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 #include <Riostream.h>
30 #include "AliITSMapA2.h"
31 #include "AliITSRawData.h"
32 #include "AliITSdigitSPD.h"
33 #include "AliITSetfSDD.h"
34 #include "AliITSmodule.h"
35 #include "AliITSpList.h"
36 #include "AliITSresponseSDD.h"
37 #include "AliITSCalibrationSDD.h"
38 #include "AliITSsegmentationSDD.h"
39 #include "AliITSsimulationSDD.h"
43 ClassImp(AliITSsimulationSDD)
44 ////////////////////////////////////////////////////////////////////////
46 // Written by Piergiorgio Cerello //
47 // November 23 1999 //
49 // AliITSsimulationSDD is the simulation of SDDs. //
50 ////////////////////////////////////////////////////////////////////////
52 //______________________________________________________________________
53 AliITSsimulationSDD::AliITSsimulationSDD():
67 fCrosstalkFlag(kFALSE),
72 // Default constructor
74 SetPerpendTracksFlag();
78 //______________________________________________________________________
79 AliITSsimulationSDD::AliITSsimulationSDD(const AliITSsimulationSDD &source) :
80 AliITSsimulation(source),
82 fHitMap2(source.fHitMap2),
83 fHitSigMap2(source.fHitSigMap2),
84 fHitNoiMap2(source.fHitNoiMap2),
85 fElectronics(source.fElectronics),
88 fOutZR(source.fOutZR),
89 fOutZI(source.fOutZI),
90 fAnodeFire(source.fAnodeFire),
93 fCrosstalkFlag(source.fCrosstalkFlag),
94 fDoFFT(source.fDoFFT),
95 fNofMaps(source.fNofMaps),
96 fMaxNofSamples(source.fMaxNofSamples),
97 fScaleSize(source.fScaleSize){
98 // Copy constructor to satify Coding roules only.
101 //______________________________________________________________________
102 AliITSsimulationSDD& AliITSsimulationSDD::operator=(const AliITSsimulationSDD &src){
103 // Assignment operator to satify Coding roules only.
105 if(this==&src) return *this;
106 Error("AliITSsimulationSDD","Not allowed to make a = with "
107 "AliITSsimulationSDD Using default creater instead");
111 //______________________________________________________________________
112 AliITSsimulation& AliITSsimulationSDD::operator=(const AliITSsimulation &src){
113 // Assignment operator to satify Coding roules only.
115 if(this==&src) return *this;
116 Error("AliITSsimulationSSD","Not allowed to make a = with "
117 "AliITSsimulationSDD Using default creater instead");
121 //______________________________________________________________________
122 AliITSsimulationSDD::AliITSsimulationSDD(AliITSDetTypeSim* dettyp):
123 AliITSsimulation(dettyp),
136 fCrosstalkFlag(kFALSE),
141 // Default Constructor
144 //______________________________________________________________________
145 void AliITSsimulationSDD::Init(){
146 // Standard Constructor
149 SetPerpendTracksFlag();
153 AliITSsegmentationSDD* seg = (AliITSsegmentationSDD*)GetSegmentationModel(1);
155 AliITSresponseSDD* res = (AliITSresponseSDD*)fDetType->GetResponse(1);
156 fpList = new AliITSpList( seg->Npz(),
157 fScaleSize*seg->Npx() );
158 fHitSigMap2 = new AliITSMapA2(seg,fScaleSize,1);
159 fHitNoiMap2 = new AliITSMapA2(seg,fScaleSize,1);
160 fHitMap2 = fHitSigMap2;
162 fNofMaps = seg->Npz();
163 fMaxNofSamples = seg->Npx();
164 fAnodeFire = new Bool_t [fNofMaps];
166 Float_t sddWidth = seg->Dz();
167 Float_t anodePitch = seg->Dpz(0);
168 Double_t timeStep = (Double_t)seg->Dpx(0);
170 if(anodePitch*(fNofMaps/2) > sddWidth) {
171 Warning("AliITSsimulationSDD",
172 "Too many anodes %d or too big pitch %f \n",
173 fNofMaps/2,anodePitch);
177 fElectronics = new AliITSetfSDD(timeStep/fScaleSize,
181 fITS = (AliITS*)gAlice->GetModule("ITS");
183 fInZR = new Double_t [fScaleSize*fMaxNofSamples];
184 fInZI = new Double_t [fScaleSize*fMaxNofSamples];
185 fOutZR = new Double_t [fScaleSize*fMaxNofSamples];
186 fOutZI = new Double_t [fScaleSize*fMaxNofSamples];
188 //______________________________________________________________________
