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1 | |
2 | /************************************************************************** |
3 | * Copyright(c) 1998-2000, ALICE Experiment at CERN, All rights reserved. * |
4 | * * |
5 | * Author: The ALICE Off-line Project. * |
6 | * Contributors are mentioned in the code where appropriate. * |
7 | * * |
8 | * Permission to use, copy, modify and distribute this software and its * |
9 | * documentation strictly for non-commercial purposes is hereby granted * |
10 | * without fee, provided that the above copyright notice appears in all * |
11 | * copies and that both the copyright notice and this permission notice * |
12 | * appear in the supporting documentation. The authors make no claims * |
13 | * about the suitability of this software for any purpose. It is * |
14 | * provided "as is" without express or implied warranty. * |
15 | **************************************************************************/ |
16 | |
17 | |
18 | #include <TTree.h> |
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19 | #include <TFile.h> |
20 | #include <TDirectory.h> |
21 | #include <TRandom.h> |
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22 | #include <TArrayI.h> |
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23 | #include <TError.h> |
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24 | #include <TH1F.h> |
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25 | |
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26 | #include "AliLog.h" |
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27 | #include "AliSTARTDigitizer.h" |
28 | #include "AliSTART.h" |
29 | #include "AliSTARThit.h" |
30 | #include "AliSTARTdigit.h" |
31 | #include "AliRunDigitizer.h" |
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32 | #include <AliDetector.h> |
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33 | #include "AliRun.h" |
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34 | #include <AliLoader.h> |
35 | #include <AliRunLoader.h> |
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36 | #include <stdlib.h> |
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37 | #include <Riostream.h> |
38 | #include <Riostream.h> |
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39 | |
40 | ClassImp(AliSTARTDigitizer) |
41 | |
42 | //___________________________________________ |
43 | AliSTARTDigitizer::AliSTARTDigitizer() :AliDigitizer() |
44 | { |
45 | // Default ctor - don't use it |
46 | ; |
47 | } |
48 | |
49 | //___________________________________________ |
50 | AliSTARTDigitizer::AliSTARTDigitizer(AliRunDigitizer* manager) |
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51 | :AliDigitizer(manager), |
52 | fSTART(0), |
53 | fHits(0), |
54 | fdigits(0), |
55 | ftimeTDC(0), |
56 | fADC(0), |
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57 | ftimeTDCAmp(0), |
58 | fADCAmp(0), |
59 | fSumMult(0), |
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60 | fEff(0) |
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61 | { |
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62 | // ctor which should be used |
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63 | |
64 | AliDebug(1,"processed"); |
65 | |
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66 | fSTART = 0; |
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67 | fHits = 0; |
68 | fdigits = 0; |
69 | |
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70 | ftimeTDC = new TArrayI(24); |
71 | fADC = new TArrayI(24); |
72 | ftimeTDCAmp = new TArrayI(24); |
73 | fADCAmp = new TArrayI(24); |
74 | fSumMult = new TArrayI(6); |
75 | |
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76 | |
77 | TFile* file = TFile::Open("$ALICE_ROOT/START/PMTefficiency.root"); |
78 | fEff = (TH1F*) file->Get("hEff")->Clone(); |
79 | fEff->SetDirectory(NULL); |
80 | file->Close(); |
81 | delete file; |
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82 | } |
83 | |
84 | //------------------------------------------------------------------------ |
85 | AliSTARTDigitizer::~AliSTARTDigitizer() |
86 | { |
87 | // Destructor |
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88 | |
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89 | AliDebug(1,"START"); |
90 | |
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91 | delete ftimeTDC; |
92 | delete fADC; |
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93 | delete fEff; |
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94 | delete ftimeTDCAmp; |
95 | delete fADCAmp; |
96 | delete fSumMult; |
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97 | } |
98 | |
99 | //------------------------------------------------------------------------ |
100 | Bool_t AliSTARTDigitizer::Init() |
101 | { |
102 | // Initialization |
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103 | AliDebug(1," Init"); |
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104 | return kTRUE; |
105 | } |
106 | |
107 | |
108 | //--------------------------------------------------------------------- |
109 | |
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110 | void AliSTARTDigitizer::Exec(Option_t* /*option*/) |
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111 | { |
112 | |
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113 | /* |
114 | Produde digits from hits |
115 | digits is TObject and includes |
116 | We are writing array if left & right TDC |
117 | left & right ADC (will need for slow simulation) |
118 | TOF first particle left & right |
119 | mean time and time difference (vertex position) |
120 | |
121 | */ |
