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 Revision 1.8 2002/06/05 15:37:31 kowal2
19 Added cross-talk from the wires beyond the first and the last rows
21 Revision 1.7 2002/03/18 17:59:13 kowal2
22 Chnges in the pad geometry - 3 pad lengths introduced.
24 Revision 1.6 2002/02/25 11:02:56 kowal2
25 Changes towards speeding up the code. Thanks to Marian Ivanov.
27 Revision 1.5 2001/12/06 07:49:30 kowal2
28 corrected number of pads calculation
30 Revision 1.4 2000/11/02 07:33:15 kowal2
31 Improvements of the code.
33 Revision 1.3 2000/06/30 12:07:50 kowal2
34 Updated from the TPC-PreRelease branch
36 Revision 1.2.4.2 2000/06/14 16:48:24 kowal2
37 Parameter setting improved. Removed compiler warnings
39 Revision 1.2.4.1 2000/06/09 07:55:39 kowal2
43 Revision 1.2 2000/04/17 09:37:33 kowal2
44 removed obsolete AliTPCDigitsDisplay.C
46 Revision 1.1.4.2 2000/04/10 11:36:13 kowal2
48 New Detector parameters handling class
52 ///////////////////////////////////////////////////////////////////////
53 // Manager and of geomety classes for set: TPC //
55 // !sectors are numbered from 0 //
56 // !pad rows are numbered from 0 //
58 // 27.7. - AliTPCPaaramSr object for TPC
59 // TPC with straight pad rows
60 // Origin: Marian Ivanov, Uni. of Bratislava, ivanov@fmph.uniba.sk //
62 ///////////////////////////////////////////////////////////////////////
68 #include <AliTPCParamSR.h>
69 #include "AliTPCPRF2D.h"
70 #include "AliTPCRF1D.h"
74 ClassImp(AliTPCParamSR)
75 const static Int_t kMaxRows=600;
76 const static Float_t kEdgeSectorSpace = 2.5;
77 const static Float_t kFacSigmaPadRow=3.;
78 const static Float_t kFacSigmaPad=3.;
79 const static Float_t kFacSigmaTime=3.;
82 AliTPCParamSR::AliTPCParamSR()
85 //constructor set the default parameters
90 fFacSigmaPadRow = Float_t(kFacSigmaPadRow);
91 fFacSigmaPad = Float_t(kFacSigmaPad);
92 fFacSigmaTime = Float_t(kFacSigmaTime);
97 AliTPCParamSR::~AliTPCParamSR()
100 //destructor destroy some dynmicaly alocated variables
101 if (fInnerPRF != 0) delete fInnerPRF;
102 if (fOuter1PRF != 0) delete fOuter1PRF;
103 if (fOuter2PRF != 0) delete fOuter2PRF;
104 if (fTimeRF != 0) delete fTimeRF;
107 void AliTPCParamSR::SetDefault()
109 //set default TPC param
111 AliTPCParam::SetDefault();
114 Int_t AliTPCParamSR::CalcResponse(Float_t* xyz, Int_t * index, Int_t row)
117 //calculate bin response as function of the input position -x
118 //return number of valid response bin
120 //we suppose that coordinate is expressed in float digits
121 // it's mean coordinate system 8
122 //xyz[0] - float padrow xyz[1] is float pad (center pad is number 0) and xyz[2] is float time bin
123 if ( (fInnerPRF==0)||(fOuter1PRF==0)||(fOuter2PRF==0) ||(fTimeRF==0) ){
124 Error("AliTPCParamSR", "response function was not adjusted");
128 Float_t sfpadrow; // sigma of response function
129 Float_t sfpad; // sigma of
130 Float_t sftime= fFacSigmaTime*fTimeRF->GetSigma()/fZWidth; //3 sigma of time response
131 if (index[1]<fNInnerSector){
132 sfpadrow =fFacSigmaPadRow*fInnerPRF->GetSigmaY()/fInnerPadPitchLength;
133 sfpad =fFacSigmaPad*fInnerPRF->GetSigmaX()/fInnerPadPitchWidth;
137 sfpadrow =fFacSigmaPadRow*fOuter1PRF->GetSigmaY()/fOuter1PadPitchLength;
138 sfpad =fFacSigmaPad*fOuter1PRF->GetSigmaX()/fOuterPadPitchWidth;}
