3 #include "TTreeStream.h"
5 #include "TLinearFitter.h"
9 // Abstract class for ExB effect parameterization
13 // The ExB correction map is stored in the calib DB
14 // The lookup can be dumped to the tree:
18 char *storage = "local://OCDBres"
20 AliCDBManager::Instance()->SetDefaultStorage(storage);
21 AliCDBManager::Instance()->SetRun(RunNumber)
22 AliTPCExBFirst * exb = AliTPCcalibDB::Instance()->GetExB();
24 // See example macro $ALICE_ROOT/TPC/macros/AliTPCExBdraw.C
26 .L $ALICE_ROOT/TPC/macros/AliTPCExBdraw.C
34 AliTPCExB* AliTPCExB::fgInstance = 0;
36 TObjArray AliTPCExB::fgArray;
42 AliTPCExB::AliTPCExB():
44 fMatBrBz(0), //param matrix Br/Bz
45 fMatBrfiBz(0), //param matrix Br/Bz
46 fMatBrBzI0(0), //param matrix Br/Bz integral z>0
47 fMatBrBzI1(0), //param matrix Br/Bz integral z<0
48 fMatBrfiBzI0(0), //param matrix Br/Bz integral z>0
49 fMatBrfiBzI1(0) //param matrix Br/Bz integral z<0
52 // default constructor
57 void AliTPCExB::TestExB(const char* fileName) {
60 // Dump the filed and corrections to the tree in file fileName
63 TTreeSRedirector ts(fileName);
65 for (x[0]=-250.;x[0]<=250.;x[0]+=10.)
66 for (x[1]=-250.;x[1]<=250.;x[1]+=10.)
67 for (x[2]=-250.;x[2]<=250.;x[2]+=20.) {
68 Double_t r=TMath::Sqrt(x[0]*x[0]+x[1]*x[1]);
74 Double_t rd=TMath::Sqrt(d[0]*d[0]+d[1]*d[1]);
76 Double_t phi=TMath::ATan2(x[1],x[0]);
77 Double_t phid=TMath::ATan2(d[1],d[0]);
78 Double_t dphi=phi-phid;
79 if (dphi<0.) dphi+=TMath::TwoPi();
80 if (dphi>TMath::Pi()) dphi=TMath::TwoPi()-dphi;
81 Double_t drphi=r*dphi;
82 Double_t dx=x[0]-d[0];
83 Double_t dy=x[1]-d[1];
84 Double_t dz=x[2]-d[2];
86 Double_t bx = GetBx(r,phi,z,0);
87 Double_t by = GetBy(r,phi,z,0);
88 Double_t bz = GetBz(r,phi,z,0);
89 Double_t br = GetBr(r,phi,z,0);
90 Double_t brfi = GetBrfi(r,phi,z,0);
92 Double_t bxi = GetBxI(r,phi,z,0);
93 Double_t byi = GetByI(r,phi,z,0);
94 Double_t bzi = GetBzI(r,phi,z,0);
95 Double_t bri = GetBrI(r,phi,z,0);
96 Double_t brfii = GetBrfiI(r,phi,z,0);
129 Double_t AliTPCExB::GetDr(Double_t r, Double_t phi, Double_t z){
132 // Posibble to us it for visualization
135 if (!fgInstance) return 0;
136 Double_t pos0[3] = {r*TMath::Cos(phi), r*TMath::Sin(phi),z};
138 fgInstance->Correct(pos0,pos1);
139 Double_t dx=pos1[0]-pos0[0];
140 Double_t dy=pos1[1]-pos0[1];
141 // Double_t dz=pos1[2]-pos0[2];
142 return TMath::Sqrt(dx*dx+dy*dy);
146 Double_t AliTPCExB::GetDrphi(Double_t r, Double_t phi, Double_t z){
150 if (!fgInstance) return 0;
151 Double_t pos0[3] = {r*TMath::Cos(phi), r*TMath::Sin(phi),z};
