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"
38 ClassImp(AliTPCParamSR)
39 static const Int_t kMaxRows=600;
40 static const Float_t kEdgeSectorSpace = 2.5;
41 static const Float_t kFacSigmaPadRow=3.;
42 static const Float_t kFacSigmaPad=3.;
43 static const Float_t kFacSigmaTime=3.;
46 AliTPCParamSR::AliTPCParamSR()
49 //constructor set the default parameters
54 fFacSigmaPadRow = Float_t(kFacSigmaPadRow);
55 fFacSigmaPad = Float_t(kFacSigmaPad);
56 fFacSigmaTime = Float_t(kFacSigmaTime);
61 AliTPCParamSR::~AliTPCParamSR()
64 //destructor destroy some dynmicaly alocated variables
65 if (fInnerPRF != 0) delete fInnerPRF;
66 if (fOuter1PRF != 0) delete fOuter1PRF;
67 if (fOuter2PRF != 0) delete fOuter2PRF;
68 if (fTimeRF != 0) delete fTimeRF;
71 void AliTPCParamSR::SetDefault()
73 //set default TPC param
75 AliTPCParam::SetDefault();
78 Int_t AliTPCParamSR::CalcResponse(Float_t* xyz, Int_t * index, Int_t row)
81 //calculate bin response as function of the input position -x
82 //return number of valid response bin
84 //we suppose that coordinate is expressed in float digits
85 // it's mean coordinate system 8
86 //xyz[0] - float padrow xyz[1] is float pad (center pad is number 0) and xyz[2] is float time bin
87 if ( (fInnerPRF==0)||(fOuter1PRF==0)||(fOuter2PRF==0) ||(fTimeRF==0) ){
88 Error("AliTPCParamSR", "response function was not adjusted");
92 Float_t sfpadrow; // sigma of response function
93 Float_t sfpad; // sigma of
94 Float_t sftime= fFacSigmaTime*fTimeRF->GetSigma()/fZWidth; //3 sigma of time response
95 if (index[1]<fNInnerSector){
96 sfpadrow =fFacSigmaPadRow*fInnerPRF->GetSigmaY()/fInnerPadPitchLength;
97 sfpad =fFacSigmaPad*fInnerPRF->GetSigmaX()/fInnerPadPitchWidth;
101 sfpadrow =fFacSigmaPadRow*fOuter1PRF->GetSigmaY()/fOuter1PadPitchLength;
102 sfpad =fFacSigmaPad*fOuter1PRF->GetSigmaX()/fOuterPadPitchWidth;}
104 sfpadrow =fFacSigmaPadRow*fOuter2PRF->GetSigmaY()/fOuter2PadPitchLength;
105 sfpad =fFacSigmaPad*fOuter2PRF->GetSigmaX()/fOuterPadPitchWidth;
109 Int_t fpadrow = TMath::Max(TMath::Nint(index[2]+xyz[0]-sfpadrow),0); //"first" padrow
110 Int_t fpad = TMath::Nint(xyz[1]-sfpad); //first pad
111 Int_t ftime = TMath::Max(TMath::Nint(xyz[2]+GetZOffset()/GetZWidth()-sftime),0); // first time
112 Int_t lpadrow = TMath::Min(TMath::Nint(index[2]+xyz[0]+sfpadrow),fpadrow+19); //"last" padrow
113 lpadrow = TMath::Min(GetNRow(index[1])-1,lpadrow);
114 Int_t lpad = TMath::Min(TMath::Nint(xyz[1]+sfpad),fpad+19); //last pad
115 Int_t ltime = TMath::Min(TMath::Nint(xyz[2]+GetZOffset()/GetZWidth()+sftime),ftime+19); // last time
116 ltime = TMath::Min(ltime,GetMaxTBin()-1);
118 Int_t npads = GetNPads(index[1],row);
123 if (ftime<0) ftime=0;
125 if (row>=0) { //if we are interesting about given pad row
126 if (fpadrow<=row) fpadrow =row;
129 if (lpadrow>=row) lpadrow = row;
135 Float_t padres[20][20]; //I don't expect bigger number of bins
141 //calculate padresponse function
143 for (padrow = fpadrow;padrow<=lpadrow;padrow++)