140 sfpadrow =fFacSigmaPadRow*fOuter2PRF->GetSigmaY()/fOuter2PadPitchLength;
141 sfpad =fFacSigmaPad*fOuter2PRF->GetSigmaX()/fOuterPadPitchWidth;
145 Int_t fpadrow = TMath::Max(TMath::Nint(index[2]+xyz[0]-sfpadrow),0); //"first" padrow
146 Int_t fpad = TMath::Nint(xyz[1]-sfpad); //first pad
147 Int_t ftime = TMath::Max(TMath::Nint(xyz[2]+GetZOffset()/GetZWidth()-sftime),0); // first time
148 Int_t lpadrow = TMath::Min(TMath::Nint(index[2]+xyz[0]+sfpadrow),fpadrow+19); //"last" padrow
149 lpadrow = TMath::Min(GetNRow(index[1])-1,lpadrow);
150 Int_t lpad = TMath::Min(TMath::Nint(xyz[1]+sfpad),fpad+19); //last pad
151 Int_t ltime = TMath::Min(TMath::Nint(xyz[2]+GetZOffset()/GetZWidth()+sftime),ftime+19); // last time
152 ltime = TMath::Min(ltime,GetMaxTBin()-1);
154 Int_t npads = GetNPads(index[1],row);
159 if (ftime<0) ftime=0;
161 if (row>=0) { //if we are interesting about given pad row
162 if (fpadrow<=row) fpadrow =row;
165 if (lpadrow>=row) lpadrow = row;
171 Float_t padres[20][20]; //I don't expect bigger number of bins
177 //calculate padresponse function
179 for (padrow = fpadrow;padrow<=lpadrow;padrow++)
180 for (pad = fpad;pad<=lpad;pad++){
181 Float_t dy = (xyz[0]+Float_t(index[2]-padrow));
182 Float_t dx = (xyz[1]+Float_t(pad));
183 if (index[1]<fNInnerSector)
184 padres[padrow-fpadrow][pad-fpad]=fInnerPRF->GetPRF(dx*fInnerPadPitchWidth,dy*fInnerPadPitchLength);
187 padres[padrow-fpadrow][pad-fpad]=fOuter1PRF->GetPRF(dx*fOuterPadPitchWidth,dy*fOuter1PadPitchLength);}
189 padres[padrow-fpadrow][pad-fpad]=fOuter2PRF->GetPRF(dx*fOuterPadPitchWidth,dy*fOuter2PadPitchLength);}}}
190 //calculate time response function
192 for (time = ftime;time<=ltime;time++)
193 timeres[time-ftime]= fTimeRF->GetRF((-xyz[2]+Float_t(time))*fZWidth);
194 //write over threshold values to stack
195 for (padrow = fpadrow;padrow<=lpadrow;padrow++)
196 for (pad = fpad;pad<=lpad;pad++)
197 for (time = ftime;time<=ltime;time++){
198 cweight = timeres[time-ftime]*padres[padrow-fpadrow][pad-fpad];
199 if (cweight>fResponseThreshold) {
200 fResponseBin[cindex3]=padrow;
201 fResponseBin[cindex3+1]=pad;
202 fResponseBin[cindex3+2]=time;
204 fResponseWeight[cindex]=cweight;
213 void AliTPCParamSR::TransformTo8(Float_t *xyz, Int_t *index) const
216 // transformate point to digit coordinate
218 if (index[0]==0) Transform0to1(xyz,index);
219 if (index[0]==1) Transform1to2(xyz,index);
220 if (index[0]==2) Transform2to3(xyz,index);
221 if (index[0]==3) Transform3to4(xyz,index);
222 if (index[0]==4) Transform4to8(xyz,index);
225 void AliTPCParamSR::TransformTo2(Float_t *xyz, Int_t *index) const
228 //transformate point to rotated coordinate
231 if (index[0]==0) Transform0to1(xyz,index);
232 if (index[0]==1) Transform1to2(xyz,index);
233 if (index[0]==4) Transform4to3(xyz,index);
234 if (index[0]==8) { //if we are in digit coordinate system transform to global
235 Transform8to4(xyz,index);
236 Transform4to3(xyz,index);
240 void AliTPCParamSR::CRXYZtoXYZ(Float_t *xyz,
241 const Int_t §or, const Int_t & padrow, Int_t option) const
243 //transform relative coordinates to absolute
244 Bool_t rel = ( (option&2)!=0);
245 Int_t index[2]={sector,padrow};
246 if (rel==kTRUE) Transform4to3(xyz,index);//if the position is relative to pad row
