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[u/mrichter/AliRoot.git] / FMD / AliFMDDigitizer.cxx
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4347b38f 1/**************************************************************************
2 * Copyright(c) 2004, ALICE Experiment at CERN, All rights reserved. *
66d2ede1 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 **************************************************************************/
4347b38f 15/* $Id$ */
c2fc1258 16/** @file AliFMDDigitizer.cxx
17 @author Christian Holm Christensen <cholm@nbi.dk>
18 @date Mon Mar 27 12:38:26 2006
19 @brief FMD Digitizers implementation
20*/
4347b38f 21//////////////////////////////////////////////////////////////////////////////
22//
23// This class contains the procedures simulation ADC signal for the
24// Forward Multiplicity detector : Hits->Digits and Hits->SDigits
25//
26// Digits consists of
27// - Detector #
28// - Ring ID
29// - Sector #
30// - Strip #
31// - ADC count in this channel
32//
33// Digits consists of
34// - Detector #
35// - Ring ID
36// - Sector #
37// - Strip #
38// - Total energy deposited in the strip
39// - ADC count in this channel
40//
41// As the Digits and SDigits have so much in common, the classes
42// AliFMDDigitizer and AliFMDSDigitizer are implemented via a base
43// class AliFMDBaseDigitizer.
44//
45// +---------------------+
46// | AliFMDBaseDigitizer |
47// +---------------------+
48// ^
49// |
50// +----------+---------+
51// | |
52// +-----------------+ +------------------+
53// | AliFMDDigitizer | | AliFMDSDigitizer |
54// +-----------------+ +------------------+
55//
56// These classes has several paramters:
57//
58// fPedestal
59// fPedestalWidth
60// (Only AliFMDDigitizer)
61// Mean and width of the pedestal. The pedestal is simulated
62// by a Guassian, but derived classes my override MakePedestal
63// to simulate it differently (or pick it up from a database).
64//
65// fVA1MipRange
66// The dymamic MIP range of the VA1_ALICE pre-amplifier chip
67//
68// fAltroChannelSize
69// The largest number plus one that can be stored in one
70// channel in one time step in the ALTRO ADC chip.
71//
72// fSampleRate
73// How many times the ALTRO ADC chip samples the VA1_ALICE
74// pre-amplifier signal. The VA1_ALICE chip is read-out at
75// 10MHz, while it's possible to drive the ALTRO chip at
76// 25MHz. That means, that the ALTRO chip can have time to
77// sample each VA1_ALICE signal up to 2 times. Although it's
78// not certain this feature will be used in the production,
79// we'd like have the option, and so it should be reflected in
80// the code.
81//
4347b38f 82//
e802be3e 83// The shaping function of the VA1_ALICE is generally given by
4347b38f 84//
e802be3e 85// f(x) = A(1 - exp(-Bx))
4347b38f 86//
e802be3e 87// where A is the total charge collected in the pre-amp., and B is a
88// paramter that depends on the shaping time of the VA1_ALICE circut.
89//
90// When simulating the shaping function of the VA1_ALICe
91// pre-amp. chip, we have to take into account, that the shaping
92// function depends on the previous value of read from the pre-amp.
93//
94// That results in the following algorithm:
95//
96// last = 0;
97// FOR charge IN pre-amp. charge train DO
98// IF last < charge THEN
99// f(t) = (charge - last) * (1 - exp(-B * t)) + last
100// ELSE
101// f(t) = (last - charge) * exp(-B * t) + charge)
102// ENDIF
103// FOR i IN # samples DO
104// adc_i = f(i / (# samples))
105// DONE
106// last = charge
107// DONE
108//
109// Here,
110//
111// pre-amp. charge train
112// is a series of 128 charges read from the VA1_ALICE chip
113//
114// # samples
115// is the number of times the ALTRO ADC samples each of the 128
116// charges from the pre-amp.
4347b38f 117//
118// Where Q is the total charge collected by the VA1_ALICE
119// pre-amplifier. Q is then given by
120//
121// E S
122// Q = - -
123// e R
124//
125// where E is the total energy deposited in a silicon strip, R is the
126// dynamic range of the VA1_ALICE pre-amp (fVA1MipRange), e is the
127// energy deposited by a single MIP, and S ALTRO channel size in each
128// time step (fAltroChannelSize).