144 for (pad = fpad;pad<=lpad;pad++){
145 Float_t dy = (xyz[0]+Float_t(index[2]-padrow));
146 Float_t dx = (xyz[1]+Float_t(pad));
147 if (index[1]<fNInnerSector)
148 padres[padrow-fpadrow][pad-fpad]=fInnerPRF->GetPRF(dx*fInnerPadPitchWidth,dy*fInnerPadPitchLength);
151 padres[padrow-fpadrow][pad-fpad]=fOuter1PRF->GetPRF(dx*fOuterPadPitchWidth,dy*fOuter1PadPitchLength);}
153 padres[padrow-fpadrow][pad-fpad]=fOuter2PRF->GetPRF(dx*fOuterPadPitchWidth,dy*fOuter2PadPitchLength);}}}
154 //calculate time response function
156 for (time = ftime;time<=ltime;time++)
157 timeres[time-ftime]= fTimeRF->GetRF((-xyz[2]+Float_t(time))*fZWidth);
158 //write over threshold values to stack
159 for (padrow = fpadrow;padrow<=lpadrow;padrow++)
160 for (pad = fpad;pad<=lpad;pad++)
161 for (time = ftime;time<=ltime;time++){
162 cweight = timeres[time-ftime]*padres[padrow-fpadrow][pad-fpad];
163 if (cweight>fResponseThreshold) {
164 fResponseBin[cindex3]=padrow;
165 fResponseBin[cindex3+1]=pad;
166 fResponseBin[cindex3+2]=time;
168 fResponseWeight[cindex]=cweight;
177 void AliTPCParamSR::TransformTo8(Float_t *xyz, Int_t *index) const
180 // transformate point to digit coordinate
182 if (index[0]==0) Transform0to1(xyz,index);
183 if (index[0]==1) Transform1to2(xyz,index);
184 if (index[0]==2) Transform2to3(xyz,index);
185 if (index[0]==3) Transform3to4(xyz,index);
186 if (index[0]==4) Transform4to8(xyz,index);
189 void AliTPCParamSR::TransformTo2(Float_t *xyz, Int_t *index) const
192 //transformate point to rotated coordinate
195 if (index[0]==0) Transform0to1(xyz,index);
196 if (index[0]==1) Transform1to2(xyz,index);
197 if (index[0]==4) Transform4to3(xyz,index);
198 if (index[0]==8) { //if we are in digit coordinate system transform to global
199 Transform8to4(xyz,index);
200 Transform4to3(xyz,index);
204 void AliTPCParamSR::CRXYZtoXYZ(Float_t *xyz,
205 const Int_t §or, const Int_t & padrow, Int_t option) const
207 //transform relative coordinates to absolute
208 Bool_t rel = ( (option&2)!=0);
209 Int_t index[2]={sector,padrow};
210 if (rel==kTRUE) Transform4to3(xyz,index);//if the position is relative to pad row
211 Transform2to1(xyz,index);
214 void AliTPCParamSR::XYZtoCRXYZ(Float_t *xyz,
215 Int_t §or, Int_t & padrow, Int_t option) const
217 //transform global position to the position relative to the sector padrow
218 //if option=0 X calculate absolute calculate sector
219 //if option=1 X absolute use input sector
220 //if option=2 X relative to pad row calculate sector
221 //if option=3 X relative use input sector
222 //!!!!!!!!! WE start to calculate rows from row = 0
224 Bool_t rel = ( (option&2)!=0);
226 //option 0 and 2 means that we don't have information about sector
227 if ((option&1)==0) Transform0to1(xyz,index); //we calculate sector number
230 Transform1to2(xyz,index);
231 Transform2to3(xyz,index);
232 //if we store relative position calculate position relative to pad row
233 if (rel==kTRUE) Transform3to4(xyz,index);