247 Transform2to1(xyz,index);
250 void AliTPCParamSR::XYZtoCRXYZ(Float_t *xyz,
251 Int_t §or, Int_t & padrow, Int_t option) const
253 //transform global position to the position relative to the sector padrow
254 //if option=0 X calculate absolute calculate sector
255 //if option=1 X absolute use input sector
256 //if option=2 X relative to pad row calculate sector
257 //if option=3 X relative use input sector
258 //!!!!!!!!! WE start to calculate rows from row = 0
260 Bool_t rel = ( (option&2)!=0);
262 //option 0 and 2 means that we don't have information about sector
263 if ((option&1)==0) Transform0to1(xyz,index); //we calculate sector number
266 Transform1to2(xyz,index);
267 Transform2to3(xyz,index);
268 //if we store relative position calculate position relative to pad row
269 if (rel==kTRUE) Transform3to4(xyz,index);
274 Float_t AliTPCParamSR::GetPrimaryLoss(Float_t *x, Int_t *index, Float_t *angle)
278 Float_t padlength=GetPadPitchLength(index[1]);
279 Float_t a1=TMath::Sin(angle[0]);
281 Float_t a2=TMath::Sin(angle[1]);
283 Float_t length =padlength*TMath::Sqrt(1+a1+a2);
284 return length*fNPrimLoss;
287 Float_t AliTPCParamSR::GetTotalLoss(Float_t *x, Int_t *index, Float_t *angle)
291 Float_t padlength=GetPadPitchLength(index[1]);
292 Float_t a1=TMath::Sin(angle[0]);
294 Float_t a2=TMath::Sin(angle[1]);
296 Float_t length =padlength*TMath::Sqrt(1+a1+a2);
297 return length*fNTotalLoss;
302 void AliTPCParamSR::GetClusterSize(Float_t *x, Int_t *index, Float_t *angle, Int_t mode, Float_t *sigma)
305 //return cluster sigma2 (x,y) for particle at position x
306 // in this case x coordinata is in drift direction
307 //and y in pad row direction
308 //we suppose that input coordinate system is digit system
311 Float_t lx[3] = {x[0],x[1],x[2]};
312 Int_t li[3] = {index[0],index[1],index[2]};
314 // Float_t sigmadiff;
318 xx = lx[2]; //calculate drift length in cm
320 sigma[0]+= xx*GetDiffL()*GetDiffL();
321 sigma[1]+= xx*GetDiffT()*GetDiffT();
325 //sigma[0]=sigma[1]=0;
326 if (GetTimeRF()!=0) sigma[0]+=GetTimeRF()->GetSigma()*GetTimeRF()->GetSigma();
327 if ( (index[1]<fNInnerSector) &&(GetInnerPRF()!=0))
328 sigma[1]+=GetInnerPRF()->GetSigmaX()*GetInnerPRF()->GetSigmaX();
329 if ( (index[1]>=fNInnerSector) &&(index[2]<fNRowUp1) && (GetOuter1PRF()!=0))
330 sigma[1]+=GetOuter1PRF()->GetSigmaX()*GetOuter1PRF()->GetSigmaX();
331 if( (index[1]>=fNInnerSector) &&(index[2]>=fNRowUp1) && (GetOuter2PRF()!=0))
332 sigma[1]+=GetOuter2PRF()->GetSigmaX()*GetOuter2PRF()->GetSigmaX();
335 sigma[0]/= GetZWidth()*GetZWidth();
336 sigma[1]/=GetPadPitchWidth(index[0])*GetPadPitchWidth(index[0]);
342 void AliTPCParamSR::GetSpaceResolution(Float_t *x, Int_t *index, Float_t *angle,
343 Float_t amplitude, Int_t mode, Float_t *sigma)
350 Float_t AliTPCParamSR::GetAmp(Float_t *x, Int_t *index, Float_t *angle)
358 Float_t * AliTPCParamSR::GetAnglesAccMomentum(Float_t *x, Int_t * index, Float_t* momentum, Float_t *angle)
361 //calculate angle of track to padrow at given position
362 // for given magnetic field and momentum of the particle
365 TransformTo2(x,index);
366 AliDetectorParam::GetAnglesAccMomentum(x,index,momentum,angle);
367 Float_t addangle = TMath::ASin(x[1]/GetPadRowRadii(index[1],index[2]));
