1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
18 ///////////////////////////////////////////////////////////////////////
19 // Manager and of geomety classes for set: TPC //
21 // !sectors are numbered from 0 //
22 // !pad rows are numbered from 0 //
24 // 27.7. - AliTPCPaaramSr object for TPC
25 // TPC with straight pad rows
26 // Origin: Marian Ivanov, Uni. of Bratislava, ivanov@fmph.uniba.sk //
28 ///////////////////////////////////////////////////////////////////////
30 //#include <Riostream.h>
33 #include "AliTPCPRF2D.h"
34 #include "AliTPCParamSR.h"
35 #include "AliTPCRF1D.h"
37 #include "AliTPCROC.h"
38 #include "TGeoManager.h"
40 ClassImp(AliTPCParamSR)
41 static const Int_t kMaxRows=600;
42 static const Float_t kEdgeSectorSpace = 2.5;
43 static const Float_t kFacSigmaPadRow=3.;
44 static const Float_t kFacSigmaPad=3.;
45 static const Float_t kFacSigmaTime=3.;
48 AliTPCParamSR::AliTPCParamSR()
59 //constructor set the default parameters
62 fFacSigmaPadRow = Float_t(kFacSigmaPadRow);
63 fFacSigmaPad = Float_t(kFacSigmaPad);
64 fFacSigmaTime = Float_t(kFacSigmaTime);
69 AliTPCParamSR::~AliTPCParamSR()
72 //destructor destroy some dynmicaly alocated variables
73 if (fInnerPRF != 0) delete fInnerPRF;
74 if (fOuter1PRF != 0) delete fOuter1PRF;
75 if (fOuter2PRF != 0) delete fOuter2PRF;
76 if (fTimeRF != 0) delete fTimeRF;
79 void AliTPCParamSR::SetDefault()
81 //set default TPC param
83 AliTPCParam::SetDefault();
86 Int_t AliTPCParamSR::CalcResponse(Float_t* xyz, Int_t * index, Int_t row)
89 //calculate bin response as function of the input position -x
90 //return number of valid response bin
92 //we suppose that coordinate is expressed in float digits
93 // it's mean coordinate system 8
94 //xyz[0] - float padrow xyz[1] is float pad (center pad is number 0) and xyz[2] is float time bin
95 //xyz[3] - electron time in float time bin format
96 if ( (fInnerPRF==0)||(fOuter1PRF==0)||(fOuter2PRF==0) ||(fTimeRF==0) ){
97 Error("AliTPCParamSR", "response function was not adjusted");
101 Float_t sfpadrow; // sigma of response function
102 Float_t sfpad; // sigma of
103 Float_t sftime= fFacSigmaTime*fTimeRF->GetSigma()/fZWidth; //3 sigma of time response
104 if (index[1]<fNInnerSector){
105 sfpadrow =fFacSigmaPadRow*fInnerPRF->GetSigmaY()/fInnerPadPitchLength;
106 sfpad =fFacSigmaPad*fInnerPRF->GetSigmaX()/fInnerPadPitchWidth;
110 sfpadrow =fFacSigmaPadRow*fOuter1PRF->GetSigmaY()/fOuter1PadPitchLength;
111 sfpad =fFacSigmaPad*fOuter1PRF->GetSigmaX()/fOuterPadPitchWidth;}
113 sfpadrow =fFacSigmaPadRow*fOuter2PRF->GetSigmaY()/fOuter2PadPitchLength;
114 sfpad =fFacSigmaPad*fOuter2PRF->GetSigmaX()/fOuterPadPitchWidth;
118 Int_t fpadrow = TMath::Max(TMath::Nint(index[2]+xyz[0]-sfpadrow),0); //"first" padrow
119 Int_t fpad = TMath::Nint(xyz[1]-sfpad); //first pad
