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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" | |
e2c2134b | 33 | #include <TRandom.h> |
e5bbbc4e | 34 | class TSystem; |
21cad85c | 35 | |
e5bbbc4e | 36 | class AliLog; |
72c58de0 | 37 | #include "AliRun.h" |
ee299369 | 38 | #include "AliRunLoader.h" |
e5bbbc4e | 39 | class AliCaloAltroMapping; |
ee299369 | 40 | #include "AliAltroBuffer.h" |
41 | #include "AliRawReader.h" | |
32cd4c24 | 42 | #include "AliCaloRawStreamV3.h" |
ee299369 | 43 | #include "AliDAQ.h" |
21cad85c | 44 | |
feedcab9 | 45 | #include "AliEMCALRecParam.h" |
ee299369 | 46 | #include "AliEMCALLoader.h" |
47 | #include "AliEMCALGeometry.h" | |
e5bbbc4e | 48 | class AliEMCALDigitizer; |
ee299369 | 49 | #include "AliEMCALDigit.h" |
20b636fc | 50 | #include "AliEMCAL.h" |
21cad85c | 51 | |
ee299369 | 52 | ClassImp(AliEMCALRawUtils) |
21cad85c | 53 | |
ee299369 | 54 | // Signal shape parameters |
e2c2134b | 55 | Int_t AliEMCALRawUtils::fgTimeBins = 256; // number of time bins for EMCAL |
e5bbbc4e | 56 | Double_t AliEMCALRawUtils::fgTimeBinWidth = 100E-9 ; // each sample is 100 ns |
09974781 | 57 | Double_t AliEMCALRawUtils::fgTimeTrigger = 1.5E-6 ; // 15 time bins ~ 1.5 musec |
ee299369 | 58 | |
59 | // some digitization constants | |
60 | Int_t AliEMCALRawUtils::fgThreshold = 1; | |
61 | Int_t AliEMCALRawUtils::fgDDLPerSuperModule = 2; // 2 ddls per SuperModule | |
e5bbbc4e | 62 | Int_t AliEMCALRawUtils::fgPedestalValue = 32; // pedestal value for digits2raw |
63 | Double_t AliEMCALRawUtils::fgFEENoise = 3.; // 3 ADC channels of noise (sampled) | |
ee299369 | 64 | |
8cb998bd | 65 | AliEMCALRawUtils::AliEMCALRawUtils() |
b4133f05 | 66 | : fHighLowGainFactor(0.), fOrder(0), fTau(0.), fNoiseThreshold(0), |
67 | fNPedSamples(0), fGeom(0), fOption("") | |
8cb998bd | 68 | { |
b4133f05 | 69 | |
70 | //These are default parameters. | |
71 | //Can be re-set from without with setter functions | |
ee299369 | 72 | fHighLowGainFactor = 16. ; // adjusted for a low gain range of 82 GeV (10 bits) |
b4133f05 | 73 | fOrder = 2; // order of gamma fn |
74 | fTau = 2.35; // in units of timebin, from CERN 2007 testbeam | |
75 | fNoiseThreshold = 3; | |
76 | fNPedSamples = 5; | |
65bdc82f | 77 | |
78 | //Get Mapping RCU files from the AliEMCALRecParam | |
79 | const TObjArray* maps = AliEMCALRecParam::GetMappings(); | |
80 | if(!maps) AliFatal("Cannot retrieve ALTRO mappings!!"); | |
81 | ||
21cad85c | 82 | for(Int_t i = 0; i < 4; i++) { |
65bdc82f | 83 | fMapping[i] = (AliAltroMapping*)maps->At(i); |
84 | } | |
85 | ||
72c58de0 | 86 | //To make sure we match with the geometry in a simulation file, |
87 | //let's try to get it first. If not, take the default geometry | |
33c3c91a | 88 | AliRunLoader *rl = AliRunLoader::Instance(); |
c61fe3b4 | 89 | if(!rl) AliError("Cannot find RunLoader!"); |
72c58de0 | 90 | if (rl->GetAliRun() && rl->GetAliRun()->GetDetector("EMCAL")) { |
91 | fGeom = dynamic_cast<AliEMCAL*>(rl->GetAliRun()->GetDetector("EMCAL"))->GetGeometry(); | |
92 | } else { | |
93 | AliInfo(Form("Using default geometry in raw reco")); | |
