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cc80f89e 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
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 **************************************************************************/
15
16/*
17$Log$
73477b37 18Revision 1.4 2000/11/02 07:33:15 kowal2
19Improvements of the code.
20
c11cb93f 21Revision 1.3 2000/06/30 12:07:50 kowal2
22Updated from the TPC-PreRelease branch
23
73042f01 24Revision 1.2.4.2 2000/06/14 16:48:24 kowal2
25Parameter setting improved. Removed compiler warnings
26
27Revision 1.2.4.1 2000/06/09 07:55:39 kowal2
28
29Updated defaults
30
31Revision 1.2 2000/04/17 09:37:33 kowal2
32removed obsolete AliTPCDigitsDisplay.C
33
cc80f89e 34Revision 1.1.4.2 2000/04/10 11:36:13 kowal2
35
36New Detector parameters handling class
37
38*/
39
40///////////////////////////////////////////////////////////////////////
41// Manager and of geomety classes for set: TPC //
42// //
43// !sectors are numbered from 0 //
44// !pad rows are numbered from 0 //
45//
46// 27.7. - AliTPCPaaramSr object for TPC
47// TPC with straight pad rows
48// Origin: Marian Ivanov, Uni. of Bratislava, ivanov@fmph.uniba.sk //
49// //
50///////////////////////////////////////////////////////////////////////
51
52
53#include <iostream.h>
54#include <TMath.h>
55#include <TObject.h>
56#include <AliTPCParamSR.h>
73042f01 57#include "AliTPCPRF2D.h"
58#include "AliTPCRF1D.h"
cc80f89e 59
60
61
62ClassImp(AliTPCParamSR)
63const static Int_t kMaxRows=600;
64const static Float_t kEdgeSectorSpace = 2.5;
73042f01 65const static Float_t kFacSigmaPadRow=3.;
cc80f89e 66const static Float_t kFacSigmaPad=3.;
67const static Float_t kFacSigmaTime=3.;
68
69
70AliTPCParamSR::AliTPCParamSR()
71{
72 //
73 //constructor set the default parameters
74 fInnerPRF=0;
75 fOuterPRF=0;
76 fTimeRF = 0;
77 fFacSigmaPadRow = Float_t(kFacSigmaPadRow);
78 fFacSigmaPad = Float_t(kFacSigmaPad);
79 fFacSigmaTime = Float_t(kFacSigmaTime);
cc80f89e 80 SetDefault();
81 Update();
82}
83
84AliTPCParamSR::~AliTPCParamSR()
85{
86 //
87 //destructor destroy some dynmicaly alocated variables
88 if (fInnerPRF != 0) delete fInnerPRF;
89 if (fOuterPRF != 0) delete fOuterPRF;
90 if (fTimeRF != 0) delete fTimeRF;
91}
92
93void AliTPCParamSR::SetDefault()
94{
95 //set default TPC param
96 fbStatus = kFALSE;
97 AliTPCParam::SetDefault();
98}
99
100Int_t AliTPCParamSR::CalcResponse(Float_t* xyz, Int_t * index, Int_t row)
101{
102 //
103 //calculate bin response as function of the input position -x
104 //return number of valid response bin
105 //
106 //we suppose that coordinate is expressed in float digits
107 // it's mean coordinate system 8
108 //xyz[0] - float padrow xyz[1] is float pad (center pad is number 0) and xyz[2] is float time bin
109 if ( (fInnerPRF==0)||(fOuterPRF==0)||(fTimeRF==0) ){
110 Error("AliTPCParamSR", "response function was not adjusted");
111 return -1;
112 }
113
114 Float_t sfpadrow; // sigma of response function
115 Float_t sfpad; // sigma of
116 Float_t sftime= fFacSigmaTime*fTimeRF->GetSigma()/fZWidth; //3 sigma of time response
117 if (index[1]<fNInnerSector){
118 sfpadrow =fFacSigmaPadRow*fInnerPRF->GetSigmaY()/fInnerPadPitchLength;
119 sfpad =fFacSigmaPad*fInnerPRF->GetSigmaX()/fInnerPadPitchWidth;
120 }else{
121 sfpadrow =fFacSigmaPadRow*fOuterPRF->GetSigmaY()/fOuterPadPitchLength;
122 sfpad =fFacSigmaPad*fOuterPRF->GetSigmaX()/fOuterPadPitchWidth;
123 }
124
