The modification of the loader requires to change calls loader->LoadDigits() to loade...
[u/mrichter/AliRoot.git] / EMCAL / AliEMCAL.cxx
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2012850d 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/* $Id$ */
17
18//_________________________________________________________________________
19// Base Class for EMCAL description:
ffa6d63b 20// This class contains material definitions
21// for the EMCAL - It does not place the detector in Alice
2012850d 22//*-- Author: Yves Schutz (SUBATECH)
b13bbe81 23//
24//*-- Additional Contributions: Sahal Yacoob (LBNL/UCT)
25//
2012850d 26//////////////////////////////////////////////////////////////////////////////
27
2012850d 28// --- ROOT system ---
b13bbe81 29class TFile;
88cb7938 30#include <TFolder.h>
88cb7938 31#include <TTree.h>
32#include <TVirtualMC.h>
046ae904 33#include <TH1F.h>
34#include <TF1.h>
35#include <TRandom.h>
2d5d9e60 36#include <TGraph.h>
2012850d 37
05a92d59 38// --- Standard library ---
2012850d 39
05a92d59 40// --- AliRoot header files ---
2012850d 41#include "AliMagF.h"
88cb7938 42#include "AliEMCAL.h"
85a5290f 43#include "AliRun.h"
5dee926e 44#include "AliEMCALLoader.h"
85a5290f 45#include "AliEMCALSDigitizer.h"
46#include "AliEMCALDigitizer.h"
5dee926e 47#include "AliEMCALDigit.h"
f51151a0 48#include "AliAltroBuffer.h"
2d5d9e60 49#include "AliRawReader.h"
50#include "AliEMCALRawStream.h"
2012850d 51
52ClassImp(AliEMCAL)
56088960 53Double_t AliEMCAL::fgCapa = 1.; // 1pF
54Int_t AliEMCAL::fgOrder = 2 ;
55Double_t AliEMCAL::fgTimeMax = 2.56E-5 ; // each sample is over 100 ns fTimeMax/fTimeBins
56Double_t AliEMCAL::fgTimePeak = 4.1E-6 ; // 4 micro seconds
57Double_t AliEMCAL::fgTimeTrigger = 100E-9 ; // 100ns, just for a reference
2d5d9e60 58// some digitization constants
59Int_t AliEMCAL::fgDDLOffset = 0x800;
60Int_t AliEMCAL::fgThreshold = 1;
61// 24*48=1152 towers per SM; divided up on 3 DDLs,
62// each DDL with 12FEC *32towers or 12*32*2 channels (high&low gain)
63Int_t AliEMCAL::fgChannelsPerDDL = 768; // 2*(1152/3 or 12*32)
56088960 64
2012850d 65//____________________________________________________________________________
66AliEMCAL::AliEMCAL():AliDetector()
67{
05a92d59 68 // Default ctor
046ae904 69 fName = "EMCAL" ;
2012850d 70}
05a92d59 71
2012850d 72//____________________________________________________________________________
05a92d59 73AliEMCAL::AliEMCAL(const char* name, const char* title): AliDetector(name,title)
74{
75 // ctor : title is used to identify the layout
046ae904 76
56088960 77 fHighCharge = 8.2 ; // adjusted for a high gain range of 5.12 GeV (10 bits)
78 fHighGain = 6.64 ;
79 fHighLowGainFactor = 16. ; // adjusted for a low gain range of 82 GeV (10 bits)
80 fLowGainOffset = 1 ; // offset added to the module id to distinguish high and low gain data
2012850d 81}
05a92d59 82
2012850d 83//____________________________________________________________________________
05a92d59 84AliEMCAL::~AliEMCAL()
85{
86
2012850d 87}
88
89//____________________________________________________________________________
5dee926e 90void AliEMCAL::Copy(AliEMCAL & emcal) const
8367ce9a 91{
92 TObject::Copy(emcal) ;
56088960 93 emcal.fHighCharge = fHighCharge ;
94 emcal.fHighGain = fHighGain ;
95 emcal.fHighLowGainFactor = fHighLowGainFactor ;
96 emcal.fLowGainOffset = fLowGainOffset;
8367ce9a 97}
98
99//____________________________________________________________________________
100AliDigitizer* AliEMCAL::CreateDigitizer(AliRunDigitizer* manager) const
101{
102 return new AliEMCALDigitizer(manager);
103}
104
105//____________________________________________________________________________
05a92d59 106void AliEMCAL::CreateMaterials()
107{
2012850d 108 // Definitions of materials to build EMCAL and associated tracking media.