238 Float_t AliTPCParamSR::GetPrimaryLoss(Float_t */*x*/, Int_t *index, Float_t *angle)
242 Float_t padlength=GetPadPitchLength(index[1]);
243 Float_t a1=TMath::Sin(angle[0]);
245 Float_t a2=TMath::Sin(angle[1]);
247 Float_t length =padlength*TMath::Sqrt(1+a1+a2);
248 return length*fNPrimLoss;
251 Float_t AliTPCParamSR::GetTotalLoss(Float_t */*x*/, Int_t *index, Float_t *angle)
255 Float_t padlength=GetPadPitchLength(index[1]);
256 Float_t a1=TMath::Sin(angle[0]);
258 Float_t a2=TMath::Sin(angle[1]);
260 Float_t length =padlength*TMath::Sqrt(1+a1+a2);
261 return length*fNTotalLoss;
266 void AliTPCParamSR::GetClusterSize(Float_t *x, Int_t *index, Float_t */*angle*/, Int_t /*mode*/, Float_t *sigma)
269 //return cluster sigma2 (x,y) for particle at position x
270 // in this case x coordinata is in drift direction
271 //and y in pad row direction
272 //we suppose that input coordinate system is digit system
275 Float_t lx[3] = {x[0],x[1],x[2]};
276 Int_t li[3] = {index[0],index[1],index[2]};
278 // Float_t sigmadiff;
282 xx = lx[2]; //calculate drift length in cm
284 sigma[0]+= xx*GetDiffL()*GetDiffL();
285 sigma[1]+= xx*GetDiffT()*GetDiffT();
289 //sigma[0]=sigma[1]=0;
290 if (GetTimeRF()!=0) sigma[0]+=GetTimeRF()->GetSigma()*GetTimeRF()->GetSigma();
291 if ( (index[1]<fNInnerSector) &&(GetInnerPRF()!=0))
292 sigma[1]+=GetInnerPRF()->GetSigmaX()*GetInnerPRF()->GetSigmaX();
293 if ( (index[1]>=fNInnerSector) &&(index[2]<fNRowUp1) && (GetOuter1PRF()!=0))
294 sigma[1]+=GetOuter1PRF()->GetSigmaX()*GetOuter1PRF()->GetSigmaX();
295 if( (index[1]>=fNInnerSector) &&(index[2]>=fNRowUp1) && (GetOuter2PRF()!=0))
296 sigma[1]+=GetOuter2PRF()->GetSigmaX()*GetOuter2PRF()->GetSigmaX();
299 sigma[0]/= GetZWidth()*GetZWidth();
300 sigma[1]/=GetPadPitchWidth(index[0])*GetPadPitchWidth(index[0]);
306 void AliTPCParamSR::GetSpaceResolution(Float_t */*x*/, Int_t */*index*/, Float_t */*angle*/,
307 Float_t /*amplitude*/, Int_t /*mode*/, Float_t */*sigma*/)
314 Float_t AliTPCParamSR::GetAmp(Float_t */*x*/, Int_t */*index*/, Float_t */*angle*/)
322 Float_t * AliTPCParamSR::GetAnglesAccMomentum(Float_t *x, Int_t * index, Float_t* momentum, Float_t *angle)
325 //calculate angle of track to padrow at given position
326 // for given magnetic field and momentum of the particle
329 TransformTo2(x,index);
330 AliDetectorParam::GetAnglesAccMomentum(x,index,momentum,angle);
331 Float_t addangle = TMath::ASin(x[1]/GetPadRowRadii(index[1],index[2]));
337 Bool_t AliTPCParamSR::Update()
340 if (AliTPCParam::Update()==kFALSE) return kFALSE;
343 Float_t firstrow = fInnerRadiusLow + 2.225 ;
344 for( i= 0;i<fNRowLow;i++)
346 Float_t x = firstrow + fInnerPadPitchLength*(Float_t)i;
348 // number of pads per row
349 Float_t y = (x-0.5*fInnerPadPitchLength)*tan(fInnerAngle/2.)-fInnerWireMount-
350 fInnerPadPitchWidth/2.;
351 // 0 and fNRowLow+1 reserved for cross talk rows
352 fYInner[i+1] = x*tan(fInnerAngle/2.)-fInnerWireMount;
353 fNPadsLow[i] = 1+2*(Int_t)(y/fInnerPadPitchWidth) ;
