1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
16 /* History of cvs commits:
19 * Revision 1.116 2007/10/10 09:05:10 schutz
20 * Changing name QualAss to QA
22 * Revision 1.115 2007/08/22 09:20:50 hristov
23 * Updated QA classes (Yves)
25 * Revision 1.114 2007/08/07 14:12:03 kharlov
26 * Quality assurance added (Yves Schutz)
28 * Revision 1.113 2007/07/18 16:29:54 policheh
29 * Raw Sdigits energy converted to GeV.
31 * Revision 1.112 2007/02/25 22:59:13 policheh
32 * Digits2Raw(): ALTRO buffer and mapping created per each DDL.
34 * Revision 1.111 2007/02/18 15:21:47 kharlov
35 * Corrections for memory leak in Digits2Raw due to AliAltroMapping
37 * Revision 1.110 2007/02/13 10:52:08 policheh
38 * Raw2SDigits() implemented
40 * Revision 1.109 2007/02/05 10:43:25 hristov
41 * Changes for correct initialization of Geant4 (Mihaela)
43 * Revision 1.108 2007/02/01 10:34:47 hristov
44 * Removing warnings on Solaris x86
46 * Revision 1.107 2007/01/29 16:29:37 kharlov
47 * Digits2Raw(): special workaround for digits with time out of range
49 * Revision 1.106 2007/01/17 17:28:56 kharlov
50 * Extract ALTRO sample generation to a separate class AliPHOSPulseGenerator
52 * Revision 1.105 2007/01/12 21:44:29 kharlov
53 * Simulate and reconstruct two gains simulaneouslsy
56 //_________________________________________________________________________
57 // Base Class for PHOS description:
58 // PHOS consists of a PbWO4 calorimeter (EMCA) and a gazeous charged
59 // particles detector (CPV or PPSD).
60 // The only provided method here is CreateMaterials,
61 // which defines the materials common to all PHOS versions.
63 //*-- Author: Laurent Aphecetche & Yves Schutz (SUBATECH)
64 //////////////////////////////////////////////////////////////////////////////
67 // --- ROOT system ---
71 #include <TVirtualMC.h>
76 // --- Standard library ---
78 // --- AliRoot header files ---
81 #include "AliPHOSGetter.h"
83 #include "AliPHOSDigitizer.h"
84 #include "AliPHOSSDigitizer.h"
85 #include "AliPHOSDigit.h"
86 #include "AliAltroBuffer.h"
87 #include "AliAltroMapping.h"
88 #include "AliCaloAltroMapping.h"
90 #include "AliCDBManager.h"
91 #include "AliCDBEntry.h"
92 #include "AliCDBStorage.h"
93 #include "AliPHOSCalibData.h"
94 #include "AliPHOSPulseGenerator.h"
96 #include "AliPHOSRawDecoder.h"
97 #include "AliPHOSRawDigiProducer.h"
98 #include "AliPHOSQAChecker.h"
99 #include "AliPHOSRecoParamEmc.h"
103 //____________________________________________________________________________
104 AliPHOS:: AliPHOS() : AliDetector()
111 //____________________________________________________________________________
112 AliPHOS::AliPHOS(const char* name, const char* title): AliDetector(name, title)
114 // ctor : title is used to identify the layout
117 //____________________________________________________________________________
122 //____________________________________________________________________________
123 AliDigitizer* AliPHOS::CreateDigitizer(AliRunDigitizer* manager) const
125 return new AliPHOSDigitizer(manager);
128 //____________________________________________________________________________
129 void AliPHOS::CreateMaterials()
131 // Definitions of materials to build PHOS and associated tracking media.
132 // media number in idtmed are 699 to 798.
