fixed bug in AliSTARTTrigger
[u/mrichter/AliRoot.git] / ZDC / AliZDCDigitizer.cxx
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8309c1ab 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// //
20// ZDC digitizer class //
21// //
22///////////////////////////////////////////////////////////////////////////////
23
24#include <stdlib.h>
25
26// --- ROOT system
27#include <TTree.h>
28#include <TFile.h>
29#include <TNtuple.h>
30#include <TRandom.h>
31
32// --- AliRoot header files
33#include "AliLog.h"
34#include "AliRun.h"
35#include "AliHeader.h"
36#include "AliGenHijingEventHeader.h"
37#include "AliRunDigitizer.h"
38#include "AliRunLoader.h"
78d18275 39#include "AliCDBManager.h"
48642b09 40#include "AliCDBStorage.h"
41#include "AliCDBEntry.h"
8309c1ab 42#include "AliZDCSDigit.h"
43#include "AliZDCDigit.h"
44#include "AliZDCFragment.h"
45#include "AliZDCDigitizer.h"
48642b09 46#include "AliZDCCalibData.h"
8309c1ab 47
48ClassImp(AliZDCDigitizer)
49
50
51//____________________________________________________________________________
52AliZDCDigitizer::AliZDCDigitizer()
53{
54// Default constructor
55
56}
57
58//____________________________________________________________________________
59AliZDCDigitizer::AliZDCDigitizer(AliRunDigitizer* manager):
60 AliDigitizer(manager)
61{
78d18275 62
48642b09 63 // Constructor
78d18275 64 fStorage = SetStorage("local://$ALICE_ROOT");
65
66 // Get calibration data
7f73eb6b 67 fCalibData = GetCalibData();
78d18275 68
8309c1ab 69}
70
71//____________________________________________________________________________
72AliZDCDigitizer::~AliZDCDigitizer()
73{
74// Destructor
75
76}
77
78
79//____________________________________________________________________________
80Bool_t AliZDCDigitizer::Init()
81{
48642b09 82 // Initialize the digitizer
83 // NB -> PM gain vs. HV & ADC resolutions will move to DCDB ***************
7f73eb6b 84 for(Int_t j = 0; j < 5; j++){
85 fPMGain[0][j] = 50000.;
86 fPMGain[1][j] = 100000.;
87 fPMGain[2][j] = 100000.;
a017f01b 88 fPMGain[3][j] = 50000.;
89 fPMGain[4][j] = 100000.;
90 fPMGain[5][j] = 100000.;
7f73eb6b 91 }
92 // ADC Caen V965
93 fADCRes[0] = 0.0000008; // ADC Resolution high gain: 200 fC/adcCh
94 fADCRes[1] = 0.0000064; // ADC Resolution low gain: 25 fC/adcCh
8309c1ab 95
96 return kTRUE;
97}
98
99//____________________________________________________________________________
100void AliZDCDigitizer::Exec(Option_t* /*option*/)
101{
48642b09 102 // Execute digitization
8309c1ab 103
7f73eb6b 104 Float_t pm[5][5]; // !!! 2nd ZDC set added (needed for trigger purposes!)
105 // *** 1st 3 arrays are digits from REAL (simulated) hits
106 // *** last 2 are copied from simulated digits
107 // --- pm[0][...] = light in ZN right [C, Q1, Q2, Q3, Q4]
108 // --- pm[1][...] = light in ZP right [C, Q1, Q2, Q3, Q4]
48642b09 109 // --- pm[2][...] = light in ZEM [x, 1, 2, x, x]
7f73eb6b 110 // --- pm[3][...] = light in ZN left [C, Q1, Q2, Q3, Q4] ->NEW!
111 // --- pm[4][...] = light in ZP left [C, Q1, Q2, Q3, Q4] ->NEW!
