possiblity to read ESD friends and TPC outer check (Jacek)
[u/mrichter/AliRoot.git] / EMCAL / AliEMCALRawUtils.cxx
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ee299369 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/* $Id$ */
ee299369 17
e5bbbc4e 18//_________________________________________________________________________
19// Utility Class for handling Raw data
20// Does all transitions from Digits to Raw and vice versa,
21// for simu and reconstruction
22//
23// Note: the current version is still simplified. Only
24// one raw signal per digit is generated; either high-gain or low-gain
25// Need to add concurrent high and low-gain info in the future
26// No pedestal is added to the raw signal.
ee299369 27//*-- Author: Marco van Leeuwen (LBL)
e5bbbc4e 28
ee299369 29#include "AliEMCALRawUtils.h"
21cad85c 30
ee299369 31#include "TF1.h"
32#include "TGraph.h"
e5bbbc4e 33class TSystem;
21cad85c 34
e5bbbc4e 35class AliLog;
72c58de0 36#include "AliRun.h"
ee299369 37#include "AliRunLoader.h"
e5bbbc4e 38class AliCaloAltroMapping;
ee299369 39#include "AliAltroBuffer.h"
40#include "AliRawReader.h"
32cd4c24 41#include "AliCaloRawStreamV3.h"
ee299369 42#include "AliDAQ.h"
21cad85c 43
feedcab9 44#include "AliEMCALRecParam.h"
ee299369 45#include "AliEMCALLoader.h"
46#include "AliEMCALGeometry.h"
e5bbbc4e 47class AliEMCALDigitizer;
ee299369 48#include "AliEMCALDigit.h"
20b636fc 49#include "AliEMCAL.h"
21cad85c 50
ee299369 51ClassImp(AliEMCALRawUtils)
21cad85c 52
ee299369 53// Signal shape parameters
e5bbbc4e 54Double_t AliEMCALRawUtils::fgTimeBinWidth = 100E-9 ; // each sample is 100 ns
ee299369 55Double_t AliEMCALRawUtils::fgTimeTrigger = 1.5E-6 ; // 15 time bins ~ 1.5 musec
56
57// some digitization constants
58Int_t AliEMCALRawUtils::fgThreshold = 1;
59Int_t AliEMCALRawUtils::fgDDLPerSuperModule = 2; // 2 ddls per SuperModule
e5bbbc4e 60Int_t AliEMCALRawUtils::fgPedestalValue = 32; // pedestal value for digits2raw
61Double_t AliEMCALRawUtils::fgFEENoise = 3.; // 3 ADC channels of noise (sampled)
ee299369 62
8cb998bd 63AliEMCALRawUtils::AliEMCALRawUtils()
b4133f05 64 : fHighLowGainFactor(0.), fOrder(0), fTau(0.), fNoiseThreshold(0),
65 fNPedSamples(0), fGeom(0), fOption("")
8cb998bd 66{
b4133f05 67
68 //These are default parameters.