129//
130// The energy deposited per MIP is given by
131//
132// e = M * rho * w
133//
134// where M is the universal number 1.664, rho is the density of
135// silicon, and w is the depth of the silicon sensor.
136//
137// The final ADC count is given by
138//
139// C' = C + P
140//
141// where P is the (randomized) pedestal (see MakePedestal)
142//
143// This class uses the class template AliFMDMap<Type> to make an
144// internal cache of the energy deposted of the hits. The class
145// template is instantasized as
146//
147// typedef AliFMDMap<std::pair<Float_t, UShort_t> > AliFMDEdepMap;
148//
149// The first member of the values is the summed energy deposition in a
150// given strip, while the second member of the values is the number of
151// hits in a given strip. Using the second member, it's possible to
152// do some checks on just how many times a strip got hit, and what
153// kind of error we get in our reconstructed hits. Note, that this
154// information is currently not written to the digits tree. I think a
155// QA (Quality Assurance) digit tree is better suited for that task.
156// However, the information is there to be used in the future.
157//
158//
159// Latest changes by Christian Holm Christensen
160//
161//////////////////////////////////////////////////////////////////////////////
162
e802be3e 163// /1
164// | A(-1 + B + exp(-B))
165// | f(x) dx = ------------------- = 1
166// | B
167// / 0
168//
169// and B is the a parameter defined by the shaping time (fShapingTime).
170//
171// Solving the above equation, for A gives
172//
173// B
174// A = ----------------
175// -1 + B + exp(-B)
176//
177// So, if we define the function g: [0,1] -> [0:1] by
178//
179// / v
180// | Bu + exp(-Bu) - Bv - exp(-Bv)
181// g(u,v) = | f(x) dx = -A -----------------------------
182// | B
183// / u
184//
185// we can evaluate the ALTRO sample of the VA1_ALICE pre-amp between
186// any two times (u, v), by
187//
188//
189// B Bu + exp(-Bu) - Bv - exp(-Bv)
190// C = Q g(u,v) = - Q ---------------- -----------------------------
191// -1 + B + exp(-B) B
192//
193// Bu + exp(-Bu) - Bv - exp(-Bv)
194// = - Q -----------------------------
195// -1 + B + exp(-B)
196//
197
56b1929b 198#include <TTree.h> // ROOT_TTree
199#include <TRandom.h> // ROOT_TRandom
200#include <AliLog.h> // ALILOG_H
e802be3e 201#include "AliFMDDigitizer.h" // ALIFMDDIGITIZER_H
202#include "AliFMD.h" // ALIFMD_H
1a1fdef7 203#include "AliFMDGeometry.h" // ALIFMDGEOMETRY_H
204#include "AliFMDDetector.h" // ALIFMDDETECTOR_H
205#include "AliFMDRing.h" // ALIFMDRING_H
e802be3e 206#include "AliFMDHit.h" // ALIFMDHIT_H
207#include "AliFMDDigit.h" // ALIFMDDIGIT_H
8f6ee336 208#include "AliFMDParameters.h" // ALIFMDPARAMETERS_H
56b1929b 209#include <AliRunDigitizer.h> // ALIRUNDIGITIZER_H
210#include <AliRun.h> // ALIRUN_H
211#include <AliLoader.h> // ALILOADER_H
212#include <AliRunLoader.h> // ALIRUNLOADER_H
4347b38f 213
4347b38f 214//====================================================================
925e6570 215ClassImp(AliFMDBaseDigitizer)
1a1fdef7 216#if 0
217 ; // This is here to keep Emacs for indenting the next line
218#endif
4347b38f 219
220//____________________________________________________________________
221AliFMDBaseDigitizer::AliFMDBaseDigitizer()
222 : fRunLoader(0)
66d2ede1 223{
4347b38f 224 // Default ctor - don't use it
66d2ede1 225}
226
4347b38f 227//____________________________________________________________________
228AliFMDBaseDigitizer::AliFMDBaseDigitizer(AliRunDigitizer* manager)