125 Int_t fpadrow = TMath::Max(TMath::Nint(index[2]+xyz[0]-sfpadrow),0); //"first" padrow
126 Int_t fpad = TMath::Nint(xyz[1]-sfpad); //first pad
127 Int_t ftime = TMath::Max(TMath::Nint(xyz[2]+GetZOffset()/GetZWidth()-sftime),0); // first time
128 Int_t lpadrow = TMath::Min(TMath::Nint(index[2]+xyz[0]+sfpadrow),fpadrow+19); //"last" padrow
129 lpadrow = TMath::Min(GetNRow(index[1])-1,lpadrow);
130 Int_t lpad = TMath::Min(TMath::Nint(xyz[1]+sfpad),fpad+19); //last pad
131 Int_t ltime = TMath::Min(TMath::Nint(xyz[2]+GetZOffset()/GetZWidth()+sftime),ftime+19); // last time
132 ltime = TMath::Min(ltime,GetMaxTBin()-1);
133
134 if (row>=0) { //if we are interesting about given pad row
135 if (fpadrow<=row) fpadrow =row;
136 else
137 return 0;
138 if (lpadrow>=row) lpadrow = row;
139 else
140 return 0;
141 }
142
143
144 Float_t padres[20][20]; //I don't expect bigger number of bins
145 Float_t timeres[20];
146 Int_t cindex3=0;
147 Int_t cindex=0;
148 Float_t cweight = 0;
149 if (fpadrow>=0) {
150 //calculate padresponse function
151 Int_t padrow, pad;
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);
158 else
159 padres[padrow-fpadrow][pad-fpad]=fOuterPRF->GetPRF(dx*fOuterPadPitchWidth,dy*fOuterPadPitchLength); }
160 //calculate time response function
161 Int_t time;
162 for (time = ftime;time<=ltime;time++)
163 timeres[time-ftime]= fTimeRF->GetRF((-xyz[2]+Float_t(time))*fZWidth);
164 //write over threshold values to stack
165 for (padrow = fpadrow;padrow<=lpadrow;padrow++)
166 for (pad = fpad;pad<=lpad;pad++)
167 for (time = ftime;time<=ltime;time++){
168 cweight = timeres[time-ftime]*padres[padrow-fpadrow][pad-fpad];
169 if (cweight>fResponseThreshold) {
170 fResponseBin[cindex3]=padrow;
171 fResponseBin[cindex3+1]=pad;
172 fResponseBin[cindex3+2]=time;
173 cindex3+=3;
174 fResponseWeight[cindex]=cweight;
175 cindex++;
176 }
177 }
178 }
179 fCurrentMax=cindex;
180 return fCurrentMax;
181}
182
183void AliTPCParamSR::TransformTo8(Float_t *xyz, Int_t *index) const
184{
185 //
186 // transformate point to digit coordinate
187 //
188 if (index[0]==0) Transform0to1(xyz,index);
189 if (index[0]==1) Transform1to2(xyz,index);
190 if (index[0]==2) Transform2to3(xyz,index);
191 if (index[0]==3) Transform3to4(xyz,index);
192 if (index[0]==4) Transform4to8(xyz,index);
193}
194
195void AliTPCParamSR::TransformTo2(Float_t *xyz, Int_t *index) const
196{
197 //
198 //transformate point to rotated coordinate
199 //
200 //we suppose that
201 if (index[0]==0) Transform0to1(xyz,index);
202 if (index[0]==1) Transform1to2(xyz,index);
203 if (index[0]==4) Transform4to3(xyz,index);
204 if (index[0]==8) { //if we are in digit coordinate system transform to global
205 Transform8to4(xyz,index);
206 Transform4to3(xyz,index);
207 }
208}
209
210void AliTPCParamSR::CRXYZtoXYZ(Float_t *xyz,
211 const Int_t &sector, const Int_t & padrow, Int_t option) const
212{
213 //transform relative coordinates to absolute
214 Bool_t rel = ( (option&2)!=0);
215 Int_t index[2]={sector,padrow};
216 if (rel==kTRUE) Transform4to3(xyz,index);//if the position is relative to pad row
217 Transform2to1(xyz,index);
218}
219
220void AliTPCParamSR::XYZtoCRXYZ(Float_t *xyz,
221 Int_t &sector, Int_t & padrow, Int_t option) const
222{
223 //transform global position to the position relative to the sector padrow
224 //if option=0 X calculate absolute calculate sector
225 //if option=1 X absolute use input sector
226 //if option=2 X relative to pad row calculate sector
227 //if option=3 X relative use input sector