134 // --- The PbWO4 crystals ---
135 Float_t aX[3] = {207.19, 183.85, 16.0} ;
136 Float_t zX[3] = {82.0, 74.0, 8.0} ;
137 Float_t wX[3] = {1.0, 1.0, 4.0} ;
140 AliMixture(0, "PbWO4$", aX, zX, dX, -3, wX) ;
143 // --- The polysterene scintillator (CH) ---
144 Float_t aP[2] = {12.011, 1.00794} ;
145 Float_t zP[2] = {6.0, 1.0} ;
146 Float_t wP[2] = {1.0, 1.0} ;
149 AliMixture(1, "Polystyrene$", aP, zP, dP, -2, wP) ;
152 AliMaterial(2, "Al$", 26.98, 13., 2.7, 8.9, 999., 0, 0) ;
153 // --- Absorption length is ignored ^
155 // --- Tyvek (CnH2n) ---
156 Float_t aT[2] = {12.011, 1.00794} ;
157 Float_t zT[2] = {6.0, 1.0} ;
158 Float_t wT[2] = {1.0, 2.0} ;
161 AliMixture(3, "Tyvek$", aT, zT, dT, -2, wT) ;
163 // --- Polystyrene foam ---
164 Float_t aF[2] = {12.011, 1.00794} ;
165 Float_t zF[2] = {6.0, 1.0} ;
166 Float_t wF[2] = {1.0, 1.0} ;
169 AliMixture(4, "Foam$", aF, zF, dF, -2, wF) ;
172 Float_t aTIT[3] = {47.88, 26.98, 54.94} ;
173 Float_t zTIT[3] = {22.0, 13.0, 25.0} ;
174 Float_t wTIT[3] = {69.0, 6.0, 1.0} ;
177 AliMixture(5, "Titanium$", aTIT, zTIT, dTIT, -3, wTIT);
180 AliMaterial(6, "Si$", 28.0855, 14., 2.33, 9.36, 42.3, 0, 0) ;
184 // --- Foam thermo insulation ---
185 Float_t aTI[2] = {12.011, 1.00794} ;
186 Float_t zTI[2] = {6.0, 1.0} ;
187 Float_t wTI[2] = {1.0, 1.0} ;
190 AliMixture(7, "Thermo Insul.$", aTI, zTI, dTI, -2, wTI) ;
193 Float_t aTX[4] = {16.0, 28.09, 12.011, 1.00794} ;
194 Float_t zTX[4] = {8.0, 14.0, 6.0, 1.0} ;
195 Float_t wTX[4] = {292.0, 68.0, 462.0, 736.0} ;
198 AliMixture(8, "Textolit$", aTX, zTX, dTX, -4, wTX) ;
201 Float_t aFR[4] = {16.0, 28.09, 12.011, 1.00794} ;
202 Float_t zFR[4] = {8.0, 14.0, 6.0, 1.0} ;
203 Float_t wFR[4] = {292.0, 68.0, 462.0, 736.0} ;
206 AliMixture(9, "FR4$", aFR, zFR, dFR, -4, wFR) ;
208 // --- The Composite Material for micromegas (so far polyetylene) ---
209 Float_t aCM[2] = {12.01, 1.} ;
210 Float_t zCM[2] = {6., 1.} ;
211 Float_t wCM[2] = {1., 2.} ;
212 Float_t dCM = 0.935 ;
214 AliMixture(10, "Compo Mat$", aCM, zCM, dCM, -2, wCM) ;
217 AliMaterial(11, "Cu$", 63.546, 29, 8.96, 1.43, 14.8, 0, 0) ;
219 // --- G10 : Printed Circuit material ---
220 Float_t aG10[4] = { 12., 1., 16., 28.} ;
221 Float_t zG10[4] = { 6., 1., 8., 14.} ;
222 Float_t wG10[4] = { .259, .288, .248, .205} ;
226 AliMixture(12, "G10$", aG10, zG10, dG10, -4, wG10);
229 AliMaterial(13, "Pb$", 207.2, 82, 11.35, 0.56, 0., 0, 0) ;
231 // --- The gas mixture ---
233 Float_t aCO[2] = {12.0, 16.0} ;
234 Float_t zCO[2] = {6.0, 8.0} ;
235 Float_t wCO[2] = {1.0, 2.0} ;
236 Float_t dCO = 0.001977 ;
238 AliMixture(14, "CO2$", aCO, zCO, dCO, -2, wCO);
241 Float_t dAr = 0.001782 ;
242 AliMaterial(15, "Ar$", 39.948, 18.0, dAr, 14.0, 0., 0, 0) ;