189 AliITSsimulationSDD::~AliITSsimulationSDD() {
203 if(fInZR) delete [] fInZR;
204 if(fInZI) delete [] fInZI;
205 if(fOutZR) delete [] fOutZR;
206 if(fOutZI) delete [] fOutZI;
207 if(fAnodeFire) delete [] fAnodeFire;
209 //______________________________________________________________________
210 void AliITSsimulationSDD::InitSimulationModule( Int_t module, Int_t event ) {
211 // create maps to build the lists of tracks for each summable digit
215 memset(fAnodeFire,0,sizeof(Bool_t)*fNofMaps);
217 //______________________________________________________________________
218 void AliITSsimulationSDD::ClearMaps() {
221 fHitSigMap2->ClearMap();
222 fHitNoiMap2->ClearMap();
224 //______________________________________________________________________
225 void AliITSsimulationSDD::FastFourierTransform(Double_t *real,
226 Double_t *imag,Int_t direction) {
227 // Do a Fast Fourier Transform
229 Int_t samples = fElectronics->GetSamples();
230 Int_t l = (Int_t) ((log((Float_t) samples)/log(2.))+0.5);
233 Int_t m2 = samples/m1;
235 for(i=1; i<=l; i++) {
236 for(j=0; j<samples; j += m1) {
238 for(k=j; k<= j+m-1; k++) {
239 Double_t wsr = fElectronics->GetWeightReal(p);
240 Double_t wsi = fElectronics->GetWeightImag(p);
241 if(direction == -1) wsi = -wsi;
242 Double_t xr = *(real+k+m);
243 Double_t xi = *(imag+k+m);
244 *(real+k+m) = wsr*(*(real+k)-xr) - wsi*(*(imag+k)-xi);
245 *(imag+k+m) = wsr*(*(imag+k)-xi) + wsi*(*(real+k)-xr);
256 for(j=0; j<samples; j++) {
260 for(i1=1; i1<=l; i1++) {
263 p = p + p + j2 - j1 - j1;
266 Double_t xr = *(real+j);
267 Double_t xi = *(imag+j);
268 *(real+j) = *(real+p);
269 *(imag+j) = *(imag+p);
274 if(direction == -1) {
275 for(i=0; i<samples; i++) {
276 *(real+i) /= samples;
277 *(imag+i) /= samples;
279 } // end if direction == -1
283 //______________________________________________________________________
284 void AliITSsimulationSDD::SDigitiseModule(AliITSmodule *mod,Int_t md,Int_t ev){
285 // digitize module using the "slow" detector simulator creating
288 TObjArray *fHits = mod->GetHits();
289 Int_t nhits = fHits->GetEntriesFast();
292 InitSimulationModule( md, ev );
293 HitsToAnalogDigits( mod ); // fills fHitMap2 which is = fHitSigmap2
294 ChargeToSignal( fModule,kFALSE,kTRUE ); // - Process signal adding gain without adding noise
295 fHitMap2 = fHitNoiMap2; // - Swap to noise map
296 ChargeToSignal( fModule,kTRUE,kFALSE ); // - Process only noise
297 fHitMap2 = fHitSigMap2; // - Return to signal map
301 //______________________________________________________________________
302 Bool_t AliITSsimulationSDD::AddSDigitsToModule(TClonesArray *pItemArray,
304 // Add Summable digits to module maps.
305 AliITSresponseSDD* res = (AliITSresponseSDD*)fDetType->GetResponse(1);
306 Int_t nItems = pItemArray->GetEntries();
307 Double_t maxadc = res->MaxAdc();
310 // cout << "Adding "<< nItems <<" SDigits to module " << fModule << endl;
311 for( Int_t i=0; i<nItems; i++ ) {
312 AliITSpListItem * pItem = (AliITSpListItem *)(pItemArray->At( i ));
313 if( pItem->GetModule() != fModule ) {
314 Error( "AliITSsimulationSDD","Error reading, SDigits module "
315 "%d != current module %d: exit",
316 pItem->GetModule(), fModule );
320 if(pItem->GetSignal()>0.0 ) sig = kTRUE;
322 fpList->AddItemTo( mask, pItem ); // Add SignalAfterElect + noise
323 AliITSpListItem * pItem2 = fpList->GetpListItem( pItem->GetIndex() );
324 Double_t sigAE = pItem2->GetSignalAfterElect();
325 if( sigAE >= maxadc ) sigAE = maxadc-1; // avoid overflow signal
328 fpList->GetMapIndex( pItem->GetIndex(), ia, it );
329 fHitMap2->SetHit( ia, it, sigAE );
330 fAnodeFire[ia] = kTRUE;
334 //______________________________________________________________________
335 void AliITSsimulationSDD::FinishSDigitiseModule() {
336 // digitize module using the "slow" detector simulator from
337 // the sum of summable digits.