153 fgInstance->Correct(pos0,pos1);
154 Double_t dphi=TMath::ATan2(pos1[1],pos1[0])-TMath::ATan2(pos0[1],pos0[0]);
160 Double_t AliTPCExB::GetDphi(Double_t r, Double_t phi, Double_t z){
164 if (!fgInstance) return 0;
165 Double_t pos0[3] = {r*TMath::Cos(phi), r*TMath::Sin(phi),z};
167 fgInstance->Correct(pos0,pos1);
168 Double_t dphi=TMath::ATan2(pos1[1],pos1[0])-TMath::ATan2(pos0[1],pos0[0]);
173 Double_t AliTPCExB::GetDz(Double_t r, Double_t phi, Double_t z){
177 if (!fgInstance) return 0;
178 Double_t pos0[3] = {r*TMath::Cos(phi), r*TMath::Sin(phi),z};
180 fgInstance->Correct(pos0,pos1);
181 Double_t dz=pos1[2]-pos0[2];
192 void AliTPCExB::RegisterField(Int_t index, AliMagF * magf){
194 // add the filed to the list
196 fgArray.AddAt(magf,index);
201 Double_t AliTPCExB::GetBx(Double_t r, Double_t phi, Double_t z,Int_t index){
205 AliMagF *mag = (AliMagF*)fgArray.At(index);
207 Float_t xyz[3]={r*TMath::Cos(phi),r*TMath::Sin(phi),z};
210 mag->Field(xyz,bxyz);
214 Double_t AliTPCExB::GetBy(Double_t r, Double_t phi, Double_t z,Int_t index){
218 AliMagF *mag = (AliMagF*)fgArray.At(index);
220 Float_t xyz[3]={r*TMath::Cos(phi),r*TMath::Sin(phi),z};
223 mag->Field(xyz,bxyz);
227 Double_t AliTPCExB::GetBz(Double_t r, Double_t phi, Double_t z,Int_t index){
231 AliMagF *mag = (AliMagF*)fgArray.At(index);
233 Float_t xyz[3]={r*TMath::Cos(phi),r*TMath::Sin(phi),z};
236 mag->Field(xyz,bxyz);
242 Double_t AliTPCExB::GetBr(Double_t r, Double_t phi, Double_t z,Int_t index){
246 AliMagF *mag = (AliMagF*)fgArray.At(index);
248 Float_t xyz[3]={r*TMath::Cos(phi),r*TMath::Sin(phi),z};
251 mag->Field(xyz,bxyz);
253 Float_t br = (bxyz[0]*xyz[0]+bxyz[1]*xyz[1])/r;
257 Double_t AliTPCExB::GetBrfi(Double_t r, Double_t phi, Double_t z,Int_t index){
261 AliMagF *mag = (AliMagF*)fgArray.At(index);
263 Float_t xyz[3]={r*TMath::Cos(phi),r*TMath::Sin(phi),z};
266 mag->Field(xyz,bxyz);
268 Float_t br = (-bxyz[0]*xyz[1]+bxyz[1]*xyz[0])/r;
275 Double_t AliTPCExB::GetBxI(Double_t r, Double_t phi, Double_t z,Int_t index)
279 for (Float_t zi=z;zi<250;zi+=5){
280 sumf+=GetBx(r,phi,zi,index)/GetBz(r,phi,zi,index);
284 for (Float_t zi=z;zi>-250;zi-=5){
285 sumf+=GetBx(r,phi,zi,index)/GetBz(r,phi,zi,index);
291 Double_t AliTPCExB::GetByI(Double_t r, Double_t phi, Double_t z,Int_t index)
295 for (Float_t zi=z;zi<250;zi+=5){
296 sumf+=GetBy(r,phi,zi,index)/GetBz(r,phi,zi,index);
300 for (Float_t zi=z;zi>-250;zi-=5){
301 sumf+=GetBy(r,phi,zi,index)/GetBz(r,phi,zi,index);