69 //Can be re-set from without with setter functions
ee299369 70 fHighLowGainFactor = 16. ; // adjusted for a low gain range of 82 GeV (10 bits)
b4133f05 71 fOrder = 2; // order of gamma fn
72 fTau = 2.35; // in units of timebin, from CERN 2007 testbeam
73 fNoiseThreshold = 3;
74 fNPedSamples = 5;
65bdc82f 75
76 //Get Mapping RCU files from the AliEMCALRecParam
77 const TObjArray* maps = AliEMCALRecParam::GetMappings();
78 if(!maps) AliFatal("Cannot retrieve ALTRO mappings!!");
79
21cad85c 80 for(Int_t i = 0; i < 4; i++) {
65bdc82f 81 fMapping[i] = (AliAltroMapping*)maps->At(i);
82 }
83
72c58de0 84 //To make sure we match with the geometry in a simulation file,
85 //let's try to get it first. If not, take the default geometry
33c3c91a 86 AliRunLoader *rl = AliRunLoader::Instance();
c61fe3b4 87 if(!rl) AliError("Cannot find RunLoader!");
72c58de0 88 if (rl->GetAliRun() && rl->GetAliRun()->GetDetector("EMCAL")) {
89 fGeom = dynamic_cast<AliEMCAL*>(rl->GetAliRun()->GetDetector("EMCAL"))->GetGeometry();
90 } else {
91 AliInfo(Form("Using default geometry in raw reco"));
937d0661 92 fGeom = AliEMCALGeometry::GetInstance(AliEMCALGeometry::GetDefaultGeometryName());
65bdc82f 93 }
94
72c58de0 95 if(!fGeom) AliFatal(Form("Could not get geometry!"));
96
65bdc82f 97}
98
99//____________________________________________________________________________
5544799a 100AliEMCALRawUtils::AliEMCALRawUtils(AliEMCALGeometry *pGeometry)
101 : fHighLowGainFactor(0.), fOrder(0), fTau(0.), fNoiseThreshold(0),
102 fNPedSamples(0), fGeom(pGeometry), fOption("")
103{
104 //
105 // Initialize with the given geometry - constructor required by HLT
106 // HLT does not use/support AliRunLoader(s) instances
107 // This is a minimum intervention solution
108 // Comment by MPloskon@lbl.gov
109 //
110
111 //These are default parameters.
112 //Can be re-set from without with setter functions
113 fHighLowGainFactor = 16. ; // adjusted for a low gain range of 82 GeV (10 bits)
114 fOrder = 2; // order of gamma fn
115 fTau = 2.35; // in units of timebin, from CERN 2007 testbeam
116 fNoiseThreshold = 3;
117 fNPedSamples = 5;
118
119 //Get Mapping RCU files from the AliEMCALRecParam
120 const TObjArray* maps = AliEMCALRecParam::GetMappings();
121 if(!maps) AliFatal("Cannot retrieve ALTRO mappings!!");
122
21cad85c 123 for(Int_t i = 0; i < 4; i++) {
5544799a 124 fMapping[i] = (AliAltroMapping*)maps->At(i);
125 }
126
127 if(!fGeom) AliFatal(Form("Could not get geometry!"));
128
129}
130
131//____________________________________________________________________________
65bdc82f 132AliEMCALRawUtils::AliEMCALRawUtils(const AliEMCALRawUtils& rawU)
133 : TObject(),
134 fHighLowGainFactor(rawU.fHighLowGainFactor),
b4133f05 135 fOrder(rawU.fOrder),
136 fTau(rawU.fTau),
137 fNoiseThreshold(rawU.fNoiseThreshold),
138 fNPedSamples(rawU.fNPedSamples),
65bdc82f 139 fGeom(rawU.fGeom),
140 fOption(rawU.fOption)
141{
142 //copy ctor
143 fMapping[0] = rawU.fMapping[0];
144 fMapping[1] = rawU.fMapping[1];
21cad85c 145 fMapping[2] = rawU.fMapping[2];
146 fMapping[3] = rawU.fMapping[3];
65bdc82f 147}
148
149//____________________________________________________________________________
150AliEMCALRawUtils& AliEMCALRawUtils::operator =(const AliEMCALRawUtils &rawU)
151{
152 //assignment operator
153
154 if(this != &rawU) {
155 fHighLowGainFactor = rawU.fHighLowGainFactor;
b4133f05 156 fOrder = rawU.fOrder;
157 fTau = rawU.fTau;
158 fNoiseThreshold = rawU.fNoiseThreshold;
