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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"
39#include "AliCDBManager.h"
40#include "AliCDBEntry.h"
41#include "AliZDCSDigit.h"
42#include "AliZDCDigit.h"
43#include "AliZDCFragment.h"
44#include "AliZDCDigitizer.h"
45
46class AliCDBStorage;
47class AliZDCCalibData;
48
49ClassImp(AliZDCDigitizer)
50
51
52//____________________________________________________________________________
53AliZDCDigitizer::AliZDCDigitizer()
54{
55// Default constructor
56
57}
58
59//____________________________________________________________________________
60AliZDCDigitizer::AliZDCDigitizer(AliRunDigitizer* manager):
61 AliDigitizer(manager)
62{
63 fIsCalibration=0; //By default the simulation doesn't create calib. data
64// fIsCalibration=1; //To create calib. data
65 // Get calibration data
66 fCalibData = GetCalibData();
67 if(fIsCalibration!=0) printf("\n\t AliZDCDigitizer -> Creating calibration data (pedestals)\n");
68
69}
70
71//____________________________________________________________________________
72AliZDCDigitizer::~AliZDCDigitizer()
73{
74// Destructor
75
76}
77
78
79//____________________________________________________________________________
80AliZDCDigitizer::AliZDCDigitizer(const AliZDCDigitizer &digitizer):
81 AliDigitizer()
82{
83 // Copy constructor
84
85 for(Int_t i=0; i<6; i++){
86 for(Int_t j=0; j<5; j++){
87 fPMGain[i][j] = digitizer.fPMGain[i][j];
88 }
89 }
90 for(Int_t i=0; i<2; i++) fADCRes[i] = digitizer.fADCRes[i];
91 fIsCalibration = digitizer.fIsCalibration;
92 fCalibData = digitizer.fCalibData;
93
94}
95
96//____________________________________________________________________________
97Bool_t AliZDCDigitizer::Init()
98{
99 // Initialize the digitizer
100 // NB -> PM gain vs. HV & ADC resolutions will move to DCDB ***************
101 for(Int_t j = 0; j < 5; j++){
102 fPMGain[0][j] = 50000.;
103 fPMGain[1][j] = 100000.;
104 fPMGain[2][j] = 100000.;
105 fPMGain[3][j] = 50000.;
106 fPMGain[4][j] = 100000.;
107 fPMGain[5][j] = 100000.;
108 }
109 // ADC Caen V965
110 fADCRes[0] = 0.0000008; // ADC Resolution high gain: 200 fC/adcCh
111 fADCRes[1] = 0.0000064; // ADC Resolution low gain: 25 fC/adcCh
112
113 return kTRUE;
114}
115
116//____________________________________________________________________________
117void AliZDCDigitizer::Exec(Option_t* /*option*/)
118{
119 // Execute digitization
120
121 // ------------------------------------------------------------
122 // !!! 2nd ZDC set added
123 // *** 1st 3 arrays are digits from REAL (simulated) hits
124 // *** last 2 are copied from simulated digits
125 // --- pm[0][...] = light in ZN right [C, Q1, Q2, Q3, Q4]
126 // --- pm[1][...] = light in ZP right [C, Q1, Q2, Q3, Q4]
127 // --- pm[2][...] = light in ZEM [x, 1, 2, x, x]
128 // --- pm[3][...] = light in ZN left [C, Q1, Q2, Q3, Q4] ->NEW!
129 // --- pm[4][...] = light in ZP left [C, Q1, Q2, Q3, Q4] ->NEW!