109 // media number in idtmed are 1599 to 1698.
110
996cf306 111 // --- Air ---
112 Float_t aAir[4]={12.0107,14.0067,15.9994,39.948};
113 Float_t zAir[4]={6.,7.,8.,18.};
114 Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
115 Float_t dAir = 1.20479E-3;
116 AliMixture(0, "Air$", aAir, zAir, dAir, 4, wAir) ;
b13bbe81 117
2012850d 118 // --- Lead ---
119 AliMaterial(1, "Pb$", 207.2, 82, 11.35, 0.56, 0., 0, 0) ;
120
b13bbe81 121
122 // --- The polysterene scintillator (CH) ---
123 Float_t aP[2] = {12.011, 1.00794} ;
124 Float_t zP[2] = {6.0, 1.0} ;
125 Float_t wP[2] = {1.0, 1.0} ;
126 Float_t dP = 1.032 ;
127
128 AliMixture(2, "Polystyrene$", aP, zP, dP, -2, wP) ;
129
130 // --- Aluminium ---
131 AliMaterial(3, "Al$", 26.98, 13., 2.7, 8.9, 999., 0, 0) ;
132 // --- Absorption length is ignored ^
133
1963b290 134 // 25-aug-04 by PAI - see PMD/AliPMDv0.cxx for STEEL definition
135 Float_t asteel[4] = { 55.847,51.9961,58.6934,28.0855 };
136 Float_t zsteel[4] = { 26.,24.,28.,14. };
137 Float_t wsteel[4] = { .715,.18,.1,.005 };
138 AliMixture(4, "STAINLESS STEEL$", asteel, zsteel, 7.88, 4, wsteel);
139
2012850d 140 // DEFINITION OF THE TRACKING MEDIA
141
142 // for EMCAL: idtmed[1599->1698] equivalent to fIdtmed[0->100]
143 Int_t * idtmed = fIdtmed->GetArray() - 1599 ;
144 Int_t isxfld = gAlice->Field()->Integ() ;
145 Float_t sxmgmx = gAlice->Field()->Max() ;
146
996cf306 147 // Air -> idtmed[1599]
905263da 148 AliMedium(0, "Air$", 0, 0,
996cf306 149 isxfld, sxmgmx, 10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
2012850d 150
a63e0d5e 151 // The Lead -> idtmed[1600]
2012850d 152
905263da 153 AliMedium(1, "Lead$", 1, 0,
2012850d 154 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
155
b13bbe81 156 // The scintillator of the CPV made of Polystyrene scintillator -> idtmed[1601]
905263da 157 AliMedium(2, "Scintillator$", 2, 1,
61e0abb5 158 isxfld, sxmgmx, 10.0, 0.001, 0.1, 0.001, 0.001, 0, 0) ;
b13bbe81 159
a63e0d5e 160 // Various Aluminium parts made of Al -> idtmed[1602]
905263da 161 AliMedium(3, "Al$", 3, 0,
b13bbe81 162 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.001, 0.001, 0, 0) ;
163
1963b290 164 // 25-aug-04 by PAI : see PMD/AliPMDv0.cxx for STEEL definition -> idtmed[1603]
165 AliMedium(4, "S steel$", 4, 0,
166 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.001, 0.001, 0, 0) ;
2012850d 167
b13bbe81 168// --- Set decent energy thresholds for gamma and electron tracking
2012850d 169
170 // Tracking threshold for photons and electrons in Lead
905263da 171 Float_t cutgam=10.e-5; // 100 kev;
172 Float_t cutele=10.e-5; // 100 kev;
173 TString ntmp(GetTitle());
174 ntmp.ToUpper();
175 if(ntmp.Contains("10KEV")) {
176 cutele = cutgam = 1.e-5;
177 } else if(ntmp.Contains("50KEV")) {
178 cutele = cutgam = 5.e-5;