120 Int_t ftime = TMath::Max(TMath::Nint(xyz[2]+xyz[3]+GetZOffset()/GetZWidth()-sftime),0); // first time
121 Int_t lpadrow = TMath::Min(TMath::Nint(index[2]+xyz[0]+sfpadrow),fpadrow+19); //"last" padrow
122 lpadrow = TMath::Min(GetNRow(index[1])-1,lpadrow);
123 Int_t lpad = TMath::Min(TMath::Nint(xyz[1]+sfpad),fpad+19); //last pad
124 Int_t ltime = TMath::Min(TMath::Nint(xyz[2]+xyz[3]+GetZOffset()/GetZWidth()+sftime),ftime+19); // last time
125 ltime = TMath::Min(ltime,GetMaxTBin()-1);
127 Int_t npads = GetNPads(index[1],row);
132 if (ftime<0) ftime=0;
134 if (row>=0) { //if we are interesting about given pad row
135 if (fpadrow<=row) fpadrow =row;
138 if (lpadrow>=row) lpadrow = row;
144 Float_t padres[20][20]; //I don't expect bigger number of bins
150 //calculate padresponse function
152 for (padrow = fpadrow;padrow<=lpadrow;padrow++)
153 for (pad = fpad;pad<=lpad;pad++){
154 Float_t dy = (xyz[0]+Float_t(index[2]-padrow));
155 Float_t dx = (xyz[1]+Float_t(pad));
156 if (index[1]<fNInnerSector)
157 padres[padrow-fpadrow][pad-fpad]=fInnerPRF->GetPRF(dx*fInnerPadPitchWidth,dy*fInnerPadPitchLength);
160 padres[padrow-fpadrow][pad-fpad]=fOuter1PRF->GetPRF(dx*fOuterPadPitchWidth,dy*fOuter1PadPitchLength);}
162 padres[padrow-fpadrow][pad-fpad]=fOuter2PRF->GetPRF(dx*fOuterPadPitchWidth,dy*fOuter2PadPitchLength);}}}
163 //calculate time response function
165 for (time = ftime;time<=ltime;time++)
166 timeres[time-ftime]= fTimeRF->GetRF((-xyz[2]-xyz[3]+Float_t(time))*fZWidth);
167 //write over threshold values to stack
168 for (padrow = fpadrow;padrow<=lpadrow;padrow++)
169 for (pad = fpad;pad<=lpad;pad++)
170 for (time = ftime;time<=ltime;time++){
171 cweight = timeres[time-ftime]*padres[padrow-fpadrow][pad-fpad];
172 if (cweight>fResponseThreshold) {
173 fResponseBin[cindex3]=padrow;
174 fResponseBin[cindex3+1]=pad;
175 fResponseBin[cindex3+2]=time;
177 fResponseWeight[cindex]=cweight;
186 void AliTPCParamSR::TransformTo8(Float_t *xyz, Int_t *index) const
189 // transformate point to digit coordinate
191 if (index[0]==0) Transform0to1(xyz,index);
192 if (index[0]==1) Transform1to2(xyz,index);
193 if (index[0]==2) Transform2to3(xyz,index);
194 if (index[0]==3) Transform3to4(xyz,index);
195 if (index[0]==4) Transform4to8(xyz,index);
198 void AliTPCParamSR::TransformTo2(Float_t *xyz, Int_t *index) const
201 //transformate point to rotated coordinate
204 if (index[0]==0) Transform0to1(xyz,index);
205 if (index[0]==1) Transform1to2(xyz,index);
206 if (index[0]==4) Transform4to3(xyz,index);
207 if (index[0]==8) { //if we are in digit coordinate system transform to global
208 Transform8to4(xyz,index);
209 Transform4to3(xyz,index);
213 void AliTPCParamSR::CRXYZtoXYZ(Float_t *xyz,
214 const Int_t §or, const Int_t & padrow, Int_t option) const
216 //transform relative coordinates to absolute
217 Bool_t rel = ( (option&2)!=0);