341 //______________________________________________________________________
342 void AliITSsimulationSDD::DigitiseModule(AliITSmodule *mod,Int_t md,Int_t ev){
343 // create maps to build the lists of tracks for each digit
345 TObjArray *fHits = mod->GetHits();
346 Int_t nhits = fHits->GetEntriesFast();
348 InitSimulationModule( md, ev );
351 HitsToAnalogDigits( mod );
352 ChargeToSignal( fModule,kTRUE,kTRUE ); // process signal + noise
354 for( Int_t i=0; i<fNofMaps; i++ ) {
355 for( Int_t j=0; j<fMaxNofSamples; j++ ) {
356 Int_t jdx = j*fScaleSize;
357 Int_t index = fpList->GetHitIndex( i, j );
358 AliITSpListItem pItemTmp2( fModule, index, 0. );
359 // put the fScaleSize analog digits in only one
360 for( Int_t ik=0; ik<fScaleSize; ik++ ) {
361 AliITSpListItem *pItemTmp = fpList->GetpListItem( i, jdx+ik );
362 if( pItemTmp == 0 ) continue;
363 pItemTmp2.Add( pItemTmp );
365 fpList->DeleteHit( i, j );
366 fpList->AddItemTo( 0, &pItemTmp2 );
372 //______________________________________________________________________
373 void AliITSsimulationSDD::FinishDigits() {
374 // introduce the electronics effects and do zero-suppression if required
376 if( fCrosstalkFlag ) ApplyCrosstalk(fModule);
378 AliITSCalibrationSDD* res = (AliITSCalibrationSDD*)GetCalibrationModel(fModule);
379 const char *kopt = res->GetZeroSuppOption();
380 if (strstr(kopt,"ZS")) Compress2D();
381 else StoreAllDigits();
383 //______________________________________________________________________
384 void AliITSsimulationSDD::HitsToAnalogDigits( AliITSmodule *mod ) {
385 // create maps to build the lists of tracks for each digit
386 AliITSsegmentationSDD* seg = (AliITSsegmentationSDD*)GetSegmentationModel(1);
387 AliITSCalibrationSDD* res = (AliITSCalibrationSDD*)GetCalibrationModel(fModule);
388 TObjArray *hits = mod->GetHits();
389 Int_t nhits = hits->GetEntriesFast();
391 // Int_t arg[6] = {0,0,0,0,0,0};
392 Int_t nofAnodes = fNofMaps/2;
393 Double_t sddLength = seg->Dx();
394 Double_t sddWidth = seg->Dz();
395 Double_t anodePitch = seg->Dpz(0);
396 Double_t timeStep = seg->Dpx(0);
397 Double_t driftSpeed ; // drift velocity (anode dependent)
398 //Float_t maxadc = res->GetMaxAdc();
399 //Float_t topValue = res->GetDynamicRange();