159 fNPedSamples = rawU.fNPedSamples;
65bdc82f 160 fGeom = rawU.fGeom;
161 fOption = rawU.fOption;
162 fMapping[0] = rawU.fMapping[0];
163 fMapping[1] = rawU.fMapping[1];
21cad85c 164 fMapping[2] = rawU.fMapping[2];
165 fMapping[3] = rawU.fMapping[3];
65bdc82f 166 }
167
168 return *this;
169
ee299369 170}
65bdc82f 171
ee299369 172//____________________________________________________________________________
173AliEMCALRawUtils::~AliEMCALRawUtils() {
e5bbbc4e 174 //dtor
65bdc82f 175
ee299369 176}
65bdc82f 177
ee299369 178//____________________________________________________________________________
65bdc82f 179void AliEMCALRawUtils::Digits2Raw()
ee299369 180{
181 // convert digits of the current event to raw data
182
33c3c91a 183 AliRunLoader *rl = AliRunLoader::Instance();
ee299369 184 AliEMCALLoader *loader = dynamic_cast<AliEMCALLoader*>(rl->GetDetectorLoader("EMCAL"));
185
186 // get the digits
187 loader->LoadDigits("EMCAL");
188 loader->GetEvent();
189 TClonesArray* digits = loader->Digits() ;
190
191 if (!digits) {
192 Warning("Digits2Raw", "no digits found !");
193 return;
194 }
65bdc82f 195
ee299369 196 static const Int_t nDDL = 12*2; // 12 SM hardcoded for now. Buffers allocated dynamically, when needed, so just need an upper limit here
197 AliAltroBuffer* buffers[nDDL];
198 for (Int_t i=0; i < nDDL; i++)
199 buffers[i] = 0;
200
201 Int_t adcValuesLow[fgkTimeBins];
202 Int_t adcValuesHigh[fgkTimeBins];
203
ee299369 204 // loop over digits (assume ordered digits)
205 for (Int_t iDigit = 0; iDigit < digits->GetEntries(); iDigit++) {
206 AliEMCALDigit* digit = dynamic_cast<AliEMCALDigit *>(digits->At(iDigit)) ;
207 if (digit->GetAmp() < fgThreshold)
208 continue;
209
210 //get cell indices
211 Int_t nSM = 0;
212 Int_t nIphi = 0;
213 Int_t nIeta = 0;
214 Int_t iphi = 0;
215 Int_t ieta = 0;
216 Int_t nModule = 0;
65bdc82f 217 fGeom->GetCellIndex(digit->GetId(), nSM, nModule, nIphi, nIeta);
218 fGeom->GetCellPhiEtaIndexInSModule(nSM, nModule, nIphi, nIeta,iphi, ieta) ;
ee299369 219
21cad85c 220 //Check which is the RCU, 0 or 1, of the cell.
ee299369 221 Int_t iRCU = -111;
222 //RCU0
223 if (0<=iphi&&iphi<8) iRCU=0; // first cable row
224 else if (8<=iphi&&iphi<16 && 0<=ieta&&ieta<24) iRCU=0; // first half;
225 //second cable row
226 //RCU1
227 else if(8<=iphi&&iphi<16 && 24<=ieta&&ieta<48) iRCU=1; // second half;
228 //second cable row
229 else if(16<=iphi&&iphi<24) iRCU=1; // third cable row
21cad85c 230
231 if (nSM%2==1) iRCU = 1 - iRCU; // swap for odd=C side, to allow us to cable both sides the same
232
e36e3bcf 233 if (iRCU<0)
234 Fatal("Digits2Raw()","Non-existent RCU number: %d", iRCU);
ee299369 235
236 //Which DDL?
237 Int_t iDDL = fgDDLPerSuperModule* nSM + iRCU;
238 if (iDDL >= nDDL)
239 Fatal("Digits2Raw()","Non-existent DDL board number: %d", iDDL);
240
241 if (buffers[iDDL] == 0) {
242 // open new file and write dummy header
243 TString fileName = AliDAQ::DdlFileName("EMCAL",iDDL);
21cad85c 244 //Select mapping file RCU0A, RCU0C, RCU1A, RCU1C
245 Int_t iRCUside=iRCU+(nSM%2)*2;
246 //iRCU=0 and even (0) SM -> RCU0A.data 0
247 //iRCU=1 and even (0) SM -> RCU1A.data 1
248 //iRCU=0 and odd (1) SM -> RCU0C.data 2
249 //iRCU=1 and odd (1) SM -> RCU1C.data 3
250 //cout<<" nSM "<<nSM<<"; iRCU "<<iRCU<<"; iRCUside "<<iRCUside<<endl;
251 buffers[iDDL] = new AliAltroBuffer(fileName.Data(),fMapping[iRCUside]);
ee299369 252 buffers[iDDL]->WriteDataHeader(kTRUE, kFALSE); //Dummy;
253 }
254
255 // out of time range signal (?)
