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faf93237 | 1 | #include "AliTPCExB.h" |
2abfc1e6 | 2 | #include "TMath.h" |
3 | #include "TTreeStream.h" | |
9170bb1b | 4 | #include "AliMagF.h" |
5 | #include "TLinearFitter.h" | |
3ac615eb | 6 | #include "AliTPCcalibDB.h" |
2abfc1e6 | 7 | |
8 | ||
9 | // | |
10 | // Abstract class for ExB effect parameterization | |
11 | // | |
12 | // | |
13 | // | |
14 | // The ExB correction map is stored in the calib DB | |
15 | // The lookup can be dumped to the tree: | |
16 | /* | |
17 | ||
18 | // | |
19 | char *storage = "local://OCDBres" | |
20 | Int_t RunNumber=0; | |
21 | AliCDBManager::Instance()->SetDefaultStorage(storage); | |
22 | AliCDBManager::Instance()->SetRun(RunNumber) | |
23 | AliTPCExBFirst * exb = AliTPCcalibDB::Instance()->GetExB(); | |
24 | // | |
25 | // See example macro $ALICE_ROOT/TPC/macros/AliTPCExBdraw.C | |
26 | // | |
27 | .L $ALICE_ROOT/TPC/macros/AliTPCExBdraw.C | |
74e16bc1 | 28 | Draw(0) |
2abfc1e6 | 29 | |
30 | ||
31 | ||
32 | ||
33 | */ | |
34 | ||
35 | AliTPCExB* AliTPCExB::fgInstance = 0; | |
faf93237 | 36 | |
9170bb1b | 37 | TObjArray AliTPCExB::fgArray; |
38 | ||
39 | ||
40 | ||
faf93237 | 41 | ClassImp(AliTPCExB) |
42 | ||
9170bb1b | 43 | AliTPCExB::AliTPCExB(): |
44 | TObject(), | |
45 | fMatBrBz(0), //param matrix Br/Bz | |
46 | fMatBrfiBz(0), //param matrix Br/Bz | |
47 | fMatBrBzI0(0), //param matrix Br/Bz integral z>0 | |
48 | fMatBrBzI1(0), //param matrix Br/Bz integral z<0 | |
49 | fMatBrfiBzI0(0), //param matrix Br/Bz integral z>0 | |
50 | fMatBrfiBzI1(0) //param matrix Br/Bz integral z<0 | |
51 | { | |
52 | // | |
53 | // default constructor | |
54 | // | |
55 | } | |
56 | ||
2abfc1e6 | 57 | |
58 | void AliTPCExB::TestExB(const char* fileName) { | |
59 | // | |
9170bb1b | 60 | // Test ExB - |
61 | // Dump the filed and corrections to the tree in file fileName | |
2abfc1e6 | 62 | // |
9170bb1b | 63 | // |
2abfc1e6 | 64 | TTreeSRedirector ts(fileName); |
65 | Double_t x[3]; | |
66 | for (x[0]=-250.;x[0]<=250.;x[0]+=10.) | |
67 | for (x[1]=-250.;x[1]<=250.;x[1]+=10.) | |
9170bb1b | 68 | for (x[2]=-250.;x[2]<=250.;x[2]+=20.) { |
69 | Double_t r=TMath::Sqrt(x[0]*x[0]+x[1]*x[1]); | |
70 | if (r<20) continue; | |
71 | if (r>260) continue; | |
72 | Double_t z = x[2]; | |
2abfc1e6 | 73 | Double_t d[3]; |
74 | Correct(x,d); | |
2abfc1e6 | 75 | Double_t rd=TMath::Sqrt(d[0]*d[0]+d[1]*d[1]); |
76 | Double_t dr=r-rd; | |
9170bb1b | 77 | Double_t phi=TMath::ATan2(x[1],x[0]); |
78 | Double_t phid=TMath::ATan2(d[1],d[0]); | |
2abfc1e6 | 79 | Double_t dphi=phi-phid; |
80 | if (dphi<0.) dphi+=TMath::TwoPi(); | |
81 | if (dphi>TMath::Pi()) dphi=TMath::TwoPi()-dphi; | |
82 | Double_t drphi=r*dphi; | |
83 | Double_t dx=x[0]-d[0]; | |
84 | Double_t dy=x[1]-d[1]; | |
85 | Double_t dz=x[2]-d[2]; | |
