField: | |
516 | default: return beamNA; | |
517 | } | |
518 | } | |
519 |