130 // ------------------------------------------------------------
131 Float_t pm[5][5];
132 for(Int_t iSector1=0; iSector1<5; iSector1++)
133 for(Int_t iSector2=0; iSector2<5; iSector2++){
134 pm[iSector1][iSector2] = 0;
135 }
136
137 // ------------------------------------------------------------
138 // ### Out of time ADC added (22 channels)
139 // --- same codification as for signal PTMs (see above)
140 // ------------------------------------------------------------
141 Float_t pmoot[5][5];
142 for(Int_t iSector1=0; iSector1<5; iSector1++)
143 for(Int_t iSector2=0; iSector2<5; iSector2++){
144 pmoot[iSector1][iSector2] = 0;
145 }
146
147 // impact parameter and number of spectators
148 Float_t impPar = -1;
149 Int_t specN = 0;
150 Int_t specP = 0;
151
152 // loop over input streams
153 for(Int_t iInput = 0; iInput<fManager->GetNinputs(); iInput++){
154
155 // get run loader and ZDC loader
156 AliRunLoader* runLoader =
157 AliRunLoader::GetRunLoader(fManager->GetInputFolderName(iInput));
158 AliLoader* loader = runLoader->GetLoader("ZDCLoader");
159 if(!loader) continue;
160
161 // load sdigits
162 loader->LoadSDigits();
163 TTree* treeS = loader->TreeS();
164 if(!treeS) continue;
165 AliZDCSDigit sdigit;
166 AliZDCSDigit* psdigit = &sdigit;
167 treeS->SetBranchAddress("ZDC", &psdigit);
168
169 // loop over sdigits
170 for(Int_t iSDigit=0; iSDigit<treeS->GetEntries(); iSDigit++){
171 treeS->GetEntry(iSDigit);
172 //
173 if(!psdigit) continue;
174 if((sdigit.GetSector(1) < 0) || (sdigit.GetSector(1) > 4)){
175 AliError(Form("\nsector[0] = %d, sector[1] = %d\n",
176 sdigit.GetSector(0), sdigit.GetSector(1)));
177 continue;
178 }
179 //
180 pm[(sdigit.GetSector(0))-1][sdigit.GetSector(1)] += sdigit.GetLightPM();
181 /*printf("\n\t Detector %d, Tower %d -> pm[%d][%d] = %.0f \n",
182 sdigit.GetSector(0), sdigit.GetSector(1),sdigit.GetSector(0)-1,
183 sdigit.GetSector(1), pm[sdigit.GetSector(0)-1][sdigit.GetSector(1)]); // Chiara debugging!
184 */
185 }
186
187 loader->UnloadSDigits();
188
189 // get the impact parameter and the number of spectators in case of hijing
190 if(!runLoader->GetAliRun()) runLoader->LoadgAlice();
191 AliHeader* header = runLoader->GetAliRun()->GetHeader();
192 if(!header) continue;
193 AliGenEventHeader* genHeader = header->GenEventHeader();
194 if(!genHeader) continue;
195 if(!genHeader->InheritsFrom(AliGenHijingEventHeader::Class())) continue;
196 impPar = ((AliGenHijingEventHeader*) genHeader)->ImpactParameter();
197 //
198 specN = ((AliGenHijingEventHeader*) genHeader)->ProjSpectatorsn();
199 specP = ((AliGenHijingEventHeader*) genHeader)->ProjSpectatorsp();
200 AliDebug(2, Form("\n AliZDCDigitizer -> b = %f fm, Nspecn = %d, Nspecp = %d\n",
201 impPar, specN, specP));
202 printf("\n\t AliZDCDigitizer -> b = %f fm, # generated spectator n = %d,"
203 " # generated spectator p = %d\n", impPar, specN, specP);
204 }
205
206 // add spectators
207 if(impPar >= 0) {
208 Int_t freeSpecN, freeSpecP;
209 Fragmentation(impPar, specN, specP, freeSpecN, freeSpecP);
210 printf("\n\t AliZDCDigitizer -> Adding signal for %d free spectator n\n",freeSpecN);
211 SpectatorSignal(1, freeSpecN, pm);
212 printf("\t AliZDCDigitizer -> Adding signal for %d free spectator p\n\n",freeSpecP);
213 SpectatorSignal(2, freeSpecP, pm);
214 }
215
216
217 // get the output run loader and loader
218 AliRunLoader* runLoader =
219 AliRunLoader::GetRunLoader(fManager->GetOutputFolderName());
220 AliLoader* loader = runLoader->GetLoader("ZDCLoader");
221 if(!loader) {
222 AliError("no ZDC loader found");
223 return;
224 }
225
226 // create the output tree
227 const char* mode = "update";
228 if(runLoader->GetEventNumber() == 0) mode = "recreate";
229 loader->LoadDigits(mode);
230 loader->MakeTree("D");
231 TTree* treeD = loader->TreeD();
232 AliZDCDigit digit;
233 AliZDCDigit* pdigit = &digit;
234 const Int_t kBufferSize = 4000;
235 treeD->Branch("ZDC", "AliZDCDigit", &pdigit, kBufferSize);
236
237 // Create digits
238 Int_t sector[2], sectorL[2];
239 Int_t digi[2], digiL[2], digioot[2];
240 for(sector[0]=1; sector[0]<=3; sector[0]++){
241 for(sector[1]=0; sector[1]<5; sector[1]++){
242 if((sector[0]==3) && ((sector[1]<1) || (sector[1]>2))) continue;
243 for(Int_t res=0; res<2; res++){
244 digi[res] = Phe2ADCch(sector[0], sector[1], pm[sector[0]-1][sector[1]], res)
245 + Pedestal(sector[0], sector[1], res);
246 }
247 /*printf("\t DIGIT added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
248 sector[0], sector[1], digi[0], digi[1]); // Chiara debugging!