307 Double_t AliTPCExB::GetBzI(Double_t r, Double_t phi, Double_t z,Int_t index)
311 for (Float_t zi=z;zi<250;zi+=5){
312 sumf+=GetBz(r,phi,zi,index);
316 for (Float_t zi=z;zi>-250;zi-=5){
317 sumf+=GetBz(r,phi,zi,index);
324 Double_t AliTPCExB::GetBrI(Double_t r, Double_t phi, Double_t z,Int_t index)
328 for (Float_t zi=z;zi<250;zi+=5){
329 sumf+=GetBr(r,phi,zi,index)/GetBz(r,phi,zi,index);
333 for (Float_t zi=z;zi>-250;zi-=5){
334 sumf+=GetBr(r,phi,zi,index)/GetBz(r,phi,zi,index);
340 Double_t AliTPCExB::GetBrfiI(Double_t r, Double_t phi, Double_t z,Int_t index)
344 for (Float_t zi=z;zi<250;zi+=5.){
345 sumf+=GetBrfi(r,phi,zi,index)/GetBz(r,phi,zi,index);
349 for (Float_t zi=z;zi>-250;zi-=5){
350 sumf+=GetBrfi(r,phi,zi,index)/GetBz(r,phi,zi,index);
357 Double_t AliTPCExB::Eval(Int_t type, Double_t r, Double_t phi, Double_t z){
359 // Evaluate parameterization
363 if (z>0 && fMatBrBzI0) return EvalMat(*fMatBrBzI0,r,phi,z);
364 if (z<0 && fMatBrBzI1) return EvalMat(*fMatBrBzI1,r,phi,z);
366 // brfi integral param
368 if (z>0 && fMatBrfiBzI0) return EvalMat(*fMatBrfiBzI0,r,phi,z);
369 if (z<0 && fMatBrfiBzI1) return EvalMat(*fMatBrfiBzI1,r,phi,z);
372 if (type==2 && fMatBrBz) return EvalMat(*fMatBrBz,r,phi,z);
374 if (type==3 && fMatBrfiBz) return EvalMat(*fMatBrfiBz,r,phi,z);
379 Double_t AliTPCExB::EvalMat(TVectorD &vec, Double_t r, Double_t phi, Double_t z){
381 // Evaluate taylor expansion in r,phi,z
384 //tree->SetAlias("sa","sin(phi+0.0)");
385 //tree->SetAlias("ca","cos(phi+0.0)");
386 //tree->SetAlias("sa2","sin(phi*2+0.0)");
387 //tree->SetAlias("ca2","cos(phi*2+0.0)");
388 //tree->SetAlias("zn","(x2/250.)");
389 //tree->SetAlias("rn","(r/250.)")
390 // TString fstringSym="";
392 // fstringSym+="zn++";
393 // fstringSym+="rn++";
394 // fstringSym+="zn*rn++";
395 // fstringSym+="zn*zn++";
396 // fstringSym+="zn*zn*rn++";
397 // fstringSym+="zn*rn*rn++";
399 // fstringSym+="sa++";
400 // fstringSym+="ca++";
401 // fstringSym+="ca2++";
402 // fstringSym+="sa2++";
403 // fstringSym+="ca*zn++";
404 // fstringSym+="sa*zn++";
405 // fstringSym+="ca2*zn++";
406 // fstringSym+="sa2*zn++";
407 // fstringSym+="ca*zn*zn++";
408 // fstringSym+="sa*zn*zn++";
409 // fstringSym+="ca*zn*rn++";
410 // fstringSym+="sa*zn*rn++";
413 Double_t sa = TMath::Sin(phi);
414 Double_t ca = TMath::Cos(phi);
415 Double_t sa2 = TMath::Sin(phi*2);
416 Double_t ca2 = TMath::Cos(phi*2);
417 Double_t zn = z/250.;
418 Double_t rn = r/250.;
420 Double_t res = vec[ipoint++];
421 res+=vec[ipoint++]*zn;
422 res+=vec[ipoint++]*rn;
