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[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 "AliCDBEntry.h"
8309c1ab 41#include "AliZDCSDigit.h"
42#include "AliZDCDigit.h"
43#include "AliZDCFragment.h"
44#include "AliZDCDigitizer.h"
8a2624cc 45
46class AliCDBStorage;
47class AliZDCCalibData;
8309c1ab 48
49ClassImp(AliZDCDigitizer)
50
51
52//____________________________________________________________________________
53AliZDCDigitizer::AliZDCDigitizer()
54{
55// Default constructor
56
57}
58
59//____________________________________________________________________________
60AliZDCDigitizer::AliZDCDigitizer(AliRunDigitizer* manager):
61 AliDigitizer(manager)
62{
abf60186 63 fIsCalibration=0; //By default the simulation doesn't create calib. data
78d18275 64 // Get calibration data
7f73eb6b 65 fCalibData = GetCalibData();
d27e20dd 66 if(fIsCalibration!=0) printf("\n\t AliZDCDigitizer -> Creating calibration data (pedestals)\n");
78d18275 67
8309c1ab 68}
69
70//____________________________________________________________________________
71AliZDCDigitizer::~AliZDCDigitizer()
72{
73// Destructor
74
75}
76
77
78//____________________________________________________________________________
cc2abffd 79AliZDCDigitizer::AliZDCDigitizer(const AliZDCDigitizer &digitizer):
80 AliDigitizer()
81{
82 // Copy constructor
83
84 for(Int_t i=0; i<6; i++){
85 for(Int_t j=0; j<5; j++){
86 fPMGain[i][j] = digitizer.fPMGain[i][j];
87 }
88 }
89 for(Int_t i=0; i<2; i++) fADCRes[i] = digitizer.fADCRes[i];
90 fIsCalibration = digitizer.fIsCalibration;
91 fCalibData = digitizer.fCalibData;
92
93}
94
95//____________________________________________________________________________
8309c1ab 96Bool_t AliZDCDigitizer::Init()
97{
48642b09 98 // Initialize the digitizer
99 // NB -> PM gain vs. HV & ADC resolutions will move to DCDB ***************
7f73eb6b 100 for(Int_t j = 0; j < 5; j++){
101 fPMGain[0][j] = 50000.;
102 fPMGain[1][j] = 100000.;
103 fPMGain[2][j] = 100000.;
a017f01b 104 fPMGain[3][j] = 50000.;
105 fPMGain[4][j] = 100000.;
106 fPMGain[5][j] = 100000.;
7f73eb6b 107 }
108 // ADC Caen V965
109 fADCRes[0] = 0.0000008; // ADC Resolution high gain: 200 fC/adcCh
110 fADCRes[1] = 0.0000064; // ADC Resolution low gain: 25 fC/adcCh
8309c1ab 111
112 return kTRUE;
113}
114
115//____________________________________________________________________________
116void AliZDCDigitizer::Exec(Option_t* /*option*/)
117{
48642b09 118 // Execute digitization
8309c1ab 119
d79f8d50 120 // ------------------------------------------------------------
121 // !!! 2nd ZDC set added (needed for trigger purposes!)
7f73eb6b 122 // *** 1st 3 arrays are digits from REAL (simulated) hits
123 // *** last 2 are copied from simulated digits
124 // --- pm[0][...] = light in ZN right [C, Q1, Q2, Q3, Q4]
125 // --- pm[1][...] = light in ZP right [C, Q1, Q2, Q3, Q4]
48642b09 126 // --- pm[2][...] = light in ZEM [x, 1, 2, x, x]
7f73eb6b 127 // --- pm[3][...] = light in ZN left [C, Q1, Q2, Q3, Q4] ->NEW!
128 // --- pm[4][...] = light in ZP left [C, Q1, Q2, Q3, Q4] ->NEW!
