]>
Commit | Line | Data |
---|---|---|
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 | 29 | class 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> | |
2012850d | 36 | |
05a92d59 | 37 | // --- Standard library --- |
2012850d | 38 | |
05a92d59 | 39 | // --- AliRoot header files --- |
2012850d | 40 | #include "AliMagF.h" |
88cb7938 | 41 | #include "AliEMCAL.h" |
f51151a0 | 42 | #include "AliEMCALGetter.h" |
85a5290f | 43 | #include "AliRun.h" |
44 | #include "AliEMCALSDigitizer.h" | |
45 | #include "AliEMCALDigitizer.h" | |
f51151a0 | 46 | #include "AliAltroBuffer.h" |
2012850d | 47 | |
48 | ClassImp(AliEMCAL) | |
2012850d | 49 | //____________________________________________________________________________ |
50 | AliEMCAL::AliEMCAL():AliDetector() | |
51 | { | |
05a92d59 | 52 | // Default ctor |
046ae904 | 53 | fName = "EMCAL" ; |
2012850d | 54 | } |
05a92d59 | 55 | |
2012850d | 56 | //____________________________________________________________________________ |
05a92d59 | 57 | AliEMCAL::AliEMCAL(const char* name, const char* title): AliDetector(name,title) |
58 | { | |
59 | // ctor : title is used to identify the layout | |
046ae904 | 60 | |
61 | fTimeMax = 1.28E-5 ; | |
62 | fTimePeak = 2.0E-6 ; | |
63 | fTimeRes = 1.5E-6 ; | |
64 | fHighGainFactor = 40; | |
65 | fHighGainOffset = 0x200 ; | |
2012850d | 66 | } |
05a92d59 | 67 | |
2012850d | 68 | //____________________________________________________________________________ |
05a92d59 | 69 | AliEMCAL::~AliEMCAL() |
70 | { | |
71 | ||
2012850d | 72 | } |
73 | ||
8367ce9a | 74 | //____________________________________________________________________________ |
75 | void AliEMCAL::Copy(AliEMCAL & emcal) | |
76 | { | |
77 | TObject::Copy(emcal) ; | |
78 | } | |
79 | ||
80 | //____________________________________________________________________________ | |
81 | AliDigitizer* AliEMCAL::CreateDigitizer(AliRunDigitizer* manager) const | |
82 | { | |
83 | return new AliEMCALDigitizer(manager); | |
84 | } | |
85 | ||
2012850d | 86 | //____________________________________________________________________________ |
05a92d59 | 87 | void AliEMCAL::CreateMaterials() |
88 | { | |
2012850d | 89 | // Definitions of materials to build EMCAL and associated tracking media. |
90 | // media number in idtmed are 1599 to 1698. | |
91 | ||
996cf306 | 92 | // --- Air --- |
93 | Float_t aAir[4]={12.0107,14.0067,15.9994,39.948}; | |
94 | Float_t zAir[4]={6.,7.,8.,18.}; | |
95 | Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827}; | |
96 | Float_t dAir = 1.20479E-3; | |
97 | AliMixture(0, "Air$", aAir, zAir, dAir, 4, wAir) ; | |
b13bbe81 | 98 | |
2012850d | 99 | // --- Lead --- |
100 | AliMaterial(1, "Pb$", 207.2, 82, 11.35, 0.56, 0., 0, 0) ; | |
101 | ||
b13bbe81 | 102 | |
103 | // --- The polysterene scintillator (CH) --- | |
104 | Float_t aP[2] = {12.011, 1.00794} ; | |
105 | Float_t zP[2] = {6.0, 1.0} ; | |
106 | Float_t wP[2] = {1.0, 1.0} ; | |
107 | Float_t dP = 1.032 ; | |
108 | ||
109 | AliMixture(2, "Polystyrene$", aP, zP, dP, -2, wP) ; | |
110 | ||
111 | // --- Aluminium --- | |
112 | AliMaterial(3, "Al$", 26.98, 13., 2.7, 8.9, 999., 0, 0) ; | |
113 | // --- Absorption length is ignored ^ | |
114 | ||
2012850d | 115 | // DEFINITION OF THE TRACKING MEDIA |
116 | ||
