3 #include "TTreeStream.h"
5 #include "TLinearFitter.h"
6 #include "AliTPCcalibDB.h"
10 // Abstract class for ExB effect parameterization
14 // The ExB correction map is stored in the calib DB
15 // The lookup can be dumped to the tree:
19 char *storage = "local://OCDBres"
21 AliCDBManager::Instance()->SetDefaultStorage(storage);
22 AliCDBManager::Instance()->SetRun(RunNumber)
23 AliTPCExBFirst * exb = AliTPCcalibDB::Instance()->GetExB();
25 // See example macro $ALICE_ROOT/TPC/macros/AliTPCExBdraw.C
27 .L $ALICE_ROOT/TPC/macros/AliTPCExBdraw.C
35 AliTPCExB* AliTPCExB::fgInstance = 0;
37 TObjArray AliTPCExB::fgArray;
43 AliTPCExB::AliTPCExB():
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
53 // default constructor
58 void AliTPCExB::TestExB(const char* fileName) {
61 // Dump the filed and corrections to the tree in file fileName
64 TTreeSRedirector ts(fileName);
66 for (x[0]=-250.;x[0]<=250.;x[0]+=10.)
67 for (x[1]=-250.;x[1]<=250.;x[1]+=10.)
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]);
75 Double_t rd=TMath::Sqrt(d[0]*d[0]+d[1]*d[1]);
77 Double_t phi=TMath::ATan2(x[1],x[0]);
78 Double_t phid=TMath::ATan2(d[1],d[0]);
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];
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);
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);
130 Double_t AliTPCExB::GetDr(Double_t r, Double_t phi, Double_t z, Double_t bz){
133 // Posibble to us it for visualization
136 AliTPCExB *exb = AliTPCcalibDB::GetExB(bz,kFALSE);
138 Double_t pos0[3] = {r*TMath::Cos(phi), r*TMath::Sin(phi),z};
140 exb->Correct(pos0,pos1);
141 Double_t dx=pos1[0]-pos0[0];
142 Double_t dy=pos1[1]-pos0[1];
143 // Double_t dz=pos1[2]-pos0[2];
144 // return TMath::Sqrt(dx*dx+dy*dy);
145 Float_t dr = (dx*pos0[0]+dy*pos0[1])/r;
150 Double_t AliTPCExB::GetDrphi(Double_t r, Double_t phi, Double_t z, Double_t bz){
154 AliTPCExB *exb = AliTPCcalibDB::GetExB(bz,kFALSE);
156 Double_t pos0[3] = {r*TMath::Cos(phi), r*TMath::Sin(phi),z};
158 exb->Correct(pos0,pos1);
159 Double_t dphi=TMath::ATan2(pos1[1],pos1[0])-TMath::ATan2(pos0[1],pos0[0]);
165 Double_t AliTPCExB::GetDphi(Double_t r, Double_t phi, Double_t z, Double_t bz){
169 AliTPCExB *exb = AliTPCcalibDB::GetExB(bz,kFALSE);
171 Double_t pos0[3] = {r*TMath::Cos(phi), r*TMath::Sin(phi),z};
173 exb->Correct(pos0,pos1);
174 Double_t dphi=TMath::ATan2(pos1[1],pos1[0])-TMath::ATan2(pos0[1],pos0[0]);
179 Double_t AliTPCExB::GetDz(Double_t r, Double_t phi, Double_t z, Double_t bz){
183 AliTPCExB *exb = AliTPCcalibDB::GetExB(bz,kFALSE);
185 Double_t pos0[3] = {r*TMath::Cos(phi), r*TMath::Sin(phi),z};
187 exb->Correct(pos0,pos1);
188 Double_t dz=pos1[2]-pos0[2];
199 void AliTPCExB::RegisterField(Int_t index, AliMagF * magf){
201 // add the filed to the list
203 fgArray.AddAt(magf,index);
208 Double_t AliTPCExB::GetBx(Double_t r, Double_t phi, Double_t z,Int_t index){
212 AliMagF *mag = (AliMagF*)fgArray.At(index);
214 Float_t xyz[3]={r*TMath::Cos(phi),r*TMath::Sin(phi),z};
217 mag->Field(xyz,bxyz);
221 Double_t AliTPCExB::GetBy(Double_t r, Double_t phi, Double_t z,Int_t index){
225 AliMagF *mag = (AliMagF*)fgArray.At(index);
227 Float_t xyz[3]={r*TMath::Cos(phi),r*TMath::Sin(phi),z};
230 mag->Field(xyz,bxyz);
234 Double_t AliTPCExB::GetBz(Double_t r, Double_t phi, Double_t z,Int_t index){
238 AliMagF *mag = (AliMagF*)fgArray.At(index);
240 Float_t xyz[3]={r*TMath::Cos(phi),r*TMath::Sin(phi),z};
