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 1.10 2002/10/14 14:57:43 hristov
19 Merging the VirtualMC branch to the main development branch (HEAD)
21 Revision 1.7.4.1 2002/07/24 10:09:01 alibrary
24 Revision 1.9 2002/06/07 06:13:07 kowal2
25 Corrected calculation of the cross talk in the outer sectors
27 Revision 1.8 2002/06/05 15:37:31 kowal2
28 Added cross-talk from the wires beyond the first and the last rows
30 Revision 1.7 2002/03/18 17:59:13 kowal2
31 Chnges in the pad geometry - 3 pad lengths introduced.
33 Revision 1.6 2002/02/25 11:02:56 kowal2
34 Changes towards speeding up the code. Thanks to Marian Ivanov.
36 Revision 1.5 2001/12/06 07:49:30 kowal2
37 corrected number of pads calculation
39 Revision 1.4 2000/11/02 07:33:15 kowal2
40 Improvements of the code.
42 Revision 1.3 2000/06/30 12:07:50 kowal2
43 Updated from the TPC-PreRelease branch
45 Revision 1.2.4.2 2000/06/14 16:48:24 kowal2
46 Parameter setting improved. Removed compiler warnings
48 Revision 1.2.4.1 2000/06/09 07:55:39 kowal2
52 Revision 1.2 2000/04/17 09:37:33 kowal2
53 removed obsolete AliTPCDigitsDisplay.C
55 Revision 1.1.4.2 2000/04/10 11:36:13 kowal2
57 New Detector parameters handling class
61 ///////////////////////////////////////////////////////////////////////
62 // Manager and of geomety classes for set: TPC //
64 // !sectors are numbered from 0 //
65 // !pad rows are numbered from 0 //
67 // 27.7. - AliTPCPaaramSr object for TPC
68 // TPC with straight pad rows
69 // Origin: Marian Ivanov, Uni. of Bratislava, ivanov@fmph.uniba.sk //
71 ///////////////////////////////////////////////////////////////////////
74 #include <Riostream.h>
77 #include <AliTPCParamSR.h>
78 #include "AliTPCPRF2D.h"
79 #include "AliTPCRF1D.h"
83 ClassImp(AliTPCParamSR)
84 const static Int_t kMaxRows=600;
85 const static Float_t kEdgeSectorSpace = 2.5;
86 const static Float_t kFacSigmaPadRow=3.;
87 const static Float_t kFacSigmaPad=3.;
88 const static Float_t kFacSigmaTime=3.;
91 AliTPCParamSR::AliTPCParamSR()
94 //constructor set the default parameters
99 fFacSigmaPadRow = Float_t(kFacSigmaPadRow);
100 fFacSigmaPad = Float_t(kFacSigmaPad);
101 fFacSigmaTime = Float_t(kFacSigmaTime);
106 AliTPCParamSR::~AliTPCParamSR()
109 //destructor destroy some dynmicaly alocated variables
110 if (fInnerPRF != 0) delete fInnerPRF;
111 if (fOuter1PRF != 0) delete fOuter1PRF;
112 if (fOuter2PRF != 0) delete fOuter2PRF;
113 if (fTimeRF != 0) delete fTimeRF;
116 void AliTPCParamSR::SetDefault()
118 //set default TPC param
120 AliTPCParam::SetDefault();
123 Int_t AliTPCParamSR::CalcResponse(Float_t* xyz, Int_t * index, Int_t row)
126 //calculate bin response as function of the input position -x
127 //return number of valid response bin