117 | // for EMCAL: idtmed[1599->1698] equivalent to fIdtmed[0->100] | |
118 | Int_t * idtmed = fIdtmed->GetArray() - 1599 ; | |
119 | Int_t isxfld = gAlice->Field()->Integ() ; | |
120 | Float_t sxmgmx = gAlice->Field()->Max() ; | |
121 | ||
996cf306 | 122 | // Air -> idtmed[1599] |
123 | AliMedium(0, "Air $", 0, 0, | |
124 | isxfld, sxmgmx, 10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ; | |
2012850d | 125 | |
a63e0d5e | 126 | // The Lead -> idtmed[1600] |
2012850d | 127 | |
128 | AliMedium(1, "Lead $", 1, 0, | |
129 | isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ; | |
130 | ||
b13bbe81 | 131 | // The scintillator of the CPV made of Polystyrene scintillator -> idtmed[1601] |
132 | AliMedium(2, "CPV scint. $", 2, 1, | |
61e0abb5 | 133 | isxfld, sxmgmx, 10.0, 0.001, 0.1, 0.001, 0.001, 0, 0) ; |
b13bbe81 | 134 | |
a63e0d5e | 135 | // Various Aluminium parts made of Al -> idtmed[1602] |
b13bbe81 | 136 | AliMedium(3, "Al parts $", 3, 0, |
137 | isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.001, 0.001, 0, 0) ; | |
138 | ||
2012850d | 139 | |
b13bbe81 | 140 | // --- Set decent energy thresholds for gamma and electron tracking |
2012850d | 141 | |
142 | // Tracking threshold for photons and electrons in Lead | |
ffa6d63b | 143 | gMC->Gstpar(idtmed[1600],"CUTGAM",0.00008) ; |
144 | gMC->Gstpar(idtmed[1600],"CUTELE",0.001) ; | |
145 | gMC->Gstpar(idtmed[1600],"BCUTE",0.0001) ; | |
2012850d | 146 | |
147 | // --- Generate explicitly delta rays in Lead --- | |
148 | gMC->Gstpar(idtmed[1600], "LOSS",3.) ; | |
149 | gMC->Gstpar(idtmed[1600], "DRAY",1.) ; | |
05a92d59 | 150 | gMC->Gstpar(idtmed[1600], "DCUTE",0.00001) ; |
151 | gMC->Gstpar(idtmed[1600], "DCUTM",0.00001) ; | |
152 | ||
a63e0d5e | 153 | // --- in aluminium parts --- |
b13bbe81 | 154 | gMC->Gstpar(idtmed[1602], "LOSS",3.) ; |
155 | gMC->Gstpar(idtmed[1602], "DRAY",1.) ; | |
05a92d59 | 156 | gMC->Gstpar(idtmed[1602], "DCUTE",0.00001) ; |
157 | gMC->Gstpar(idtmed[1602], "DCUTM",0.00001) ; | |
b13bbe81 | 158 | |
ffa6d63b | 159 | // --- and finally thresholds for photons and electrons in the scintillator --- |
61e0abb5 | 160 | gMC->Gstpar(idtmed[1601],"CUTGAM",0.00008) ; |
161 | gMC->Gstpar(idtmed[1601],"CUTELE",0.001) ; | |
162 | gMC->Gstpar(idtmed[1601],"BCUTE",0.0001) ; | |
163 | ||
ab37d09c | 164 | //set constants for Birk's Law implentation |
165 | fBirkC0 = 1; | |
166 | fBirkC1 = 0.013/dP; | |
167 | fBirkC2 = 9.6e-6/(dP * dP); | |
168 | ||
169 | ||
2012850d | 170 | } |
f6019cda | 171 | |
f51151a0 | 172 | //____________________________________________________________________________ |
173 | void AliEMCAL::Digits2Raw() | |
174 | { | |
175 | // convert digits of the current event to raw data | |
176 | ||
177 | // get the digits | |
178 | AliEMCALGetter * gime = AliEMCALGetter::Instance(AliRunLoader::GetGAliceName()) ; | |
179 | if (!gime) { | |
180 | Error("Digits2Raw", "EMCAL Getter not instantiated") ; | |
181 | return ; | |
182 | } | |
183 | gime->Event(gime->EventNumber(), "D") ; | |
184 | TClonesArray* digits = gime->Digits() ; | |
185 | ||
186 | if (!digits) { | |
187 | Error("Digits2Raw", "no digits found !"); | |
188 | return; | |
189 | } | |
190 | ||
191 | // get the geometry | |
192 | AliEMCALGeometry* geom = gime->EMCALGeometry(); | |
193 | if (!geom) { | |