249 */
250 //
251 new(pdigit) AliZDCDigit(sector, digi);
252 treeD->Fill();
253 //
254 // --- Adding digits for 2nd ZDC set (left side w.r.t. IP) ---
255 // --- they are copied from right ZDC digits
256 if(sector[0]==1 || sector[0]==2){
257 sectorL[0] = sector[0]+3;
258 sectorL[1] = sector[1];
259 for(Int_t res=0; res<2; res++){
260 digiL[res] = Phe2ADCch(sectorL[0], sectorL[1], pm[sector[0]-1][sector[1]], res)
261 + Pedestal(sectorL[0], sectorL[1], res);
262 }
263 /*printf("\t DIGIT added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
264 sectorL[0], sectorL[1], digiL[0], digiL[1]); // Chiara debugging!
265 */
266 //
267 new(pdigit) AliZDCDigit(sectorL, digiL);
268 treeD->Fill();
269 }
270 }
271 } // Loop over detector
272 // Adding in-time digits for 2 reference PTM signals (after signal ch.)
273 // (for the moment the ref. signal is completely invented assuming a PMgain of 5*10^4!)
274 Int_t sectorRef[2];
275 sectorRef[1] = 5;
276 Int_t sigRef[2];
277 if(fIsCalibration==0) {sigRef[0]=100; sigRef[1]=800;}
278 else {sigRef[0]=0; sigRef[1]=0;}
279 //
280 for(Int_t iref=0; iref<2; iref++){
281 sectorRef[0] = 3*iref+1;
282 for(Int_t res=0; res<2; res++){
283 sigRef[res] += Pedestal(sectorRef[0], sectorRef[1], res);
284 }
285 /*printf("\t RefDigit added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
286 sectorRef[0], sectorRef[1], sigRef[0], sigRef[1]); // Chiara debugging!
287 */
288 new(pdigit) AliZDCDigit(sectorRef, sigRef);
289 treeD->Fill();
290 }
291 //
292 // --- Adding digits for out-of-time channels after signal digits
293 for(sector[0]=1; sector[0]<=3; sector[0]++){
294 for(sector[1]=0; sector[1]<5; sector[1]++){
295 if((sector[0]==3) && ((sector[1]<1) || (sector[1]>2))) continue;
296 for(Int_t res=0; res<2; res++){
297 digioot[res] = Pedestal(sector[0], sector[1], res); // out-of-time ADCs
298 }
299 /*printf("\t DIGIToot added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
300 sector[0], sector[1], digioot[0], digioot[1]); // Chiara debugging!
301 */
302 //
303 new(pdigit) AliZDCDigit(sector, digioot);
304 treeD->Fill();
305 //
306 if(sector[0]==1 || sector[0]==2){
307 sectorL[0] = sector[0]+3;
308 sectorL[1] = sector[1];
309 for(Int_t res=0; res<2; res++){
310 digioot[res] = Pedestal(sectorL[0], sectorL[1], res); // out-of-time ADCs
311 }
312 /*printf("\t DIGIToot added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
313 sectorL[0], sectorL[1], digioot[0], digioot[1]); // Chiara debugging!
314 */
315 //
316 new(pdigit) AliZDCDigit(sectorL, digioot);
317 treeD->Fill();
318 }
319 //
320 }
321 }
322 // Adding out-of-time digits for 2 reference PTM signals (after out-of-time ch.)
323 Int_t sigRefoot[2];
324 for(Int_t iref=0; iref<2; iref++){
325 sectorRef[0] = 3*iref+1;
326 for(Int_t res=0; res<2; res++){
327 sigRefoot[res] = Pedestal(sectorRef[0], sectorRef[1], res);
328 }
329 /*printf("\t RefDigitoot added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
330 sectorRef[0], sectorRef[1], sigRefoot[0], sigRefoot[1]); // Chiara debugging!