129 //we suppose that coordinate is expressed in float digits
130 // it's mean coordinate system 8
131 //xyz[0] - float padrow xyz[1] is float pad (center pad is number 0) and xyz[2] is float time bin
132 if ( (fInnerPRF==0)||(fOuter1PRF==0)||(fOuter2PRF==0) ||(fTimeRF==0) ){
133 Error("AliTPCParamSR", "response function was not adjusted");
137 Float_t sfpadrow; // sigma of response function
138 Float_t sfpad; // sigma of
139 Float_t sftime= fFacSigmaTime*fTimeRF->GetSigma()/fZWidth; //3 sigma of time response
140 if (index[1]<fNInnerSector){
141 sfpadrow =fFacSigmaPadRow*fInnerPRF->GetSigmaY()/fInnerPadPitchLength;
142 sfpad =fFacSigmaPad*fInnerPRF->GetSigmaX()/fInnerPadPitchWidth;
146 sfpadrow =fFacSigmaPadRow*fOuter1PRF->GetSigmaY()/fOuter1PadPitchLength;
147 sfpad =fFacSigmaPad*fOuter1PRF->GetSigmaX()/fOuterPadPitchWidth;}
149 sfpadrow =fFacSigmaPadRow*fOuter2PRF->GetSigmaY()/fOuter2PadPitchLength;
150 sfpad =fFacSigmaPad*fOuter2PRF->GetSigmaX()/fOuterPadPitchWidth;
154 Int_t fpadrow = TMath::Max(TMath::Nint(index[2]+xyz[0]-sfpadrow),0); //"first" padrow
155 Int_t fpad = TMath::Nint(xyz[1]-sfpad); //first pad
156 Int_t ftime = TMath::Max(TMath::Nint(xyz[2]+GetZOffset()/GetZWidth()-sftime),0); // first time
157 Int_t lpadrow = TMath::Min(TMath::Nint(index[2]+xyz[0]+sfpadrow),fpadrow+19); //"last" padrow
158 lpadrow = TMath::Min(GetNRow(index[1])-1,lpadrow);
159 Int_t lpad = TMath::Min(TMath::Nint(xyz[1]+sfpad),fpad+19); //last pad
160 Int_t ltime = TMath::Min(TMath::Nint(xyz[2]+GetZOffset()/GetZWidth()+sftime),ftime+19); // last time
161 ltime = TMath::Min(ltime,GetMaxTBin()-1);
163 Int_t npads = GetNPads(index[1],row);
168 if (ftime<0) ftime=0;
170 if (row>=0) { //if we are interesting about given pad row
171 if (fpadrow<=row) fpadrow =row;
174 if (lpadrow>=row) lpadrow = row;
180 Float_t padres[20][20]; //I don't expect bigger number of bins
186 //calculate padresponse function
188 for (padrow = fpadrow;padrow<=lpadrow;padrow++)
189 for (pad = fpad;pad<=lpad;pad++){
190 Float_t dy = (xyz[0]+Float_t(index[2]-padrow));
191 Float_t dx = (xyz[1]+Float_t(pad));
192 if (index[1]<fNInnerSector)
193 padres[padrow-fpadrow][pad-fpad]=fInnerPRF->GetPRF(dx*fInnerPadPitchWidth,dy*fInnerPadPitchLength);
196 padres[padrow-fpadrow][pad-fpad]=fOuter1PRF->GetPRF(dx*fOuterPadPitchWidth,dy*fOuter1PadPitchLength);}
198 padres[padrow-fpadrow][pad-fpad]=fOuter2PRF->GetPRF(dx*fOuterPadPitchWidth,dy*fOuter2PadPitchLength);}}}
199 //calculate time response function
201 for (time = ftime;time<=ltime;time++)
202 timeres[time-ftime]= fTimeRF->GetRF((-xyz[2]+Float_t(time))*fZWidth);
203 //write over threshold values to stack
204 for (padrow = fpadrow;padrow<=lpadrow;padrow++)
205 for (pad = fpad;pad<=lpad;pad++)
206 for (time = ftime;time<=ltime;time++){