423 res+=vec[ipoint++]*zn*rn;
424 res+=vec[ipoint++]*zn*zn;
425 res+=vec[ipoint++]*zn*zn*rn;
426 res+=vec[ipoint++]*zn*rn*rn;
428 res+=vec[ipoint++]*sa;
429 res+=vec[ipoint++]*ca;
430 res+=vec[ipoint++]*ca2;
431 res+=vec[ipoint++]*sa2;
432 res+=vec[ipoint++]*ca*zn;
433 res+=vec[ipoint++]*sa*zn;
434 res+=vec[ipoint++]*ca2*zn;
435 res+=vec[ipoint++]*sa2*zn;
436 res+=vec[ipoint++]*ca*zn*zn;
437 res+=vec[ipoint++]*sa*zn*zn;
438 res+=vec[ipoint++]*ca*zn*rn;
439 res+=vec[ipoint++]*sa*zn*rn;
459 draw.RegisterField(0,new AliMagWrapCheb("Maps","Maps", 2, 1., 10., AliMagWrapCheb::k5kG));
460 draw.RegisterField(1,new AliMagFMaps("Maps","Maps", 2, 1., 10., 2));
462 TF2 fbz_rz_0pi("fbz_rz_0pi","AliTPCExB::GetBz(x,0*pi,y)",0,250,-250,250);
463 fbz_rz_0pi->Draw("surf2");
465 TF1 fbz_z_90_00pi("fbz_z_90_00pi","AliTPCExB::GetBz(90,0*pi,x)",-250,250);
466 TF1 fbz_z_90_05pi("fbz_z_90_05pi","AliTPCExB::GetBz(90,0.5*pi,x)",-250,250);
467 TF1 fbz_z_90_10pi("fbz_z_90_10pi","AliTPCExB::GetBz(90,1.0*pi,x)",-250,250);
468 TF1 fbz_z_90_15pi("fbz_z_90_15pi","AliTPCExB::GetBz(90,1.5*pi,x)",-250,250);
469 fbz_z_90_00pi->SetLineColor(2);
470 fbz_z_90_05pi->SetLineColor(3);
471 fbz_z_90_10pi->SetLineColor(4);
472 fbz_z_90_15pi->SetLineColor(5);
473 fbz_z_90_00pi->Draw()
474 fbz_z_90_05pi->Draw("same")
475 fbz_z_90_15pi->Draw("same")
476 fbz_z_90_10pi->Draw("same")
479 TF1 fbr_z_90_00pi("fbz_z_90_00pi","AliTPCExB::GetBr(90,0*pi,x)",-250,250);
480 TF1 fbr_z_90_05pi("fbz_z_90_05pi","AliTPCExB::GetBr(90,0.5*pi,x)",-250,250);
481 TF1 fbr_z_90_10pi("fbz_z_90_10pi","AliTPCExB::GetBr(90,1.0*pi,x)",-250,250);
482 TF1 fbr_z_90_15pi("fbz_z_90_15pi","AliTPCExB::GetBr(90,1.5*pi,x)",-250,250);
483 fbr_z_90_00pi->SetLineColor(2);
484 fbr_z_90_05pi->SetLineColor(3);
485 fbr_z_90_10pi->SetLineColor(4);
486 fbr_z_90_15pi->SetLineColor(5);
487 fbr_z_90_00pi->Draw()
488 fbr_z_90_05pi->Draw("same")
489 fbr_z_90_15pi->Draw("same")
490 fbr_z_90_10pi->Draw("same")
493 TF2 fbz_xy_0z("fbz_xy_0z","AliTPCExB::GetBz(sqrt(x^2+y^2),atan2(y,x),0)",-250,250,-250,250);
494 fbz_xy_0z.SetNpy(100);
495 fbz_xy_0z.SetNpx(100);
496 fbz_xy_0z->Draw("colz");
498 TF2 fbz_xy_250z("fbz_xy_250z","AliTPCExB::GetBz(sqrt(x^2+y^2),atan2(y,x),250)",-250,250,-250,250);
499 fbz_xy_250z.SetNpy(100);
500 fbz_xy_250z.SetNpx(100)
501 fbz_xy_250z->Draw("colz");
503 TF2 fbz_xy_m250z("fbz_xy_m250z","AliTPCExB::GetBz(sqrt(x^2+y^2),atan2(y,x),-250)",-250,250,-250,250);
504 fbz_xy_m250z.SetNpy(100);
505 fbz_xy_m250z.SetNpx(100)
506 fbz_xy_m250z->Draw("colz");