400 Double_t norm = res->GetMaxAdc()/res->GetDynamicRange(); // maxadc/topValue;
401 Double_t cHloss = res->GetChargeLoss();
402 Float_t dfCoeff, s1; res->DiffCoeff(dfCoeff,s1); // Signal 2d Shape
403 Double_t eVpairs = res->GetGeVToCharge()*1.0E9; // 3.6 eV by def.
404 Double_t nsigma = res->GetNSigmaIntegration(); //
405 Int_t nlookups = res->GetGausNLookUp(); //
406 Float_t jitter = res->GetJitterError(); //
408 // Piergiorgio's part (apart for few variables which I made float
409 // when i thought that can be done
410 // Fill detector maps with GEANT hits
411 // loop over hits in the module
413 const Float_t kconv = 1.0e+6; // GeV->KeV
415 Int_t iWing; // which detector wing/side.
416 Int_t ii,kk,ka,kt; // loop indexs
417 Int_t ia,it,index; // sub-pixel integration indexies
418 Int_t iAnode; // anode number.
419 Int_t timeSample; // time buckett.
420 Int_t anodeWindow; // anode direction charge integration width
421 Int_t timeWindow; // time direction charge integration width
422 Int_t jamin,jamax; // anode charge integration window
423 Int_t jtmin,jtmax; // time charge integration window
424 Int_t ndiv; // Anode window division factor.
425 Int_t nsplit; // the number of splits in anode and time windows==1.
426 Int_t nOfSplits; // number of times track length is split into
427 Float_t nOfSplitsF; // Floating point version of nOfSplits.
428 Float_t kkF; // Floating point version of loop index kk.
429 Double_t pathInSDD; // Track length in SDD.
430 Double_t drPath; // average position of track in detector. in microns
431 Double_t drTime; // Drift time
432 Double_t nmul; // drift time window multiplication factor.
433 Double_t avDrft; // x position of path length segment in cm.
434 Double_t avAnode; // Anode for path length segment in Anode number (float)
435 Double_t zAnode; // Floating point anode number.
436 Double_t driftPath; // avDrft in microns.
437 Double_t width; // width of signal at anodes.
438 Double_t depEnergy; // Energy deposited in this GEANT step.
439 Double_t xL[3],dxL[3]; // local hit coordinates and diff.
440 Double_t sigA; // sigma of signal at anode.
441 Double_t sigT; // sigma in time/drift direction for track segment
442 Double_t aStep,aConst; // sub-pixel size and offset anode
443 Double_t tStep,tConst; // sub-pixel size and offset time
444 Double_t amplitude; // signal amplitude for track segment in nanoAmpere
445 Double_t chargeloss; // charge loss for track segment.
446 Double_t anodeAmplitude; // signal amplitude in anode direction
447 Double_t aExpo; // exponent of Gaussian anode direction
448 Double_t timeAmplitude; // signal amplitude in time direction
449 Double_t tExpo; // exponent of Gaussian time direction
450 // Double_t tof; // Time of flight in ns of this step.
452 for(ii=0; ii<nhits; ii++) {
453 if(!mod->LineSegmentL(ii,xL[0],dxL[0],xL[1],dxL[1],xL[2],dxL[2],
454 depEnergy,itrack)) continue;
456 if(xloc>0) iWing=0; // left side, carlos channel 0
457 else iWing=1; // right side
459 Float_t zloc=xL[2]+0.5*dxL[2];
460 zAnode=seg->GetAnodeFromLocal(xloc,zloc); // anode number in the range 0.-511.
461 driftSpeed = res->GetDriftSpeedAtAnode(zAnode);
462 if(timeStep*fMaxNofSamples < sddLength/driftSpeed) {
463 AliWarning("Time Interval > Allowed Time Interval\n");
467 // scale path to simulate a perpendicular track
468 // continue if the particle did not lose energy
469 // passing through detector
472 Form("fTrack = %d hit=%d module=%d This particle has passed without losing energy!",
473 itrack,ii,mod->GetIndex()));
475 } // end if !depEnergy
477 xL[0] += 0.0001*gRandom->Gaus( 0, jitter ); //
478 pathInSDD = TMath::Sqrt(dxL[0]*dxL[0]+dxL[1]*dxL[1]+dxL[2]*dxL[2]);
480 if (fFlag && pathInSDD) { depEnergy *= (0.03/pathInSDD); }
481 drPath = TMath::Abs(10000.*(dxL[0]+2.*xL[0])*0.5);
482 drPath = sddLength-drPath;
484 AliDebug(1, // this should be fixed at geometry level
485 Form("negative drift path drPath=%e sddLength=%e dxL[0]=%e xL[0]=%e",
486 drPath,sddLength,dxL[0],xL[0]));
488 } // end if drPath < 0
490 // Compute number of segments to brake step path into
491 drTime = drPath/driftSpeed; // Drift Time
492 sigA = TMath::Sqrt(2.*dfCoeff*drTime+s1*s1);// Sigma along the anodes
493 // calcuate the number of time the path length should be split into.
494 nOfSplits = (Int_t) (1. + 10000.*pathInSDD/sigA);
495 if(fFlag) nOfSplits = 1;
497 // loop over path segments, init. some variables.
498 depEnergy /= nOfSplits;
499 nOfSplitsF = (Float_t) nOfSplits;
500 Float_t theAverage=0.,theSteps=0.;
501 for(kk=0;kk<nOfSplits;kk++) { // loop over path segments
502 kkF = (Float_t) kk + 0.5;
503 avDrft = xL[0]+dxL[0]*kkF/nOfSplitsF;
504 avAnode = xL[2]+dxL[2]*kkF/nOfSplitsF;
507 zAnode = seg->GetAnodeFromLocal(avDrft,avAnode);
508 driftSpeed = res->GetDriftSpeedAtAnode(zAnode);
509 driftPath = TMath::Abs(10000.*avDrft);
510 driftPath = sddLength-driftPath;
512 AliDebug(1, // this should be fixed at geometry level
513 Form("negative drift path driftPath=%e sddLength=%e avDrft=%e dxL[0]=%e xL[0]=%e",
514 driftPath,sddLength,avDrft,dxL[0],xL[0]));
516 } // end if driftPath < 0
517 drTime = driftPath/driftSpeed; // drift time for segment.
518 timeSample = (Int_t) (fScaleSize*drTime/timeStep + 1); // time bin in range 1-256 !!!
519 if(timeSample > fScaleSize*fMaxNofSamples) {
520 AliWarning(Form("Wrong Time Sample: %e",timeSample));
522 } // end if timeSample > fScaleSize*fMaxNoofSamples
524 if(zAnode>nofAnodes) zAnode-=nofAnodes; // to have the anode number between 0. and 256.
525 if(zAnode*anodePitch > sddWidth || zAnode*anodePitch < 0.)
526 AliWarning(Form("Exceeding sddWidth=%e Z = %e",sddWidth,zAnode*anodePitch));
527 iAnode = (Int_t) (1.+zAnode); // iAnode in range 1-256 !!!!
