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