373 Bool_t AliTPCParamSR::Update()
376 if (AliTPCParam::Update()==kFALSE) return kFALSE;
379 Float_t firstrow = fInnerRadiusLow + 2.225 ;
380 for( i= 0;i<fNRowLow;i++)
382 Float_t x = firstrow + fInnerPadPitchLength*(Float_t)i;
384 // number of pads per row
385 Float_t y = (x-0.5*fInnerPadPitchLength)*tan(fInnerAngle/2.)-fInnerWireMount-
386 fInnerPadPitchWidth/2.;
387 // 0 and fNRowLow+1 reserved for cross talk rows
388 fYInner[i+1] = x*tan(fInnerAngle/2.)-fInnerWireMount;
389 fNPadsLow[i] = 1+2*(Int_t)(y/fInnerPadPitchWidth) ;
392 fYInner[0]=(fPadRowLow[0]-fInnerPadPitchLength)*tan(fInnerAngle/2.)-fInnerWireMount;
393 fYInner[fNRowLow+1]=(fPadRowLow[fNRowLow-1]+fInnerPadPitchLength)*tan(fInnerAngle/2.)-fInnerWireMount;
394 firstrow = fOuterRadiusLow + 1.6;
395 for(i=0;i<fNRowUp;i++)
398 Float_t x = firstrow + fOuter1PadPitchLength*(Float_t)i;
400 Float_t y =(x-0.5*fOuter1PadPitchLength)*tan(fOuterAngle/2.)-fOuterWireMount-
401 fOuterPadPitchWidth/2.;
402 fYOuter[i+1]= x*tan(fOuterAngle/2.)-fOuterWireMount;
403 fNPadsUp[i] = 1+2*(Int_t)(y/fOuterPadPitchWidth) ;
405 fLastWireUp1=fPadRowUp[i] +0.375;
406 firstrow = fPadRowUp[i] + 0.5*(fOuter1PadPitchLength+fOuter2PadPitchLength);
411 Float_t x = firstrow + fOuter2PadPitchLength*(Float_t)(i-64);
413 Float_t y =(x-0.5*fOuter2PadPitchLength)*tan(fOuterAngle/2.)-fOuterWireMount-
414 fOuterPadPitchWidth/2.;
415 fNPadsUp[i] = 1+2*(Int_t)(y/fOuterPadPitchWidth) ;
417 fYOuter[i+1] = fPadRowUp[i]*tan(fOuterAngle/2.)-fOuterWireMount;
420 fYOuter[0]=(fPadRowUp[0]-fOuter1PadPitchLength)*tan(fOuterAngle/2.)-fOuterWireMount;
421 fYOuter[fNRowUp+1]=(fPadRowUp[fNRowUp-1]+fOuter2PadPitchLength)*tan(fOuterAngle/2.)-fOuterWireMount;
422 fNtRows = fNInnerSector*fNRowLow+fNOuterSector*fNRowUp;
426 Float_t AliTPCParamSR::GetYInner(Int_t irow) const
428 return fYInner[irow];
430 Float_t AliTPCParamSR::GetYOuter(Int_t irow) const
432 return fYOuter[irow];
435 void AliTPCParamSR::Streamer(TBuffer &R__b)
437 // Stream an object of class AliTPC.
439 if (R__b.IsReading()) {
440 Version_t R__v = R__b.ReadVersion(); if (R__v) { }
441 // TObject::Streamer(R__b);
442 AliTPCParam::Streamer(R__b);
443 // if (R__v < 2) return;
446 R__b.WriteVersion(AliTPCParamSR::IsA());
447 //TObject::Streamer(R__b);
448 AliTPCParam::Streamer(R__b);
451 Int_t AliTPCParamSR::CalcResponseFast(Float_t* xyz, Int_t * index, Int_t row)
454 //calculate bin response as function of the input position -x
455 //return number of valid response bin
457 //we suppose that coordinate is expressed in float digits
458 // it's mean coordinate system 8
459 //xyz[0] - electron position w.r.t. pad center, normalized to pad length,
460 //xyz[1] is float pad (center pad is number 0) and xyz[2] is float time bin
461 if ( (fInnerPRF==0)||(fOuter1PRF==0)||(fOuter2PRF==0) ||(fTimeRF==0) ){
462 Error("AliTPCParamSR", "response function was not adjusted");
466 const Int_t padn = 500;
467 const Float_t fpadn = 500.;
468 const Int_t timen = 500;
469 const Float_t ftimen = 500.;
470 const Int_t padrn = 500;
471 const Float_t fpadrn = 500.;
475 static Float_t prfinner[2*padrn][5*padn]; //pad divided by 50
476 static Float_t prfouter1[2*padrn][5*padn]; //prfouter division
477 static Float_t prfouter2[2*padrn][5*padn];