256 if (digit->GetTimeR() > GetRawFormatTimeMax() ) {
257 AliInfo("Signal is out of time range.\n");
258 buffers[iDDL]->FillBuffer((Int_t)digit->GetAmp());
259 buffers[iDDL]->FillBuffer(GetRawFormatTimeBins() ); // time bin
260 buffers[iDDL]->FillBuffer(3); // bunch length
261 buffers[iDDL]->WriteTrailer(3, ieta, iphi, nSM); // trailer
262 // calculate the time response function
263 } else {
264 Bool_t lowgain = RawSampledResponse(digit->GetTimeR(), digit->GetAmp(), adcValuesHigh, adcValuesLow) ;
265 if (lowgain)
266 buffers[iDDL]->WriteChannel(ieta, iphi, 0, GetRawFormatTimeBins(), adcValuesLow, fgThreshold);
267 else
268 buffers[iDDL]->WriteChannel(ieta,iphi, 1, GetRawFormatTimeBins(), adcValuesHigh, fgThreshold);
269 }
270 }
271
272 // write headers and close files
273 for (Int_t i=0; i < nDDL; i++) {
274 if (buffers[i]) {
275 buffers[i]->Flush();
276 buffers[i]->WriteDataHeader(kFALSE, kFALSE);
277 delete buffers[i];
278 }
279 }
65bdc82f 280
ee299369 281 loader->UnloadDigits();
282}
283
284//____________________________________________________________________________
65bdc82f 285void AliEMCALRawUtils::Raw2Digits(AliRawReader* reader,TClonesArray *digitsArr)
ee299369 286{
65bdc82f 287 // convert raw data of the current event to digits
ee299369 288
c47157cd 289 digitsArr->Clear();
ee299369 290
c47157cd 291 if (!digitsArr) {
ee299369 292 Error("Raw2Digits", "no digits found !");
293 return;
294 }
295 if (!reader) {
296 Error("Raw2Digits", "no raw reader found !");
297 return;
298 }
299
32cd4c24 300 AliCaloRawStreamV3 in(reader,"EMCAL",fMapping);
ee299369 301 // Select EMCAL DDL's;
302 reader->Select("EMCAL");
feedcab9 303
8cb998bd 304 //Updated fitting routine from 2007 beam test takes into account
305 //possibility of two peaks in data and selects first one for fitting
306 //Also sets some of the starting parameters based on the shape of the
307 //given raw signal being fit
308
309 TF1 * signalF = new TF1("signal", RawResponseFunction, 0, GetRawFormatTimeBins(), 5);
b4133f05 310 signalF->SetParameters(10.,0.,fTau,fOrder,5.); //set all defaults once, just to be safe
8cb998bd 311 signalF->SetParNames("amp","t0","tau","N","ped");
b4133f05 312 signalF->SetParameter(2,fTau); // tau in units of time bin
8cb998bd 313 signalF->SetParLimits(2,2,-1);
b4133f05 314 signalF->SetParameter(3,fOrder); // order
8cb998bd 315 signalF->SetParLimits(3,2,-1);
48a56166 316
ee299369 317 Int_t id = -1;
82cbdfca 318 Float_t time = 0. ;
319 Float_t amp = 0. ;
32cd4c24 320 Int_t i = 0;
321 Int_t startBin = 0;
ee299369 322
8cb998bd 323 //Graph to hold data we will fit (should be converted to an array
324 //later to speed up processing
325 TGraph * gSig = new TGraph(GetRawFormatTimeBins());
ee299369 326
ee299369 327 Int_t lowGain = 0;
e5bbbc4e 328 Int_t caloFlag = 0; // low, high gain, or TRU, or LED ref.