d79f8d50 129 // ------------------------------------------------------------
130 Float_t pm[5][5];
8574b308 131 for(Int_t iSector1=0; iSector1<5; iSector1++)
132 for(Int_t iSector2=0; iSector2<5; iSector2++){
8309c1ab 133 pm[iSector1][iSector2] = 0;
134 }
d79f8d50 135
136 // ------------------------------------------------------------
137 // ### Out of time ADC added (22 channels)
138 // --- same codification as for signal PTMs (see above)
139 // ------------------------------------------------------------
140 Float_t pmoot[5][5];
8574b308 141 for(Int_t iSector1=0; iSector1<5; iSector1++)
142 for(Int_t iSector2=0; iSector2<5; iSector2++){
d79f8d50 143 pmoot[iSector1][iSector2] = 0;
144 }
8309c1ab 145
146 // impact parameter and number of spectators
147 Float_t impPar = -1;
148 Int_t specN = 0;
149 Int_t specP = 0;
150
151 // loop over input streams
8574b308 152 for(Int_t iInput = 0; iInput<fManager->GetNinputs(); iInput++){
8309c1ab 153
154 // get run loader and ZDC loader
155 AliRunLoader* runLoader =
156 AliRunLoader::GetRunLoader(fManager->GetInputFolderName(iInput));
157 AliLoader* loader = runLoader->GetLoader("ZDCLoader");
8574b308 158 if(!loader) continue;
8309c1ab 159
160 // load sdigits
161 loader->LoadSDigits();
162 TTree* treeS = loader->TreeS();
8574b308 163 if(!treeS) continue;
8309c1ab 164 AliZDCSDigit sdigit;
165 AliZDCSDigit* psdigit = &sdigit;
166 treeS->SetBranchAddress("ZDC", &psdigit);
167
168 // loop over sdigits
8574b308 169 for(Int_t iSDigit=0; iSDigit<treeS->GetEntries(); iSDigit++){
8309c1ab 170 treeS->GetEntry(iSDigit);
7f73eb6b 171 //
8574b308 172 if(!psdigit) continue;
173 if((sdigit.GetSector(1) < 0) || (sdigit.GetSector(1) > 4)){
8309c1ab 174 AliError(Form("\nsector[0] = %d, sector[1] = %d\n",
175 sdigit.GetSector(0), sdigit.GetSector(1)));
176 continue;
177 }
7f73eb6b 178 //
48642b09 179 pm[(sdigit.GetSector(0))-1][sdigit.GetSector(1)] += sdigit.GetLightPM();
7f73eb6b 180 /*printf("\n\t Detector %d, Tower %d -> pm[%d][%d] = %.0f \n",
48642b09 181 sdigit.GetSector(0), sdigit.GetSector(1),sdigit.GetSector(0)-1,
182 sdigit.GetSector(1), pm[sdigit.GetSector(0)-1][sdigit.GetSector(1)]); // Chiara debugging!
abf60186 183 */
8309c1ab 184 }
185
8309c1ab 186 loader->UnloadSDigits();
187
188 // get the impact parameter and the number of spectators in case of hijing
8574b308 189 if(!runLoader->GetAliRun()) runLoader->LoadgAlice();
8309c1ab 190 AliHeader* header = runLoader->GetAliRun()->GetHeader();
8574b308 191 if(!header) continue;
8309c1ab 192 AliGenEventHeader* genHeader = header->GenEventHeader();
8574b308 193 if(!genHeader) continue;
194 if(!genHeader->InheritsFrom(AliGenHijingEventHeader::Class())) continue;
8309c1ab 195 impPar = ((AliGenHijingEventHeader*) genHeader)->ImpactParameter();
85a96223 196 //
197 specN = ((AliGenHijingEventHeader*) genHeader)->ProjSpectatorsn();
198 specP = ((AliGenHijingEventHeader*) genHeader)->ProjSpectatorsp();
78d18275 199 AliDebug(2, Form("\n AliZDCDigitizer -> b = %f fm, Nspecn = %d, Nspecp = %d\n",
8309c1ab 200 impPar, specN, specP));
d27e20dd 201 printf("\n\t AliZDCDigitizer -> b = %f fm, # generated spectator n = %d,"
202 " # generated spectator p = %d\n", impPar, specN, specP);
8309c1ab 203 }
204
205 // add spectators
8574b308 206 if(impPar >= 0) {
8309c1ab 207 Int_t freeSpecN, freeSpecP;
208 Fragmentation(impPar, specN, specP, freeSpecN, freeSpecP);
d27e20dd 209 printf("\n\t AliZDCDigitizer -> Adding signal for %d free spectator n\n",freeSpecN);