218 Int_t index[3]={sector,padrow,0};
219 if (rel==kTRUE) Transform4to3(xyz,index);//if the position is relative to pad row
220 Transform2to1(xyz,index);
223 void AliTPCParamSR::XYZtoCRXYZ(Float_t *xyz,
224 Int_t §or, Int_t & padrow, Int_t option) const
226 //transform global position to the position relative to the sector padrow
227 //if option=0 X calculate absolute calculate sector
228 //if option=1 X absolute use input sector
229 //if option=2 X relative to pad row calculate sector
230 //if option=3 X relative use input sector
231 //!!!!!!!!! WE start to calculate rows from row = 0
233 Bool_t rel = ( (option&2)!=0);
235 //option 0 and 2 means that we don't have information about sector
236 if ((option&1)==0) Transform0to1(xyz,index); //we calculate sector number
239 Transform1to2(xyz,index);
240 Transform2to3(xyz,index);
241 //if we store relative position calculate position relative to pad row
242 if (rel==kTRUE) Transform3to4(xyz,index);
247 Float_t AliTPCParamSR::GetPrimaryLoss(Float_t */*x*/, Int_t *index, Float_t *angle)
251 Float_t padlength=GetPadPitchLength(index[1]);
252 Float_t a1=TMath::Sin(angle[0]);
254 Float_t a2=TMath::Sin(angle[1]);
256 Float_t length =padlength*TMath::Sqrt(1+a1+a2);
257 return length*fNPrimLoss;
260 Float_t AliTPCParamSR::GetTotalLoss(Float_t */*x*/, Int_t *index, Float_t *angle)
264 Float_t padlength=GetPadPitchLength(index[1]);
265 Float_t a1=TMath::Sin(angle[0]);
267 Float_t a2=TMath::Sin(angle[1]);
269 Float_t length =padlength*TMath::Sqrt(1+a1+a2);
270 return length*fNTotalLoss;
275 void AliTPCParamSR::GetClusterSize(Float_t *x, Int_t *index, Float_t */*angle*/, Int_t /*mode*/, Float_t *sigma)
278 //return cluster sigma2 (x,y) for particle at position x
279 // in this case x coordinata is in drift direction
280 //and y in pad row direction
281 //we suppose that input coordinate system is digit system
284 Float_t lx[3] = {x[0],x[1],x[2]};
285 Int_t li[3] = {index[0],index[1],index[2]};
287 // Float_t sigmadiff;
291 xx = lx[2]; //calculate drift length in cm
293 sigma[0]+= xx*GetDiffL()*GetDiffL();
294 sigma[1]+= xx*GetDiffT()*GetDiffT();
298 //sigma[0]=sigma[1]=0;
299 if (GetTimeRF()!=0) sigma[0]+=GetTimeRF()->GetSigma()*GetTimeRF()->GetSigma();
300 if ( (index[1]<fNInnerSector) &&(GetInnerPRF()!=0))
301 sigma[1]+=GetInnerPRF()->GetSigmaX()*GetInnerPRF()->GetSigmaX();
302 if ( (index[1]>=fNInnerSector) &&(index[2]<fNRowUp1) && (GetOuter1PRF()!=0))
303 sigma[1]+=GetOuter1PRF()->GetSigmaX()*GetOuter1PRF()->GetSigmaX();
304 if( (index[1]>=fNInnerSector) &&(index[2]>=fNRowUp1) && (GetOuter2PRF()!=0))
305 sigma[1]+=GetOuter2PRF()->GetSigmaX()*GetOuter2PRF()->GetSigmaX();
308 sigma[0]/= GetZWidth()*GetZWidth();
309 sigma[1]/=GetPadPitchWidth(index[0])*GetPadPitchWidth(index[0]);
315 void AliTPCParamSR::GetSpaceResolution(Float_t */*x*/, Int_t */*index*/, Float_t */*angle*/,