937d0661 | 94 | fGeom = AliEMCALGeometry::GetInstance(AliEMCALGeometry::GetDefaultGeometryName()); |
65bdc82f | 95 | } |
96 | ||
72c58de0 | 97 | if(!fGeom) AliFatal(Form("Could not get geometry!")); |
98 | ||
65bdc82f | 99 | } |
100 | ||
101 | //____________________________________________________________________________ | |
5544799a | 102 | AliEMCALRawUtils::AliEMCALRawUtils(AliEMCALGeometry *pGeometry) |
103 | : fHighLowGainFactor(0.), fOrder(0), fTau(0.), fNoiseThreshold(0), | |
104 | fNPedSamples(0), fGeom(pGeometry), fOption("") | |
105 | { | |
106 | // | |
107 | // Initialize with the given geometry - constructor required by HLT | |
108 | // HLT does not use/support AliRunLoader(s) instances | |
109 | // This is a minimum intervention solution | |
110 | // Comment by MPloskon@lbl.gov | |
111 | // | |
112 | ||
113 | //These are default parameters. | |
114 | //Can be re-set from without with setter functions | |
115 | fHighLowGainFactor = 16. ; // adjusted for a low gain range of 82 GeV (10 bits) | |
116 | fOrder = 2; // order of gamma fn | |
117 | fTau = 2.35; // in units of timebin, from CERN 2007 testbeam | |
118 | fNoiseThreshold = 3; | |
119 | fNPedSamples = 5; | |
120 | ||
121 | //Get Mapping RCU files from the AliEMCALRecParam | |
122 | const TObjArray* maps = AliEMCALRecParam::GetMappings(); | |
123 | if(!maps) AliFatal("Cannot retrieve ALTRO mappings!!"); | |
124 | ||
21cad85c | 125 | for(Int_t i = 0; i < 4; i++) { |
5544799a | 126 | fMapping[i] = (AliAltroMapping*)maps->At(i); |
127 | } | |
128 | ||
129 | if(!fGeom) AliFatal(Form("Could not get geometry!")); | |
130 | ||
131 | } | |
132 | ||
133 | //____________________________________________________________________________ | |
65bdc82f | 134 | AliEMCALRawUtils::AliEMCALRawUtils(const AliEMCALRawUtils& rawU) |
135 | : TObject(), | |
136 | fHighLowGainFactor(rawU.fHighLowGainFactor), | |
b4133f05 | 137 | fOrder(rawU.fOrder), |
138 | fTau(rawU.fTau), | |
139 | fNoiseThreshold(rawU.fNoiseThreshold), | |
140 | fNPedSamples(rawU.fNPedSamples), | |
65bdc82f | 141 | fGeom(rawU.fGeom), |
142 | fOption(rawU.fOption) | |
143 | { | |
144 | //copy ctor | |
145 | fMapping[0] = rawU.fMapping[0]; | |
146 | fMapping[1] = rawU.fMapping[1]; | |
21cad85c | 147 | fMapping[2] = rawU.fMapping[2]; |
148 | fMapping[3] = rawU.fMapping[3]; | |
65bdc82f | 149 | } |
150 | ||
151 | //____________________________________________________________________________ | |
152 | AliEMCALRawUtils& AliEMCALRawUtils::operator =(const AliEMCALRawUtils &rawU) | |
153 | { | |
154 | //assignment operator | |
155 | ||
156 | if(this != &rawU) { | |
157 | fHighLowGainFactor = rawU.fHighLowGainFactor; | |
b4133f05 | 158 | fOrder = rawU.fOrder; |
159 | fTau = rawU.fTau; | |
160 | fNoiseThreshold = rawU.fNoiseThreshold; | |
161 | fNPedSamples = rawU.fNPedSamples; | |
65bdc82f | 162 | fGeom = rawU.fGeom; |
163 | fOption = rawU.fOption; | |
164 | fMapping[0] = rawU.fMapping[0]; | |
165 | fMapping[1] = rawU.fMapping[1]; | |
21cad85c | 166 | fMapping[2] = rawU.fMapping[2]; |
167 | fMapping[3] = rawU.fMapping[3]; | |
65bdc82f | 168 | } |
169 | ||
170 | return *this; | |
171 | ||
ee299369 | 172 | } |