179 } else if(ntmp.Contains("100KEV")) {
180 cutele = cutgam = 1.e-4;
181 } else if(ntmp.Contains("200KEV")) {
182 cutele = cutgam = 2.e-4;
183 } else if(ntmp.Contains("500KEV")) {
184 cutele = cutgam = 5.e-4;
185 }
2012850d 186
905263da 187 gMC->Gstpar(idtmed[1600],"CUTGAM", cutgam);
188 gMC->Gstpar(idtmed[1600],"CUTELE", cutele); // 1MEV -> 0.1MEV; 15-aug-05
189 gMC->Gstpar(idtmed[1600],"BCUTE", cutgam); // BCUTE and BCUTM start from GUTGUM
190 gMC->Gstpar(idtmed[1600],"BCUTM", cutgam); // BCUTE and BCUTM start from GUTGUM
2012850d 191 // --- Generate explicitly delta rays in Lead ---
192 gMC->Gstpar(idtmed[1600], "LOSS",3.) ;
193 gMC->Gstpar(idtmed[1600], "DRAY",1.) ;
905263da 194 gMC->Gstpar(idtmed[1600], "DCUTE", cutele) ;
195 gMC->Gstpar(idtmed[1600], "DCUTM", cutele) ;
05a92d59 196
a63e0d5e 197// --- in aluminium parts ---
905263da 198 gMC->Gstpar(idtmed[1602],"CUTGAM", cutgam) ;
199 gMC->Gstpar(idtmed[1602],"CUTELE", cutele) ;
200 gMC->Gstpar(idtmed[1602],"BCUTE", cutgam); // BCUTE and BCUTM start from GUTGUM
201 gMC->Gstpar(idtmed[1602],"BCUTM", cutgam); // BCUTE and BCUTM start from GUTGUM
b13bbe81 202 gMC->Gstpar(idtmed[1602], "LOSS",3.) ;
203 gMC->Gstpar(idtmed[1602], "DRAY",1.) ;
905263da 204 gMC->Gstpar(idtmed[1602], "DCUTE", cutele) ;
205 gMC->Gstpar(idtmed[1602], "DCUTM", cutele) ;
b13bbe81 206
ffa6d63b 207// --- and finally thresholds for photons and electrons in the scintillator ---
905263da 208 gMC->Gstpar(idtmed[1601],"CUTGAM", cutgam) ;
209 gMC->Gstpar(idtmed[1601],"CUTELE", cutele) ;// 1MEV -> 0.1MEV; 15-aug-05
210 gMC->Gstpar(idtmed[1601],"BCUTE", cutgam); // BCUTE and BCUTM start from GUTGUM
211 gMC->Gstpar(idtmed[1601],"BCUTM", cutgam); // BCUTE and BCUTM start from GUTGUM
212 gMC->Gstpar(idtmed[1601], "LOSS",3.) ; // generate delta rays
213 gMC->Gstpar(idtmed[1601], "DRAY",1.) ;
214 gMC->Gstpar(idtmed[1601], "DCUTE", cutele) ;
215 gMC->Gstpar(idtmed[1601], "DCUTM", cutele) ;
216
217 // S steel -
218 gMC->Gstpar(idtmed[1603],"CUTGAM", cutgam);
219 gMC->Gstpar(idtmed[1603],"CUTELE", cutele);
220 gMC->Gstpar(idtmed[1603],"BCUTE", cutgam); // BCUTE and BCUTM start from GUTGUM
221 gMC->Gstpar(idtmed[1603],"BCUTM", cutgam); // BCUTE and BCUTM start from GUTGUM
222 // --- Generate explicitly delta rays
1963b290 223 gMC->Gstpar(idtmed[1603], "LOSS",3.);
224 gMC->Gstpar(idtmed[1603], "DRAY",1.);
905263da 225 gMC->Gstpar(idtmed[1603], "DCUTE", cutele) ;
226 gMC->Gstpar(idtmed[1603], "DCUTM", cutele) ;
1963b290 227
ab37d09c 228 //set constants for Birk's Law implentation
229 fBirkC0 = 1;
230 fBirkC1 = 0.013/dP;
231 fBirkC2 = 9.6e-6/(dP * dP);
232
2012850d 233}
f6019cda 234
8367ce9a 235//____________________________________________________________________________
f51151a0 236void AliEMCAL::Digits2Raw()