194 | Error("Digits2Raw", "no geometry found !"); | |
195 | return; | |
196 | } | |
197 | ||
198 | // some digitization constants | |
199 | const Int_t kDDLOffset = 0x800; | |
f51151a0 | 200 | const Int_t kThreshold = 3; |
f51151a0 | 201 | const Int_t kChannelsperDDL = 897 ; |
202 | ||
203 | AliAltroBuffer* buffer = NULL; | |
204 | Int_t prevDDL = -1; | |
046ae904 | 205 | Int_t adcValuesLow[fkTimeBins]; |
206 | Int_t adcValuesHigh[fkTimeBins]; | |
f51151a0 | 207 | |
208 | // loop over digits (assume ordered digits) | |
209 | for (Int_t iDigit = 0; iDigit < digits->GetEntries(); iDigit++) { | |
210 | AliEMCALDigit* digit = gime->Digit(iDigit); | |
211 | if (digit->GetAmp() < kThreshold) | |
212 | continue; | |
213 | Int_t iDDL = digit->GetId() / kChannelsperDDL ; | |
214 | // for each DDL id is numbered from 1 to kChannelsperDDL -1 | |
215 | Int_t idDDL = digit->GetId() - iDDL * ( kChannelsperDDL - 1 ) ; | |
216 | // new DDL | |
217 | if (iDDL != prevDDL) { | |
218 | // write real header and close previous file | |
219 | if (buffer) { | |
220 | buffer->Flush(); | |
221 | buffer->WriteDataHeader(kFALSE, kFALSE); | |
222 | delete buffer; | |
223 | } | |
224 | ||
225 | // open new file and write dummy header | |
226 | TString fileName("EMCAL_") ; | |
227 | fileName += (iDDL + kDDLOffset) ; | |
228 | fileName += ".ddl" ; | |
229 | buffer = new AliAltroBuffer(fileName.Data(), 1); | |
230 | buffer->WriteDataHeader(kTRUE, kFALSE); //Dummy; | |
231 | ||
232 | prevDDL = iDDL; | |
233 | } | |
234 | ||
235 | // out of time range signal (?) | |
046ae904 | 236 | if (digit->GetTimeR() > fTimeMax) { |
f51151a0 | 237 | buffer->FillBuffer(digit->GetAmp()); |
046ae904 | 238 | buffer->FillBuffer(fkTimeBins); // time bin |
f51151a0 | 239 | buffer->FillBuffer(3); // bunch length |
240 | buffer->WriteTrailer(3, idDDL, 0, 0); // trailer | |
241 | ||
242 | // simulate linear rise and gaussian decay of signal | |
243 | } else { | |
244 | Bool_t highGain = kFALSE; | |
245 | ||
f51151a0 | 246 | // write low and eventually high gain channel |
046ae904 | 247 | buffer->WriteChannel(iDDL, 0, 0, |
248 | fkTimeBins, adcValuesLow, kThreshold); | |
f51151a0 | 249 | if (highGain) { |
046ae904 | 250 | buffer->WriteChannel(iDDL, 0, fHighGainOffset, |
251 | fkTimeBins, adcValuesHigh, 1); | |
f51151a0 | 252 | } |
253 | } | |
254 | } | |
f51151a0 | 255 | // write real header and close last file |
256 | if (buffer) { | |
257 | buffer->Flush(); | |
258 | buffer->WriteDataHeader(kFALSE, kFALSE); | |
259 | delete buffer; | |
260 | } | |
f51151a0 | 261 | gime->EmcalLoader()->UnloadDigits(); |
262 | } | |
263 | ||
8367ce9a | 264 | //____________________________________________________________________________ |
265 | void AliEMCAL::Hits2SDigits() | |
266 | { | |
267 | // create summable digits | |
268 | ||
269 | AliEMCALSDigitizer* emcalDigitizer = | |
da480a28 | 270 | new AliEMCALSDigitizer(fLoader->GetRunLoader()->GetFileName().Data()) ; |
271 | emcalDigitizer->SetEventRange(0, -1) ; // do all the events | |
272 | emcalDigitizer->ExecuteTask() ; | |
273 | } | |
274 | ||
8367ce9a | 275 | //____________________________________________________________________________ |
276 | AliLoader* AliEMCAL::MakeLoader(const char* topfoldername) | |
277 | { | |
278 | //different behaviour than standard (singleton getter) | |