65bdc82f | 173 | |
ee299369 | 174 | //____________________________________________________________________________ |
175 | AliEMCALRawUtils::~AliEMCALRawUtils() { | |
e5bbbc4e | 176 | //dtor |
65bdc82f | 177 | |
ee299369 | 178 | } |
65bdc82f | 179 | |
ee299369 | 180 | //____________________________________________________________________________ |
65bdc82f | 181 | void AliEMCALRawUtils::Digits2Raw() |
ee299369 | 182 | { |
183 | // convert digits of the current event to raw data | |
184 | ||
33c3c91a | 185 | AliRunLoader *rl = AliRunLoader::Instance(); |
ee299369 | 186 | AliEMCALLoader *loader = dynamic_cast<AliEMCALLoader*>(rl->GetDetectorLoader("EMCAL")); |
187 | ||
188 | // get the digits | |
189 | loader->LoadDigits("EMCAL"); | |
190 | loader->GetEvent(); | |
191 | TClonesArray* digits = loader->Digits() ; | |
192 | ||
193 | if (!digits) { | |
194 | Warning("Digits2Raw", "no digits found !"); | |
195 | return; | |
196 | } | |
65bdc82f | 197 | |
ee299369 | 198 | static const Int_t nDDL = 12*2; // 12 SM hardcoded for now. Buffers allocated dynamically, when needed, so just need an upper limit here |
199 | AliAltroBuffer* buffers[nDDL]; | |
200 | for (Int_t i=0; i < nDDL; i++) | |
201 | buffers[i] = 0; | |
202 | ||
e2c2134b | 203 | TArrayI adcValuesLow(fgTimeBins); |
204 | TArrayI adcValuesHigh(fgTimeBins); | |
ee299369 | 205 | |
ee299369 | 206 | // loop over digits (assume ordered digits) |
207 | for (Int_t iDigit = 0; iDigit < digits->GetEntries(); iDigit++) { | |
208 | AliEMCALDigit* digit = dynamic_cast<AliEMCALDigit *>(digits->At(iDigit)) ; | |
209 | if (digit->GetAmp() < fgThreshold) | |
210 | continue; | |
211 | ||
212 | //get cell indices | |
213 | Int_t nSM = 0; | |
214 | Int_t nIphi = 0; | |
215 | Int_t nIeta = 0; | |
216 | Int_t iphi = 0; | |
217 | Int_t ieta = 0; | |
218 | Int_t nModule = 0; | |
65bdc82f | 219 | fGeom->GetCellIndex(digit->GetId(), nSM, nModule, nIphi, nIeta); |
220 | fGeom->GetCellPhiEtaIndexInSModule(nSM, nModule, nIphi, nIeta,iphi, ieta) ; | |
ee299369 | 221 | |
21cad85c | 222 | //Check which is the RCU, 0 or 1, of the cell. |
ee299369 | 223 | Int_t iRCU = -111; |
224 | //RCU0 | |
225 | if (0<=iphi&&iphi<8) iRCU=0; // first cable row | |
226 | else if (8<=iphi&&iphi<16 && 0<=ieta&&ieta<24) iRCU=0; // first half; | |
227 | //second cable row | |
228 | //RCU1 | |
229 | else if(8<=iphi&&iphi<16 && 24<=ieta&&ieta<48) iRCU=1; // second half; | |
230 | //second cable row | |
231 | else if(16<=iphi&&iphi<24) iRCU=1; // third cable row | |
21cad85c | 232 | |
233 | if (nSM%2==1) iRCU = 1 - iRCU; // swap for odd=C side, to allow us to cable both sides the same | |
234 | ||
e36e3bcf | 235 | if (iRCU<0) |
236 | Fatal("Digits2Raw()","Non-existent RCU number: %d", iRCU); | |
ee299369 | 237 | |
238 | //Which DDL? | |
239 | Int_t iDDL = fgDDLPerSuperModule* nSM + iRCU; | |
240 | if (iDDL >= nDDL) | |
241 | Fatal("Digits2Raw()","Non-existent DDL board number: %d", iDDL); | |
242 | ||
243 | if (buffers[iDDL] == 0) { | |
244 | // open new file and write dummy header | |
245 | TString fileName = AliDAQ::DdlFileName("EMCAL",iDDL); | |