237{
56088960 238 // convert digits of the current event to raw data
239 AliEMCALLoader * loader = dynamic_cast<AliEMCALLoader*>(fLoader) ;
f51151a0 240
241 // get the digits
00d03c2f 242 loader->LoadDigits("EMCAL");
56088960 243 TClonesArray* digits = loader->Digits() ;
f51151a0 244
245 if (!digits) {
246 Error("Digits2Raw", "no digits found !");
247 return;
248 }
249
56088960 250 // get the digitizer
251 loader->LoadDigitizer();
252 AliEMCALDigitizer * digitizer = dynamic_cast<AliEMCALDigitizer *>(loader->Digitizer()) ;
253
f51151a0 254
f51151a0 255 AliAltroBuffer* buffer = NULL;
256 Int_t prevDDL = -1;
046ae904 257 Int_t adcValuesLow[fkTimeBins];
258 Int_t adcValuesHigh[fkTimeBins];
56088960 259
f51151a0 260 // loop over digits (assume ordered digits)
261 for (Int_t iDigit = 0; iDigit < digits->GetEntries(); iDigit++) {
56088960 262 AliEMCALDigit* digit = dynamic_cast<AliEMCALDigit *>(digits->At(iDigit)) ;
2d5d9e60 263 if (digit->GetAmp() < fgThreshold)
f51151a0 264 continue;
2d5d9e60 265 Int_t iDDL = digit->GetId() / fgChannelsPerDDL ;
266 // for each DDL id is numbered from 1 to fgChannelsperDDL -1
267 Int_t idDDL = digit->GetId() - iDDL * ( fgChannelsPerDDL - 1 ) ;
f51151a0 268 // new DDL
269 if (iDDL != prevDDL) {
270 // write real header and close previous file
271 if (buffer) {
272 buffer->Flush();
273 buffer->WriteDataHeader(kFALSE, kFALSE);
274 delete buffer;
275 }
276
277 // open new file and write dummy header
278 TString fileName("EMCAL_") ;
2d5d9e60 279 fileName += (iDDL + fgDDLOffset) ;
f51151a0 280 fileName += ".ddl" ;
281 buffer = new AliAltroBuffer(fileName.Data(), 1);
282 buffer->WriteDataHeader(kTRUE, kFALSE); //Dummy;
283
284 prevDDL = iDDL;
285 }
286
287 // out of time range signal (?)
56088960 288 if (digit->GetTimeR() > GetRawFormatTimeMax() ) {
f51151a0 289 buffer->FillBuffer(digit->GetAmp());
56088960 290 buffer->FillBuffer(GetRawFormatTimeBins() ); // time bin
f51151a0 291 buffer->FillBuffer(3); // bunch length
292 buffer->WriteTrailer(3, idDDL, 0, 0); // trailer
56088960 293
294 // calculate the time response function
f51151a0 295 } else {
56088960 296 Double_t energy = 0 ;
297 energy = digit->GetAmp() * digitizer->GetECAchannel() + digitizer->GetECApedestal() ;
298
299 Bool_t lowgain = RawSampledResponse(digit->GetTimeR(), energy, adcValuesHigh, adcValuesLow) ;
300
301 if (lowgain)
302 buffer->WriteChannel(iDDL, 0, fLowGainOffset,
2d5d9e60 303 GetRawFormatTimeBins(), adcValuesLow, fgThreshold);
56088960 304 else
305 buffer->WriteChannel(iDDL, 0, 0,
2d5d9e60 306 GetRawFormatTimeBins(), adcValuesHigh, fgThreshold);
56088960 307
f51151a0 308 }
309 }
56088960 310
f51151a0 311 // write real header and close last file
312 if (buffer) {
313 buffer->Flush();
314 buffer->WriteDataHeader(kFALSE, kFALSE);