528 if(iAnode < 1 || iAnode > nofAnodes) {
529 AliWarning(Form("Wrong iAnode: 1<%d>%d (xanode=%e)",iAnode,nofAnodes, zAnode));
531 } // end if iAnode < 1 || iAnode > nofAnodes
533 // store straight away the particle position in the array
534 // of particles and take idhit=ii only when part is entering (this
535 // requires FillModules() in the macro for analysis) :
537 // Sigma along the anodes for track segment.
538 sigA = TMath::Sqrt(2.*dfCoeff*drTime+s1*s1);
539 sigT = sigA/driftSpeed;
540 // Peak amplitude in nanoAmpere
541 amplitude = fScaleSize*160.*depEnergy/
542 (timeStep*eVpairs*2.*acos(-1.)*sigT*sigA);
543 amplitude *= timeStep/25.; // WARNING!!!!! Amplitude scaling to
544 // account for clock variations
545 // (reference value: 40 MHz)
546 chargeloss = 1.-cHloss*driftPath/1000.;
547 amplitude *= chargeloss;
548 width = 2.*nsigma/(nlookups-1);
556 } // end if drTime > 1200.
558 nsplit = 4; // hard-wired //nsplit=4;nsplit = (nsplit+1)/2*2;
559 // Sub-pixel size see computation of aExpo and tExpo.
560 aStep = anodePitch/(nsplit*fScaleSize*sigA);
561 aConst = zAnode*anodePitch/sigA;
562 tStep = timeStep/(nsplit*fScaleSize*sigT);
563 tConst = drTime/sigT;
564 // Define SDD window corresponding to the hit
565 anodeWindow = (Int_t)(fScaleSize*nsigma*sigA/anodePitch+1);
566 timeWindow = (Int_t) (fScaleSize*nsigma*sigT/timeStep+1.);
567 jamin = (iAnode - anodeWindow/ndiv - 2)*fScaleSize*nsplit +1;
568 jamax = (iAnode + anodeWindow/ndiv + 1)*fScaleSize*nsplit;
569 if(jamin <= 0) jamin = 1;
570 if(jamax > fScaleSize*nofAnodes*nsplit)
571 jamax = fScaleSize*nofAnodes*nsplit;
572 // jtmin and jtmax are Hard-wired
573 jtmin = (Int_t)(timeSample-timeWindow*nmul-1)*nsplit+1;
574 jtmax = (Int_t)(timeSample+timeWindow*nmul)*nsplit;
575 if(jtmin <= 0) jtmin = 1;
576 if(jtmax > fScaleSize*fMaxNofSamples*nsplit)
577 jtmax = fScaleSize*fMaxNofSamples*nsplit;
578 // Spread the charge in the anode-time window
579 for(ka=jamin; ka <=jamax; ka++) {
580 ia = (ka-1)/(fScaleSize*nsplit) + 1;
582 Warning("HitsToAnalogDigits","ia < 1: ");
585 if(ia > nofAnodes) ia = nofAnodes;
586 aExpo = (aStep*(ka-0.5)-aConst);
587 if(TMath::Abs(aExpo) > nsigma) anodeAmplitude = 0.;
589 Int_t theBin = (Int_t) ((aExpo+nsigma)/width+0.5);
590 anodeAmplitude = amplitude*res->GetGausLookUp(theBin);
591 } // end if TMath::Abs(aEspo) > nsigma
592 // index starts from 0
593 index = iWing*nofAnodes+ia-1;
595 for(kt=jtmin; kt<=jtmax; kt++) {
596 it = (kt-1)/nsplit+1; // it starts from 1
598 Warning("HitsToAnalogDigits","it < 1:");
601 if(it>fScaleSize*fMaxNofSamples)
602 it = fScaleSize*fMaxNofSamples;
603 tExpo = (tStep*(kt-0.5)-tConst);
604 if(TMath::Abs(tExpo) > nsigma) timeAmplitude = 0.;
606 Int_t theBin = (Int_t) ((tExpo+nsigma)/width+0.5);
607 timeAmplitude = anodeAmplitude*res->GetGausLookUp(theBin);
608 } // end if TMath::Abs(tExpo) > nsigma
609 // build the list of Sdigits for this module
612 // arg[2] = itrack; // track number
613 // arg[3] = ii-1; // hit number.