207 cweight = timeres[time-ftime]*padres[padrow-fpadrow][pad-fpad];
208 if (cweight>fResponseThreshold) {
209 fResponseBin[cindex3]=padrow;
210 fResponseBin[cindex3+1]=pad;
211 fResponseBin[cindex3+2]=time;
213 fResponseWeight[cindex]=cweight;
222 void AliTPCParamSR::TransformTo8(Float_t *xyz, Int_t *index) const
225 // transformate point to digit coordinate
227 if (index[0]==0) Transform0to1(xyz,index);
228 if (index[0]==1) Transform1to2(xyz,index);
229 if (index[0]==2) Transform2to3(xyz,index);
230 if (index[0]==3) Transform3to4(xyz,index);
231 if (index[0]==4) Transform4to8(xyz,index);
234 void AliTPCParamSR::TransformTo2(Float_t *xyz, Int_t *index) const
237 //transformate point to rotated coordinate
240 if (index[0]==0) Transform0to1(xyz,index);
241 if (index[0]==1) Transform1to2(xyz,index);
242 if (index[0]==4) Transform4to3(xyz,index);
243 if (index[0]==8) { //if we are in digit coordinate system transform to global
244 Transform8to4(xyz,index);
245 Transform4to3(xyz,index);
249 void AliTPCParamSR::CRXYZtoXYZ(Float_t *xyz,
250 const Int_t §or, const Int_t & padrow, Int_t option) const
252 //transform relative coordinates to absolute
253 Bool_t rel = ( (option&2)!=0);
254 Int_t index[2]={sector,padrow};
255 if (rel==kTRUE) Transform4to3(xyz,index);//if the position is relative to pad row
256 Transform2to1(xyz,index);
259 void AliTPCParamSR::XYZtoCRXYZ(Float_t *xyz,
260 Int_t §or, Int_t & padrow, Int_t option) const
262 //transform global position to the position relative to the sector padrow
263 //if option=0 X calculate absolute calculate sector
264 //if option=1 X absolute use input sector
265 //if option=2 X relative to pad row calculate sector
266 //if option=3 X relative use input sector
267 //!!!!!!!!! WE start to calculate rows from row = 0
269 Bool_t rel = ( (option&2)!=0);
271 //option 0 and 2 means that we don't have information about sector
272 if ((option&1)==0) Transform0to1(xyz,index); //we calculate sector number
275 Transform1to2(xyz,index);
276 Transform2to3(xyz,index);
277 //if we store relative position calculate position relative to pad row
278 if (rel==kTRUE) Transform3to4(xyz,index);
283 Float_t AliTPCParamSR::GetPrimaryLoss(Float_t *x, Int_t *index, Float_t *angle)
287 Float_t padlength=GetPadPitchLength(index[1]);
288 Float_t a1=TMath::Sin(angle[0]);
290 Float_t a2=TMath::Sin(angle[1]);
292 Float_t length =padlength*TMath::Sqrt(1+a1+a2);
293 return length*fNPrimLoss;
296 Float_t AliTPCParamSR::GetTotalLoss(Float_t *x, Int_t *index, Float_t *angle)
300 Float_t padlength=GetPadPitchLength(index[1]);
301 Float_t a1=TMath::Sin(angle[0]);
303 Float_t a2=TMath::Sin(angle[1]);
305 Float_t length =padlength*TMath::Sqrt(1+a1+a2);
306 return length*fNTotalLoss;