331 */
332 new(pdigit) AliZDCDigit(sectorRef, sigRefoot);
333 treeD->Fill();
334
335 }
336 //printf("\t AliZDCDigitizer -> TreeD has %d entries\n",(Int_t) treeD->GetEntries());
337
338 // write the output tree
339 loader->WriteDigits("OVERWRITE");
340 loader->UnloadDigits();
341}
342
343
344//_____________________________________________________________________________
345void AliZDCDigitizer::Fragmentation(Float_t impPar, Int_t specN, Int_t specP,
346 Int_t &freeSpecN, Int_t &freeSpecP) const
347{
348// simulate fragmentation of spectators
349
350 Int_t zz[100], nn[100];
351 AliZDCFragment frag(impPar);
352 for(Int_t j=0; j<=99; j++){
353 zz[j] =0;
354 nn[j] =0;
355 }
356
357 // Fragments generation
358 Int_t nAlpha;
359 frag.GenerateIMF(zz, nAlpha);
360
361 // Attach neutrons
362 Int_t ztot=0;
363 Int_t ntot=0;
364 frag.AttachNeutrons(zz, nn, ztot, ntot);
365 freeSpecN = specN-ntot-2*nAlpha;
366 freeSpecP = specP-ztot-2*nAlpha;
367 // Removing deuterons
368 Int_t ndeu = (Int_t) (frag.DeuteronNumber());
369 freeSpecN -= ndeu;
370 //
371 if(freeSpecN<0) freeSpecN=0;
372 if(freeSpecP<0) freeSpecP=0;
373 AliDebug(2, Form("FreeSpn = %d, FreeSpp = %d", freeSpecN, freeSpecP));
374}
375
376//_____________________________________________________________________________
377void AliZDCDigitizer::SpectatorSignal(Int_t SpecType, Int_t numEvents,
378 Float_t pm[3][5]) const
379{
380// add signal of the spectators
381
382 TFile* file = NULL;
383 if(SpecType == 1) { // --- Signal for spectator neutrons
384 file = TFile::Open("$ALICE_ROOT/ZDC/ZNsignalntu.root");
385 } else if(SpecType == 2) { // --- Signal for spectator protons
386 file = TFile::Open("$ALICE_ROOT/ZDC/ZPsignalntu.root");
387 }
388 if(!file || !file->IsOpen()) {
389 AliError("Opening of file failed");
390 return;
391 }
392
393 TNtuple* zdcSignal = (TNtuple*) file->Get("ZDCSignal");
394 Int_t nentries = (Int_t) zdcSignal->GetEntries();
395
396 Float_t *entry, hitsSpec[7];
397 Int_t pl, i, j, k, iev=0, rnd[125], volume[2];
398 for(pl=0;pl<125;pl++) rnd[pl] = 0;
399 if(numEvents > 125) {
400 AliWarning(Form("numEvents (%d) is larger than 125", numEvents));
401 numEvents = 125;
402 }
403 for(pl=0;pl<numEvents;pl++){
404 rnd[pl] = (Int_t) (9999*gRandom->Rndm());
405 if(rnd[pl] >= 9999) rnd[pl] = 9998;
406 //printf(" rnd[%d] = %d\n",pl,rnd[pl]);
407 }
408 // Sorting vector in ascending order with C function QSORT
409 qsort((void*)rnd,numEvents,sizeof(Int_t),comp);
410 do{
411 for(i=0; i<nentries; i++){
412 zdcSignal->GetEvent(i);
413 entry = zdcSignal->GetArgs();
414 if(entry[0] == rnd[iev]){
415 for(k=0; k<2; k++) volume[k] = (Int_t) entry[k+1];
416 for(j=0; j<7; j++) hitsSpec[j] = entry[j+3];
417 //
418 Float_t lightQ = hitsSpec[4];
419 Float_t lightC = hitsSpec[5];
420 AliDebug(3, Form("SpectatorSignal -> vol = (%d, %d), lightQ = %.0f, lightC = %.0f",
421 volume[0], volume[1], lightQ, lightC));
422 //printf("\n Volume = (%d, %d), lightQ = %.0f, lightC = %.0f",
423 // volume[0], volume[1], lightQ, lightC);
424 if(volume[0] < 3) { // ZN or ZP
425 pm[volume[0]-1][0] += lightC;
426 pm[volume[0]-1][volume[1]] += lightQ;
427 //printf("\n pm[%d][0] = %.0f, pm[%d][%d] = %.0f\n",(volume[0]-1),pm[volume[0]-1][0],
428 // (volume[0]-1),volume[1],pm[volume[0]-1][volume[1]]);
429 }
430 else {
431 if(volume[1] == 1) pm[2][1] += lightC; // ZEM 1