112
113 for (Int_t iSector1=0; iSector1<5; iSector1++)
114 for (Int_t iSector2=0; iSector2<5; iSector2++) {
8309c1ab 115 pm[iSector1][iSector2] = 0;
116 }
8309c1ab 117
118 // impact parameter and number of spectators
119 Float_t impPar = -1;
120 Int_t specN = 0;
121 Int_t specP = 0;
122
123 // loop over input streams
7f73eb6b 124 for (Int_t iInput = 0; iInput<fManager->GetNinputs(); iInput++) {
8309c1ab 125
126 // get run loader and ZDC loader
127 AliRunLoader* runLoader =
128 AliRunLoader::GetRunLoader(fManager->GetInputFolderName(iInput));
129 AliLoader* loader = runLoader->GetLoader("ZDCLoader");
130 if (!loader) continue;
131
132 // load sdigits
133 loader->LoadSDigits();
134 TTree* treeS = loader->TreeS();
135 if (!treeS) continue;
136 AliZDCSDigit sdigit;
137 AliZDCSDigit* psdigit = &sdigit;
138 treeS->SetBranchAddress("ZDC", &psdigit);
139
140 // loop over sdigits
7f73eb6b 141 for (Int_t iSDigit=0; iSDigit<treeS->GetEntries(); iSDigit++) {
8309c1ab 142 treeS->GetEntry(iSDigit);
7f73eb6b 143 //
8309c1ab 144 if (!psdigit) continue;
8309c1ab 145 if ((sdigit.GetSector(1) < 0) || (sdigit.GetSector(1) > 4)) {
146 AliError(Form("\nsector[0] = %d, sector[1] = %d\n",
147 sdigit.GetSector(0), sdigit.GetSector(1)));
148 continue;
149 }
7f73eb6b 150 //
48642b09 151 pm[(sdigit.GetSector(0))-1][sdigit.GetSector(1)] += sdigit.GetLightPM();
7f73eb6b 152 /*printf("\n\t Detector %d, Tower %d -> pm[%d][%d] = %.0f \n",
48642b09 153 sdigit.GetSector(0), sdigit.GetSector(1),sdigit.GetSector(0)-1,
154 sdigit.GetSector(1), pm[sdigit.GetSector(0)-1][sdigit.GetSector(1)]); // Chiara debugging!
7f73eb6b 155 */
8309c1ab 156 }
157
8309c1ab 158 loader->UnloadSDigits();
159
160 // get the impact parameter and the number of spectators in case of hijing
161 if (!runLoader->GetAliRun()) runLoader->LoadgAlice();
162 AliHeader* header = runLoader->GetAliRun()->GetHeader();
163 if (!header) continue;
164 AliGenEventHeader* genHeader = header->GenEventHeader();
165 if (!genHeader) continue;
166 if (!genHeader->InheritsFrom(AliGenHijingEventHeader::Class())) continue;
167 impPar = ((AliGenHijingEventHeader*) genHeader)->ImpactParameter();
85a96223 168 //
169 specN = ((AliGenHijingEventHeader*) genHeader)->ProjSpectatorsn();
170 specP = ((AliGenHijingEventHeader*) genHeader)->ProjSpectatorsp();
78d18275 171 AliDebug(2, Form("\n AliZDCDigitizer -> b = %f fm, Nspecn = %d, Nspecp = %d\n",
8309c1ab 172 impPar, specN, specP));
7f73eb6b 173 printf("\n\t AliZDCDigitizer -> b = %f fm, Nspecn = %d, Nspecp = %d\n", impPar, specN, specP);
8309c1ab 174 }
175
176 // add spectators
177 if (impPar >= 0) {
178 Int_t freeSpecN, freeSpecP;
179 Fragmentation(impPar, specN, specP, freeSpecN, freeSpecP);
78d18275 180 printf("\n\t AliZDCDigitizer ---- Adding signal for %d free spectator n\n",freeSpecN);
8309c1ab 181 SpectatorSignal(1, freeSpecN, pm);
78d18275 182 printf("\t AliZDCDigitizer ---- Adding signal for %d free spectator p\n\n",freeSpecP);
8309c1ab 183 SpectatorSignal(2, freeSpecP, pm);
184 }
185
186 // get the output run loader and loader
187 AliRunLoader* runLoader =
188 AliRunLoader::GetRunLoader(fManager->GetOutputFolderName());
189 AliLoader* loader = runLoader->GetLoader("ZDCLoader");
190 if (!loader) {
191 AliError("no ZDC loader found");
192 return;
193 }
194
195 // create the output tree
196 const char* mode = "update";
197 if (runLoader->GetEventNumber() == 0) mode = "recreate";
198 loader->LoadDigits(mode);
199 loader->MakeTree("D");
200 TTree* treeD = loader->TreeD();
201 AliZDCDigit digit;
202 AliZDCDigit* pdigit = &digit;
203 const Int_t kBufferSize = 4000;
204 treeD->Branch("ZDC", "AliZDCDigit", &pdigit, kBufferSize);
205
206 // Create digits
7f73eb6b 207 Int_t sector[2], sectorL[2];
208 Int_t digi[2], digiL[2];
209 for (sector[0]=1; sector[0]<=3; sector[0]++)
210 for (sector[1]=0; sector[1]<5; sector[1]++) {
211 if ((sector[0]==3) && ((sector[1]<1) || (sector[1]>2))) continue;
212 for (Int_t res=0; res<2; res++){
48642b09 213 digi[res] = Phe2ADCch(sector[0], sector[1], pm[sector[0]-1][sector[1]], res)
214 + Pedestal(sector[0], sector[1], res);
7f73eb6b 215 }
216 //printf("\t DIGIT added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
217 // sector[0], sector[1], digi[0], digi[1]); // Chiara debugging!