311 void AliTPCParamSR::GetClusterSize(Float_t *x, Int_t *index, Float_t *angle, Int_t mode, Float_t *sigma)
314 //return cluster sigma2 (x,y) for particle at position x
315 // in this case x coordinata is in drift direction
316 //and y in pad row direction
317 //we suppose that input coordinate system is digit system
320 Float_t lx[3] = {x[0],x[1],x[2]};
321 Int_t li[3] = {index[0],index[1],index[2]};
323 // Float_t sigmadiff;
327 xx = lx[2]; //calculate drift length in cm
329 sigma[0]+= xx*GetDiffL()*GetDiffL();
330 sigma[1]+= xx*GetDiffT()*GetDiffT();
334 //sigma[0]=sigma[1]=0;
335 if (GetTimeRF()!=0) sigma[0]+=GetTimeRF()->GetSigma()*GetTimeRF()->GetSigma();
336 if ( (index[1]<fNInnerSector) &&(GetInnerPRF()!=0))
337 sigma[1]+=GetInnerPRF()->GetSigmaX()*GetInnerPRF()->GetSigmaX();
338 if ( (index[1]>=fNInnerSector) &&(index[2]<fNRowUp1) && (GetOuter1PRF()!=0))
339 sigma[1]+=GetOuter1PRF()->GetSigmaX()*GetOuter1PRF()->GetSigmaX();
340 if( (index[1]>=fNInnerSector) &&(index[2]>=fNRowUp1) && (GetOuter2PRF()!=0))
341 sigma[1]+=GetOuter2PRF()->GetSigmaX()*GetOuter2PRF()->GetSigmaX();
344 sigma[0]/= GetZWidth()*GetZWidth();
345 sigma[1]/=GetPadPitchWidth(index[0])*GetPadPitchWidth(index[0]);
351 void AliTPCParamSR::GetSpaceResolution(Float_t *x, Int_t *index, Float_t *angle,
352 Float_t amplitude, Int_t mode, Float_t *sigma)
359 Float_t AliTPCParamSR::GetAmp(Float_t *x, Int_t *index, Float_t *angle)
367 Float_t * AliTPCParamSR::GetAnglesAccMomentum(Float_t *x, Int_t * index, Float_t* momentum, Float_t *angle)
370 //calculate angle of track to padrow at given position
371 // for given magnetic field and momentum of the particle
374 TransformTo2(x,index);
375 AliDetectorParam::GetAnglesAccMomentum(x,index,momentum,angle);
376 Float_t addangle = TMath::ASin(x[1]/GetPadRowRadii(index[1],index[2]));
382 Bool_t AliTPCParamSR::Update()
385 if (AliTPCParam::Update()==kFALSE) return kFALSE;
388 Float_t firstrow = fInnerRadiusLow + 2.225 ;
389 for( i= 0;i<fNRowLow;i++)
391 Float_t x = firstrow + fInnerPadPitchLength*(Float_t)i;
393 // number of pads per row
394 Float_t y = (x-0.5*fInnerPadPitchLength)*tan(fInnerAngle/2.)-fInnerWireMount-
395 fInnerPadPitchWidth/2.;
396 // 0 and fNRowLow+1 reserved for cross talk rows
397 fYInner[i+1] = x*tan(fInnerAngle/2.)-fInnerWireMount;
398 fNPadsLow[i] = 1+2*(Int_t)(y/fInnerPadPitchWidth) ;
401 fYInner[0]=(fPadRowLow[0]-fInnerPadPitchLength)*tan(fInnerAngle/2.)-fInnerWireMount;
402 fYInner[fNRowLow+1]=(fPadRowLow[fNRowLow-1]+fInnerPadPitchLength)*tan(fInnerAngle/2.)-fInnerWireMount;
403 firstrow = fOuterRadiusLow + 1.6;
404 for(i=0;i<fNRowUp;i++)
407 Float_t x = firstrow + fOuter1PadPitchLength*(Float_t)i;
409 Float_t y =(x-0.5*fOuter1PadPitchLength)*tan(fOuterAngle/2.)-fOuterWireMount-
410 fOuterPadPitchWidth/2.;