432 else pm[2][2] += lightQ; // ZEM 2
433 //printf("\n pm[2][1] = %.0f, pm[2][2] = %.0f\n",pm[2][1],pm[2][2]);
434 }
435 }
436 else if(entry[0] > rnd[iev]){
437 iev++;
438 continue;
439 }
440 }
441 }while(iev<numEvents);
442
443 file->Close();
444 delete file;
445}
446
447
448//_____________________________________________________________________________
449Int_t AliZDCDigitizer::Phe2ADCch(Int_t Det, Int_t Quad, Float_t Light,
450 Int_t Res) const
451{
452 // Evaluation of the ADC channel corresponding to the light yield Light
453 Int_t vADCch = (Int_t) (Light * fPMGain[Det-1][Quad] * fADCRes[Res]);
454 //printf("\t Phe2ADCch -> det %d quad %d - phe %.0f ADC %d\n", Det,Quad,Light,ADCch);
455
456 return vADCch;
457}
458
459//_____________________________________________________________________________
460Int_t AliZDCDigitizer::Pedestal(Int_t Det, Int_t Quad, Int_t Res) const
461{
462 // Returns a pedestal for detector det, PM quad, channel with res.
463 //
464 Float_t pedValue;
465
466 // Normal run
467 if(fIsCalibration == 0){
468 Float_t meanPed, pedWidth;
469 Int_t index=0;
470 if(Quad!=5){
471 if(Det==1 || Det==2) index = 10*(Det-1)+Quad+5*Res; // ZN1, ZP1
472 else if(Det==3) index = 10*(Det-1)+(Quad-1)+Res; // ZEM
473 else if(Det==4 || Det==5) index = 10*(Det-2)+Quad+5*Res+4; // ZN2, ZP2
474 }
475 else index = 10*(Quad-1)+(Det-1)*1/3+2*Res+4; // Reference PMs
476 //
477 meanPed = fCalibData->GetMeanPed(index);
478 pedWidth = fCalibData->GetMeanPedWidth(index);
479 pedValue = gRandom->Gaus(meanPed,pedWidth);
480 //
481 /*printf("\t Pedestal -> det = %d, quad = %d, res = %d - Ped[%d] = %d\n",
482 Det, Quad, Res, index,(Int_t) pedValue); // Chiara debugging!
483 */
484 }
485 // To create calibration object
486 else{
487 if(Res == 0) pedValue = gRandom->Gaus((35.+10.*gRandom->Rndm()),(0.5+0.2*gRandom->Rndm())); //High gain
488 else pedValue = gRandom->Gaus((250.+100.*gRandom->Rndm()),(3.5+2.*gRandom->Rndm())); //Low gain
489 }
490
491 return (Int_t) pedValue;
492}
493
494//_____________________________________________________________________________
495AliCDBStorage* AliZDCDigitizer::SetStorage(const char *uri)
496{
497
498 Bool_t deleteManager = kFALSE;
499
500 AliCDBManager *manager = AliCDBManager::Instance();
501 AliCDBStorage *defstorage = manager->GetDefaultStorage();
502
503 if(!defstorage || !(defstorage->Contains("ZDC"))){
504 AliWarning("No default storage set or default storage doesn't contain ZDC!");
505 manager->SetDefaultStorage(uri);
506 deleteManager = kTRUE;
507 }
508
509 AliCDBStorage *storage = manager->GetDefaultStorage();
510
511 if(deleteManager){
512 AliCDBManager::Instance()->UnsetDefaultStorage();
513 defstorage = 0; // the storage is killed by AliCDBManager::Instance()->Destroy()
514 }
515
516 return storage;
517}
518
519//_____________________________________________________________________________
520AliZDCCalibData* AliZDCDigitizer::GetCalibData() const
521{
522
523 // Getting calibration object for ZDC set
524
525 AliCDBEntry *entry = AliCDBManager::Instance()->Get("ZDC/Calib/Data");
526 if(!entry) AliFatal("No calibration data loaded!");
527
528 AliZDCCalibData *calibdata = dynamic_cast<AliZDCCalibData*> (entry->GetObject());
529 if(!calibdata) AliFatal("Wrong calibration object in calibration file!");
530
531 return calibdata;
532}
533