8309c1ab 210 SpectatorSignal(1, freeSpecN, pm);
d27e20dd 211 printf("\t AliZDCDigitizer -> Adding signal for %d free spectator p\n\n",freeSpecP);
8309c1ab 212 SpectatorSignal(2, freeSpecP, pm);
213 }
214
8a2624cc 215
8309c1ab 216 // get the output run loader and loader
217 AliRunLoader* runLoader =
218 AliRunLoader::GetRunLoader(fManager->GetOutputFolderName());
219 AliLoader* loader = runLoader->GetLoader("ZDCLoader");
8574b308 220 if(!loader) {
8309c1ab 221 AliError("no ZDC loader found");
222 return;
223 }
224
225 // create the output tree
226 const char* mode = "update";
8574b308 227 if(runLoader->GetEventNumber() == 0) mode = "recreate";
8309c1ab 228 loader->LoadDigits(mode);
229 loader->MakeTree("D");
230 TTree* treeD = loader->TreeD();
231 AliZDCDigit digit;
232 AliZDCDigit* pdigit = &digit;
233 const Int_t kBufferSize = 4000;
234 treeD->Branch("ZDC", "AliZDCDigit", &pdigit, kBufferSize);
235
236 // Create digits
7f73eb6b 237 Int_t sector[2], sectorL[2];
d79f8d50 238 Int_t digi[2], digiL[2], digioot[2];
abf60186 239 for(sector[0]=1; sector[0]<=3; sector[0]++){
240 for(sector[1]=0; sector[1]<5; sector[1]++){
241 if((sector[0]==3) && ((sector[1]<1) || (sector[1]>2))) continue;
8574b308 242 for(Int_t res=0; res<2; res++){
abf60186 243 digi[res] = Phe2ADCch(sector[0], sector[1], pm[sector[0]-1][sector[1]], res)
48642b09 244 + Pedestal(sector[0], sector[1], res);
7f73eb6b 245 }
abf60186 246 /*printf("\t DIGIT added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
247 sector[0], sector[1], digi[0], digi[1]); // Chiara debugging!
d79f8d50 248 */
abf60186 249 //
250 new(pdigit) AliZDCDigit(sector, digi);
8309c1ab 251 treeD->Fill();
7f73eb6b 252 //
253 // --- Adding digits for 2nd ZDC set (left side w.r.t. IP) ---
254 // --- they are copied from right ZDC digits
255 if(sector[0]==1 || sector[0]==2){
256 sectorL[0] = sector[0]+3;
257 sectorL[1] = sector[1];
8574b308 258 for(Int_t res=0; res<2; res++){
7f73eb6b 259 digiL[res] = Phe2ADCch(sectorL[0], sectorL[1], pm[sector[0]-1][sector[1]], res)
260 + Pedestal(sectorL[0], sectorL[1], res);
261 }
abf60186 262 /*printf("\t DIGIT added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
263 sectorL[0], sectorL[1], digiL[0], digiL[1]); // Chiara debugging!
264 */
265 //
266 new(pdigit) AliZDCDigit(sectorL, digiL);
267 treeD->Fill();
7f73eb6b 268 }
269 //
abf60186 270 //printf("\t AliZDCDigitizer -> TreeD has %d entries\n",(Int_t) treeD->GetEntries());
8309c1ab 271 }
abf60186 272 }
d79f8d50 273 //
274 // --- Adding digits for out-of-time channels after signal digits
275 for(sector[0]=1; sector[0]<=3; sector[0]++){
276 for(sector[1]=0; sector[1]<5; sector[1]++){
277 if((sector[0]==3) && ((sector[1]<1) || (sector[1]>2))) continue;
8574b308 278 for(Int_t res=0; res<2; res++){
d79f8d50 279 digioot[res] = Pedestal(sector[0], sector[1], res); // out-of-time ADCs
280 }
281 /*printf("\t DIGIToot added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
282 sector[0], sector[1], digioot[0], digioot[1]); // Chiara debugging!
283 */
284 //
285 new(pdigit) AliZDCDigit(sector, digioot);
286 treeD->Fill();
287 //
288 if(sector[0]==1 || sector[0]==2){
289 sectorL[0] = sector[0]+3;
290 sectorL[1] = sector[1];
8574b308 291 for(Int_t res=0; res<2; res++){
d79f8d50 292 digioot[res] = Pedestal(sectorL[0], sectorL[1], res); // out-of-time ADCs
293 }
294 /*printf("\t DIGIToot added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
295 sectorL[0], sectorL[1], digioot[0], digioot[1]); // Chiara debugging!