229 : AliDigitizer(manager, "AliFMDBaseDigitizer", "FMD Digitizer base class"),
230 fRunLoader(0),
e802be3e 231 fEdep(AliFMDMap::kMaxDetectors,
232 AliFMDMap::kMaxRings,
233 AliFMDMap::kMaxSectors,
234 AliFMDMap::kMaxStrips)
66d2ede1 235{
4347b38f 236 // Normal CTOR
102e9e9c 237 AliDebug(1," processed");
4347b38f 238 SetShapingTime();
66d2ede1 239}
240
4347b38f 241//____________________________________________________________________
242AliFMDBaseDigitizer::AliFMDBaseDigitizer(const Char_t* name,
243 const Char_t* title)
244 : AliDigitizer(name, title),
245 fRunLoader(0),
e802be3e 246 fEdep(AliFMDMap::kMaxDetectors,
247 AliFMDMap::kMaxRings,
248 AliFMDMap::kMaxSectors,
249 AliFMDMap::kMaxStrips)
66d2ede1 250{
4347b38f 251 // Normal CTOR
252 AliDebug(1," processed");
4347b38f 253 SetShapingTime();
254}
3d44ce66 255
4347b38f 256//____________________________________________________________________
257AliFMDBaseDigitizer::~AliFMDBaseDigitizer()
258{
259 // Destructor
66d2ede1 260}
261
4347b38f 262//____________________________________________________________________
263Bool_t
264AliFMDBaseDigitizer::Init()
66d2ede1 265{
4347b38f 266 // Initialization
1e8f773e 267 AliFMDParameters::Instance()->Init();
4347b38f 268 return kTRUE;
66d2ede1 269}
270
88cb7938 271
4347b38f 272//____________________________________________________________________
8f6ee336 273UShort_t
274AliFMDBaseDigitizer::MakePedestal(UShort_t,
275 Char_t,
276 UShort_t,
277 UShort_t) const
278{
279 return 0;
280}
281
282//____________________________________________________________________
4347b38f 283void
284AliFMDBaseDigitizer::SumContributions(AliFMD* fmd)
285{
286 // Sum energy deposited contributions from each hit in a cache
287 // (fEdep).
288 if (!fRunLoader)
289 Fatal("SumContributions", "no run loader");
290
291 // Clear array of deposited energies
69b696b9 292 fEdep.Reset();
4347b38f 293
294 // Get the FMD loader
295 AliLoader* inFMD = fRunLoader->GetLoader("FMDLoader");
296 // And load the hits
297 inFMD->LoadHits("READ");
298
299 // Get the tree of hits
300 TTree* hitsTree = inFMD->TreeH();
301 if (!hitsTree) {
302 // Try again
303 inFMD->LoadHits("READ");
304 hitsTree = inFMD->TreeH();
305 }
306
307 // Get the FMD branch
308 TBranch* hitsBranch = hitsTree->GetBranch("FMD");
309 if (hitsBranch) fmd->SetHitsAddressBranch(hitsBranch);
310 else AliFatal("Branch FMD hit not found");
311
312 // Get a list of hits from the FMD manager
313 TClonesArray *fmdHits = fmd->Hits();
314
315 // Get number of entries in the tree
316 Int_t ntracks = Int_t(hitsTree->GetEntries());
317
8f6ee336 318 AliFMDParameters* param = AliFMDParameters::Instance();
a1f80595 319 Int_t read = 0;
4347b38f 320 // Loop over the tracks in the
321 for (Int_t track = 0; track < ntracks; track++) {
322 // Read in entry number `track'
a1f80595 323 read += hitsBranch->GetEntry(track);
4347b38f 324
325 // Get the number of hits
326 Int_t nhits = fmdHits->GetEntries ();
327 for (Int_t hit = 0; hit < nhits; hit++) {
328 // Get the hit number `hit'
329 AliFMDHit* fmdHit =
330 static_cast<AliFMDHit*>(fmdHits->UncheckedAt(hit));
331
332 // Extract parameters
333 UShort_t detector = fmdHit->Detector();
334 Char_t ring = fmdHit->Ring();
335 UShort_t sector = fmdHit->Sector();
336 UShort_t strip = fmdHit->Strip();
337 Float_t edep = fmdHit->Edep();
c2fc1258 338 UShort_t minstrip = param->GetMinStrip(detector, ring, sector, strip);
339 UShort_t maxstrip = param->GetMaxStrip(detector, ring, sector, strip);
8f6ee336 340 // Check if strip is `dead'
c2fc1258 341 if (param->IsDead(detector, ring, sector, strip)) {