316 Float_t /*amplitude*/, Int_t /*mode*/, Float_t */*sigma*/)
323 Float_t AliTPCParamSR::GetAmp(Float_t */*x*/, Int_t */*index*/, Float_t */*angle*/)
331 Float_t * AliTPCParamSR::GetAnglesAccMomentum(Float_t *x, Int_t * index, Float_t* momentum, Float_t *angle)
334 //calculate angle of track to padrow at given position
335 // for given magnetic field and momentum of the particle
338 TransformTo2(x,index);
339 AliDetectorParam::GetAnglesAccMomentum(x,index,momentum,angle);
340 Float_t addangle = TMath::ASin(x[1]/GetPadRowRadii(index[1],index[2]));
346 Bool_t AliTPCParamSR::Update()
349 if (AliTPCParam::Update()==kFALSE) return kFALSE;
352 Float_t firstrow = fInnerRadiusLow + 1.575;
353 for( i= 0;i<fNRowLow;i++)
355 Float_t x = firstrow + fInnerPadPitchLength*(Float_t)i;
357 // number of pads per row
358 // Float_t y = (x-0.5*fInnerPadPitchLength)*tan(fInnerAngle/2.)-fInnerWireMount-
359 // fInnerPadPitchWidth/2.;
360 // 0 and fNRowLow+1 reserved for cross talk rows
361 fYInner[i+1] = x*tan(fInnerAngle/2.)-fInnerWireMount;
362 //fNPadsLow[i] = 1+2*(Int_t)(y/fInnerPadPitchWidth) ;
363 fNPadsLow[i] = AliTPCROC::Instance()->GetNPads(0,i) ; // ROC implement
366 fYInner[0]=(fPadRowLow[0]-fInnerPadPitchLength)*tan(fInnerAngle/2.)-fInnerWireMount;
367 fYInner[fNRowLow+1]=(fPadRowLow[fNRowLow-1]+fInnerPadPitchLength)*tan(fInnerAngle/2.)-fInnerWireMount;
368 firstrow = fOuterRadiusLow + 1.6;
369 for(i=0;i<fNRowUp;i++)
372 Float_t x = firstrow + fOuter1PadPitchLength*(Float_t)i;
374 // Float_t y =(x-0.5*fOuter1PadPitchLength)*tan(fOuterAngle/2.)-fOuterWireMount-
375 // fOuterPadPitchWidth/2.;
376 fYOuter[i+1]= x*tan(fOuterAngle/2.)-fOuterWireMount;
377 //fNPadsUp[i] = 1+2*(Int_t)(y/fOuterPadPitchWidth) ;
378 fNPadsUp[i] = AliTPCROC::Instance()->GetNPads(36,i) ; // ROC implement
380 fLastWireUp1=fPadRowUp[i] +0.625;
381 firstrow = fPadRowUp[i] + 0.5*(fOuter1PadPitchLength+fOuter2PadPitchLength);
386 Float_t x = firstrow + fOuter2PadPitchLength*(Float_t)(i-64);
388 //Float_t y =(x-0.5*fOuter2PadPitchLength)*tan(fOuterAngle/2.)-fOuterWireMount-
389 // fOuterPadPitchWidth/2.;
390 //fNPadsUp[i] = 1+2*(Int_t)(y/fOuterPadPitchWidth) ;
391 fNPadsUp[i] = AliTPCROC::Instance()->GetNPads(36,i) ; // ROC implement
393 fYOuter[i+1] = fPadRowUp[i]*tan(fOuterAngle/2.)-fOuterWireMount;
396 fYOuter[0]=(fPadRowUp[0]-fOuter1PadPitchLength)*tan(fOuterAngle/2.)-fOuterWireMount;
397 fYOuter[fNRowUp+1]=(fPadRowUp[fNRowUp-1]+fOuter2PadPitchLength)*tan(fOuterAngle/2.)-fOuterWireMount;
398 fNtRows = fNInnerSector*fNRowLow+fNOuterSector*fNRowUp;
402 Float_t AliTPCParamSR::GetYInner(Int_t irow) const
404 return fYInner[irow];
406 Float_t AliTPCParamSR::GetYOuter(Int_t irow) const
408 return fYOuter[irow];
411 void AliTPCParamSR::Streamer(TBuffer &R__b)
413 // Stream an object of class AliTPC.