315 delete buffer;
316 }
56088960 317
318 loader->UnloadDigits();
f51151a0 319}
320
321//____________________________________________________________________________
2d5d9e60 322void AliEMCAL::Raw2Digits(AliRawReader* reader)
323{
4800667c 324 // convert raw data of the current event to digits
ddca522a 325 GetGeometry();
2d5d9e60 326 AliEMCALLoader * loader = dynamic_cast<AliEMCALLoader*>(fLoader) ;
327
328 // get the digits
329 loader->CleanDigits(); // start from scratch
00d03c2f 330 loader->LoadDigits("EMCAL");
2d5d9e60 331 TClonesArray* digits = loader->Digits() ;
332 digits->Clear(); // yes, this is perhaps somewhat paranoid.. [clearing an extra time]
333
334 if (!digits) {
335 Error("Raw2Digits", "no digits found !");
336 return;
337 }
338 if (!reader) {
339 Error("Raw2Digits", "no raw reader found !");
340 return;
341 }
342
343 // and get the digitizer too
344 loader->LoadDigitizer();
345 AliEMCALDigitizer * digitizer = dynamic_cast<AliEMCALDigitizer *>(loader->Digitizer()) ;
346
347 // Use AliAltroRawStream to read the ALTRO format. No need to
348 // reinvent the wheel :-)
349 AliEMCALRawStream in(reader);
350 // Select EMCAL DDL's; lowest 8 bits of DDL offser is used for something else..
351 reader->Select(fgDDLOffset >> 8);
352
353 // reading is from previously existing AliEMCALGetter.cxx
354 // ReadRaw method
355 Bool_t first = kTRUE ;
356
357 TF1 * signalF = new TF1("signal", RawResponseFunction, 0, GetRawFormatTimeMax(), 4);
358 signalF->SetParNames("Charge", "Gain", "Amplitude", "TimeZero");
359
360 Int_t id = -1;
361 Bool_t lowGainFlag = kFALSE ;
362
363 Int_t idigit = 0 ;
364 Int_t amp = 0 ;
365 Double_t time = 0. ;
366 Double_t energy = 0. ;
367
368 TGraph * gLowGain = new TGraph(GetRawFormatTimeBins()) ;
369 TGraph * gHighGain= new TGraph(GetRawFormatTimeBins()) ;
370
371 while ( in.Next() ) { // EMCAL entries loop
372 if ( in.IsNewId() ) {
373 if (!first) {
374 FitRaw(lowGainFlag, gLowGain, gHighGain, signalF, energy, time) ;
375
376 if (time == 0. && energy == 0.) {
377 amp = 0 ;
378 }
379 else {
380 amp = static_cast<Int_t>( (energy - digitizer->GetECApedestal()) / digitizer->GetECAchannel() + 0.5 ) ;
381 }
382
383 if (amp > 0) {
384 new((*digits)[idigit]) AliEMCALDigit( -1, -1, id, amp, time) ;
385 idigit++ ;
386 }
387 Int_t index ;
388 for (index = 0; index < GetRawFormatTimeBins(); index++) {
389 gLowGain->SetPoint(index, index * GetRawFormatTimeMax() / GetRawFormatTimeBins(), 0) ;
390 gHighGain->SetPoint(index, index * GetRawFormatTimeMax() / GetRawFormatTimeBins(), 0) ;
391 }
392 } // not first
393 first = kFALSE ;
394 id = in.GetId() ;
395 if (in.GetModule() == GetRawFormatLowGainOffset() ) {
396 lowGainFlag = kTRUE ;
397 }
398 else {
399 lowGainFlag = kFALSE ;
400 }
401 } // new Id?