9170bb1b | 86 | // |
87 | Double_t bx = GetBx(r,phi,z,0); | |
88 | Double_t by = GetBy(r,phi,z,0); | |
89 | Double_t bz = GetBz(r,phi,z,0); | |
90 | Double_t br = GetBr(r,phi,z,0); | |
91 | Double_t brfi = GetBrfi(r,phi,z,0); | |
92 | // | |
93 | Double_t bxi = GetBxI(r,phi,z,0); | |
94 | Double_t byi = GetByI(r,phi,z,0); | |
95 | Double_t bzi = GetBzI(r,phi,z,0); | |
96 | Double_t bri = GetBrI(r,phi,z,0); | |
97 | Double_t brfii = GetBrfiI(r,phi,z,0); | |
98 | ||
99 | ts<<"positions"<< | |
100 | "x0="<<x[0]<< | |
101 | "x1="<<x[1]<< | |
102 | "x2="<<x[2]<< | |
103 | "dx="<<dx<< | |
104 | "dy="<<dy<< | |
105 | "dz="<<dz<< | |
106 | "r="<<r<< | |
107 | "phi="<<phi<< | |
108 | "dr="<<dr<< | |
109 | "drphi="<<drphi<< | |
110 | // | |
111 | // B-Field | |
112 | // | |
113 | "bx="<<bx<< | |
114 | "by="<<by<< | |
115 | "bz="<<bz<< | |
116 | "br="<< br<< | |
117 | "brfi="<<brfi<< | |
118 | // B-field integ | |
119 | "bxi="<<bxi<< | |
120 | "byi="<<byi<< | |
121 | "bzi="<<bzi<< | |
122 | "bri="<< bri<< | |
123 | "brfii="<<brfii<< | |
124 | "\n"; | |
2abfc1e6 | 125 | } |
126 | } | |
127 | ||
128 | ||
129 | ||
3ac615eb | 130 | Double_t AliTPCExB::GetDr(Double_t r, Double_t phi, Double_t z, Double_t bz){ |
2abfc1e6 | 131 | // |
132 | // Static function | |
133 | // Posibble to us it for visualization | |
134 | // | |
135 | // | |
3ac615eb | 136 | AliTPCExB *exb = AliTPCcalibDB::GetExB(bz,kFALSE); |
137 | if (!exb) return 0; | |
7cc2f55b | 138 | Double_t pos0[3] = {r*TMath::Cos(phi), r*TMath::Sin(phi),z}; |
2abfc1e6 | 139 | Double_t pos1[3]; |
3ac615eb | 140 | exb->Correct(pos0,pos1); |
2abfc1e6 | 141 | Double_t dx=pos1[0]-pos0[0]; |
142 | Double_t dy=pos1[1]-pos0[1]; | |
143 | // Double_t dz=pos1[2]-pos0[2]; | |
3ac615eb | 144 | // return TMath::Sqrt(dx*dx+dy*dy); |
145 | Float_t dr = (dx*pos0[0]+dy*pos0[1])/r; | |
146 | return dr; | |
2abfc1e6 | 147 | } |
148 | ||
149 | ||
3ac615eb | 150 | Double_t AliTPCExB::GetDrphi(Double_t r, Double_t phi, Double_t z, Double_t bz){ |
2abfc1e6 | 151 | // |
152 | // | |
153 | // | |
3ac615eb | 154 | AliTPCExB *exb = AliTPCcalibDB::GetExB(bz,kFALSE); |
155 | if (!exb) return 0; | |
7cc2f55b | 156 | Double_t pos0[3] = {r*TMath::Cos(phi), r*TMath::Sin(phi),z}; |
2abfc1e6 | 157 | Double_t pos1[3]; |
3ac615eb | 158 | exb->Correct(pos0,pos1); |
2abfc1e6 | 159 | Double_t dphi=TMath::ATan2(pos1[1],pos1[0])-TMath::ATan2(pos0[1],pos0[0]); |
160 | return r*dphi; | |
161 | ||
162 | } | |
163 | ||
164 | ||
3ac615eb | 165 | Double_t AliTPCExB::GetDphi(Double_t r, Double_t phi, Double_t z, Double_t bz){ |
2abfc1e6 | 166 | // |
167 | // | |
3ac615eb | 168 | // |
169 | AliTPCExB *exb = AliTPCcalibDB::GetExB(bz,kFALSE); | |
170 | if (!exb) return 0; | |
7cc2f55b | 171 | Double_t pos0[3] = {r*TMath::Cos(phi), r*TMath::Sin(phi),z}; |
2abfc1e6 | 172 | Double_t pos1[3]; |