479 static Float_t rftime[5*timen]; //time division
480 static Int_t blabla=0;
481 static Float_t zoffset=0;
482 static Float_t zwidth=0;
483 static Float_t zoffset2=0;
484 static TH1F * hdiff=0;
485 static TH1F * hdiff1=0;
486 static TH1F * hdiff2=0;
488 if (blabla==0) { //calculate Response function - only at the begginning
489 hdiff =new TH1F("prf_diff","prf_diff",10000,-1,1);
490 hdiff1 =new TH1F("no_repsonse1","no_response1",10000,-1,1);
491 hdiff2 =new TH1F("no_response2","no_response2",10000,-1,1);
494 zoffset = GetZOffset();
496 zoffset2 = zoffset/zwidth;
497 for (Int_t i=0;i<5*timen;i++){
498 rftime[i] = fTimeRF->GetRF(((i-2.5*ftimen)/ftimen)*zwidth+zoffset);
500 for (Int_t i=0;i<5*padn;i++){
501 for (Int_t j=0;j<2*padrn;j++){
503 fInnerPRF->GetPRF((i-2.5*fpadn)/fpadn
504 *fInnerPadPitchWidth,(j-fpadrn)/fpadrn*fInnerPadPitchLength);
506 fOuter1PRF->GetPRF((i-2.5*fpadn)/fpadn
507 *fOuterPadPitchWidth,(j-fpadrn)/fpadrn*fOuter1PadPitchLength);
511 fOuter2PRF->GetPRF((i-2.5*fpadn)/fpadn
512 *fOuterPadPitchWidth,(j-fpadrn)/fpadrn*fOuter2PadPitchLength);
515 } // the above is calculated only once
517 // calculate central padrow, pad, time
518 Int_t npads = GetNPads(index[1],index[3]-1);
519 Int_t cpadrow = index[2]; // electrons are here
520 Int_t cpad = TMath::Nint(xyz[1]);
521 Int_t ctime = TMath::Nint(xyz[2]+zoffset2);
523 Float_t dpadrow = xyz[0];
524 Float_t dpad = xyz[1]-cpad;
525 Float_t dtime = xyz[2]+zoffset2-ctime;
528 Int_t maxt =GetMaxTBin();
533 if (row>=0) { //if we are interesting about given pad row
534 fpadrow = row-cpadrow;
535 lpadrow = row-cpadrow;
537 fpadrow = (index[2]>1) ? -1 :0;
538 lpadrow = (index[2]<GetNRow(index[1])-1) ? 1:0;
540 Int_t fpad = (cpad > -npads/2+1) ? -2: -npads/2-cpad;
541 Int_t lpad = (cpad < npads/2-1) ? 2: npads/2-cpad;
542 Int_t ftime = (ctime>1) ? -2: -ctime;
543 Int_t ltime = (ctime<maxt-2) ? 2: maxt-ctime-1;
545 // cross talk from long pad to short one
546 if(row==fNRowUp1 && fpadrow==-1) {
547 dpadrow *= fOuter2PadPitchLength;
548 dpadrow += fOuterWWPitch;
549 dpadrow /= fOuter1PadPitchLength;
551 // cross talk from short pad to long one
552 if(row==fNRowUp1+1 && fpadrow==1){
553 dpadrow *= fOuter1PadPitchLength;
554 if(dpadrow < 0.) dpadrow = -1.; //protection against 3rd wire
555 dpadrow += fOuterWWPitch;
556 dpadrow /= fOuter2PadPitchLength;
560 Int_t apadrow = TMath::Nint((dpadrow-fpadrow)*fpadrn+fpadrn);
561 for (Int_t ipadrow = fpadrow; ipadrow<=lpadrow;ipadrow++){
562 if ( (apadrow<0) || (apadrow>=2*padrn))
564 Int_t apad= TMath::Nint((dpad-fpad)*fpadn+2.5*fpadn);
565 for (Int_t ipad = fpad; ipad<=lpad;ipad++){
567 if (index[1]<fNInnerSector)
568 cweight=prfinner[apadrow][apad];
571 cweight=prfouter1[apadrow][apad];
572 else cweight=prfouter2[apadrow][apad];
575 // if (cweight<fResponseThreshold) continue;
576 Int_t atime = TMath::Nint((dtime-ftime)*ftimen+2.5*ftimen);
577 for (Int_t itime = ftime;itime<=ltime;itime++){
578 Float_t cweight2 = cweight*rftime[atime];
579 if (cweight2>fResponseThreshold) {
580 fResponseBin[cindex3++]=cpadrow+ipadrow;
581 fResponseBin[cindex3++]=cpad+ipad;
582 fResponseBin[cindex3++]=ctime+itime;
583 fResponseWeight[cindex++]=cweight2;
587 printf("Pici pici %d %f %d\n",ipad,dpad,apad);