8309c1ab 218 new(pdigit) AliZDCDigit(sector, digi);
219 treeD->Fill();
7f73eb6b 220 //
221 // --- Adding digits for 2nd ZDC set (left side w.r.t. IP) ---
222 // --- they are copied from right ZDC digits
223 if(sector[0]==1 || sector[0]==2){
224 sectorL[0] = sector[0]+3;
225 sectorL[1] = sector[1];
226 for (Int_t res=0; res<2; res++){
227 digiL[res] = Phe2ADCch(sectorL[0], sectorL[1], pm[sector[0]-1][sector[1]], res)
228 + Pedestal(sectorL[0], sectorL[1], res);
229 }
230 //printf("\t DIGIT added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
231 // sectorL[0], sectorL[1], digiL[0], digiL[1]); // Chiara debugging!
232 new(pdigit) AliZDCDigit(sectorL, digiL);
233 }
234 //
235 treeD->Fill();
8309c1ab 236 }
237
238 // write the output tree
239 loader->WriteDigits("OVERWRITE");
240 loader->UnloadDigits();
241}
242
243
244//_____________________________________________________________________________
245void AliZDCDigitizer::Fragmentation(Float_t impPar, Int_t specN, Int_t specP,
246 Int_t &freeSpecN, Int_t &freeSpecP) const
247{
248// simulate fragmentation of spectators
249
250 Int_t zz[100], nn[100];
251 AliZDCFragment frag(impPar);
252 for (Int_t j=0; j<=99; j++){
253 zz[j] =0;
254 nn[j] =0;
255 }
256
257 // Fragments generation
258 Int_t nAlpha;
259 frag.GenerateIMF(zz, nAlpha);
260
261 // Attach neutrons
262 Int_t ztot=0;
263 Int_t ntot=0;
264 frag.AttachNeutrons(zz, nn, ztot, ntot);
265 freeSpecN = specN-ntot-2*nAlpha;
266 freeSpecP = specP-ztot-2*nAlpha;
267 if(freeSpecN<0) freeSpecN=0;
268 if(freeSpecP<0) freeSpecP=0;
269 AliDebug(2, Form("FreeSpn = %d, FreeSpp = %d", freeSpecN, freeSpecP));
270}
271
272//_____________________________________________________________________________
273void AliZDCDigitizer::SpectatorSignal(Int_t SpecType, Int_t numEvents,
274 Float_t pm[3][5]) const
275{
276// add signal of the spectators
277
278 TFile* file = NULL;
279 if (SpecType == 1) { // --- Signal for spectator neutrons
280 file = TFile::Open("$ALICE/$ALICE_LEVEL/ZDC/ZNsignalntu.root");
281 } else if (SpecType == 2) { // --- Signal for spectator protons
282 file = TFile::Open("$ALICE/$ALICE_LEVEL/ZDC/ZPsignalntu.root");
283 }
284 if (!file || !file->IsOpen()) {
285 AliError("Opening of file failed");
286 return;
287 }
288
289 TNtuple* zdcSignal = (TNtuple*) file->Get("ZDCSignal");
290 Int_t nentries = (Int_t) zdcSignal->GetEntries();
291
292 Float_t *entry, hitsSpec[7];
293 Int_t pl, i, j, k, iev=0, rnd[125], volume[2];
48642b09 294 for(pl=0;pl<125;pl++) rnd[pl] = 0;
8309c1ab 295 if (numEvents > 125) {
296 AliWarning(Form("numEvents (%d) is larger than 125", numEvents));
297 numEvents = 125;
298 }
299 for(pl=0;pl<numEvents;pl++){
300 rnd[pl] = (Int_t) (9999*gRandom->Rndm());
85a96223 301 if(rnd[pl] >= 9999) rnd[pl] = 9998;
8309c1ab 302 //printf(" rnd[%d] = %d\n",pl,rnd[pl]);
303 }
304 // Sorting vector in ascending order with C function QSORT
305 qsort((void*)rnd,numEvents,sizeof(Int_t),comp);
306 do{
307 for(i=0; i<nentries; i++){
308 zdcSignal->GetEvent(i);
309 entry = zdcSignal->GetArgs();
310 if(entry[0] == rnd[iev]){
311 for(k=0; k<2; k++) volume[k] = (Int_t) entry[k+1];
312 for(j=0; j<7; j++) hitsSpec[j] = entry[j+3];
48642b09 313 //
8309c1ab 314 Float_t lightQ = hitsSpec[4];
315 Float_t lightC = hitsSpec[5];
78d18275 316 AliDebug(3, Form("SpectatorSignal -> vol = (%d, %d), lightQ = %.0f, lightC = %.0f",
8309c1ab 317 volume[0], volume[1], lightQ, lightC));