411 fYOuter[i+1]= x*tan(fOuterAngle/2.)-fOuterWireMount;
412 fNPadsUp[i] = 1+2*(Int_t)(y/fOuterPadPitchWidth) ;
414 fLastWireUp1=fPadRowUp[i] +0.375;
415 firstrow = fPadRowUp[i] + 0.5*(fOuter1PadPitchLength+fOuter2PadPitchLength);
420 Float_t x = firstrow + fOuter2PadPitchLength*(Float_t)(i-64);
422 Float_t y =(x-0.5*fOuter2PadPitchLength)*tan(fOuterAngle/2.)-fOuterWireMount-
423 fOuterPadPitchWidth/2.;
424 fNPadsUp[i] = 1+2*(Int_t)(y/fOuterPadPitchWidth) ;
426 fYOuter[i+1] = fPadRowUp[i]*tan(fOuterAngle/2.)-fOuterWireMount;
429 fYOuter[0]=(fPadRowUp[0]-fOuter1PadPitchLength)*tan(fOuterAngle/2.)-fOuterWireMount;
430 fYOuter[fNRowUp+1]=(fPadRowUp[fNRowUp-1]+fOuter2PadPitchLength)*tan(fOuterAngle/2.)-fOuterWireMount;
431 fNtRows = fNInnerSector*fNRowLow+fNOuterSector*fNRowUp;
435 Float_t AliTPCParamSR::GetYInner(Int_t irow) const
437 return fYInner[irow];
439 Float_t AliTPCParamSR::GetYOuter(Int_t irow) const
441 return fYOuter[irow];
444 void AliTPCParamSR::Streamer(TBuffer &R__b)
446 // Stream an object of class AliTPC.
448 if (R__b.IsReading()) {
449 Version_t R__v = R__b.ReadVersion(); if (R__v) { }
450 // TObject::Streamer(R__b);
451 AliTPCParam::Streamer(R__b);
452 // if (R__v < 2) return;
455 R__b.WriteVersion(AliTPCParamSR::IsA());
456 //TObject::Streamer(R__b);
457 AliTPCParam::Streamer(R__b);
460 Int_t AliTPCParamSR::CalcResponseFast(Float_t* xyz, Int_t * index, Int_t row)
463 //calculate bin response as function of the input position -x
464 //return number of valid response bin
466 //we suppose that coordinate is expressed in float digits
467 // it's mean coordinate system 8
468 //xyz[0] - electron position w.r.t. pad center, normalized to pad length,
469 //xyz[1] is float pad (center pad is number 0) and xyz[2] is float time bin
470 if ( (fInnerPRF==0)||(fOuter1PRF==0)||(fOuter2PRF==0) ||(fTimeRF==0) ){
471 Error("AliTPCParamSR", "response function was not adjusted");
475 const Int_t padn = 500;
476 const Float_t fpadn = 500.;
477 const Int_t timen = 500;
478 const Float_t ftimen = 500.;
479 const Int_t padrn = 500;
480 const Float_t fpadrn = 500.;
484 static Float_t prfinner[2*padrn][5*padn]; //pad divided by 50
485 static Float_t prfouter1[2*padrn][5*padn]; //prfouter division
486 static Float_t prfouter2[2*padrn][5*padn];
488 static Float_t rftime[5*timen]; //time division
489 static Int_t blabla=0;
490 static Float_t zoffset=0;
491 static Float_t zwidth=0;
492 static Float_t zoffset2=0;
493 static TH1F * hdiff=0;
494 static TH1F * hdiff1=0;
495 static TH1F * hdiff2=0;
497 if (blabla==0) { //calculate Response function - only at the begginning
498 hdiff =new TH1F("prf_diff","prf_diff",10000,-1,1);
499 hdiff1 =new TH1F("no_repsonse1","no_response1",10000,-1,1);