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122 | |
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123 | //output loader |
124 | AliRunLoader *outRL = AliRunLoader::GetRunLoader(fManager->GetOutputFolderName()); |
125 | AliLoader * pOutStartLoader = outRL->GetLoader("STARTLoader"); |
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126 | |
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127 | AliDebug(1,"start..."); |
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128 | //input loader |
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129 | // |
130 | // From hits to digits |
131 | // |
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132 | Int_t hit, nhits; |
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133 | Int_t countE[24], sumMult[3]; |
134 | Int_t volume,pmt,tr,qt,qtAmp; |
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135 | Int_t bestRightTDC,bestLeftTDC; |
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136 | Float_t time[24],besttime[24], timeGaus[24] ; |
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137 | Float_t channelWidth=25.; //ps |
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138 | //Q->T-> coefficients !!!! should be asked!!! |
139 | Float_t ph2mV = 150./500.; |
140 | Int_t threshold =50; //photoelectrons |
141 | Int_t mV2channel=200000/(25*25); //5V -> 200ns |
142 | |
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143 | |
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144 | AliSTARThit *startHit; |
145 | TBranch *brHits=0; |
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146 | |
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147 | Int_t nFiles=fManager->GetNinputs(); |
148 | for (Int_t inputFile=0; inputFile<nFiles; inputFile++) { |
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149 | if (inputFile < nFiles-1) { |
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150 | AliWarning(Form("ignoring input stream %d", inputFile)); |
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151 | continue; |
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152 | |
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153 | } |
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154 | |
155 | Float_t besttimeright=99999.; |
156 | Float_t besttimeleft=99999.; |
157 | Int_t timeDiff, meanTime; |
158 | |
159 | for (Int_t i0=0; i0<24; i0++) |
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160 | { |
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161 | time[i0]=99999; besttime[i0]=99999; countE[i0]=0; |
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162 | } |
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163 | for ( Int_t imu=0; imu<3; imu++) sumMult[imu]=0; |
164 | AliRunLoader * inRL = AliRunLoader::GetRunLoader(fManager->GetInputFolderName(inputFile)); |
165 | AliLoader * pInStartLoader = inRL->GetLoader("STARTLoader"); |
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166 | if (!inRL->GetAliRun()) inRL->LoadgAlice(); |
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167 | AliSTART *fSTART = (AliSTART*)inRL ->GetAliRun()->GetDetector("START"); |
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168 | |
169 | //read Hits |
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170 | pInStartLoader->LoadHits("READ");//probably it is necessary to load them before |
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171 | TClonesArray *fHits = fSTART->Hits (); |
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172 | TTree *th = pInStartLoader->TreeH(); |
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173 | brHits = th->GetBranch("START"); |
174 | if (brHits) { |
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175 | fSTART->SetHitsAddressBranch(brHits); |
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176 | }else{ |
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177 | AliError("Branch START hit not found"); |
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178 | exit(111); |
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179 | } |
180 | Int_t ntracks = (Int_t) th->GetEntries(); |
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181 | |
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182 | if (ntracks<=0) return; |
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183 | // Start loop on tracks in the hits containers |
184 | for (Int_t track=0; track<ntracks;track++) { |
185 | brHits->GetEntry(track); |
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186 | nhits = fHits->GetEntriesFast(); |
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187 | for (hit=0;hit<nhits;hit++) |
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188 | { |
189 | startHit = (AliSTARThit*) fHits->UncheckedAt(hit); |
190 | if (!startHit) { |
191 | AliError("The unchecked hit doesn't exist"); |
192 | break; |
193 | } |
194 | pmt=startHit->Pmt(); |
195 | Int_t numpmt=pmt-1; |
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196 | Double_t e=startHit->Etot(); |
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197 | volume = startHit->Volume(); |
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198 | |
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199 | if(e>0 && RegisterPhotoE(e)) { |
200 | countE[numpmt]++; |
201 | besttime[numpmt] = startHit->Time(); |
202 | if(besttime[numpmt]<time[numpmt]) |
203 | { |
204 | time[numpmt]=besttime[numpmt]; |
205 | } |
206 | } |
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207 | } //hits loop |
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208 | } //track loop |
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209 | |