ee299369 329
32cd4c24 330 // start loop over input stream
331 while (in.NextDDL()) {
332 while (in.NextChannel()) {
8cb998bd 333
32cd4c24 334 id = fGeom->GetAbsCellIdFromCellIndexes(in.GetModule(), in.GetRow(), in.GetColumn()) ;
335 caloFlag = in.GetCaloFlag();
336 lowGain = in.IsLowGain();
337
338 // There can be zero-suppression in the raw data,
339 // so set up the TGraph in advance
340 for (i=0; i < GetRawFormatTimeBins(); i++) {
341 gSig->SetPoint(i, i , 0);
342 }
d8ada134 343
32cd4c24 344 Int_t maxTime = 0;
345
346 while (in.NextBunch()) {
347 const UShort_t *sig = in.GetSignals();
348 startBin = in.GetStartTimeBin();
349
d8ada134 350 if (((UInt_t) maxTime) < in.GetStartTimeBin()) {
32cd4c24 351 maxTime = in.GetStartTimeBin(); // timebins come in reverse order
352 }
353
354 if (maxTime < 0 || maxTime >= GetRawFormatTimeBins()) {
355 AliWarning(Form("Invalid time bin %d",maxTime));
356 maxTime = GetRawFormatTimeBins();
357 }
358
359 for (i = 0; i < in.GetBunchLength(); i++) {
360 time = startBin--;
361 gSig->SetPoint(time, time, sig[i]) ;
362 }
363 } // loop over bunches
364
365 gSig->Set(maxTime+1);
366 FitRaw(gSig, signalF, amp, time) ;
ee299369 367
32cd4c24 368 if (caloFlag == 0 || caloFlag == 1) { // low gain or high gain
369 if (amp > 0 && amp < 2000) { //check both high and low end of
e5bbbc4e 370 //result, 2000 is somewhat arbitrary - not nice with magic numbers in the code..
32cd4c24 371 AliDebug(2,Form("id %d lowGain %d amp %g", id, lowGain, amp));
ee299369 372
32cd4c24 373 AddDigit(digitsArr, id, lowGain, (Int_t)amp, time);
374 }
e5bbbc4e 375
32cd4c24 376 }
e5bbbc4e 377
32cd4c24 378 // Reset graph
379 for (Int_t index = 0; index < gSig->GetN(); index++) {
380 gSig->SetPoint(index, index, 0) ;
381 }
382 // Reset starting parameters for fit function
383 signalF->SetParameters(10.,0.,fTau,fOrder,5.); //reset all defaults just to be safe
48a56166 384
32cd4c24 385 } // end while over channel
386 } //end while over DDL's, of input stream
ee299369 387
388 delete signalF ;
389 delete gSig;
390
391 return ;
392}
393
394//____________________________________________________________________________
82cbdfca 395void AliEMCALRawUtils::AddDigit(TClonesArray *digitsArr, Int_t id, Int_t lowGain, Int_t amp, Float_t time) {
396 //
397 // Add a new digit.
398 // This routine checks whether a digit exists already for this tower
399 // and then decides whether to use the high or low gain info
400 //
401 // Called by Raw2Digits
402
403 AliEMCALDigit *digit = 0, *tmpdigit = 0;
404
405 TIter nextdigit(digitsArr);
406 while (digit == 0 && (tmpdigit = (AliEMCALDigit*) nextdigit())) {
407 if (tmpdigit->GetId() == id)
408 digit = tmpdigit;
409 }
410
411 if (!digit) { // no digit existed for this tower; create one
412 if (lowGain)
413 amp = Int_t(fHighLowGainFactor * amp);
414 Int_t idigit = digitsArr->GetEntries();
415 new((*digitsArr)[idigit]) AliEMCALDigit( -1, -1, id, amp, time, idigit) ;
416 }
417 else { // a digit already exists, check range
b4133f05 418 // (use high gain if signal < cut value, otherwise low gain)
82cbdfca 419 if (lowGain) { // new digit is low gain