228 //!!!!!!!!! WE start to calculate rows from row = 0
229 Int_t index[2];
230 Bool_t rel = ( (option&2)!=0);
231
232 //option 0 and 2 means that we don't have information about sector
233 if ((option&1)==0) Transform0to1(xyz,index); //we calculate sector number
234 else
235 index[0]=sector;
236 Transform1to2(xyz,index);
237 Transform2to3(xyz,index);
238 //if we store relative position calculate position relative to pad row
239 if (rel==kTRUE) Transform3to4(xyz,index);
240 sector = index[0];
241 padrow = index[1];
242}
243
244Float_t AliTPCParamSR::GetPrimaryLoss(Float_t *x, Int_t *index, Float_t *angle)
245{
246 //
247 //
248 Float_t padlength=GetPadPitchLength(index[1]);
249 Float_t a1=TMath::Sin(angle[0]);
250 a1*=a1;
251 Float_t a2=TMath::Sin(angle[1]);
252 a2*=a2;
253 Float_t length =padlength*TMath::Sqrt(1+a1+a2);
254 return length*fNPrimLoss;
255}
256
257Float_t AliTPCParamSR::GetTotalLoss(Float_t *x, Int_t *index, Float_t *angle)
258{
259 //
260 //
261 Float_t padlength=GetPadPitchLength(index[1]);
262 Float_t a1=TMath::Sin(angle[0]);
263 a1*=a1;
264 Float_t a2=TMath::Sin(angle[1]);
265 a2*=a2;
266 Float_t length =padlength*TMath::Sqrt(1+a1+a2);
267 return length*fNTotalLoss;
268
269}
270
271
272void AliTPCParamSR::GetClusterSize(Float_t *x, Int_t *index, Float_t *angle, Int_t mode, Float_t *sigma)
273{
274 //
275 //return cluster sigma2 (x,y) for particle at position x
276 // in this case x coordinata is in drift direction
277 //and y in pad row direction
278 //we suppose that input coordinate system is digit system
279
280 Float_t xx;
281 Float_t lx[3] = {x[0],x[1],x[2]};
282 Int_t li[3] = {index[0],index[1],index[2]};
283 TransformTo2(lx,li);
284 // Float_t sigmadiff;
285 sigma[0]=0;
286 sigma[1]=0;
287
288 xx = lx[2]; //calculate drift length in cm
289 if (xx>0) {
290 sigma[0]+= xx*GetDiffL()*GetDiffL();
291 sigma[1]+= xx*GetDiffT()*GetDiffT();
292 }
293
294
295 //sigma[0]=sigma[1]=0;
296 if (GetTimeRF()!=0) sigma[0]+=GetTimeRF()->GetSigma()*GetTimeRF()->GetSigma();
297 if ( (index[1]<fNInnerSector) &&(GetInnerPRF()!=0))
298 sigma[1]+=GetInnerPRF()->GetSigmaX()*GetInnerPRF()->GetSigmaX();
299 if ( (index[1]>=fNInnerSector) && (GetOuterPRF()!=0))
300 sigma[1]+=GetOuterPRF()->GetSigmaX()*GetOuterPRF()->GetSigmaX();
301
302
303 sigma[0]/= GetZWidth()*GetZWidth();
304 sigma[1]/=GetPadPitchWidth(index[0])*GetPadPitchWidth(index[0]);
305}
306
307
308
309
310void AliTPCParamSR::GetSpaceResolution(Float_t *x, Int_t *index, Float_t *angle,
311 Float_t amplitude, Int_t mode, Float_t *sigma)
312{
313 //
314 //
315 //
316
317}
318Float_t AliTPCParamSR::GetAmp(Float_t *x, Int_t *index, Float_t *angle)
319{
320 //
321 //
322 //
323 return 0;
324}
325
326Float_t * AliTPCParamSR::GetAnglesAccMomentum(Float_t *x, Int_t * index, Float_t* momentum, Float_t *angle)
327{
328 //
329 //calculate angle of track to padrow at given position
330 // for given magnetic field and momentum of the particle
331 //
332
333 TransformTo2(x,index);
334 AliDetectorParam::GetAnglesAccMomentum(x,index,momentum,angle);
335 Float_t addangle = TMath::ASin(x[1]/GetPadRowRadii(index[1],index[2]));
336 angle[1] +=addangle;
337 return angle;
338}
339
340
341Bool_t AliTPCParamSR::Update()
342{
343
344 //
345 // update some calculated parameter which must be updated after changing "base"
346 // parameters
347 // for example we can change size of pads and according this recalculate number
348 // of pad rows, number of of pads in given row ....