244 // Ar+CO2 Mixture (80% / 20%)
245 Float_t arContent = 0.80 ; // Ar-content of the ArCO2-mixture
246 Float_t aArCO[3] = {39.948, 12.0, 16.0} ;
247 Float_t zArCO[3] = {18.0 , 6.0, 8.0} ;
249 wArCO[0] = arContent;
250 wArCO[1] = (1-arContent)*1;
251 wArCO[2] = (1-arContent)*2;
252 Float_t dArCO = arContent*dAr + (1-arContent)*dCO ;
253 AliMixture(16, "ArCO2$", aArCO, zArCO, dArCO, -3, wArCO) ;
256 // --- Stainless steel (let it be pure iron) ---
257 AliMaterial(17, "Steel$", 55.845, 26, 7.87, 1.76, 0., 0, 0) ;
260 // --- Fiberglass ---
261 Float_t aFG[4] = {16.0, 28.09, 12.011, 1.00794} ;
262 Float_t zFG[4] = {8.0, 14.0, 6.0, 1.0} ;
263 Float_t wFG[4] = {292.0, 68.0, 462.0, 736.0} ;
266 AliMixture(18, "Fibergla$", aFG, zFG, dFG, -4, wFG) ;
268 // --- Cables in Air box ---
271 Float_t aCA[4] = { 1.,12.,55.8,63.5 };
272 Float_t zCA[4] = { 1.,6.,26.,29. };
273 Float_t wCA[4] = { .014,.086,.42,.48 };
274 Float_t dCA = 0.8 ; //this density is raw estimation, if you know better - correct
276 AliMixture(19, "Cables $", aCA, zCA, dCA, -4, wCA) ;
280 Float_t aAir[4]={12.0107,14.0067,15.9994,39.948};
281 Float_t zAir[4]={6.,7.,8.,18.};
282 Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
283 Float_t dAir = 1.20479E-3;
285 AliMixture(99, "Air$", aAir, zAir, dAir, 4, wAir) ;
287 // DEFINITION OF THE TRACKING MEDIA
289 // for PHOS: idtmed[699->798] equivalent to fIdtmed[0->100]
290 Int_t isxfld = gAlice->Field()->Integ() ;
291 Float_t sxmgmx = gAlice->Field()->Max() ;
293 // The scintillator of the calorimeter made of PBW04 -> idtmed[699]
294 AliMedium(0, "PHOS Xtal $", 0, 1,
295 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
297 // The scintillator of the CPV made of Polystyrene scintillator -> idtmed[700]
298 AliMedium(1, "CPV scint. $", 1, 1,
299 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
301 // Various Aluminium parts made of Al -> idtmed[701]
302 AliMedium(2, "Al parts $", 2, 0,
303 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.001, 0.001, 0, 0) ;
305 // The Tywek which wraps the calorimeter crystals -> idtmed[702]
306 AliMedium(3, "Tyvek wrapper$", 3, 0,
307 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.001, 0.001, 0, 0) ;
309 // The Polystyrene foam around the calorimeter module -> idtmed[703]
310 AliMedium(4, "Polyst. foam $", 4, 0,
311 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
313 // The Titanium around the calorimeter crystal -> idtmed[704]
314 AliMedium(5, "Titan. cover $", 5, 0,
315 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.0001, 0.0001, 0, 0) ;
317 // The Silicon of the pin diode to read out the calorimeter crystal -> idtmed[705]
318 AliMedium(6, "Si PIN $", 6, 0,