b4133f05 420 if (digit->GetAmp() > fgkOverflowCut) { // use if stored digit is out of range
82cbdfca 421 digit->SetAmp(Int_t(fHighLowGainFactor * amp));
422 digit->SetTime(time);
423 }
424 }
b4133f05 425 else if (amp < fgkOverflowCut) { // new digit is high gain; use if not out of range
82cbdfca 426 digit->SetAmp(amp);
427 digit->SetTime(time);
428 }
429 }
430}
431
432//____________________________________________________________________________
e5bbbc4e 433void AliEMCALRawUtils::FitRaw(TGraph * gSig, TF1* signalF, Float_t & amp, Float_t & time) const
ee299369 434{
435 // Fits the raw signal time distribution; from AliEMCALGetter
436
ee299369 437 amp = time = 0. ;
82cbdfca 438 Double_t ped = 0;
439 Int_t nPed = 0;
ee299369 440
b4133f05 441 for (Int_t index = 0; index < fNPedSamples; index++) {
e9dbb64a 442 Double_t ttime, signal;
82cbdfca 443 gSig->GetPoint(index, ttime, signal) ;
444 if (signal > 0) {
445 ped += signal;
446 nPed++;
ee299369 447 }
448 }
e9dbb64a 449
82cbdfca 450 if (nPed > 0)
451 ped /= nPed;
e9dbb64a 452 else {
8cb998bd 453 AliWarning("Could not determine pedestal");
82cbdfca 454 ped = 10; // put some small value as first guess
e9dbb64a 455 }
82cbdfca 456
e5bbbc4e 457 Int_t maxFound = 0;
458 Int_t iMax = 0;
e9dbb64a 459 Float_t max = -1;
e5bbbc4e 460 Float_t maxFit = gSig->GetN();
461 Float_t minAfterSig = 9999;
462 Int_t tminAfterSig = gSig->GetN();
463 Int_t nPedAfterSig = 0;
464 Int_t plateauWidth = 0;
465 Int_t plateauStart = 9999;
466 Float_t cut = 0.3;
e9dbb64a 467
b4133f05 468 for (Int_t i=fNPedSamples; i < gSig->GetN(); i++) {
e9dbb64a 469 Double_t ttime, signal;
470 gSig->GetPoint(i, ttime, signal) ;
e5bbbc4e 471 if (!maxFound && signal > max) {
472 iMax = i;
e9dbb64a 473 max = signal;
474 }
b4133f05 475 else if ( max > ped + fNoiseThreshold ) {
e5bbbc4e 476 maxFound = 1;
477 minAfterSig = signal;
478 tminAfterSig = i;
e9dbb64a 479 }
e5bbbc4e 480 if (maxFound) {
481 if ( signal < minAfterSig) {
482 minAfterSig = signal;
483 tminAfterSig = i;
e9dbb64a 484 }
e5bbbc4e 485 if (i > tminAfterSig + 5) { // Two close peaks; end fit at minimum
486 maxFit = tminAfterSig;
e9dbb64a 487 break;
488 }
e5bbbc4e 489 if ( signal < cut*max){ //stop fit at 30% amplitude(avoid the pulse shape falling edge)
490 maxFit = i;
c61fe3b4 491 break;
492 }
b4133f05 493 if ( signal < ped + fNoiseThreshold)
e5bbbc4e 494 nPedAfterSig++;
495 if (nPedAfterSig >= 5) { // include 5 pedestal bins after peak
496 maxFit = i;
e9dbb64a 497 break;
498 }
5a056daa 499 }
fb070798 500 //Add check on plateau
501 if (signal >= fgkRawSignalOverflow - fNoiseThreshold) {
e5bbbc4e 502 if(plateauWidth == 0) plateauStart = i;
503 plateauWidth++;
fb070798 504 }
505 }
506
e5bbbc4e 507 if(plateauWidth > 0) {
508 for(int j = 0; j < plateauWidth; j++) {
fb070798 509 //Note, have to remove the same point N times because after each
510 //remove, the positions of all subsequent points have shifted down
e5bbbc4e 511 gSig->RemovePoint(plateauStart);
fb070798 512 }
82cbdfca 513 }
5a056daa 514
b4133f05 515 if ( max - ped > fNoiseThreshold ) { // else its noise
e9dbb64a 516 AliDebug(2,Form("Fitting max %d ped %d", max, ped));
e5bbbc4e 517 signalF->SetRange(0,maxFit);