349 Int_t i;
350 if (AliTPCParam::Update()==kFALSE) return kFALSE;
351 fbStatus = kFALSE;
352
353 // adjust lower sectors pad row positions and pad numbers
354 fNRowLow = (Int_t(1.001+((fRInnerLastWire-fRInnerFirstWire)/fInnerWWPitch))
355 -2*fInnerDummyWire)/fNInnerWiresPerPad;
356 if ( kMaxRows<fNRowLow) fNRowUp = kMaxRows;
357 if (1>fNRowLow) return kFALSE;
358
359 //Float_t firstpad = fRInnerFirstWire+(fInnerDummyWire-0.5)*fInnerWWPitch
360 // +fInnerPadPitchLength/2.;
361 Float_t lastpad = fRInnerLastWire-(fInnerDummyWire-0.5)*fInnerWWPitch
362 -fInnerPadPitchLength/2.;
c11cb93f 363 Float_t firstpad = lastpad-Float_t(fNRowLow-1)*fInnerPadPitchLength;
cc80f89e 364 for (i = 0;i<fNRowLow;i++)
365 {
366 Float_t x = firstpad +fInnerPadPitchLength*(Float_t)i;
367 Float_t y = (x-0.5*fInnerPadPitchLength)*tan(fInnerAngle/2.)-fInnerWireMount-
368 fInnerPadPitchWidth/2.;
369 fPadRowLow[i] = x;
370 fNPadsLow[i] = 1+2*(Int_t)(y/fInnerPadPitchWidth) ;
371 }
372
373 // adjust upper sectors pad row positions and pad numbers
374 fNRowUp = (Int_t(1.001+((fROuterLastWire-fROuterFirstWire)/fOuterWWPitch))
375 -2*fOuterDummyWire)/fNOuterWiresPerPad;
376 if ( kMaxRows<fNRowUp) fNRowUp = kMaxRows;
377 if (1>fNRowUp) return kFALSE;
378 firstpad = fROuterFirstWire+(fOuterDummyWire-0.5)*fOuterWWPitch
379 +fOuterPadPitchLength/2.;
380
381 for (i = 0;i<fNRowUp;i++)
382 {
383 Float_t x = firstpad + fOuterPadPitchLength*(Float_t)i;
384 Float_t y = (x-0.5*fOuterPadPitchLength)*tan(fOuterAngle/2.)-fOuterWireMount-
73477b37 385 fOuterPadPitchWidth/2.;
cc80f89e 386 fPadRowUp[i] = x;
387 fNPadsUp[i] = 1+2*(Int_t)(y/fOuterPadPitchWidth) ;
388 }
389 fNtRows = fNInnerSector*fNRowLow+fNOuterSector*fNRowUp;
c11cb93f 390 fbStatus = kTRUE;
cc80f89e 391 return kTRUE;
392}
393
394
cc80f89e 395void AliTPCParamSR::Streamer(TBuffer &R__b)
396{
397 // Stream an object of class AliTPC.
398
399 if (R__b.IsReading()) {
400 Version_t R__v = R__b.ReadVersion(); if (R__v) { }
401 // TObject::Streamer(R__b);
402 AliTPCParam::Streamer(R__b);
403 // if (R__v < 2) return;
404 Update();
405 } else {
406 R__b.WriteVersion(AliTPCParamSR::IsA());
407 //TObject::Streamer(R__b);
408 AliTPCParam::Streamer(R__b);
409 }
410}
411
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