319 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.01, 0.01, 0, 0) ;
321 // The thermo insulating material of the box which contains the calorimeter module -> idtmed[706]
322 AliMedium(7, "Thermo Insul.$", 7, 0,
323 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
325 // The Textolit which makes up the box which contains the calorimeter module -> idtmed[707]
326 AliMedium(8, "Textolit $", 8, 0,
327 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
329 // FR4: The Plastic which makes up the frame of micromegas -> idtmed[708]
330 AliMedium(9, "FR4 $", 9, 0,
331 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.0001, 0, 0) ;
334 // The Composite Material for micromegas -> idtmed[709]
335 AliMedium(10, "CompoMat $", 10, 0,
336 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
338 // Copper -> idtmed[710]
339 AliMedium(11, "Copper $", 11, 0,
340 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.0001, 0, 0) ;
342 // G10: Printed Circuit material -> idtmed[711]
344 AliMedium(12, "G10 $", 12, 0,
345 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.01, 0, 0) ;
347 // The Lead -> idtmed[712]
349 AliMedium(13, "Lead $", 13, 0,
350 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
352 // The gas mixture: ArCo2 -> idtmed[715]
354 AliMedium(16, "ArCo2 $", 16, 1,
355 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.01, 0, 0) ;
357 // Stainless steel -> idtmed[716]
358 AliMedium(17, "Steel $", 17, 0,
359 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.0001, 0, 0) ;
361 // Fibergalss -> idtmed[717]
362 AliMedium(18, "Fiberglass$", 18, 0,
363 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
365 // Cables in air -> idtmed[718]
366 AliMedium(19, "Cables $", 19, 0,
367 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
369 // Air -> idtmed[798]
370 AliMedium(99, "Air $", 99, 0,
371 isxfld, sxmgmx, 10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
374 //_____________________________________________________________________________
378 // Initialises cuts for PHOS
380 // --- Set decent energy thresholds for gamma and electron tracking
381 Int_t * idtmed = fIdtmed->GetArray() - 699 ;
383 // Tracking threshold for photons and electrons in the scintillator crystal
384 gMC->Gstpar(idtmed[699], "CUTGAM",0.5E-4) ;
385 gMC->Gstpar(idtmed[699], "CUTELE",1.0E-4) ;
387 // --- Generate explicitly delta rays in the titan cover ---
388 gMC->Gstpar(idtmed[704], "LOSS",3.) ;
389 gMC->Gstpar(idtmed[704], "DRAY",1.) ;
390 // --- and in aluminium parts ---
391 gMC->Gstpar(idtmed[701], "LOSS",3.) ;
392 gMC->Gstpar(idtmed[701], "DRAY",1.) ;
393 // --- and in PIN diode
394 gMC->Gstpar(idtmed[705], "LOSS",3) ;
395 gMC->Gstpar(idtmed[705], "DRAY",1) ;