279 | // --> to be discussed and made eventually coherent | |
280 | fLoader = new AliEMCALLoader(GetName(),topfoldername); | |
281 | return fLoader; | |
282 | } | |
283 | ||
046ae904 | 284 | //__________________________________________________________________ |
285 | Double_t AliEMCAL::RawResponseFunction(Double_t *x, Double_t *par) | |
286 | { | |
287 | // Shape of the electronics raw reponse: | |
288 | // 1. the signal rises linearly from par[4] to par[1] to reach the maximu par[3] | |
289 | // 2. the signal decays with a gaussian shape for par[4]+par[1] with a sigma of par[2] | |
290 | ||
291 | Float_t xx = x[0] ; | |
292 | ||
293 | Double_t signal = 0. ; | |
294 | ||
295 | if (xx < par[4] + par[1]) // signal is rising | |
296 | signal = (gRandom->Rndm() + par[3]) * (xx - par[4]) / (par[1] - par[4]) ; | |
297 | else // signal is decaying | |
298 | signal = (gRandom->Rndm() + par[3]) * TMath::Gaus(xx, par[4] + par[1], par[2]) ; | |
299 | ||
300 | return signal < 0. ? 0. : signal ; | |
301 | } | |
302 | ||
303 | //__________________________________________________________________ | |
304 | Bool_t AliEMCAL::RawSampledResponse(const Float_t dtime, const Int_t damp, Int_t * adcH, Int_t * adcL) const | |
305 | { | |
306 | // for a start time dtime and an amplitude damp given by digit, | |
307 | // calculates the raw sampled response | |
308 | ||
309 | const Int_t kRawSignalOverflow = 0x3FF ; | |
310 | Bool_t highGain = kFALSE ; | |
311 | ||
312 | TF1 f1("signal", RawResponseFunction, 0, fkTimeBins, 5); | |
313 | ||
314 | f1.SetParNames("Time Max", "Peaking time", "Decay width", "Amp max", "Start time") ; | |
315 | f1.SetParameter(0, fTimeMax) ; | |
316 | f1.SetParameter(1, fTimePeak) ; | |
317 | f1.SetParameter(2, fTimeRes) ; | |
318 | f1.SetParameter(3, damp) ; | |
319 | f1.SetParameter(4, dtime) ; | |
320 | ||
321 | for (Int_t iTime = 0; iTime < fkTimeBins; iTime++) { | |
322 | Double_t time = iTime * fTimeMax/fkTimeBins; | |
323 | Double_t signal = f1.Eval(time) ; | |
324 | adcL[iTime] = static_cast<Int_t>(signal + 0.5) ; | |
325 | if ( adcL[iTime] > kRawSignalOverflow) // larger than 10 bits | |
326 | adcL[iTime] = kRawSignalOverflow ; | |
327 | adcH[iTime] = static_cast<Int_t>(0.5 + (signal / fHighGainFactor)) ; | |
328 | if (adcH[iTime] > 0) | |
329 | highGain = kTRUE; | |
330 | } | |
331 | return highGain ; | |
332 | } | |
333 | ||
2012850d | 334 | //____________________________________________________________________________ |
335 | void AliEMCAL::SetTreeAddress() | |
336 | { | |
d64c959b | 337 | // Linking Hits in Tree to Hits array |
2012850d | 338 | TBranch *branch; |
339 | char branchname[20]; | |
340 | sprintf(branchname,"%s",GetName()); | |
341 | ||
342 | // Branch address for hit tree | |
88cb7938 | 343 | TTree *treeH = TreeH(); |
344 | if (treeH) { | |
2012850d | 345 | branch = treeH->GetBranch(branchname); |
88cb7938 | 346 | if (branch) |
347 | { | |
d64c959b | 348 | if (fHits == 0x0) |
349 | fHits= new TClonesArray("AliEMCALHit",1000); | |
88cb7938 | 350 | branch->SetAddress(&fHits); |
351 | } | |
352 | else | |
353 | { | |
354 | Warning("SetTreeAddress","<%s> Failed",GetName()); | |
355 | } | |
2012850d | 356 | } |
2012850d | 357 | } |
2012850d | 358 | |
85a5290f | 359 | |
85a5290f | 360 | |
85a5290f | 361 | |
8367ce9a | 362 |