402 if (lowGainFlag) {
403 gLowGain->SetPoint(in.GetTime(),
404 in.GetTime()* GetRawFormatTimeMax() / GetRawFormatTimeBins(),
405 in.GetSignal()) ;
406 }
407 else {
408 gHighGain->SetPoint(in.GetTime(),
409 in.GetTime() * GetRawFormatTimeMax() / GetRawFormatTimeBins(),
410 in.GetSignal() ) ;
411 }
412 } // EMCAL entries loop
413 digits->Sort() ;
414
415 delete signalF ;
416 delete gLowGain;
417 delete gHighGain ;
418
419 return ;
420}
421
422//____________________________________________________________________________
423void AliEMCAL::FitRaw(Bool_t lowGainFlag, TGraph * gLowGain, TGraph * gHighGain, TF1* signalF, Double_t & energy, Double_t & time)
424{
425 // Fits the raw signal time distribution; from AliEMCALGetter
426
427 const Int_t kNoiseThreshold = 0 ;
428 Double_t timezero1 = 0., timezero2 = 0., timemax = 0. ;
429 Double_t signal = 0., signalmax = 0. ;
430 energy = time = 0. ;
431
432 if (lowGainFlag) {
433 timezero1 = timezero2 = signalmax = timemax = 0. ;
434 signalF->FixParameter(0, GetRawFormatLowCharge()) ;
435 signalF->FixParameter(1, GetRawFormatLowGain()) ;
436 Int_t index ;
437 for (index = 0; index < GetRawFormatTimeBins(); index++) {
438 gLowGain->GetPoint(index, time, signal) ;
439 if (signal > kNoiseThreshold && timezero1 == 0.)
440 timezero1 = time ;
441 if (signal <= kNoiseThreshold && timezero1 > 0. && timezero2 == 0.)
442 timezero2 = time ;
443 if (signal > signalmax) {
444 signalmax = signal ;
445 timemax = time ;
446 }
447 }
448 signalmax /= RawResponseFunctionMax(GetRawFormatLowCharge(),
449 GetRawFormatLowGain()) ;
450 if ( timezero1 + GetRawFormatTimePeak() < GetRawFormatTimeMax() * 0.4 ) { // else its noise
451 signalF->SetParameter(2, signalmax) ;
452 signalF->SetParameter(3, timezero1) ;
453 gLowGain->Fit(signalF, "QRON", "", 0., timezero2); //, "QRON") ;
454 energy = signalF->GetParameter(2) ;
455 time = signalF->GetMaximumX() - GetRawFormatTimePeak() - GetRawFormatTimeTrigger() ;
456 }
457 } else {
458 timezero1 = timezero2 = signalmax = timemax = 0. ;
459 signalF->FixParameter(0, GetRawFormatHighCharge()) ;
460 signalF->FixParameter(1, GetRawFormatHighGain()) ;
461 Int_t index ;
462 for (index = 0; index < GetRawFormatTimeBins(); index++) {
463 gHighGain->GetPoint(index, time, signal) ;
464 if (signal > kNoiseThreshold && timezero1 == 0.)
465 timezero1 = time ;
466 if (signal <= kNoiseThreshold && timezero1 > 0. && timezero2 == 0.)