396 // --- and in the passive convertor
397 gMC->Gstpar(idtmed[712], "LOSS",3) ;
398 gMC->Gstpar(idtmed[712], "DRAY",1) ;
399 // Tracking threshold for photons and electrons in the gas ArC02
400 gMC->Gstpar(idtmed[715], "CUTGAM",1.E-5) ;
401 gMC->Gstpar(idtmed[715], "CUTELE",1.E-5) ;
402 gMC->Gstpar(idtmed[715], "CUTNEU",1.E-5) ;
403 gMC->Gstpar(idtmed[715], "CUTHAD",1.E-5) ;
404 gMC->Gstpar(idtmed[715], "CUTMUO",1.E-5) ;
405 gMC->Gstpar(idtmed[715], "BCUTE",1.E-5) ;
406 gMC->Gstpar(idtmed[715], "BCUTM",1.E-5) ;
407 gMC->Gstpar(idtmed[715], "DCUTE",1.E-5) ;
408 gMC->Gstpar(idtmed[715], "DCUTM",1.E-5) ;
409 gMC->Gstpar(idtmed[715], "PPCUTM",1.E-5) ;
410 gMC->Gstpar(idtmed[715], "LOSS",2.) ;
411 gMC->Gstpar(idtmed[715], "DRAY",0.) ;
412 gMC->Gstpar(idtmed[715], "STRA",2.) ;
415 //____________________________________________________________________________
416 void AliPHOS::Digits2Raw()
418 // convert digits of the current event to raw data
420 AliPHOSLoader * loader = dynamic_cast<AliPHOSLoader*>(fLoader) ;
423 loader->LoadDigits();
424 TClonesArray* digits = loader->Digits() ;
427 AliError(Form("No digits found !"));
432 AliPHOSGeometry* geom = GetGeometry();
434 AliError(Form("No geometry found !"));
438 // get mapping from OCDB
439 const TObjArray* maps = AliPHOSRecoParamEmc::GetMappings();
440 if(!maps) AliFatal("Cannot retrieve ALTRO mappings!!");
442 // some digitization constants
443 const Float_t kThreshold = 0.001; // skip digits below 1 MeV
444 const Int_t kAdcThreshold = 1; // Lower ADC threshold to write to raw data
448 // Create a shaper pulse object
449 AliPHOSPulseGenerator *pulse = new AliPHOSPulseGenerator();
451 Int_t *adcValuesLow = new Int_t[pulse->GetRawFormatTimeBins()];
452 Int_t *adcValuesHigh= new Int_t[pulse->GetRawFormatTimeBins()];
454 const Int_t maxDDL = 20;
455 AliAltroBuffer *buffer[maxDDL];
456 AliAltroMapping *mapping[maxDDL];
458 for(Int_t jDDL=0; jDDL<maxDDL; jDDL++) {
470 // loop over digits (assume ordered digits)
471 for (Int_t iDigit = 0; iDigit < digits->GetEntries(); iDigit++) {
472 AliPHOSDigit* digit = dynamic_cast<AliPHOSDigit *>(digits->At(iDigit)) ;
473 if (digit->GetEnergy() < kThreshold)
476 geom->AbsToRelNumbering(digit->GetId(), relId);
477 Int_t module = relId[0];
481 continue; // ignore digits from CPV
484 Int_t row = relId[2]-1;
485 Int_t col = relId[3]-1;
490 if(0<=row&&row<32 && 0<=col&&col<28) iRCU=0;
493 if(0<=row&&row<32 && 28<=col&&col<56) iRCU=1;
496 if(32<=row&&row<64 && 0<=col&&col<28) iRCU=2;
499 if(32<=row&&row<64 && 28<=col&&col<56) iRCU=3;
502 // PHOS EMCA has 4 DDL per module. Splitting is based on the (row,column) numbers.
503 // PHOS internal convention: 1<module<5.