342 AliDebug(5, Form("FMD%d%c[%2d,%3d] is marked as dead",
343 detector, ring, sector, strip));
344 continue;
345 }
346 // Check if strip is out-side read-out range
347 if (strip < minstrip || strip > maxstrip) {
348 AliDebug(5, Form("FMD%d%c[%2d,%3d] is outside range [%3d,%3d]",
349 detector, ring, sector, strip, minstrip, maxstrip));
350 continue;
351 }
352
8f6ee336 353 // Give warning in case of double hit
e802be3e 354 if (fEdep(detector, ring, sector, strip).fEdep != 0)
a1f80595 355 AliDebug(5, Form("Double hit in %d%c(%d,%d)",
4347b38f 356 detector, ring, sector, strip));
357
8f6ee336 358 // Sum energy deposition
e802be3e 359 fEdep(detector, ring, sector, strip).fEdep += edep;
360 fEdep(detector, ring, sector, strip).fN += 1;
4347b38f 361 // Add this to the energy deposited for this strip
362 } // hit loop
363 } // track loop
a1f80595 364 AliDebug(1, Form("Size of cache: %d bytes, read %d bytes",
365 sizeof(fEdep), read));
4347b38f 366}
66d2ede1 367
4347b38f 368//____________________________________________________________________
369void
370AliFMDBaseDigitizer::DigitizeHits(AliFMD* fmd) const
66d2ede1 371{
4347b38f 372 // For the stored energy contributions in the cache (fEdep), convert
373 // the energy signal to ADC counts, and store the created digit in
374 // the digits array (AliFMD::fDigits)
375 //
1a1fdef7 376 AliFMDGeometry* geometry = AliFMDGeometry::Instance();
377
4347b38f 378 TArrayI counts(3);
379 for (UShort_t detector=1; detector <= 3; detector++) {
380 // Get pointer to subdetector
1a1fdef7 381 AliFMDDetector* det = geometry->GetDetector(detector);
4347b38f 382 if (!det) continue;
383 for (UShort_t ringi = 0; ringi <= 1; ringi++) {
8f6ee336 384 Char_t ring = ringi == 0 ? 'I' : 'O';
4347b38f 385 // Get pointer to Ring
8f6ee336 386 AliFMDRing* r = det->GetRing(ring);
4347b38f 387 if (!r) continue;
388
389 // Get number of sectors
390 UShort_t nSectors = UShort_t(360. / r->GetTheta());
391 // Loop over the number of sectors
392 for (UShort_t sector = 0; sector < nSectors; sector++) {
393 // Get number of strips
394 UShort_t nStrips = r->GetNStrips();
395 // Loop over the stips
e802be3e 396 Float_t last = 0;
4347b38f 397 for (UShort_t strip = 0; strip < nStrips; strip++) {
e802be3e 398 // Reset the counter array to the invalid value -1
4347b38f 399 counts.Reset(-1);
e802be3e 400 // Reset the last `ADC' value when we've get to the end of a
401 // VA1_ALICE channel.
402 if (strip % 128 == 0) last = 0;
403
8f6ee336 404 Float_t edep = fEdep(detector, ring, sector, strip).fEdep;
405 ConvertToCount(edep, last, detector, ring, sector, strip, counts);
e802be3e 406 last = edep;
8f6ee336 407 AddDigit(fmd, detector, ring, sector, strip, edep,
408 UShort_t(counts[0]), Short_t(counts[1]),
409 Short_t(counts[2]));
4347b38f 410#if 0
411 // This checks if the digit created will give the `right'
412 // number of particles when reconstructed, using a naiive
413 // approach. It's here only as a quality check - nothing
414 // else.
8f6ee336 415 CheckDigit(digit, fEdep(detector, ring, sector, strip).fN,
4347b38f 416 counts);
417#endif
418 } // Strip
419 } // Sector
420 } // Ring
421 } // Detector
422}
88cb7938 423
4347b38f 424//____________________________________________________________________
4347b38f 425void
426AliFMDBaseDigitizer::ConvertToCount(Float_t edep,
e802be3e 427 Float_t last,
8f6ee336 428 UShort_t detector,
429 Char_t ring,
430 UShort_t sector,
431 UShort_t strip,
4347b38f 432 TArrayI& counts) const
433{
e802be3e 434 // Convert the total energy deposited to a (set of) ADC count(s).