467 timezero2 = time ;
468 if (signal > signalmax) {
469 signalmax = signal ;
470 timemax = time ;
471 }
472 }
473 signalmax /= RawResponseFunctionMax(GetRawFormatHighCharge(),
474 GetRawFormatHighGain()) ;;
475 if ( timezero1 + GetRawFormatTimePeak() < GetRawFormatTimeMax() * 0.4 ) { // else its noise
476 signalF->SetParameter(2, signalmax) ;
477 signalF->SetParameter(3, timezero1) ;
478 gHighGain->Fit(signalF, "QRON", "", 0., timezero2) ;
479 energy = signalF->GetParameter(2) ;
480 time = signalF->GetMaximumX() - GetRawFormatTimePeak() - GetRawFormatTimeTrigger() ;
481 }
482 }
483
484 return;
485}
486
487//____________________________________________________________________________
8367ce9a 488void AliEMCAL::Hits2SDigits()
489{
490// create summable digits
491
ddca522a 492 GetGeometry();
4d33c797 493 AliEMCALSDigitizer emcalDigitizer(fLoader->GetRunLoader()->GetFileName().Data()) ;
494 emcalDigitizer.SetEventRange(0, -1) ; // do all the events
495 emcalDigitizer.ExecuteTask() ;
da480a28 496}
497
498//____________________________________________________________________________
5dee926e 499
8367ce9a 500AliLoader* AliEMCAL::MakeLoader(const char* topfoldername)
501{
502//different behaviour than standard (singleton getter)
503// --> to be discussed and made eventually coherent
504 fLoader = new AliEMCALLoader(GetName(),topfoldername);
505 return fLoader;
506}
507
046ae904 508//__________________________________________________________________
509Double_t AliEMCAL::RawResponseFunction(Double_t *x, Double_t *par)
510{
511 // Shape of the electronics raw reponse:
56088960 512 // It is a semi-gaussian, 2nd order Gamma function of the general form
513 // v(t) = n**n * Q * A**n / C *(t/tp)**n * exp(-n * t/tp) with
514 // tp : peaking time par[0]
515 // n : order of the function
516 // C : integrating capacitor in the preamplifier
517 // A : open loop gain of the preamplifier
518 // Q : the total APD charge to be measured Q = C * energy
046ae904 519
56088960 520 Double_t signal ;
521 Double_t xx = x[0] - ( fgTimeTrigger + par[3] ) ;
046ae904 522
56088960 523 if (xx < 0 || xx > fgTimeMax)
524 signal = 0. ;
525 else {
526 Double_t fac = par[0] * TMath::Power(fgOrder, fgOrder) * TMath::Power(par[1], fgOrder) / fgCapa ;
527 signal = fac * par[2] * TMath::Power(xx / fgTimePeak, fgOrder) * TMath::Exp(-fgOrder * (xx / fgTimePeak)) ;
528 }
529 return signal ;
046ae904 530}
531
532//__________________________________________________________________
56088960 533Double_t AliEMCAL::RawResponseFunctionMax(Double_t charge, Double_t gain)
534{
535 return ( charge * TMath::Power(fgOrder, fgOrder) * TMath::Power(gain, fgOrder)
536 / ( fgCapa * TMath::Exp(fgOrder) ) );
537
538}
539//__________________________________________________________________
540Bool_t AliEMCAL::RawSampledResponse(
541const Double_t dtime, const Double_t damp, Int_t * adcH, Int_t * adcL) const
046ae904 542{
543 // for a start time dtime and an amplitude damp given by digit,
56088960 544 // calculates the raw sampled response AliEMCAL::RawResponseFunction
046ae904 545
546 const Int_t kRawSignalOverflow = 0x3FF ;
56088960 547 Bool_t lowGain = kFALSE ;
548
549 TF1 signalF("signal", RawResponseFunction, 0, GetRawFormatTimeMax(), 4);
550
551 for (Int_t iTime = 0; iTime < GetRawFormatTimeBins(); iTime++) {
552 signalF.SetParameter(0, GetRawFormatHighCharge() ) ;
553 signalF.SetParameter(1, GetRawFormatHighGain() ) ;
554 signalF.SetParameter(2, damp) ;
555 signalF.SetParameter(3, dtime) ;
556 Double_t time = iTime * GetRawFormatTimeMax() / GetRawFormatTimeBins() ;
557 Double_t signal = signalF.Eval(time) ;
558 if ( static_cast<Int_t>(signal+0.5) > kRawSignalOverflow ){ // larger than 10 bits
559 signal = kRawSignalOverflow ;
560 lowGain = kTRUE ;
561 }
562 adcH[iTime] = static_cast<Int_t>(signal + 0.5) ;
563
564 signalF.SetParameter(0, GetRawFormatLowCharge() ) ;
565 signalF.SetParameter(1, GetRawFormatLowGain() ) ;
566 signal = signalF.Eval(time) ;
567 if ( static_cast<Int_t>(signal+0.5) > kRawSignalOverflow) // larger than 10 bits
568 signal = kRawSignalOverflow ;
569 adcL[iTime] = static_cast<Int_t>(0.5 + signal ) ;
570
046ae904 571 }
56088960 572 return lowGain ;
046ae904 573}