614 timeAmplitude *= norm;
616 // ListOfFiredCells(arg,timeAmplitude,alst,padr);
617 Double_t charge = timeAmplitude;
618 charge += fHitMap2->GetSignal(index,it-1);
619 fHitMap2->SetHit(index, it-1, charge);
620 fpList->AddSignal(index,it-1,itrack,ii-1,
621 mod->GetIndex(),timeAmplitude);
622 fAnodeFire[index] = kTRUE;
623 } // end loop over time in window
624 } // end if anodeAmplitude
625 } // loop over anodes in window
626 } // end loop over "sub-hits"
627 } // end loop over hits
630 //____________________________________________
631 void AliITSsimulationSDD::AddDigit( Int_t i, Int_t j, Int_t signalc, Int_t signale) {
633 Int_t size = AliITSdigit::GetNTracks();
636 Int_t * tracks = new Int_t[size];
637 Int_t * hits = new Int_t[size];
639 Float_t * charges = new Float_t[size];
645 AliITSpListItem *pItem = fpList->GetpListItem( i, j );
648 for( Int_t l=0; l<size; l++ ) {
654 Int_t idtrack = pItem->GetTrack( 0 );
655 if( idtrack >= 0 ) phys = pItem->GetSignal();
658 for( Int_t l=0; l<size; l++ ) if(l<pItem->GetMaxKept()) {
659 tracks[l] = pItem->GetTrack( l );
660 hits[l] = pItem->GetHit( l );
661 charges[l] = pItem->GetSignal( l );
669 fITS->AddSimDigit( 1, phys, digits, tracks, hits, charges, signale );
674 //______________________________________________________________________
675 void AliITSsimulationSDD::ChargeToSignal(Int_t mod,Bool_t bAddNoise, Bool_t bAddGain) {
676 // add baseline, noise, gain, electronics and ADC saturation effects
677 // apply dead channels
679 AliITSCalibrationSDD* res = (AliITSCalibrationSDD*)GetCalibrationModel(mod);
685 Float_t maxadc = res->GetMaxAdc();
687 for (i=0;i<fNofMaps;i++) {
688 if( !fAnodeFire[i] ) continue;
689 baseline = res->GetBaseline(i);
690 noise = res->GetNoise(i);
691 gain = res->GetChannelGain(i);
692 if(res->IsBad()) gain=0.;
693 if( res->IsChipBad(res->GetChip(i)) )gain=0.;
694 for(k=0; k<fScaleSize*fMaxNofSamples; k++) {
695 fInZR[k] = fHitMap2->GetSignal(i,k);
696 if(bAddGain) fInZR[k]*=gain;
698 contrib = (baseline + noise*gRandom->Gaus());
704 for(k=0; k<fMaxNofSamples; k++) {
705 Double_t newcont = 0.;
706 Double_t maxcont = 0.;
707 for(kk=0;kk<fScaleSize;kk++) {
708 newcont = fInZR[fScaleSize*k+kk];
709 if(newcont > maxcont) maxcont = newcont;
712 if (newcont >= maxadc) newcont = maxadc -1;
713 if(newcont >= baseline){
714 Warning("","newcont=%d>=baseline=%d",newcont,baseline);
717 fHitMap2->SetHit(i,k,newcont);
720 FastFourierTransform(&fInZR[0],&fInZI[0],1);
721 for(k=0; k<fScaleSize*fMaxNofSamples; k++) {
722 Double_t rw = fElectronics->GetTraFunReal(k);
723 Double_t iw = fElectronics->GetTraFunImag(k);
724 fOutZR[k] = fInZR[k]*rw - fInZI[k]*iw;
725 fOutZI[k] = fInZR[k]*iw + fInZI[k]*rw;
727 FastFourierTransform(&fOutZR[0],&fOutZI[0],-1);
728 for(k=0; k<fMaxNofSamples; k++) {
729 Double_t newcont1 = 0.;
730 Double_t maxcont1 = 0.;
731 for(kk=0;kk<fScaleSize;kk++) {
732 newcont1 = fOutZR[fScaleSize*k+kk];
733 if(newcont1 > maxcont1) maxcont1 = newcont1;
736 if (newcont1 >= maxadc) newcont1 = maxadc -1;
737 fHitMap2->SetHit(i,k,newcont1);
740 } // end for i loop over anodes
744 //______________________________________________________________________
745 void AliITSsimulationSDD::ApplyCrosstalk(Int_t mod) {
746 // function add the crosstalk effect to signal
747 // temporal function, should be checked...!!!