48642b09 318 //printf("\n Volume = (%d, %d), lightQ = %.0f, lightC = %.0f",
319 // volume[0], volume[1], lightQ, lightC);
8309c1ab 320 if (volume[0] < 3) { // ZN or ZP
321 pm[volume[0]-1][0] += lightC;
322 pm[volume[0]-1][volume[1]] += lightQ;
48642b09 323 //printf("\n pm[%d][0] = %.0f, pm[%d][%d] = %.0f\n",(volume[0]-1),pm[volume[0]-1][0],
324 // (volume[0]-1),volume[1],pm[volume[0]-1][volume[1]]);
325 }
326 else {
327 if (volume[1] == 1) pm[2][1] += lightC; // ZEM 1
328 else pm[2][2] += lightQ; // ZEM 2
329 //printf("\n pm[2][1] = %.0f, pm[2][2] = %.0f\n",pm[2][1],pm[2][2]);
330 }
8309c1ab 331 }
332 else if(entry[0] > rnd[iev]){
333 iev++;
334 continue;
335 }
336 }
337 }while(iev<numEvents);
338
339 file->Close();
340 delete file;
341}
342
343
344//_____________________________________________________________________________
345Int_t AliZDCDigitizer::Phe2ADCch(Int_t Det, Int_t Quad, Float_t Light,
346 Int_t Res) const
347{
48642b09 348 // Evaluation of the ADC channel corresponding to the light yield Light
349 Int_t ADCch = (Int_t) (Light * fPMGain[Det-1][Quad] * fADCRes[Res]);
78d18275 350 //printf("\t Phe2ADCch -> det %d quad %d - phe %.0f ADC %d\n", Det,Quad,Light,ADCch);
7f73eb6b 351
48642b09 352 return ADCch;
353}
8309c1ab 354
48642b09 355//_____________________________________________________________________________
356Int_t AliZDCDigitizer::Pedestal(Int_t Det, Int_t Quad, Int_t Res) const
357{
48642b09 358
dbc8d7fc 359 Float_t meanPed;
78d18275 360 if(Det != 3) meanPed = fCalibData->GetMeanPed(10*(Det-1)+Quad+5*Res);
361 else meanPed = fCalibData->GetMeanPed(10*(Det-1)+Quad+1*Res);
dbc8d7fc 362
78d18275 363 //printf("\t Pedestal -> det = %d, quad = %d, res = %d - Ped[%d] = %d\n",
364 // Det, Quad, Res,10*(Det-1)+Quad+5*Res,(Int_t) meanPed); // Chiara debugging!
48642b09 365
7f73eb6b 366 // To create calibration object
dbc8d7fc 367 /*Float_t meanPed;
7f73eb6b 368 meanPed = gRandom->Gaus((40.+10.*gRandom->Rndm()),5.);
dbc8d7fc 369 */
370
48642b09 371 return (Int_t) meanPed;
8309c1ab 372}
373
374//_____________________________________________________________________________
78d18275 375AliCDBStorage* AliZDCDigitizer::SetStorage(const char *uri)
8309c1ab 376{
8309c1ab 377
78d18275 378 Bool_t deleteManager = kFALSE;
48642b09 379
78d18275 380 AliCDBManager *manager = AliCDBManager::Instance();
381 AliCDBStorage *defstorage = manager->GetDefaultStorage();
48642b09 382
78d18275 383 if(!defstorage || !(defstorage->Contains("ZDC"))){
384 AliWarning("No default storage set or default storage doesn't contain ZDC!");
385 manager->SetDefaultStorage(uri);
386 deleteManager = kTRUE;
387 }
388
389 AliCDBStorage *storage = manager->GetDefaultStorage();
390
391 if(deleteManager){
392 AliCDBManager::Instance()->UnsetDefaultStorage();
393 defstorage = 0; // the storage is killed by AliCDBManager::Instance()->Destroy()
394 }
395
396 return storage;
397}
48642b09 398
78d18275 399//_____________________________________________________________________________
7f73eb6b 400AliZDCCalibData* AliZDCDigitizer::GetCalibData() const
78d18275 401{
48642b09 402
7f73eb6b 403 AliCDBEntry *entry = fStorage->Get("ZDC/Calib/Data",0);
78d18275 404 AliZDCCalibData *calibdata = (AliZDCCalibData*) entry->GetObject();
405
7f73eb6b 406 if (!calibdata) AliWarning("No ZDC calibration data from calibration database!");
8309c1ab 407
78d18275 408 return calibdata;
8309c1ab 409}