3ac615eb | 173 | exb->Correct(pos0,pos1); |
2abfc1e6 | 174 | Double_t dphi=TMath::ATan2(pos1[1],pos1[0])-TMath::ATan2(pos0[1],pos0[0]); |
175 | return dphi; | |
176 | ||
177 | } | |
178 | ||
3ac615eb | 179 | Double_t AliTPCExB::GetDz(Double_t r, Double_t phi, Double_t z, Double_t bz){ |
2abfc1e6 | 180 | // |
181 | // | |
182 | // | |
3ac615eb | 183 | AliTPCExB *exb = AliTPCcalibDB::GetExB(bz,kFALSE); |
184 | if (!exb) return 0; | |
7cc2f55b | 185 | Double_t pos0[3] = {r*TMath::Cos(phi), r*TMath::Sin(phi),z}; |
2abfc1e6 | 186 | Double_t pos1[3]; |
3ac615eb | 187 | exb->Correct(pos0,pos1); |
2abfc1e6 | 188 | Double_t dz=pos1[2]-pos0[2]; |
189 | return dz; | |
190 | } | |
9170bb1b | 191 | |
192 | // | |
193 | // Magnetic field | |
194 | // | |
195 | ||
196 | ||
197 | ||
198 | ||
199 | void AliTPCExB::RegisterField(Int_t index, AliMagF * magf){ | |
200 | // | |
201 | // add the filed to the list | |
202 | // | |
203 | fgArray.AddAt(magf,index); | |
204 | } | |
205 | ||
206 | ||
207 | ||
208 | Double_t AliTPCExB::GetBx(Double_t r, Double_t phi, Double_t z,Int_t index){ | |
209 | // | |
210 | // | |
211 | // | |
212 | AliMagF *mag = (AliMagF*)fgArray.At(index); | |
213 | if (!mag) return 0; | |
214 | Float_t xyz[3]={r*TMath::Cos(phi),r*TMath::Sin(phi),z}; | |
215 | // xyz[1]+=30; | |
216 | Float_t bxyz[3]; | |
217 | mag->Field(xyz,bxyz); | |
218 | return bxyz[0]; | |
219 | } | |
220 | ||
221 | Double_t AliTPCExB::GetBy(Double_t r, Double_t phi, Double_t z,Int_t index){ | |
222 | // | |
223 | // | |
224 | // | |
225 | AliMagF *mag = (AliMagF*)fgArray.At(index); | |
226 | if (!mag) return 0; | |
227 | Float_t xyz[3]={r*TMath::Cos(phi),r*TMath::Sin(phi),z}; | |
228 | // xyz[1]+=30; | |
229 | Float_t bxyz[3]; | |
230 | mag->Field(xyz,bxyz); | |
231 | return bxyz[1]; | |
232 | } | |
233 | ||
234 | Double_t AliTPCExB::GetBz(Double_t r, Double_t phi, Double_t z,Int_t index){ | |
235 | // | |
236 | // | |
237 | // | |
238 | AliMagF *mag = (AliMagF*)fgArray.At(index); | |
239 | if (!mag) return 0; | |
240 | Float_t xyz[3]={r*TMath::Cos(phi),r*TMath::Sin(phi),z}; | |
241 | // xyz[1]+=30; | |
242 | Float_t bxyz[3]; | |
243 | mag->Field(xyz,bxyz); | |
244 | return bxyz[2]; | |
245 | } | |
246 | ||
247 | ||
248 | ||
249 | Double_t AliTPCExB::GetBr(Double_t r, Double_t phi, Double_t z,Int_t index){ | |
250 | // | |
251 | // | |
252 | // | |
253 | AliMagF *mag = (AliMagF*)fgArray.At(index); | |
254 | if (!mag) return 0; | |
255 | Float_t xyz[3]={r*TMath::Cos(phi),r*TMath::Sin(phi),z}; | |
256 | //xyz[1]+=30; | |
257 | Float_t bxyz[3]; | |
258 | mag->Field(xyz,bxyz); | |
259 | if (r==0) return 0; | |
260 | Float_t br = (bxyz[0]*xyz[0]+bxyz[1]*xyz[1])/r; | |
261 | return br; | |
262 | } | |
263 | ||
264 | Double_t AliTPCExB::GetBrfi(Double_t r, Double_t phi, Double_t z,Int_t index){ | |
265 | // | |