21cad85c | 246 | //Select mapping file RCU0A, RCU0C, RCU1A, RCU1C |
247 | Int_t iRCUside=iRCU+(nSM%2)*2; | |
248 | //iRCU=0 and even (0) SM -> RCU0A.data 0 | |
249 | //iRCU=1 and even (0) SM -> RCU1A.data 1 | |
250 | //iRCU=0 and odd (1) SM -> RCU0C.data 2 | |
251 | //iRCU=1 and odd (1) SM -> RCU1C.data 3 | |
252 | //cout<<" nSM "<<nSM<<"; iRCU "<<iRCU<<"; iRCUside "<<iRCUside<<endl; | |
253 | buffers[iDDL] = new AliAltroBuffer(fileName.Data(),fMapping[iRCUside]); | |
ee299369 | 254 | buffers[iDDL]->WriteDataHeader(kTRUE, kFALSE); //Dummy; |
255 | } | |
256 | ||
257 | // out of time range signal (?) | |
258 | if (digit->GetTimeR() > GetRawFormatTimeMax() ) { | |
259 | AliInfo("Signal is out of time range.\n"); | |
260 | buffers[iDDL]->FillBuffer((Int_t)digit->GetAmp()); | |
261 | buffers[iDDL]->FillBuffer(GetRawFormatTimeBins() ); // time bin | |
262 | buffers[iDDL]->FillBuffer(3); // bunch length | |
263 | buffers[iDDL]->WriteTrailer(3, ieta, iphi, nSM); // trailer | |
264 | // calculate the time response function | |
265 | } else { | |
e2c2134b | 266 | Bool_t lowgain = RawSampledResponse(digit->GetTimeR(), digit->GetAmp(), adcValuesHigh.GetArray(), adcValuesLow.GetArray()) ; |
ee299369 | 267 | if (lowgain) |
e2c2134b | 268 | buffers[iDDL]->WriteChannel(ieta, iphi, 0, GetRawFormatTimeBins(), adcValuesLow.GetArray(), fgThreshold); |
ee299369 | 269 | else |
e2c2134b | 270 | buffers[iDDL]->WriteChannel(ieta,iphi, 1, GetRawFormatTimeBins(), adcValuesHigh.GetArray(), fgThreshold); |
ee299369 | 271 | } |
272 | } | |
273 | ||
274 | // write headers and close files | |
275 | for (Int_t i=0; i < nDDL; i++) { | |
276 | if (buffers[i]) { | |
277 | buffers[i]->Flush(); | |
278 | buffers[i]->WriteDataHeader(kFALSE, kFALSE); | |
279 | delete buffers[i]; | |
280 | } | |
281 | } | |
65bdc82f | 282 | |
ee299369 | 283 | loader->UnloadDigits(); |
284 | } | |
285 | ||
286 | //____________________________________________________________________________ | |
65bdc82f | 287 | void AliEMCALRawUtils::Raw2Digits(AliRawReader* reader,TClonesArray *digitsArr) |
ee299369 | 288 | { |
65bdc82f | 289 | // convert raw data of the current event to digits |
ee299369 | 290 | |
c47157cd | 291 | digitsArr->Clear(); |
ee299369 | 292 | |
c47157cd | 293 | if (!digitsArr) { |
ee299369 | 294 | Error("Raw2Digits", "no digits found !"); |
295 | return; | |
296 | } | |
297 | if (!reader) { | |
298 | Error("Raw2Digits", "no raw reader found !"); | |
299 | return; | |
300 | } | |
301 | ||
32cd4c24 | 302 | AliCaloRawStreamV3 in(reader,"EMCAL",fMapping); |
ee299369 | 303 | // Select EMCAL DDL's; |
304 | reader->Select("EMCAL"); | |
feedcab9 | 305 | |
8cb998bd | 306 | //Updated fitting routine from 2007 beam test takes into account |
307 | //possibility of two peaks in data and selects first one for fitting | |
308 | //Also sets some of the starting parameters based on the shape of the | |
309 | //given raw signal being fit | |
310 | ||
311 | TF1 * signalF = new TF1("signal", RawResponseFunction, 0, GetRawFormatTimeBins(), 5); | |
b4133f05 | 312 | signalF->SetParameters(10.,0.,fTau,fOrder,5.); //set all defaults once, just to be safe |