356 fYInner[0]=(fPadRowLow[0]-fInnerPadPitchLength)*tan(fInnerAngle/2.)-fInnerWireMount;
357 fYInner[fNRowLow+1]=(fPadRowLow[fNRowLow-1]+fInnerPadPitchLength)*tan(fInnerAngle/2.)-fInnerWireMount;
358 firstrow = fOuterRadiusLow + 1.6;
359 for(i=0;i<fNRowUp;i++)
362 Float_t x = firstrow + fOuter1PadPitchLength*(Float_t)i;
364 Float_t y =(x-0.5*fOuter1PadPitchLength)*tan(fOuterAngle/2.)-fOuterWireMount-
365 fOuterPadPitchWidth/2.;
366 fYOuter[i+1]= x*tan(fOuterAngle/2.)-fOuterWireMount;
367 fNPadsUp[i] = 1+2*(Int_t)(y/fOuterPadPitchWidth) ;
369 fLastWireUp1=fPadRowUp[i] +0.375;
370 firstrow = fPadRowUp[i] + 0.5*(fOuter1PadPitchLength+fOuter2PadPitchLength);
375 Float_t x = firstrow + fOuter2PadPitchLength*(Float_t)(i-64);
377 Float_t y =(x-0.5*fOuter2PadPitchLength)*tan(fOuterAngle/2.)-fOuterWireMount-
378 fOuterPadPitchWidth/2.;
379 fNPadsUp[i] = 1+2*(Int_t)(y/fOuterPadPitchWidth) ;
381 fYOuter[i+1] = fPadRowUp[i]*tan(fOuterAngle/2.)-fOuterWireMount;
384 fYOuter[0]=(fPadRowUp[0]-fOuter1PadPitchLength)*tan(fOuterAngle/2.)-fOuterWireMount;
385 fYOuter[fNRowUp+1]=(fPadRowUp[fNRowUp-1]+fOuter2PadPitchLength)*tan(fOuterAngle/2.)-fOuterWireMount;
386 fNtRows = fNInnerSector*fNRowLow+fNOuterSector*fNRowUp;
390 Float_t AliTPCParamSR::GetYInner(Int_t irow) const
392 return fYInner[irow];
394 Float_t AliTPCParamSR::GetYOuter(Int_t irow) const
396 return fYOuter[irow];
399 void AliTPCParamSR::Streamer(TBuffer &R__b)
401 // Stream an object of class AliTPC.
403 if (R__b.IsReading()) {
404 Version_t R__v = R__b.ReadVersion(); if (R__v) { }
405 // TObject::Streamer(R__b);
406 AliTPCParam::Streamer(R__b);
407 // if (R__v < 2) return;
410 R__b.WriteVersion(AliTPCParamSR::IsA());
411 //TObject::Streamer(R__b);
412 AliTPCParam::Streamer(R__b);
415 Int_t AliTPCParamSR::CalcResponseFast(Float_t* xyz, Int_t * index, Int_t row)
418 //calculate bin response as function of the input position -x
419 //return number of valid response bin
421 //we suppose that coordinate is expressed in float digits
422 // it's mean coordinate system 8
423 //xyz[0] - electron position w.r.t. pad center, normalized to pad length,
424 //xyz[1] is float pad (center pad is number 0) and xyz[2] is float time bin
425 if ( (fInnerPRF==0)||(fOuter1PRF==0)||(fOuter2PRF==0) ||(fTimeRF==0) ){
426 Error("AliTPCParamSR", "response function was not adjusted");
430 const Int_t kpadn = 500;
431 const Float_t kfpadn = 500.;
432 const Int_t ktimen = 500;
433 const Float_t kftimen = 500.;
434 const Int_t kpadrn = 500;
435 const Float_t kfpadrn = 500.;
439 static Float_t prfinner[2*kpadrn][5*kpadn]; //pad divided by 50
440 static Float_t prfouter1[2*kpadrn][5*kpadn]; //prfouter division
441 static Float_t prfouter2[2*kpadrn][5*kpadn];
443 static Float_t rftime[5*ktimen]; //time division
444 static Int_t blabla=0;
445 static Float_t zoffset=0;
446 static Float_t zwidth=0;
447 static Float_t zoffset2=0;
448 static TH1F * hdiff=0;
449 static TH1F * hdiff1=0;
450 static TH1F * hdiff2=0;