266 | // | |
267 | // | |
268 | AliMagF *mag = (AliMagF*)fgArray.At(index); | |
269 | if (!mag) return 0; | |
270 | Float_t xyz[3]={r*TMath::Cos(phi),r*TMath::Sin(phi),z}; | |
271 | //xyz[1]+=30; | |
272 | Float_t bxyz[3]; | |
273 | mag->Field(xyz,bxyz); | |
274 | if (r==0) return 0; | |
275 | Float_t br = (-bxyz[0]*xyz[1]+bxyz[1]*xyz[0])/r; | |
276 | return br; | |
277 | } | |
278 | ||
279 | ||
280 | ||
281 | ||
282 | Double_t AliTPCExB::GetBxI(Double_t r, Double_t phi, Double_t z,Int_t index) | |
283 | { | |
284 | Double_t sumf =0; | |
285 | if (z>0 &&z<250){ | |
286 | for (Float_t zi=z;zi<250;zi+=5){ | |
287 | sumf+=GetBx(r,phi,zi,index)/GetBz(r,phi,zi,index); | |
288 | } | |
289 | } | |
290 | if (z<0 &&z>-250){ | |
291 | for (Float_t zi=z;zi>-250;zi-=5){ | |
292 | sumf+=GetBx(r,phi,zi,index)/GetBz(r,phi,zi,index); | |
293 | } | |
294 | } | |
295 | return sumf*5; | |
296 | } | |
297 | ||
298 | Double_t AliTPCExB::GetByI(Double_t r, Double_t phi, Double_t z,Int_t index) | |
299 | { | |
300 | Double_t sumf =0; | |
301 | if (z>0 &&z<250){ | |
302 | for (Float_t zi=z;zi<250;zi+=5){ | |
303 | sumf+=GetBy(r,phi,zi,index)/GetBz(r,phi,zi,index); | |
304 | } | |
305 | } | |
306 | if (z<0 &&z>-250){ | |
307 | for (Float_t zi=z;zi>-250;zi-=5){ | |
308 | sumf+=GetBy(r,phi,zi,index)/GetBz(r,phi,zi,index); | |
309 | } | |
310 | } | |
311 | return sumf*5; | |
312 | } | |
313 | ||
314 | Double_t AliTPCExB::GetBzI(Double_t r, Double_t phi, Double_t z,Int_t index) | |
315 | { | |
316 | Double_t sumf =0; | |
317 | if (z>0 &&z<250){ | |
318 | for (Float_t zi=z;zi<250;zi+=5){ | |
319 | sumf+=GetBz(r,phi,zi,index); | |
320 | } | |
321 | } | |
322 | if (z<0 &&z>-250){ | |
323 | for (Float_t zi=z;zi>-250;zi-=5){ | |
324 | sumf+=GetBz(r,phi,zi,index); | |
325 | } | |
326 | } | |
327 | return sumf*5; | |
328 | } | |
329 | ||
330 | ||
331 | Double_t AliTPCExB::GetBrI(Double_t r, Double_t phi, Double_t z,Int_t index) | |
332 | { | |
333 | Double_t sumf =0; | |
334 | if (z>0 &&z<250){ | |
335 | for (Float_t zi=z;zi<250;zi+=5){ | |
336 | sumf+=GetBr(r,phi,zi,index)/GetBz(r,phi,zi,index); | |
337 | } | |
338 | } | |
339 | if (z<0 &&z>-250){ | |
340 | for (Float_t zi=z;zi>-250;zi-=5){ | |
341 | sumf+=GetBr(r,phi,zi,index)/GetBz(r,phi,zi,index); | |
342 | } | |
343 | } | |
344 | return sumf*5; | |
345 | } | |
346 | ||
347 | Double_t AliTPCExB::GetBrfiI(Double_t r, Double_t phi, Double_t z,Int_t index) | |
348 | { | |
349 | Double_t sumf =0; | |
350 | if (z>0 &&z<250){ | |
351 | for (Float_t zi=z;zi<250;zi+=5.){ | |
352 | sumf+=GetBrfi(r,phi,zi,index)/GetBz(r,phi,zi,index); | |
353 | } | |
354 | } | |
355 | if (z<0 &&z>-250){ | |
356 | for (Float_t zi=z;zi>-250;zi-=5){ | |
357 | sumf+=GetBrfi(r,phi,zi,index)/GetBz(r,phi,zi,index); | |
358 | } | |
359 | } | |
360 | return sumf*5; | |
361 | } | |
362 | ||