749 // create and inizialice crosstalk map
750 Float_t* ctk = new Float_t[fNofMaps*fMaxNofSamples+1];
752 Error( "ApplyCrosstalk", "no memory for temporal map: exit \n" );
755 memset( ctk, 0, sizeof(Float_t)*(fNofMaps*fMaxNofSamples+1) );
756 AliITSCalibrationSDD* calibr = (AliITSCalibrationSDD*)GetCalibrationModel(mod);
757 for( Int_t z=0; z<fNofMaps; z++ ) {
758 Double_t baseline = calibr->GetBaseline(z);
764 for( Int_t l=0; l<fMaxNofSamples; l++ ) {
765 Float_t fadc = (Float_t)fHitMap2->GetSignal( z, l );
766 if( fadc > baseline ) {
767 if( on == kFALSE && l<fMaxNofSamples-4 ) {
768 Float_t fadc1 = (Float_t)fHitMap2->GetSignal( z, l+1 );
769 if( fadc1 < fadc ) continue;
776 else { // end fadc > baseline
780 // make smooth derivative
781 Float_t* dev = new Float_t[fMaxNofSamples+1];
782 memset( dev, 0, sizeof(Float_t)*(fMaxNofSamples+1) );
784 Error( "ApplyCrosstalk",
785 "no memory for temporal array: exit \n" );
788 for( Int_t i=tstart; i<tstop; i++ ) {
789 if( i > 2 && i < fMaxNofSamples-2 )
790 dev[i] = -0.2*fHitMap2->GetSignal( z,i-2 )
791 -0.1*fHitMap2->GetSignal( z,i-1 )
792 +0.1*fHitMap2->GetSignal( z,i+1 )
793 +0.2*fHitMap2->GetSignal( z,i+2 );
796 // add crosstalk contribution to neibourg anodes
797 for( Int_t i=tstart; i<tstop; i++ ) {
799 Int_t i1 = (Int_t)((i-tstart)*.61+tstart+0.5); //
800 Float_t ctktmp = -dev[i1] * 0.25;
802 ctk[anode*fMaxNofSamples+i] += ctktmp;
805 if( anode < fNofMaps ) {
806 ctk[anode*fMaxNofSamples+i] += ctktmp;
811 } // if( nTsteps > 2 )
813 } // if( on == kTRUE )
818 for( Int_t a=0; a<fNofMaps; a++ )
819 for( Int_t t=0; t<fMaxNofSamples; t++ ) {
820 Float_t signal = fHitMap2->GetSignal(a,t)+ctk[a*fMaxNofSamples+t];
821 fHitMap2->SetHit( a, t, signal );
827 //______________________________________________________________________
828 Int_t AliITSsimulationSDD::Convert10to8(Int_t signal) const {
829 // To the 10 to 8 bit lossive compression.
830 // code from Davide C. and Albert W.
832 if (signal < 128) return signal;
833 if (signal < 256) return (128+((signal-128)>>1));
834 if (signal < 512) return (192+((signal-256)>>3));
835 if (signal < 1024) return (224+((signal-512)>>4));
838 //______________________________________________________________________
839 Int_t AliITSsimulationSDD::Convert8to10(Int_t signal) const {
840 // Decompression from 8 to 10 bit
842 if (signal < 0 || signal > 255) {
843 AliWarning(Form("Signal value %d out of range",signal));
845 } // end if signal <0 || signal >255
847 if (signal < 128) return signal;
849 if (TMath::Odd(signal)) return (128+((signal-128)<<1));
850 else return (128+((signal-128)<<1)+1);
851 } // end if signal < 192
853 if (TMath::Odd(signal)) return (256+((signal-192)<<3)+3);
854 else return (256+((signal-192)<<3)+4);
855 } // end if signal < 224
856 if (TMath::Odd(signal)) return (512+((signal-224)<<4)+7);
857 return (512+((signal-224)<<4)+8);
859 //______________________________________________________________________
860 void AliITSsimulationSDD::Compress2D(){
861 // 2D zero-suppression algorithm as described in ALICE-INT-1999-28 V10
862 AliITSCalibrationSDD* res = (AliITSCalibrationSDD*)GetCalibrationModel(fModule);
863 for (Int_t iWing=0; iWing<2; iWing++) {
864 Int_t tL=res->GetZSLowThreshold(iWing);
865 Int_t tH=res->GetZSHighThreshold(iWing);
866 for (Int_t i=0; i<fNofMaps/2; i++) {
867 Int_t ian=i+iWing*fNofMaps/2;
868 if( !fAnodeFire[ian] ) continue;
869 for (Int_t itb=0; itb<fMaxNofSamples; itb++) {
870 Int_t nLow=0, nHigh=0;
871 Float_t cC=fHitMap2->GetSignal(ian,itb);
873 nLow++; // cC is greater than tL
876 // Get "quintuple": WCE
879 if(itb>0) wW=fHitMap2->GetSignal(ian,itb-1);
883 if(itb<fMaxNofSamples-1) eE=fHitMap2->GetSignal(ian,itb+1);
887 if(i<(fNofMaps/2-1)) nN=fHitMap2->GetSignal(ian+1,itb);
891 if(i>0) sS=fHitMap2->GetSignal(ian-1,itb);
895 if(nLow>=3 && nHigh>=1){
896 Int_t signal=(Int_t)cC;
897 Int_t signalc = Convert10to8(signal);
898 Int_t signale = Convert8to10(signalc);
899 signalc-=tL; // subtract low threshold after 10 to 8 bit compression
900 AddDigit(ian,itb,signalc,signale); // store C