415 if (R__b.IsReading()) {
416 Version_t R__v = R__b.ReadVersion(); if (R__v) { }
417 // TObject::Streamer(R__b);
418 AliTPCParam::Streamer(R__b);
419 // if (R__v < 2) return;
421 if (gGeoManager) ReadGeoMatrices();
423 R__b.WriteVersion(AliTPCParamSR::IsA());
424 //TObject::Streamer(R__b);
425 AliTPCParam::Streamer(R__b);
428 Int_t AliTPCParamSR::CalcResponseFast(Float_t* xyz, Int_t * index, Int_t row, Float_t phase)
431 //calculate bin response as function of the input position -x
432 //return number of valid response bin
434 //we suppose that coordinate is expressed in float digits
435 // it's mean coordinate system 8
436 //xyz[0] - electron position w.r.t. pad center, normalized to pad length,
437 //xyz[1] is float pad (center pad is number 0) and xyz[2] is float time bin
438 //xyz[3] - electron time in float time bin format
439 if ( (fInnerPRF==0)||(fOuter1PRF==0)||(fOuter2PRF==0) ||(fTimeRF==0) ){
440 Error("AliTPCParamSR", "response function was not adjusted");
444 const Int_t kpadn = 500;
445 const Float_t kfpadn = 500.;
446 const Int_t ktimen = 500;
447 const Float_t kftimen = 500.;
448 const Int_t kpadrn = 500;
449 const Float_t kfpadrn = 500.;
453 static Float_t prfinner[2*kpadrn][5*kpadn]; //pad divided by 50
454 static Float_t prfouter1[2*kpadrn][5*kpadn]; //prfouter division
455 static Float_t prfouter2[2*kpadrn][5*kpadn];
456 static Float_t kTanMax =0;
458 static Float_t rftime[5*ktimen]; //time division
459 static Int_t blabla=0;
460 static Float_t zoffset=0;
461 static Float_t zwidth=0;
462 static Float_t zoffset2=0;
463 static TH1F * hdiff=0;
464 static TH1F * hdiff1=0;
465 static TH1F * hdiff2=0;
467 if (blabla==0) { //calculate Response function - only at the begginning
468 kTanMax = TMath::ATan(10.*TMath::DegToRad());
469 hdiff =new TH1F("prf_diff","prf_diff",10000,-1,1);
470 hdiff1 =new TH1F("no_repsonse1","no_response1",10000,-1,1);
471 hdiff2 =new TH1F("no_response2","no_response2",10000,-1,1);
474 zoffset = GetZOffset();
476 zoffset2 = zoffset/zwidth;
477 for (Int_t i=0;i<5*ktimen;i++){
478 rftime[i] = fTimeRF->GetRF(((i-2.5*kftimen)/kftimen)*zwidth+zoffset);
480 for (Int_t i=0;i<5*kpadn;i++){
481 for (Int_t j=0;j<2*kpadrn;j++){
483 fInnerPRF->GetPRF((i-2.5*kfpadn)/kfpadn
484 *fInnerPadPitchWidth,(j-kfpadrn)/kfpadrn*fInnerPadPitchLength);
486 fOuter1PRF->GetPRF((i-2.5*kfpadn)/kfpadn
487 *fOuterPadPitchWidth,(j-kfpadrn)/kfpadrn*fOuter1PadPitchLength);
491 fOuter2PRF->GetPRF((i-2.5*kfpadn)/kfpadn
492 *fOuterPadPitchWidth,(j-kfpadrn)/kfpadrn*fOuter2PadPitchLength);
495 } // the above is calculated only once