452 if (blabla==0) { //calculate Response function - only at the begginning
453 hdiff =new TH1F("prf_diff","prf_diff",10000,-1,1);
454 hdiff1 =new TH1F("no_repsonse1","no_response1",10000,-1,1);
455 hdiff2 =new TH1F("no_response2","no_response2",10000,-1,1);
458 zoffset = GetZOffset();
460 zoffset2 = zoffset/zwidth;
461 for (Int_t i=0;i<5*ktimen;i++){
462 rftime[i] = fTimeRF->GetRF(((i-2.5*kftimen)/kftimen)*zwidth+zoffset);
464 for (Int_t i=0;i<5*kpadn;i++){
465 for (Int_t j=0;j<2*kpadrn;j++){
467 fInnerPRF->GetPRF((i-2.5*kfpadn)/kfpadn
468 *fInnerPadPitchWidth,(j-kfpadrn)/kfpadrn*fInnerPadPitchLength);
470 fOuter1PRF->GetPRF((i-2.5*kfpadn)/kfpadn
471 *fOuterPadPitchWidth,(j-kfpadrn)/kfpadrn*fOuter1PadPitchLength);
475 fOuter2PRF->GetPRF((i-2.5*kfpadn)/kfpadn
476 *fOuterPadPitchWidth,(j-kfpadrn)/kfpadrn*fOuter2PadPitchLength);
479 } // the above is calculated only once
481 // calculate central padrow, pad, time
482 Int_t npads = GetNPads(index[1],index[3]-1);
483 Int_t cpadrow = index[2]; // electrons are here
484 Int_t cpad = TMath::Nint(xyz[1]);
485 Int_t ctime = TMath::Nint(xyz[2]+zoffset2);
487 Float_t dpadrow = xyz[0];
488 Float_t dpad = xyz[1]-cpad;
489 Float_t dtime = xyz[2]+zoffset2-ctime;
492 Int_t maxt =GetMaxTBin();
497 if (row>=0) { //if we are interesting about given pad row
498 fpadrow = row-cpadrow;
499 lpadrow = row-cpadrow;
501 fpadrow = (index[2]>1) ? -1 :0;
502 lpadrow = (index[2]<GetNRow(index[1])-1) ? 1:0;
504 Int_t fpad = (cpad > -npads/2+1) ? -2: -npads/2-cpad;
505 Int_t lpad = (cpad < npads/2-1) ? 2: npads/2-cpad;
506 Int_t ftime = (ctime>1) ? -2: -ctime;
507 Int_t ltime = (ctime<maxt-2) ? 2: maxt-ctime-1;
509 // cross talk from long pad to short one
510 if(row==fNRowUp1 && fpadrow==-1) {
511 dpadrow *= fOuter2PadPitchLength;
512 dpadrow += fOuterWWPitch;
513 dpadrow /= fOuter1PadPitchLength;
515 // cross talk from short pad to long one
516 if(row==fNRowUp1+1 && fpadrow==1){
517 dpadrow *= fOuter1PadPitchLength;
518 if(dpadrow < 0.) dpadrow = -1.; //protection against 3rd wire
519 dpadrow += fOuterWWPitch;
520 dpadrow /= fOuter2PadPitchLength;
524 Int_t apadrow = TMath::Nint((dpadrow-fpadrow)*kfpadrn+kfpadrn);
525 for (Int_t ipadrow = fpadrow; ipadrow<=lpadrow;ipadrow++){
526 if ( (apadrow<0) || (apadrow>=2*kpadrn))
528 Int_t apad= TMath::Nint((dpad-fpad)*kfpadn+2.5*kfpadn);
529 for (Int_t ipad = fpad; ipad<=lpad;ipad++){
531 if (index[1]<fNInnerSector)
532 cweight=prfinner[apadrow][apad];
535 cweight=prfouter1[apadrow][apad];
536 else cweight=prfouter2[apadrow][apad];
539 // if (cweight<fResponseThreshold) continue;
540 Int_t atime = TMath::Nint((dtime-ftime)*kftimen+2.5*kftimen);
541 for (Int_t itime = ftime;itime<=ltime;itime++){
542 Float_t cweight2 = cweight*rftime[atime];
543 if (cweight2>fResponseThreshold) {
544 fResponseBin[cindex3++]=cpadrow+ipadrow;
545 fResponseBin[cindex3++]=cpad+ipad;
546 fResponseBin[cindex3++]=ctime+itime;
547 fResponseWeight[cindex++]=cweight2;
551 printf("Pici pici %d %f %d\n",ipad,dpad,apad);