296 */
297 //
298 new(pdigit) AliZDCDigit(sectorL, digioot);
299 treeD->Fill();
300 }
301 //
302 //printf("\t AliZDCDigitizer -> TreeD has %d entries\n",(Int_t) treeD->GetEntries());
303 }
304 }
8309c1ab 305 // write the output tree
306 loader->WriteDigits("OVERWRITE");
307 loader->UnloadDigits();
308}
309
310
311//_____________________________________________________________________________
312void AliZDCDigitizer::Fragmentation(Float_t impPar, Int_t specN, Int_t specP,
313 Int_t &freeSpecN, Int_t &freeSpecP) const
314{
315// simulate fragmentation of spectators
316
317 Int_t zz[100], nn[100];
318 AliZDCFragment frag(impPar);
8574b308 319 for(Int_t j=0; j<=99; j++){
8309c1ab 320 zz[j] =0;
321 nn[j] =0;
322 }
323
324 // Fragments generation
325 Int_t nAlpha;
326 frag.GenerateIMF(zz, nAlpha);
327
328 // Attach neutrons
329 Int_t ztot=0;
330 Int_t ntot=0;
331 frag.AttachNeutrons(zz, nn, ztot, ntot);
332 freeSpecN = specN-ntot-2*nAlpha;
333 freeSpecP = specP-ztot-2*nAlpha;
3848c666 334 // Removing deuterons
335 Int_t ndeu = (Int_t) (frag.DeuteronNumber());
336 freeSpecN -= ndeu;
337 //
8309c1ab 338 if(freeSpecN<0) freeSpecN=0;
339 if(freeSpecP<0) freeSpecP=0;
340 AliDebug(2, Form("FreeSpn = %d, FreeSpp = %d", freeSpecN, freeSpecP));
341}
342
343//_____________________________________________________________________________
344void AliZDCDigitizer::SpectatorSignal(Int_t SpecType, Int_t numEvents,
345 Float_t pm[3][5]) const
346{
347// add signal of the spectators
348
349 TFile* file = NULL;
8574b308 350 if(SpecType == 1) { // --- Signal for spectator neutrons
e689b8ea 351 file = TFile::Open("$ALICE_ROOT/ZDC/ZNsignalntu.root");
8574b308 352 } else if(SpecType == 2) { // --- Signal for spectator protons
e689b8ea 353 file = TFile::Open("$ALICE_ROOT/ZDC/ZPsignalntu.root");
8309c1ab 354 }
8574b308 355 if(!file || !file->IsOpen()) {
8309c1ab 356 AliError("Opening of file failed");
357 return;
358 }
359
360 TNtuple* zdcSignal = (TNtuple*) file->Get("ZDCSignal");
361 Int_t nentries = (Int_t) zdcSignal->GetEntries();
362
363 Float_t *entry, hitsSpec[7];
364 Int_t pl, i, j, k, iev=0, rnd[125], volume[2];
48642b09 365 for(pl=0;pl<125;pl++) rnd[pl] = 0;
8574b308 366 if(numEvents > 125) {
8309c1ab 367 AliWarning(Form("numEvents (%d) is larger than 125", numEvents));
368 numEvents = 125;
369 }
370 for(pl=0;pl<numEvents;pl++){
371 rnd[pl] = (Int_t) (9999*gRandom->Rndm());
85a96223 372 if(rnd[pl] >= 9999) rnd[pl] = 9998;
8309c1ab 373 //printf(" rnd[%d] = %d\n",pl,rnd[pl]);
374 }
375 // Sorting vector in ascending order with C function QSORT
376 qsort((void*)rnd,numEvents,sizeof(Int_t),comp);
377 do{
378 for(i=0; i<nentries; i++){
379 zdcSignal->GetEvent(i);
380 entry = zdcSignal->GetArgs();
381 if(entry[0] == rnd[iev]){
382 for(k=0; k<2; k++) volume[k] = (Int_t) entry[k+1];
383 for(j=0; j<7; j++) hitsSpec[j] = entry[j+3];
48642b09 384 //
8309c1ab 385 Float_t lightQ = hitsSpec[4];
386 Float_t lightC = hitsSpec[5];
78d18275 387 AliDebug(3, Form("SpectatorSignal -> vol = (%d, %d), lightQ = %.0f, lightC = %.0f",
8309c1ab 388 volume[0], volume[1], lightQ, lightC));
48642b09 389 //printf("\n Volume = (%d, %d), lightQ = %.0f, lightC = %.0f",
390 // volume[0], volume[1], lightQ, lightC);
8574b308 391 if(volume[0] < 3) { // ZN or ZP
8309c1ab 392 pm[volume[0]-1][0] += lightC;
393 pm[volume[0]-1][volume[1]] += lightQ;
48642b09 394 //printf("\n pm[%d][0] = %.0f, pm[%d][%d] = %.0f\n",(volume[0]-1),pm[volume[0]-1][0],
395 // (volume[0]-1),volume[1],pm[volume[0]-1][volume[1]]);