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210 | //spread time right&left by 25ps && besttime |
211 | for (Int_t ipmt=0; ipmt<12; ipmt++){ |
212 | if(countE[ipmt] > threshold) { |
213 | timeGaus[ipmt]=gRandom->Gaus(time[ipmt],25); |
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214 | if(timeGaus[ipmt]<besttimeleft) besttimeleft=timeGaus[ipmt]; //timeleft |
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215 | sumMult[0] += countE[ipmt]; |
216 | sumMult[1] += countE[ipmt]; |
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217 | } |
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218 | } |
219 | for ( Int_t ipmt=12; ipmt<24; ipmt++){ |
220 | if(countE[ipmt] > threshold) { |
221 | timeGaus[ipmt]=gRandom->Gaus(time[ipmt],25); |
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222 | if(timeGaus[ipmt]<besttimeright) besttimeright=timeGaus[ipmt]; //timeright |
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223 | sumMult[0] += countE[ipmt]; |
224 | sumMult[2] += countE[ipmt]; |
225 | } |
226 | } |
227 | //ADC features fill digits |
228 | //folding with experimental time distribution |
229 | Float_t c = 0.0299792; // cm/ps |
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230 | Float_t koef=(350.-69.7)/c; |
231 | Float_t besttimeleftR= besttimeleft; |
232 | besttimeleft=koef+besttimeleft; |
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233 | bestLeftTDC=Int_t (besttimeleftR/channelWidth); |
234 | bestRightTDC=Int_t (besttimeright/channelWidth); |
235 | timeDiff=Int_t ((besttimeright-besttimeleftR)/channelWidth); |
236 | meanTime=Int_t (((besttimeright+besttimeleft)/2.)/channelWidth); |
237 | AliDebug(2,Form(" time in ns %f ", besttimeleft)); |
238 | for (Int_t i=0; i<24; i++) |
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239 | { |
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240 | // fill TDC |
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241 | tr= Int_t (timeGaus[i]/channelWidth); |
242 | if(timeGaus[i]>50000) tr=0; |
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243 | |
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244 | //fill ADC |
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245 | Int_t al= countE[i]; |
246 | // QTC procedure: |
247 | // phe -> mV 0.3; 1MIP ->500phe -> ln (amp (mV)) = 5; |
248 | // max 200ns, HIJING mean 50000phe -> 15000mv -> ln = 15 (s zapasom) |
249 | // channel 25ps |
250 | if (al>threshold) { |
251 | qt=Int_t (TMath::Log(al*ph2mV) * mV2channel); |
252 | qtAmp=Int_t (TMath::Log(al*10*ph2mV) * mV2channel); |
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253 | fADC->AddAt(qt,i); |
254 | ftimeTDC->AddAt(tr,i); |
255 | fADCAmp->AddAt(qtAmp,i); |
256 | ftimeTDCAmp->AddAt(tr,i); //now is the same as non-amplified but will be change |
257 | } |
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258 | } //pmt loop |
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259 | for (Int_t im=0; im<3; im++) |
260 | { |
261 | if (sumMult[im]>threshold){ |
262 | Int_t sum=Int_t (TMath::Log(sumMult[im]*ph2mV) * mV2channel); |
263 | Int_t sumAmp=Int_t (TMath::Log(10*sumMult[im]*ph2mV) * mV2channel); |
264 | fSumMult->AddAt(sum,im); |
265 | fSumMult->AddAt(sumAmp,im+3); |
266 | } |
267 | } |
268 | |
269 | fSTART->AddDigit(bestRightTDC,bestLeftTDC,meanTime,timeDiff,fSumMult, |
270 | ftimeTDC,fADC,ftimeTDCAmp,fADCAmp); |
271 | pOutStartLoader->UnloadHits(); |
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272 | } //input streams loop |
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273 | |
274 | //load digits |
275 | pOutStartLoader->LoadDigits("UPDATE"); |
276 | TTree *treeD = pOutStartLoader->TreeD(); |
277 | if (treeD == 0x0) { |
278 | pOutStartLoader->MakeTree("D"); |
279 | treeD = pOutStartLoader->TreeD(); |
280 | } |
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281 | AliSTART *fSTART = (AliSTART*)outRL ->GetAliRun()->GetDetector("START"); |
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282 | fSTART->MakeBranch("D"); |
283 | treeD->Reset(); |
284 | treeD->Fill(); |
285 | |
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286 | pOutStartLoader->WriteDigits("OVERWRITE"); |
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287 | |
288 | fSTART->ResetDigits(); |
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289 | pOutStartLoader->UnloadDigits(); |
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290 | |
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291 | } |
292 | |
293 | |
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294 | //------------------------------------------------------------------------ |
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295 | Bool_t AliSTARTDigitizer::RegisterPhotoE(Double_t energy) |
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296 | { |
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297 | |
298 | |
299 | // Float_t hc=197.326960*1.e6; //mev*nm |
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300 | Double_t hc=1.973*1.e-6; //gev*nm |
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301 | Float_t lambda=hc/energy; |
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302 | Int_t bin= fEff->GetXaxis()->FindBin(lambda); |
303 | Float_t eff=fEff->GetBinContent(bin); |
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304 | Double_t p = gRandom->Rndm(); |
305 | if (p > eff) |
306 | return kFALSE; |
307 | |
308 | return kTRUE; |
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309 | } |
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310 | //---------------------------------------------------------------------------- |