8cb998bd | 313 | signalF->SetParNames("amp","t0","tau","N","ped"); |
b4133f05 | 314 | signalF->SetParameter(2,fTau); // tau in units of time bin |
8cb998bd | 315 | signalF->SetParLimits(2,2,-1); |
b4133f05 | 316 | signalF->SetParameter(3,fOrder); // order |
8cb998bd | 317 | signalF->SetParLimits(3,2,-1); |
48a56166 | 318 | |
ee299369 | 319 | Int_t id = -1; |
82cbdfca | 320 | Float_t time = 0. ; |
321 | Float_t amp = 0. ; | |
32cd4c24 | 322 | Int_t i = 0; |
323 | Int_t startBin = 0; | |
ee299369 | 324 | |
8cb998bd | 325 | //Graph to hold data we will fit (should be converted to an array |
326 | //later to speed up processing | |
327 | TGraph * gSig = new TGraph(GetRawFormatTimeBins()); | |
ee299369 | 328 | |
ee299369 | 329 | Int_t lowGain = 0; |
e5bbbc4e | 330 | Int_t caloFlag = 0; // low, high gain, or TRU, or LED ref. |
ee299369 | 331 | |
32cd4c24 | 332 | // start loop over input stream |
333 | while (in.NextDDL()) { | |
334 | while (in.NextChannel()) { | |
8cb998bd | 335 | |
32cd4c24 | 336 | // There can be zero-suppression in the raw data, |
337 | // so set up the TGraph in advance | |
338 | for (i=0; i < GetRawFormatTimeBins(); i++) { | |
339 | gSig->SetPoint(i, i , 0); | |
340 | } | |
d8ada134 | 341 | |
32cd4c24 | 342 | Int_t maxTime = 0; |
56613d93 | 343 | int nsamples = 0; |
32cd4c24 | 344 | while (in.NextBunch()) { |
345 | const UShort_t *sig = in.GetSignals(); | |
346 | startBin = in.GetStartTimeBin(); | |
347 | ||
d8ada134 | 348 | if (((UInt_t) maxTime) < in.GetStartTimeBin()) { |
32cd4c24 | 349 | maxTime = in.GetStartTimeBin(); // timebins come in reverse order |
350 | } | |
351 | ||
352 | if (maxTime < 0 || maxTime >= GetRawFormatTimeBins()) { | |
353 | AliWarning(Form("Invalid time bin %d",maxTime)); | |
354 | maxTime = GetRawFormatTimeBins(); | |
355 | } | |
56613d93 | 356 | nsamples += in.GetBunchLength(); |
32cd4c24 | 357 | for (i = 0; i < in.GetBunchLength(); i++) { |
358 | time = startBin--; | |
359 | gSig->SetPoint(time, time, sig[i]) ; | |
360 | } | |
361 | } // loop over bunches | |
362 | ||
56613d93 | 363 | if (nsamples > 0) { // this check is needed for when we have zero-supp. on, but not sparse readout |
364 | ||
365 | id = fGeom->GetAbsCellIdFromCellIndexes(in.GetModule(), in.GetRow(), in.GetColumn()) ; | |
366 | caloFlag = in.GetCaloFlag(); | |
367 | lowGain = in.IsLowGain(); | |
368 | ||
32cd4c24 | 369 | gSig->Set(maxTime+1); |
370 | FitRaw(gSig, signalF, amp, time) ; | |
ee299369 | 371 | |
32cd4c24 | 372 | if (caloFlag == 0 || caloFlag == 1) { // low gain or high gain |
373 | if (amp > 0 && amp < 2000) { //check both high and low end of | |
e5bbbc4e | 374 | //result, 2000 is somewhat arbitrary - not nice with magic numbers in the code.. |
32cd4c24 | 375 | AliDebug(2,Form("id %d lowGain %d amp %g", id, lowGain, amp)); |
ee299369 | 376 | |
32cd4c24 | 377 | AddDigit(digitsArr, id, lowGain, (Int_t)amp, time); |
378 | } | |
e5bbbc4e | 379 | |
32cd4c24 | 380 | } |
e5bbbc4e | 381 | |
32cd4c24 | 382 | // Reset graph |
383 | for (Int_t index = 0; index < gSig->GetN(); index++) { | |
384 | gSig->SetPoint(index, index, 0) ; | |
385 | } | |
386 | // Reset starting parameters for fit function | |