243 mag->Field(xyz,bxyz);
249 Double_t AliTPCExB::GetBr(Double_t r, Double_t phi, Double_t z,Int_t index){
253 AliMagF *mag = (AliMagF*)fgArray.At(index);
255 Float_t xyz[3]={r*TMath::Cos(phi),r*TMath::Sin(phi),z};
258 mag->Field(xyz,bxyz);
260 Float_t br = (bxyz[0]*xyz[0]+bxyz[1]*xyz[1])/r;
264 Double_t AliTPCExB::GetBrfi(Double_t r, Double_t phi, Double_t z,Int_t index){
268 AliMagF *mag = (AliMagF*)fgArray.At(index);
270 Float_t xyz[3]={r*TMath::Cos(phi),r*TMath::Sin(phi),z};
273 mag->Field(xyz,bxyz);
275 Float_t br = (-bxyz[0]*xyz[1]+bxyz[1]*xyz[0])/r;
282 Double_t AliTPCExB::GetBxI(Double_t r, Double_t phi, Double_t z,Int_t index)
286 for (Float_t zi=z;zi<250;zi+=5){
287 sumf+=GetBx(r,phi,zi,index)/GetBz(r,phi,zi,index);
291 for (Float_t zi=z;zi>-250;zi-=5){
292 sumf+=GetBx(r,phi,zi,index)/GetBz(r,phi,zi,index);
298 Double_t AliTPCExB::GetByI(Double_t r, Double_t phi, Double_t z,Int_t index)
302 for (Float_t zi=z;zi<250;zi+=5){
303 sumf+=GetBy(r,phi,zi,index)/GetBz(r,phi,zi,index);
307 for (Float_t zi=z;zi>-250;zi-=5){
308 sumf+=GetBy(r,phi,zi,index)/GetBz(r,phi,zi,index);
314 Double_t AliTPCExB::GetBzI(Double_t r, Double_t phi, Double_t z,Int_t index)
318 for (Float_t zi=z;zi<250;zi+=5){
319 sumf+=GetBz(r,phi,zi,index);
323 for (Float_t zi=z;zi>-250;zi-=5){
324 sumf+=GetBz(r,phi,zi,index);
331 Double_t AliTPCExB::GetBrI(Double_t r, Double_t phi, Double_t z,Int_t index)
335 for (Float_t zi=z;zi<250;zi+=5){
336 sumf+=GetBr(r,phi,zi,index)/GetBz(r,phi,zi,index);
340 for (Float_t zi=z;zi>-250;zi-=5){
341 sumf+=GetBr(r,phi,zi,index)/GetBz(r,phi,zi,index);
347 Double_t AliTPCExB::GetBrfiI(Double_t r, Double_t phi, Double_t z,Int_t index)
351 for (Float_t zi=z;zi<250;zi+=5.){
352 sumf+=GetBrfi(r,phi,zi,index)/GetBz(r,phi,zi,index);
356 for (Float_t zi=z;zi>-250;zi-=5){
357 sumf+=GetBrfi(r,phi,zi,index)/GetBz(r,phi,zi,index);
364 Double_t AliTPCExB::Eval(Int_t type, Double_t r, Double_t phi, Double_t z){
366 // Evaluate parameterization
370 if (z>0 && fMatBrBzI0) return EvalMat(*fMatBrBzI0,r,phi,z);
371 if (z<0 && fMatBrBzI1) return EvalMat(*fMatBrBzI1,r,phi,z);
373 // brfi integral param
375 if (z>0 && fMatBrfiBzI0) return EvalMat(*fMatBrfiBzI0,r,phi,z);
376 if (z<0 && fMatBrfiBzI1) return EvalMat(*fMatBrfiBzI1,r,phi,z);
379 if (type==2 && fMatBrBz) return EvalMat(*fMatBrBz,r,phi,z);
381 if (type==3 && fMatBrfiBz) return EvalMat(*fMatBrfiBz,r,phi,z);
386 Double_t AliTPCExB::EvalMat(TVectorD &vec, Double_t r, Double_t phi, Double_t z){
388 // Evaluate taylor expansion in r,phi,z
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="";
399 // fstringSym+="zn++";
400 // fstringSym+="rn++";
401 // fstringSym+="zn*rn++";
402 // fstringSym+="zn*zn++";
403 // fstringSym+="zn*zn*rn++";
404 // fstringSym+="zn*rn*rn++";
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++";
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.;
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;
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;
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));
469 TF2 fbz_rz_0pi("fbz_rz_0pi","AliTPCExB::GetBz(x,0*pi,y)",0,250,-250,250);
470 fbz_rz_0pi->Draw("surf2");
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")
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")
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");
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");
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");