500 hdiff2 =new TH1F("no_response2","no_response2",10000,-1,1);
503 zoffset = GetZOffset();
505 zoffset2 = zoffset/zwidth;
506 for (Int_t i=0;i<5*timen;i++){
507 rftime[i] = fTimeRF->GetRF(((i-2.5*ftimen)/ftimen)*zwidth+zoffset);
509 for (Int_t i=0;i<5*padn;i++){
510 for (Int_t j=0;j<2*padrn;j++){
512 fInnerPRF->GetPRF((i-2.5*fpadn)/fpadn
513 *fInnerPadPitchWidth,(j-fpadrn)/fpadrn*fInnerPadPitchLength);
515 fOuter1PRF->GetPRF((i-2.5*fpadn)/fpadn
516 *fOuterPadPitchWidth,(j-fpadrn)/fpadrn*fOuter1PadPitchLength);
520 fOuter2PRF->GetPRF((i-2.5*fpadn)/fpadn
521 *fOuterPadPitchWidth,(j-fpadrn)/fpadrn*fOuter2PadPitchLength);
524 } // the above is calculated only once
526 // calculate central padrow, pad, time
527 Int_t npads = GetNPads(index[1],index[3]-1);
528 Int_t cpadrow = index[2]; // electrons are here
529 Int_t cpad = TMath::Nint(xyz[1]);
530 Int_t ctime = TMath::Nint(xyz[2]+zoffset2);
532 Float_t dpadrow = xyz[0];
533 Float_t dpad = xyz[1]-cpad;
534 Float_t dtime = xyz[2]+zoffset2-ctime;
537 Int_t maxt =GetMaxTBin();
542 if (row>=0) { //if we are interesting about given pad row
543 fpadrow = row-cpadrow;
544 lpadrow = row-cpadrow;
546 fpadrow = (index[2]>1) ? -1 :0;
547 lpadrow = (index[2]<GetNRow(index[1])-1) ? 1:0;
549 Int_t fpad = (cpad > -npads/2+1) ? -2: -npads/2-cpad;
550 Int_t lpad = (cpad < npads/2-1) ? 2: npads/2-cpad;
551 Int_t ftime = (ctime>1) ? -2: -ctime;
552 Int_t ltime = (ctime<maxt-2) ? 2: maxt-ctime-1;
554 // cross talk from long pad to short one
555 if(row==fNRowUp1 && fpadrow==-1) {
556 dpadrow *= fOuter2PadPitchLength;
557 dpadrow += fOuterWWPitch;
558 dpadrow /= fOuter1PadPitchLength;
560 // cross talk from short pad to long one
561 if(row==fNRowUp1+1 && fpadrow==1){
562 dpadrow *= fOuter1PadPitchLength;
563 if(dpadrow < 0.) dpadrow = -1.; //protection against 3rd wire
564 dpadrow += fOuterWWPitch;
565 dpadrow /= fOuter2PadPitchLength;
569 Int_t apadrow = TMath::Nint((dpadrow-fpadrow)*fpadrn+fpadrn);
570 for (Int_t ipadrow = fpadrow; ipadrow<=lpadrow;ipadrow++){
571 if ( (apadrow<0) || (apadrow>=2*padrn))
573 Int_t apad= TMath::Nint((dpad-fpad)*fpadn+2.5*fpadn);
574 for (Int_t ipad = fpad; ipad<=lpad;ipad++){
576 if (index[1]<fNInnerSector)
577 cweight=prfinner[apadrow][apad];
580 cweight=prfouter1[apadrow][apad];
581 else cweight=prfouter2[apadrow][apad];
584 // if (cweight<fResponseThreshold) continue;
585 Int_t atime = TMath::Nint((dtime-ftime)*ftimen+2.5*ftimen);
586 for (Int_t itime = ftime;itime<=ltime;itime++){
587 Float_t cweight2 = cweight*rftime[atime];
588 if (cweight2>fResponseThreshold) {
589 fResponseBin[cindex3++]=cpadrow+ipadrow;
590 fResponseBin[cindex3++]=cpad+ipad;
591 fResponseBin[cindex3++]=ctime+itime;
592 fResponseWeight[cindex++]=cweight2;
596 printf("Pici pici %d %f %d\n",ipad,dpad,apad);