387 | signalF->SetParameters(10.,0.,fTau,fOrder,5.); //reset all defaults just to be safe | |
48a56166 | 388 | |
56613d93 | 389 | } // nsamples>0 check, some data found for this channel; not only trailer/header |
32cd4c24 | 390 | } // end while over channel |
391 | } //end while over DDL's, of input stream | |
ee299369 | 392 | |
393 | delete signalF ; | |
394 | delete gSig; | |
395 | ||
396 | return ; | |
397 | } | |
398 | ||
399 | //____________________________________________________________________________ | |
82cbdfca | 400 | void AliEMCALRawUtils::AddDigit(TClonesArray *digitsArr, Int_t id, Int_t lowGain, Int_t amp, Float_t time) { |
401 | // | |
402 | // Add a new digit. | |
403 | // This routine checks whether a digit exists already for this tower | |
404 | // and then decides whether to use the high or low gain info | |
405 | // | |
406 | // Called by Raw2Digits | |
407 | ||
408 | AliEMCALDigit *digit = 0, *tmpdigit = 0; | |
409 | ||
410 | TIter nextdigit(digitsArr); | |
411 | while (digit == 0 && (tmpdigit = (AliEMCALDigit*) nextdigit())) { | |
412 | if (tmpdigit->GetId() == id) | |
413 | digit = tmpdigit; | |
414 | } | |
415 | ||
416 | if (!digit) { // no digit existed for this tower; create one | |
417 | if (lowGain) | |
418 | amp = Int_t(fHighLowGainFactor * amp); | |
419 | Int_t idigit = digitsArr->GetEntries(); | |
420 | new((*digitsArr)[idigit]) AliEMCALDigit( -1, -1, id, amp, time, idigit) ; | |
421 | } | |
422 | else { // a digit already exists, check range | |
b4133f05 | 423 | // (use high gain if signal < cut value, otherwise low gain) |
82cbdfca | 424 | if (lowGain) { // new digit is low gain |
b4133f05 | 425 | if (digit->GetAmp() > fgkOverflowCut) { // use if stored digit is out of range |
82cbdfca | 426 | digit->SetAmp(Int_t(fHighLowGainFactor * amp)); |
427 | digit->SetTime(time); | |
428 | } | |
429 | } | |
b4133f05 | 430 | else if (amp < fgkOverflowCut) { // new digit is high gain; use if not out of range |
82cbdfca | 431 | digit->SetAmp(amp); |
432 | digit->SetTime(time); | |
433 | } | |
434 | } | |
435 | } | |
436 | ||
437 | //____________________________________________________________________________ | |
e5bbbc4e | 438 | void AliEMCALRawUtils::FitRaw(TGraph * gSig, TF1* signalF, Float_t & amp, Float_t & time) const |
ee299369 | 439 | { |
440 | // Fits the raw signal time distribution; from AliEMCALGetter | |
441 | ||
ee299369 | 442 | amp = time = 0. ; |
82cbdfca | 443 | Double_t ped = 0; |
444 | Int_t nPed = 0; | |
ee299369 | 445 | |
b4133f05 | 446 | for (Int_t index = 0; index < fNPedSamples; index++) { |
e9dbb64a | 447 | Double_t ttime, signal; |
82cbdfca | 448 | gSig->GetPoint(index, ttime, signal) ; |
449 | if (signal > 0) { | |
450 | ped += signal; | |
451 | nPed++; | |
ee299369 | 452 | } |
453 | } | |
e9dbb64a | 454 | |
82cbdfca | 455 | if (nPed > 0) |
456 | ped /= nPed; | |
e9dbb64a | 457 | else { |
8cb998bd | 458 | AliWarning("Could not determine pedestal"); |
82cbdfca | 459 | ped = 10; // put some small value as first guess |
e9dbb64a | 460 | } |
82cbdfca | 461 | |
e5bbbc4e | 462 | Int_t maxFound = 0; |