908 //______________________________________________________________________
909 void AliITSsimulationSDD::StoreAllDigits(){
910 // store digits for non-zero-suppressed data
911 for (Int_t ian=0; ian<fNofMaps; ian++) {
912 for (Int_t itb=0; itb<fMaxNofSamples; itb++){
913 Int_t signal=(Int_t)(fHitMap2->GetSignal(ian,itb));
914 Int_t signalc = Convert10to8(signal);
915 Int_t signale = Convert8to10(signalc);
916 AddDigit(ian,itb,signalc,signale);
920 //______________________________________________________________________
921 void AliITSsimulationSDD::CreateHistograms(Int_t scale){
922 // Creates histograms of maps for debugging
925 fHis=new TObjArray(fNofMaps);
926 for (i=0;i<fNofMaps;i++) {
927 TString sddName("sdd_");
929 sprintf(candNum,"%d",i+1);
930 sddName.Append(candNum);
931 fHis->AddAt(new TH1F(sddName.Data(),"SDD maps",scale*fMaxNofSamples,
932 0.,(Float_t) scale*fMaxNofSamples), i);
935 //______________________________________________________________________
936 void AliITSsimulationSDD::FillHistograms(){
937 // fill 1D histograms from map
941 for( Int_t i=0; i<fNofMaps; i++) {
942 TH1F *hist =(TH1F *)fHis->UncheckedAt(i);
943 Int_t nsamples = hist->GetNbinsX();
944 for( Int_t j=0; j<nsamples; j++) {
945 Double_t signal=fHitMap2->GetSignal(i,j);
946 hist->Fill((Float_t)j,signal);
950 //______________________________________________________________________
951 void AliITSsimulationSDD::ResetHistograms(){
952 // Reset histograms for this detector
955 for (i=0;i<fNofMaps;i++ ) {
956 if (fHis->At(i)) ((TH1F*)fHis->At(i))->Reset();
959 //______________________________________________________________________
960 TH1F *AliITSsimulationSDD::GetAnode(Int_t wing, Int_t anode) {
961 // Fills a histogram from a give anode.
965 if(wing <=0 || wing > 2) {
966 Warning("GetAnode","Wrong wing number: %d",wing);
968 } // end if wing <=0 || wing >2
969 if(anode <=0 || anode > fNofMaps/2) {
970 Warning("GetAnode","Wrong anode number: %d",anode);
972 } // end if ampde <=0 || andoe > fNofMaps/2
974 Int_t index = (wing-1)*fNofMaps/2 + anode-1;
975 return (TH1F*)(fHis->At(index));
977 //______________________________________________________________________
978 void AliITSsimulationSDD::WriteToFile(TFile *hfile) {
979 // Writes the histograms to a file
985 for(i=0; i<fNofMaps; i++) fHis->At(i)->Write(); //fAdcs[i]->Write();
988 //______________________________________________________________________
989 void AliITSsimulationSDD::WriteSDigits(){
990 // Fills the Summable digits Tree
991 static AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS");
993 for( Int_t i=0; i<fNofMaps; i++ ) {
994 if( !fAnodeFire[i] ) continue;
995 for( Int_t j=0; j<fMaxNofSamples; j++ ) {
996 Double_t sig = fHitMap2->GetSignal( i, j );
998 Int_t jdx = j*fScaleSize;
999 Int_t index = fpList->GetHitIndex( i, j );
1000 AliITSpListItem pItemTmp2( fModule, index, 0. );
1001 // put the fScaleSize analog digits in only one
1002 for( Int_t ik=0; ik<fScaleSize; ik++ ) {
1003 AliITSpListItem *pItemTmp = fpList->GetpListItem(i,jdx+ik);
1004 if( pItemTmp == 0 ) continue;
1005 pItemTmp2.Add( pItemTmp );
1007 pItemTmp2.AddSignalAfterElect( fModule, index, sig );
1008 pItemTmp2.AddNoise(fModule,index,fHitNoiMap2->GetSignal(i,j));
1009 aliITS->AddSumDigit( pItemTmp2 );
1010 } // end if (sig > 0.2)
1015 //______________________________________________________________________
1016 void AliITSsimulationSDD::PrintStatus() const {
1017 // Print SDD simulation Parameters
1019 cout << "**************************************************" << endl;
1020 cout << " Silicon Drift Detector Simulation Parameters " << endl;
1021 cout << "**************************************************" << endl;
1022 cout << "Flag for Perpendicular tracks: " << (Int_t) fFlag << endl;
1023 cout << "Flag to switch off electronics: " << (Int_t) fDoFFT << endl;
1024 cout << "Number of Anodes used: " << fNofMaps << endl;
1025 cout << "Number of Time Samples: " << fMaxNofSamples << endl;
1026 cout << "Scale size factor: " << fScaleSize << endl;
1027 cout << "**************************************************" << endl;