504 Int_t iDDL = 4 * (module - 1) + iRCU;
507 if (iDDL != prevDDL) {
508 if (buffer[iDDL] == 0) {
509 // open new file and write dummy header
510 TString fileName = AliDAQ::DdlFileName("PHOS",iDDL);
512 TString path = gSystem->Getenv("ALICE_ROOT");
513 path += "/PHOS/mapping/RCU";
517 mapping[iDDL] = (AliAltroMapping*)maps->At(iRCU);
518 buffer[iDDL] = new AliAltroBuffer(fileName.Data(),mapping[iDDL]);
519 buffer[iDDL]->WriteDataHeader(kTRUE, kFALSE); //Dummy;
524 AliDebug(2,Form("digit E=%.4f GeV, t=%g s, (mod,col,row)=(%d,%d,%d)\n",
525 digit->GetEnergy(),digit->GetTimeR(),
526 relId[0]-1,relId[3]-1,relId[2]-1));
527 // if a signal is out of time range, write only trailer
528 if (digit->GetTimeR() > pulse->GetRawFormatTimeMax()*0.5 ) {
529 AliInfo("Signal is out of time range.\n");
530 buffer[iDDL]->FillBuffer(0);
531 buffer[iDDL]->FillBuffer(pulse->GetRawFormatTimeBins() ); // time bin
532 buffer[iDDL]->FillBuffer(3); // bunch length
533 buffer[iDDL]->WriteTrailer(3, relId[3]-1, relId[2]-1, 0); // trailer
535 // calculate the time response function
537 Double_t energy = 0 ;
539 if (digit->GetId() <= geom->GetNModules() * geom->GetNCristalsInModule()) {
540 energy=digit->GetEnergy();
541 if(energy>eMax) {eMax=energy; modMax=module; colMax=col; rowMax=row;}
544 energy = 0; // CPV raw data format is now know yet
546 pulse->SetAmplitude(energy);
547 pulse->SetTZero(digit->GetTimeR());
548 pulse->MakeSamples();
549 pulse->GetSamples(adcValuesHigh, adcValuesLow) ;
550 buffer[iDDL]->WriteChannel(relId[3]-1, relId[2]-1, 0,
551 pulse->GetRawFormatTimeBins(), adcValuesLow , kAdcThreshold);
552 buffer[iDDL]->WriteChannel(relId[3]-1, relId[2]-1, 1,
553 pulse->GetRawFormatTimeBins(), adcValuesHigh, kAdcThreshold);
557 // write real header and close last file
558 for (Int_t iDDL=0; iDDL<maxDDL; iDDL++) {
560 buffer[iDDL]->Flush();
561 buffer[iDDL]->WriteDataHeader(kFALSE, kFALSE);
563 //if (mapping[iDDL]) delete mapping[iDDL];
567 AliDebug(1,Form("Digit with max. energy: modMax %d colMax %d rowMax %d eMax %f\n",
568 modMax,colMax,rowMax,eMax));
571 loader->UnloadDigits();
574 //____________________________________________________________________________
575 void AliPHOS::Hits2SDigits()
577 // create summable digits
579 AliPHOSSDigitizer phosDigitizer(fLoader->GetRunLoader()->GetFileName().Data()) ;
580 phosDigitizer.SetEventRange(0, -1) ; // do all the events
582 phosDigitizer.ExecuteTask("all") ;
586 //____________________________________________________________________________
587 AliLoader* AliPHOS::MakeLoader(const char* topfoldername)
589 //different behaviour than standard (singleton getter)
590 // --> to be discussed and made eventually coherent
591 fLoader = new AliPHOSLoader(GetName(),topfoldername);
595 //____________________________________________________________________________
596 void AliPHOS::SetTreeAddress()
598 // Links Hits in the Tree to Hits array
601 sprintf(branchname,"%s",GetName());
602 // Branch address for hit tree
603 TTree *treeH = TreeH();
605 branch = treeH->GetBranch(branchname);
608 if (fHits == 0x0) fHits= new TClonesArray("AliPHOSHit",1000);
609 //AliInfo(Form("<%s> Setting Hits Address",GetName()));
610 branch->SetAddress(&fHits);
615 //____________________________________________________________________________
616 Bool_t AliPHOS::Raw2SDigits(AliRawReader* rawReader)
619 AliPHOSLoader * loader = dynamic_cast<AliPHOSLoader*>(fLoader) ;
622 tree = loader->TreeS() ;
624 loader->MakeTree("S");
625 tree = loader->TreeS() ;
628 TClonesArray * sdigits = loader->SDigits() ;
630 loader->MakeSDigitsArray();
631 sdigits = loader->SDigits();
635 AliPHOSRawDecoder dc(rawReader);
636 AliPHOSRawDigiProducer pr;
637 pr.MakeDigits(sdigits,&dc);
639 Int_t bufferSize = 32000 ;
640 // TBranch * sdigitsBranch = tree->Branch("PHOS",&sdigits,bufferSize);
641 tree->Branch("PHOS",&sdigits,bufferSize);
644 fLoader->WriteSDigits("OVERWRITE");