463 | Int_t iMax = 0; | |
e9dbb64a | 464 | Float_t max = -1; |
e5bbbc4e | 465 | Float_t maxFit = gSig->GetN(); |
466 | Float_t minAfterSig = 9999; | |
467 | Int_t tminAfterSig = gSig->GetN(); | |
468 | Int_t nPedAfterSig = 0; | |
469 | Int_t plateauWidth = 0; | |
470 | Int_t plateauStart = 9999; | |
471 | Float_t cut = 0.3; | |
e9dbb64a | 472 | |
b4133f05 | 473 | for (Int_t i=fNPedSamples; i < gSig->GetN(); i++) { |
e9dbb64a | 474 | Double_t ttime, signal; |
475 | gSig->GetPoint(i, ttime, signal) ; | |
e5bbbc4e | 476 | if (!maxFound && signal > max) { |
477 | iMax = i; | |
e9dbb64a | 478 | max = signal; |
479 | } | |
b4133f05 | 480 | else if ( max > ped + fNoiseThreshold ) { |
e5bbbc4e | 481 | maxFound = 1; |
482 | minAfterSig = signal; | |
483 | tminAfterSig = i; | |
e9dbb64a | 484 | } |
e5bbbc4e | 485 | if (maxFound) { |
486 | if ( signal < minAfterSig) { | |
487 | minAfterSig = signal; | |
488 | tminAfterSig = i; | |
e9dbb64a | 489 | } |
e5bbbc4e | 490 | if (i > tminAfterSig + 5) { // Two close peaks; end fit at minimum |
491 | maxFit = tminAfterSig; | |
e9dbb64a | 492 | break; |
493 | } | |
e5bbbc4e | 494 | if ( signal < cut*max){ //stop fit at 30% amplitude(avoid the pulse shape falling edge) |
495 | maxFit = i; | |
c61fe3b4 | 496 | break; |
497 | } | |
b4133f05 | 498 | if ( signal < ped + fNoiseThreshold) |
e5bbbc4e | 499 | nPedAfterSig++; |
500 | if (nPedAfterSig >= 5) { // include 5 pedestal bins after peak | |
501 | maxFit = i; | |
e9dbb64a | 502 | break; |
503 | } | |
5a056daa | 504 | } |
fb070798 | 505 | //Add check on plateau |
506 | if (signal >= fgkRawSignalOverflow - fNoiseThreshold) { | |
e5bbbc4e | 507 | if(plateauWidth == 0) plateauStart = i; |
508 | plateauWidth++; | |
fb070798 | 509 | } |
510 | } | |
511 | ||
e5bbbc4e | 512 | if(plateauWidth > 0) { |
513 | for(int j = 0; j < plateauWidth; j++) { | |
fb070798 | 514 | //Note, have to remove the same point N times because after each |
515 | //remove, the positions of all subsequent points have shifted down | |
e5bbbc4e | 516 | gSig->RemovePoint(plateauStart); |
fb070798 | 517 | } |
82cbdfca | 518 | } |
5a056daa | 519 | |
b4133f05 | 520 | if ( max - ped > fNoiseThreshold ) { // else its noise |
e9dbb64a | 521 | AliDebug(2,Form("Fitting max %d ped %d", max, ped)); |
e5bbbc4e | 522 | signalF->SetRange(0,maxFit); |
8cb998bd | 523 | |
524 | if(max-ped > 50) | |
525 | signalF->SetParLimits(2,1,3); | |
526 | ||
527 | signalF->SetParameter(4, ped) ; | |
e5bbbc4e | 528 | signalF->SetParameter(1, iMax); |
8cb998bd | 529 | signalF->SetParameter(0, max); |
530 | ||
531 | gSig->Fit(signalF, "QROW"); // Note option 'W': equal errors on all points | |
532 | amp = signalF->GetParameter(0); | |
533 | time = signalF->GetParameter(1)*GetRawFormatTimeBinWidth() - fgTimeTrigger; | |
ee299369 | 534 | } |
535 | return; | |
536 | } | |
537 | //__________________________________________________________________ | |
538 | Double_t AliEMCALRawUtils::RawResponseFunction(Double_t *x, Double_t *par) | |
539 | { | |
8cb998bd | 540 | // Matches version used in 2007 beam test |
541 | // | |
ee299369 | 542 | // Shape of the electronics raw reponse: |