363 | ||
364 | Double_t AliTPCExB::Eval(Int_t type, Double_t r, Double_t phi, Double_t z){ | |
365 | // | |
366 | // Evaluate parameterization | |
367 | // | |
368 | // br integral param | |
369 | if (type==0) { | |
370 | if (z>0 && fMatBrBzI0) return EvalMat(*fMatBrBzI0,r,phi,z); | |
371 | if (z<0 && fMatBrBzI1) return EvalMat(*fMatBrBzI1,r,phi,z); | |
372 | } | |
373 | // brfi integral param | |
374 | if (type==1) { | |
375 | if (z>0 && fMatBrfiBzI0) return EvalMat(*fMatBrfiBzI0,r,phi,z); | |
376 | if (z<0 && fMatBrfiBzI1) return EvalMat(*fMatBrfiBzI1,r,phi,z); | |
377 | } | |
378 | // brbz param | |
379 | if (type==2 && fMatBrBz) return EvalMat(*fMatBrBz,r,phi,z); | |
380 | // brfibz param | |
381 | if (type==3 && fMatBrfiBz) return EvalMat(*fMatBrfiBz,r,phi,z); | |
382 | return 0; | |
383 | } | |
384 | ||
385 | ||
386 | Double_t AliTPCExB::EvalMat(TVectorD &vec, Double_t r, Double_t phi, Double_t z){ | |
387 | // | |
388 | // Evaluate taylor expansion in r,phi,z | |
389 | // | |
390 | // Variables | |
391 | //tree->SetAlias("sa","sin(phi+0.0)"); | |
392 | //tree->SetAlias("ca","cos(phi+0.0)"); | |
393 | //tree->SetAlias("sa2","sin(phi*2+0.0)"); | |
394 | //tree->SetAlias("ca2","cos(phi*2+0.0)"); | |
395 | //tree->SetAlias("zn","(x2/250.)"); | |
396 | //tree->SetAlias("rn","(r/250.)") | |
397 | // TString fstringSym=""; | |
398 | // // | |
399 | // fstringSym+="zn++"; | |
400 | // fstringSym+="rn++"; | |
401 | // fstringSym+="zn*rn++"; | |
402 | // fstringSym+="zn*zn++"; | |
403 | // fstringSym+="zn*zn*rn++"; | |
404 | // fstringSym+="zn*rn*rn++"; | |
405 | // // | |
406 | // fstringSym+="sa++"; | |
407 | // fstringSym+="ca++"; | |
408 | // fstringSym+="ca2++"; | |
409 | // fstringSym+="sa2++"; | |
410 | // fstringSym+="ca*zn++"; | |
411 | // fstringSym+="sa*zn++"; | |
412 | // fstringSym+="ca2*zn++"; | |
413 | // fstringSym+="sa2*zn++"; | |
414 | // fstringSym+="ca*zn*zn++"; | |
415 | // fstringSym+="sa*zn*zn++"; | |
416 | // fstringSym+="ca*zn*rn++"; | |
417 | // fstringSym+="sa*zn*rn++"; | |
418 | ||
419 | ||
420 | Double_t sa = TMath::Sin(phi); | |
421 | Double_t ca = TMath::Cos(phi); | |
422 | Double_t sa2 = TMath::Sin(phi*2); | |
423 | Double_t ca2 = TMath::Cos(phi*2); | |
424 | Double_t zn = z/250.; | |
425 | Double_t rn = r/250.; | |
426 | Int_t ipoint=0; | |
427 | Double_t res = vec[ipoint++]; | |
428 | res+=vec[ipoint++]*zn; | |
429 | res+=vec[ipoint++]*rn; | |
430 | res+=vec[ipoint++]*zn*rn; | |
431 | res+=vec[ipoint++]*zn*zn; | |
432 | res+=vec[ipoint++]*zn*zn*rn; | |
433 | res+=vec[ipoint++]*zn*rn*rn; | |
434 | // | |
435 | res+=vec[ipoint++]*sa; | |
436 | res+=vec[ipoint++]*ca; | |
437 | res+=vec[ipoint++]*ca2; | |
438 | res+=vec[ipoint++]*sa2; | |
439 | res+=vec[ipoint++]*ca*zn; | |
440 | res+=vec[ipoint++]*sa*zn; | |
441 | res+=vec[ipoint++]*ca2*zn; | |