8cb998bd 518
519 if(max-ped > 50)
520 signalF->SetParLimits(2,1,3);
521
522 signalF->SetParameter(4, ped) ;
e5bbbc4e 523 signalF->SetParameter(1, iMax);
8cb998bd 524 signalF->SetParameter(0, max);
525
526 gSig->Fit(signalF, "QROW"); // Note option 'W': equal errors on all points
527 amp = signalF->GetParameter(0);
528 time = signalF->GetParameter(1)*GetRawFormatTimeBinWidth() - fgTimeTrigger;
ee299369 529 }
530 return;
531}
532//__________________________________________________________________
533Double_t AliEMCALRawUtils::RawResponseFunction(Double_t *x, Double_t *par)
534{
8cb998bd 535 // Matches version used in 2007 beam test
536 //
ee299369 537 // Shape of the electronics raw reponse:
538 // It is a semi-gaussian, 2nd order Gamma function of the general form
539 //
540 // t' = (t - t0 + tau) / tau
541 // F = A * t**N * exp( N * ( 1 - t) ) for t >= 0
542 // F = 0 for t < 0
543 //
544 // parameters:
8cb998bd 545 // A: par[0] // Amplitude = peak value
546 // t0: par[1]
547 // tau: par[2]
548 // N: par[3]
549 // ped: par[4]
ee299369 550 //
551 Double_t signal ;
8cb998bd 552 Double_t tau =par[2];
e5bbbc4e 553 Double_t n =par[3];
8cb998bd 554 Double_t ped = par[4];
555 Double_t xx = ( x[0] - par[1] + tau ) / tau ;
ee299369 556
5a056daa 557 if (xx <= 0)
8cb998bd 558 signal = ped ;
ee299369 559 else {
e5bbbc4e 560 signal = ped + par[0] * TMath::Power(xx , n) * TMath::Exp(n * (1 - xx )) ;
ee299369 561 }
562 return signal ;
563}
564
565//__________________________________________________________________
566Bool_t AliEMCALRawUtils::RawSampledResponse(
567const Double_t dtime, const Double_t damp, Int_t * adcH, Int_t * adcL) const
568{
569 // for a start time dtime and an amplitude damp given by digit,
570 // calculates the raw sampled response AliEMCAL::RawResponseFunction
571
ee299369 572 Bool_t lowGain = kFALSE ;
573
48a56166 574 // A: par[0] // Amplitude = peak value
575 // t0: par[1]
576 // tau: par[2]
577 // N: par[3]
578 // ped: par[4]
579
56e13066 580 TF1 signalF("signal", RawResponseFunction, 0, GetRawFormatTimeBins(), 5);
48a56166 581 signalF.SetParameter(0, damp) ;
56e13066 582 signalF.SetParameter(1, (dtime + fgTimeTrigger)/fgTimeBinWidth) ;
b4133f05 583 signalF.SetParameter(2, fTau) ;
584 signalF.SetParameter(3, fOrder);
fe93d365 585 signalF.SetParameter(4, fgPedestalValue);
ee299369 586
587 for (Int_t iTime = 0; iTime < GetRawFormatTimeBins(); iTime++) {
56e13066 588 Double_t signal = signalF.Eval(iTime) ;
fe93d365 589
590 //According to Terry Awes, 13-Apr-2008
591 //add gaussian noise in quadrature to each sample
592 //Double_t noise = gRandom->Gaus(0.,fgFEENoise);
593 //signal = sqrt(signal*signal + noise*noise);
594
ee299369 595 adcH[iTime] = static_cast<Int_t>(signal + 0.5) ;
b4133f05 596 if ( adcH[iTime] > fgkRawSignalOverflow ){ // larger than 10 bits
597 adcH[iTime] = fgkRawSignalOverflow ;
ee299369 598 lowGain = kTRUE ;
599 }
600
601 signal /= fHighLowGainFactor;
602
603 adcL[iTime] = static_cast<Int_t>(signal + 0.5) ;
b4133f05 604 if ( adcL[iTime] > fgkRawSignalOverflow) // larger than 10 bits
605 adcL[iTime] = fgkRawSignalOverflow ;
ee299369 606 }
607 return lowGain ;
608}