497 // calculate central padrow, pad, time
498 Int_t npads = GetNPads(index[1],index[3]-1);
499 Int_t cpadrow = index[2]; // electrons are here
500 Int_t cpad = TMath::Nint(xyz[1]);
501 Int_t ctime = TMath::Nint(xyz[2]+zoffset2+xyz[3]);
503 Float_t dpadrow = xyz[0];
504 Float_t dpad = xyz[1]-cpad;
505 Float_t dtime = xyz[2]+zoffset2+xyz[3]-ctime+phase*0.25;
508 Int_t maxt =GetMaxTBin();
513 if (row>=0) { //if we are interesting about given pad row
514 fpadrow = row-cpadrow;
515 lpadrow = row-cpadrow;
517 fpadrow = (index[2]>1) ? -1 :0;
518 lpadrow = (index[2]<GetNRow(index[1])-1) ? 1:0;
521 Int_t fpad = (cpad > -npads/2+1) ? -2: -npads/2-cpad;
522 Int_t lpad = (cpad < npads/2-2) ? 2: npads/2-1-cpad;
523 Int_t ftime = (ctime>1) ? -2: -ctime;
524 Int_t ltime = (ctime<maxt-2) ? 2: maxt-ctime-1;
526 // cross talk from long pad to short one
527 if(row==fNRowUp1 && fpadrow==-1) {
528 dpadrow *= fOuter2PadPitchLength;
529 dpadrow += fOuterWWPitch;
530 dpadrow /= fOuter1PadPitchLength;
532 // cross talk from short pad to long one
533 if(row==fNRowUp1+1 && fpadrow==1){
534 dpadrow *= fOuter1PadPitchLength;
535 if(dpadrow < 0.) dpadrow = -1.; //protection against 3rd wire
536 dpadrow += fOuterWWPitch;
537 dpadrow /= fOuter2PadPitchLength;
542 Int_t apadrow = TMath::Nint((dpadrow-fpadrow)*kfpadrn+kfpadrn);
543 for (Int_t ipadrow = fpadrow; ipadrow<=lpadrow;ipadrow++){
544 if ( (apadrow<0) || (apadrow>=2*kpadrn))
546 // pad angular correction
549 angle = kTanMax*2.*(cpad+0.5)/Float_t(npads);
550 Float_t dpadangle =0;
551 if (index[1]<fNInnerSector){
552 dpadangle = angle*dpadrow*fInnerPadPitchLength/fInnerPadPitchWidth;
555 if(row < fNRowUp1+1){
556 dpadangle = angle*dpadrow*fOuter1PadPitchLength/fOuterPadPitchWidth;
559 dpadangle = angle*dpadrow*fOuter2PadPitchLength/fOuterPadPitchWidth;
562 if (ipadrow==0) dpadangle *=-1;
564 // Int_t apad= TMath::Nint((dpad-fpad)*kfpadn+2.5*kfpadn);
565 Int_t apad= TMath::Nint((dpad+dpadangle-fpad)*kfpadn+2.5*kfpadn);
566 for (Int_t ipad = fpad; ipad<=lpad;ipad++){
568 if (index[1]<fNInnerSector){
569 cweight=prfinner[apadrow][apad];
572 if(row < fNRowUp1+1){
573 cweight=prfouter1[apadrow][apad];
576 cweight=prfouter2[apadrow][apad];
579 // if (cweight<fResponseThreshold) continue;
580 Int_t atime = TMath::Nint((dtime-ftime)*kftimen+2.5*kftimen);
581 for (Int_t itime = ftime;itime<=ltime;itime++){
582 Float_t cweight2 = cweight*rftime[atime];
583 if (cweight2>fResponseThreshold) {
584 fResponseBin[cindex3++]=cpadrow+ipadrow;
585 fResponseBin[cindex3++]=cpad+ipad;
586 fResponseBin[cindex3++]=ctime+itime;
587 fResponseWeight[cindex++]=cweight2;