442 | res+=vec[ipoint++]*sa2*zn; | |
443 | res+=vec[ipoint++]*ca*zn*zn; | |
444 | res+=vec[ipoint++]*sa*zn*zn; | |
445 | res+=vec[ipoint++]*ca*zn*rn; | |
446 | res+=vec[ipoint++]*sa*zn*rn; | |
447 | return res; | |
448 | } | |
449 | ||
450 | ||
451 | ||
452 | ||
453 | ||
454 | ||
455 | ||
456 | ||
457 | ||
458 | ||
459 | ||
460 | ||
461 | ||
462 | ||
463 | /* | |
464 | ||
465 | AliTPCExB draw; | |
466 | draw.RegisterField(0,new AliMagWrapCheb("Maps","Maps", 2, 1., 10., AliMagWrapCheb::k5kG)); | |
467 | draw.RegisterField(1,new AliMagFMaps("Maps","Maps", 2, 1., 10., 2)); | |
468 | ||
469 | TF2 fbz_rz_0pi("fbz_rz_0pi","AliTPCExB::GetBz(x,0*pi,y)",0,250,-250,250); | |
470 | fbz_rz_0pi->Draw("surf2"); | |
471 | ||
472 | TF1 fbz_z_90_00pi("fbz_z_90_00pi","AliTPCExB::GetBz(90,0*pi,x)",-250,250); | |
473 | TF1 fbz_z_90_05pi("fbz_z_90_05pi","AliTPCExB::GetBz(90,0.5*pi,x)",-250,250); | |
474 | TF1 fbz_z_90_10pi("fbz_z_90_10pi","AliTPCExB::GetBz(90,1.0*pi,x)",-250,250); | |
475 | TF1 fbz_z_90_15pi("fbz_z_90_15pi","AliTPCExB::GetBz(90,1.5*pi,x)",-250,250); | |
476 | fbz_z_90_00pi->SetLineColor(2); | |
477 | fbz_z_90_05pi->SetLineColor(3); | |
478 | fbz_z_90_10pi->SetLineColor(4); | |
479 | fbz_z_90_15pi->SetLineColor(5); | |
480 | fbz_z_90_00pi->Draw() | |
481 | fbz_z_90_05pi->Draw("same") | |
482 | fbz_z_90_15pi->Draw("same") | |
483 | fbz_z_90_10pi->Draw("same") | |
484 | ||
485 | ||
486 | TF1 fbr_z_90_00pi("fbz_z_90_00pi","AliTPCExB::GetBr(90,0*pi,x)",-250,250); | |
487 | TF1 fbr_z_90_05pi("fbz_z_90_05pi","AliTPCExB::GetBr(90,0.5*pi,x)",-250,250); | |
488 | TF1 fbr_z_90_10pi("fbz_z_90_10pi","AliTPCExB::GetBr(90,1.0*pi,x)",-250,250); | |
489 | TF1 fbr_z_90_15pi("fbz_z_90_15pi","AliTPCExB::GetBr(90,1.5*pi,x)",-250,250); | |
490 | fbr_z_90_00pi->SetLineColor(2); | |
491 | fbr_z_90_05pi->SetLineColor(3); | |
492 | fbr_z_90_10pi->SetLineColor(4); | |
493 | fbr_z_90_15pi->SetLineColor(5); | |
494 | fbr_z_90_00pi->Draw() | |
495 | fbr_z_90_05pi->Draw("same") | |
496 | fbr_z_90_15pi->Draw("same") | |
497 | fbr_z_90_10pi->Draw("same") | |
498 | ||
499 | // | |
500 | TF2 fbz_xy_0z("fbz_xy_0z","AliTPCExB::GetBz(sqrt(x^2+y^2),atan2(y,x),0)",-250,250,-250,250); | |
501 | fbz_xy_0z.SetNpy(100); | |
502 | fbz_xy_0z.SetNpx(100); | |
503 | fbz_xy_0z->Draw("colz"); | |
504 | // | |
505 | TF2 fbz_xy_250z("fbz_xy_250z","AliTPCExB::GetBz(sqrt(x^2+y^2),atan2(y,x),250)",-250,250,-250,250); | |
506 | fbz_xy_250z.SetNpy(100); | |
507 | fbz_xy_250z.SetNpx(100) | |
508 | fbz_xy_250z->Draw("colz"); | |
509 | // | |
510 | TF2 fbz_xy_m250z("fbz_xy_m250z","AliTPCExB::GetBz(sqrt(x^2+y^2),atan2(y,x),-250)",-250,250,-250,250); | |
511 | fbz_xy_m250z.SetNpy(100); | |
512 | fbz_xy_m250z.SetNpx(100) | |
513 | fbz_xy_m250z->Draw("colz"); | |
514 | // | |
515 | ||
516 | ||
517 | ||
518 | ||
519 | ||
520 | */ | |
521 | ||
522 |