4347b38f 435 //
e802be3e 436 // This is done by
437 //
438 // Energy_Deposited ALTRO_Channel_Size
439 // ADC = -------------------------- ------------------- + pedestal
440 // Energy_Deposition_Of_1_MIP VA1_ALICE_MIP_Range
4347b38f 441 //
e802be3e 442 // Energy_Deposited fAltroChannelSize
443 // = --------------------------------- ----------------- + pedestal
444 // 1.664 * Si_Thickness * Si_Density fVA1MipRange
445 //
4347b38f 446 //
e802be3e 447 // = Energy_Deposited * ConversionFactor + pedestal
448 //
449 // However, this is modified by the response function of the
450 // VA1_ALICE pre-amp. chip in case we are doing oversampling of the
451 // VA1_ALICE output.
452 //
453 // In that case, we get N=fSampleRate values of the ADC, and the
454 // `EnergyDeposited' is a function of which sample where are
455 // calculating the ADC for
456 //
457 // ADC_i = f(EnergyDeposited, i/N, Last) * ConversionFactor + pedestal
458 //
459 // where Last is the Energy deposited in the previous strip.
460 //
461 // Here, f is the shaping function of the VA1_ALICE. This is given
462 // by
463 //
464 // | (E - l) * (1 - exp(-B * t) + l if E > l
465 // f(E, t, l) = <
466 // | (l - E) * exp(-B * t) + E otherwise
467 //
468 //
469 // = E + (l - E) * ext(-B * t)
470 //
8f6ee336 471 AliFMDParameters* param = AliFMDParameters::Instance();
472 Float_t convF = 1/param->GetPulseGain(detector,ring,sector,strip);
473 UShort_t ped = MakePedestal(detector,ring,sector,strip);
474 UInt_t maxAdc = param->GetAltroChannelSize();
c2fc1258 475 UShort_t rate = param->GetSampleRate(detector,ring,sector,strip);
8f6ee336 476 UShort_t size = param->GetAltroChannelSize();
477
e802be3e 478 // In case we don't oversample, just return the end value.
8f6ee336 479 if (rate == 1) {
480 counts[0] = UShort_t(TMath::Min(edep * convF + ped, Float_t(size)));
e802be3e 481 return;
482 }
088f8e79 483
4347b38f 484 // Create a pedestal
088f8e79 485 Float_t b = fShapingTime;
8f6ee336 486 for (Ssiz_t i = 0; i < rate; i++) {
487 Float_t t = Float_t(i) / rate;
088f8e79 488 Float_t s = edep + (last - edep) * TMath::Exp(-b * t);
8f6ee336 489 counts[i] = UShort_t(TMath::Min(s * convF + ped, Float_t(maxAdc)));
4347b38f 490 }
491}
88cb7938 492
3d44ce66 493
4347b38f 494//====================================================================
925e6570 495ClassImp(AliFMDDigitizer)
66d2ede1 496
4347b38f 497//____________________________________________________________________
498AliFMDDigitizer::AliFMDDigitizer()
499 : AliFMDBaseDigitizer()
500{
501 // Default ctor - don't use it
502}
66d2ede1 503
4347b38f 504//____________________________________________________________________
505AliFMDDigitizer::AliFMDDigitizer(AliRunDigitizer* manager)
506 : AliFMDBaseDigitizer(manager)
507{
508 // Normal CTOR
509 AliDebug(1," processed");
4347b38f 510}
66d2ede1 511
4347b38f 512//____________________________________________________________________
513void
514AliFMDDigitizer::Exec(Option_t*)
515{
516 // Get the output manager
517 TString outFolder(fManager->GetOutputFolderName());
518 AliRunLoader* out =
519 AliRunLoader::GetRunLoader(outFolder.Data());
520 // Get the FMD output manager
521 AliLoader* outFMD = out->GetLoader("FMDLoader");
522
523 // Get the input loader
524 TString inFolder(fManager->GetInputFolderName(0));
525 fRunLoader =
a3537838 526 AliRunLoader::GetRunLoader(inFolder.Data());
4347b38f 527 if (!fRunLoader) {
528 AliError("Can not find Run Loader for input stream 0");
529 return;
530 }
531 // Get the AliRun object
532 if (!fRunLoader->GetAliRun()) fRunLoader->LoadgAlice();