543 | // It is a semi-gaussian, 2nd order Gamma function of the general form | |
544 | // | |
545 | // t' = (t - t0 + tau) / tau | |
546 | // F = A * t**N * exp( N * ( 1 - t) ) for t >= 0 | |
547 | // F = 0 for t < 0 | |
548 | // | |
549 | // parameters: | |
8cb998bd | 550 | // A: par[0] // Amplitude = peak value |
551 | // t0: par[1] | |
552 | // tau: par[2] | |
553 | // N: par[3] | |
554 | // ped: par[4] | |
ee299369 | 555 | // |
556 | Double_t signal ; | |
8cb998bd | 557 | Double_t tau =par[2]; |
e5bbbc4e | 558 | Double_t n =par[3]; |
8cb998bd | 559 | Double_t ped = par[4]; |
560 | Double_t xx = ( x[0] - par[1] + tau ) / tau ; | |
ee299369 | 561 | |
5a056daa | 562 | if (xx <= 0) |
8cb998bd | 563 | signal = ped ; |
ee299369 | 564 | else { |
e5bbbc4e | 565 | signal = ped + par[0] * TMath::Power(xx , n) * TMath::Exp(n * (1 - xx )) ; |
ee299369 | 566 | } |
567 | return signal ; | |
568 | } | |
569 | ||
570 | //__________________________________________________________________ | |
571 | Bool_t AliEMCALRawUtils::RawSampledResponse( | |
572 | const Double_t dtime, const Double_t damp, Int_t * adcH, Int_t * adcL) const | |
573 | { | |
574 | // for a start time dtime and an amplitude damp given by digit, | |
575 | // calculates the raw sampled response AliEMCAL::RawResponseFunction | |
576 | ||
ee299369 | 577 | Bool_t lowGain = kFALSE ; |
578 | ||
48a56166 | 579 | // A: par[0] // Amplitude = peak value |
580 | // t0: par[1] | |
581 | // tau: par[2] | |
582 | // N: par[3] | |
583 | // ped: par[4] | |
584 | ||
56e13066 | 585 | TF1 signalF("signal", RawResponseFunction, 0, GetRawFormatTimeBins(), 5); |
48a56166 | 586 | signalF.SetParameter(0, damp) ; |
56e13066 | 587 | signalF.SetParameter(1, (dtime + fgTimeTrigger)/fgTimeBinWidth) ; |
b4133f05 | 588 | signalF.SetParameter(2, fTau) ; |
589 | signalF.SetParameter(3, fOrder); | |
fe93d365 | 590 | signalF.SetParameter(4, fgPedestalValue); |
ee299369 | 591 | |
592 | for (Int_t iTime = 0; iTime < GetRawFormatTimeBins(); iTime++) { | |
56e13066 | 593 | Double_t signal = signalF.Eval(iTime) ; |
fe93d365 | 594 | |
595 | //According to Terry Awes, 13-Apr-2008 | |
596 | //add gaussian noise in quadrature to each sample | |
09974781 | 597 | //Double_t noise = gRandom->Gaus(0.,fgFEENoise); |
fe93d365 | 598 | //signal = sqrt(signal*signal + noise*noise); |
599 | ||
e2c2134b | 600 | // March 17,09 for fast fit simulations by Alexei Pavlinov. |
601 | // Get from PHOS analysis. In some sense it is open questions. | |
602 | Double_t noise = gRandom->Gaus(0.,fgFEENoise); | |
603 | signal += noise; | |
604 | ||
ee299369 | 605 | adcH[iTime] = static_cast<Int_t>(signal + 0.5) ; |
b4133f05 | 606 | if ( adcH[iTime] > fgkRawSignalOverflow ){ // larger than 10 bits |
607 | adcH[iTime] = fgkRawSignalOverflow ; | |
ee299369 | 608 | lowGain = kTRUE ; |
609 | } | |
610 | ||
611 | signal /= fHighLowGainFactor; | |
612 | ||
613 | adcL[iTime] = static_cast<Int_t>(signal + 0.5) ; | |
b4133f05 | 614 | if ( adcL[iTime] > fgkRawSignalOverflow) // larger than 10 bits |
615 | adcL[iTime] = fgkRawSignalOverflow ; | |
ee299369 | 616 | } |
617 | return lowGain ; | |
618 | } |