396 }
397 else {
8574b308 398 if(volume[1] == 1) pm[2][1] += lightC; // ZEM 1
48642b09 399 else pm[2][2] += lightQ; // ZEM 2
400 //printf("\n pm[2][1] = %.0f, pm[2][2] = %.0f\n",pm[2][1],pm[2][2]);
401 }
8309c1ab 402 }
403 else if(entry[0] > rnd[iev]){
404 iev++;
405 continue;
406 }
407 }
408 }while(iev<numEvents);
409
410 file->Close();
411 delete file;
412}
413
414
415//_____________________________________________________________________________
416Int_t AliZDCDigitizer::Phe2ADCch(Int_t Det, Int_t Quad, Float_t Light,
417 Int_t Res) const
418{
48642b09 419 // Evaluation of the ADC channel corresponding to the light yield Light
8a2624cc 420 Int_t vADCch = (Int_t) (Light * fPMGain[Det-1][Quad] * fADCRes[Res]);
78d18275 421 //printf("\t Phe2ADCch -> det %d quad %d - phe %.0f ADC %d\n", Det,Quad,Light,ADCch);
7f73eb6b 422
8a2624cc 423 return vADCch;
48642b09 424}
8309c1ab 425
48642b09 426//_____________________________________________________________________________
427Int_t AliZDCDigitizer::Pedestal(Int_t Det, Int_t Quad, Int_t Res) const
428{
8a2624cc 429 // Returns a pedestal for detector det, PM quad, channel with res.
430 //
abf60186 431 Float_t PedValue;
dbc8d7fc 432
abf60186 433 // Normal run
434 if(fIsCalibration == 0){
435 Float_t meanPed, Pedwidth;
436 Int_t index=0;
437 if(Det==1|| Det==2) index = 10*(Det-1)+Quad+5*Res; // ZN1, ZP1
438 else if(Det==3) index = 10*(Det-1)+(Quad-1)+Res; // ZEM
439 else if(Det==4|| Det==5) index = 10*(Det-2)+Quad+5*Res+4; // ZN2, ZP2
440 meanPed = fCalibData->GetMeanPed(index);
441 Pedwidth = fCalibData->GetMeanPedWidth(index);
442 PedValue = gRandom->Gaus(meanPed,Pedwidth);
443 //
444 /*printf("\t Pedestal -> det = %d, quad = %d, res = %d - Ped[%d] = %d\n",
445 Det, Quad, index,(Int_t) PedValue); // Chiara debugging!
446 */
447 }
48642b09 448
7f73eb6b 449 // To create calibration object
abf60186 450 else PedValue = gRandom->Gaus((40.+10.*gRandom->Rndm()),5.);
451
dbc8d7fc 452
abf60186 453 return (Int_t) PedValue;
8309c1ab 454}
455
456//_____________________________________________________________________________
78d18275 457AliCDBStorage* AliZDCDigitizer::SetStorage(const char *uri)
8309c1ab 458{
8309c1ab 459
78d18275 460 Bool_t deleteManager = kFALSE;
48642b09 461
78d18275 462 AliCDBManager *manager = AliCDBManager::Instance();
463 AliCDBStorage *defstorage = manager->GetDefaultStorage();
48642b09 464
78d18275 465 if(!defstorage || !(defstorage->Contains("ZDC"))){
466 AliWarning("No default storage set or default storage doesn't contain ZDC!");
467 manager->SetDefaultStorage(uri);
468 deleteManager = kTRUE;
469 }
470
471 AliCDBStorage *storage = manager->GetDefaultStorage();
472
473 if(deleteManager){
474 AliCDBManager::Instance()->UnsetDefaultStorage();
475 defstorage = 0; // the storage is killed by AliCDBManager::Instance()->Destroy()
476 }
477
478 return storage;
479}
48642b09 480
78d18275 481//_____________________________________________________________________________
7f73eb6b 482AliZDCCalibData* AliZDCDigitizer::GetCalibData() const
78d18275 483{
4fda3ba1 484
485 // Getting calibration object for ZDC set
486
487 AliCDBEntry *entry = AliCDBManager::Instance()->Get("ZDC/Calib/Data");
457a440d 488 if(!entry) AliFatal("No calibration data loaded!");
489
490 AliZDCCalibData *calibdata = dynamic_cast<AliZDCCalibData*> (entry->GetObject());
491 if(!calibdata) AliFatal("Wrong calibration object in calibration file!");
8309c1ab 492
78d18275 493 return calibdata;
8309c1ab 494}
4fda3ba1 495