533
534 // Get the AliFMD object
8f6ee336 535 AliFMD* fmd =
536 static_cast<AliFMD*>(fRunLoader->GetAliRun()->GetDetector("FMD"));
4347b38f 537 if (!fmd) {
538 AliError("Can not get FMD from gAlice");
539 return;
540 }
541
542 Int_t nFiles= fManager->GetNinputs();
543 for (Int_t inputFile = 0; inputFile < nFiles; inputFile++) {
544 AliDebug(1,Form(" Digitizing event number %d",
545 fManager->GetOutputEventNr()));
546 // Get the current loader
547 fRunLoader =
548 AliRunLoader::GetRunLoader(fManager->GetInputFolderName(inputFile));
549 if (!fRunLoader) Fatal("Exec", "no run loader");
550 // Cache contriutions
551 SumContributions(fmd);
552 }
553 // Digitize the event
554 DigitizeHits(fmd);
555
556 // Load digits from the tree
557 outFMD->LoadDigits("update");
558 // Get the tree of digits
559 TTree* digitTree = outFMD->TreeD();
560 if (!digitTree) {
561 outFMD->MakeTree("D");
562 digitTree = outFMD->TreeD();
563 }
564 digitTree->Reset();
565 // Make a branch in the tree
566 TClonesArray* digits = fmd->Digits();
567 fmd->MakeBranchInTree(digitTree, fmd->GetName(), &(digits), 4000, 0);
568 // TBranch* digitBranch = digitTree->GetBranch(fmd->GetName());
569 // Fill the tree
a1f80595 570 Int_t write = 0;
571 write = digitTree->Fill();
572 AliDebug(1, Form("Wrote %d bytes to digit tree", write));
66d2ede1 573
4347b38f 574 // Write the digits to disk
575 outFMD->WriteDigits("OVERWRITE");
576 outFMD->UnloadHits();
577 outFMD->UnloadDigits();
4110645f 578
4347b38f 579 // Reset the digits in the AliFMD object
580 fmd->ResetDigits();
581}
3d44ce66 582
88cb7938 583
4347b38f 584//____________________________________________________________________
585UShort_t
8f6ee336 586AliFMDDigitizer::MakePedestal(UShort_t detector,
587 Char_t ring,
588 UShort_t sector,
589 UShort_t strip) const
4347b38f 590{
088f8e79 591 // Make a pedestal
8f6ee336 592 AliFMDParameters* param =AliFMDParameters::Instance();
593 Float_t mean =param->GetPedestal(detector,ring,sector,strip);
594 Float_t width =param->GetPedestalWidth(detector,ring,sector,strip);
595 return UShort_t(TMath::Max(gRandom->Gaus(mean, width), 0.));
4347b38f 596}
88cb7938 597
4347b38f 598//____________________________________________________________________
599void
600AliFMDDigitizer::AddDigit(AliFMD* fmd,
601 UShort_t detector,
602 Char_t ring,
603 UShort_t sector,
604 UShort_t strip,
605 Float_t /* edep */,
606 UShort_t count1,
607 Short_t count2,
608 Short_t count3) const
609{
088f8e79 610 // Add a digit
69b696b9 611 fmd->AddDigitByFields(detector, ring, sector, strip, count1, count2, count3);
4347b38f 612}
3d44ce66 613
4347b38f 614//____________________________________________________________________
615void
8f6ee336 616AliFMDDigitizer::CheckDigit(AliFMDDigit* digit,
4347b38f 617 UShort_t nhits,
618 const TArrayI& counts)
619{
088f8e79 620 // Check that digit is consistent
8f6ee336 621 AliFMDParameters* param = AliFMDParameters::Instance();
622 UShort_t det = digit->Detector();
623 Char_t ring = digit->Ring();
624 UShort_t sec = digit->Sector();
625 UShort_t str = digit->Strip();
626 Float_t mean = param->GetPedestal(det,ring,sec,str);
627 Float_t width = param->GetPedestalWidth(det,ring,sec,str);
628 UShort_t range = param->GetVA1MipRange();
629 UShort_t size = param->GetAltroChannelSize();
630 Int_t integral = counts[0];
4347b38f 631 if (counts[1] >= 0) integral += counts[1];
632 if (counts[2] >= 0) integral += counts[2];
8f6ee336 633 integral -= Int_t(mean + 2 * width);
4347b38f 634 if (integral < 0) integral = 0;
635
8f6ee336 636 Float_t convF = Float_t(range) / size;
088f8e79 637 Float_t mips = integral * convF;
4347b38f 638 if (mips > Float_t(nhits) + .5 || mips < Float_t(nhits) - .5)
639 Warning("CheckDigit", "Digit -> %4.2f MIPS != %d +/- .5 hits",
640 mips, nhits);
641}
66d2ede1 642
4347b38f 643//====================================================================
925e6570 644ClassImp(AliFMDSDigitizer)
3d44ce66 645
4347b38f 646//____________________________________________________________________
647AliFMDSDigitizer::AliFMDSDigitizer()
648{
649 // Default ctor - don't use it
650}
88cb7938 651
4347b38f 652//____________________________________________________________________
653AliFMDSDigitizer::AliFMDSDigitizer(const Char_t* headerFile,
654 const Char_t* /* sdigfile */)
655 : AliFMDBaseDigitizer("FMDSDigitizer", "FMD SDigitizer")
656{
657 // Normal CTOR
658 AliDebug(1," processed");
3d44ce66 659
4347b38f 660 fRunLoader = AliRunLoader::GetRunLoader(); // Open(headerFile);
661 if (!fRunLoader)
662 Fatal("AliFMDSDigitizer", "cannot open session, header file '%s'",
663 headerFile);
664 AliLoader* loader = fRunLoader->GetLoader("FMDLoader");
665 if (!loader)
666 Fatal("AliFMDSDigitizer", "cannot find FMD loader in specified event");
3d44ce66 667
4347b38f 668 // Add task to tasks folder
669 loader->PostSDigitizer(this);
afddaa11 670
4347b38f 671}
88cb7938 672
4347b38f 673//____________________________________________________________________
674AliFMDSDigitizer::~AliFMDSDigitizer()
675{
088f8e79 676 // Destructor
4347b38f 677 AliLoader* loader = fRunLoader->GetLoader("FMDLoader");
678 loader->CleanSDigitizer();
679}
3d44ce66 680
4347b38f 681//____________________________________________________________________
682void
683AliFMDSDigitizer::Exec(Option_t*)
684{
685 // Get the output manager
686 if (!fRunLoader) {
687 Error("Exec", "Run loader is not set");
688 return;
689 }
690 if (!fRunLoader->GetAliRun()) fRunLoader->LoadgAlice();
691 if (!fRunLoader->TreeE()) fRunLoader->LoadHeader();
692
693 AliLoader* fmdLoader = fRunLoader->GetLoader("FMDLoader");
694 if (!fmdLoader) Fatal("Exec", "no FMD loader");
695
696 // Get the AliFMD object
697 AliFMD* fmd =
698 static_cast<AliFMD*>(fRunLoader->GetAliRun()->GetDetector("FMD"));
699 if (!fmd) {
700 AliError("Can not get FMD from gAlice");
701 return;
702 }
703
704 Int_t nEvents = Int_t(fRunLoader->TreeE()->GetEntries());
705 for (Int_t event = 0; event < nEvents; event++) {
706 AliDebug(1,Form(" Digitizing event number %d", event));
707 // Get the current loader
708 fRunLoader->GetEvent(event);
709
710 if (!fmdLoader->TreeS()) fmdLoader->MakeTree("S");
711 // Make a branch
712 fmd->MakeBranch("S");
713
714 // Cache contriutions
715 SumContributions(fmd);
716
717 // Digitize the event
718 DigitizeHits(fmd);
719
720 fmdLoader->TreeS()->Reset();
721 fmdLoader->TreeS()->Fill();
722 fmdLoader->WriteSDigits("OVERWRITE");
723 }
724}
66d2ede1 725
4347b38f 726//____________________________________________________________________
727void
728AliFMDSDigitizer::AddDigit(AliFMD* fmd,
729 UShort_t detector,
730 Char_t ring,
731 UShort_t sector,
732 UShort_t strip,
733 Float_t edep,
734 UShort_t count1,
735 Short_t count2,
736 Short_t count3) const
737{
088f8e79 738 // Add a summable digit
69b696b9 739 fmd->AddSDigitByFields(detector, ring, sector, strip, edep,
740 count1, count2, count3);
66d2ede1 741}
4347b38f 742
743
744
745//____________________________________________________________________
746//
747// EOF
748//
88cb7938 749
750
751
66d2ede1 752