Line data Source code
1 : //____________________________________________________________________
2 : //
3 : // This is a class that constructs AliFMDRecPoint objects from of Digits
4 : // This class reads either digits from a TClonesArray or raw data from
5 : // a DDL file (or similar), and stores the read ADC counts in an
6 : // internal cache (fAdcs). The rec-points are made via the naiive
7 : // method.
8 : //
9 : //-- Authors: Evgeny Karpechev(INR) and Alla Maevsksia
10 : // Latest changes by Christian Holm Christensen <cholm@nbi.dk>
11 : //
12 : //
13 : //____________________________________________________________________
14 : /**************************************************************************
15 : * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
16 : * *
17 : * Author: The ALICE Off-line Project. *
18 : * Contributors are mentioned in the code where appropriate. *
19 : * *
20 : * Permission to use, copy, modify and distribute this software and its *
21 : * documentation strictly for non-commercial purposes is hereby granted *
22 : * without fee, provided that the above copyright notice appears in all *
23 : * copies and that both the copyright notice and this permission notice *
24 : * appear in the supporting documentation. The authors make no claims *
25 : * about the suitability of this software for any purpose. It is *
26 : * provided "as is" without express or implied warranty. *
27 : **************************************************************************/
28 : /* $Id$ */
29 : /**
30 : * @file AliFMDReconstructor.cxx
31 : * @author Christian Holm Christensen <cholm@nbi.dk>
32 : * @date Mon Mar 27 12:47:09 2006
33 : * @brief FMD reconstruction
34 : */
35 :
36 : // #include <AliLog.h> // ALILOG_H
37 : // #include <AliRun.h> // ALIRUN_H
38 : #include "AliFMDDebug.h"
39 : #include "AliFMDGeometry.h" // ALIFMDGEOMETRY_H
40 : #include "AliFMDParameters.h" // ALIFMDPARAMETERS_H
41 : #include "AliFMDAltroMapping.h" // ALIFMDALTROMAPPING_H
42 : #include "AliFMDDigit.h" // ALIFMDDIGIT_H
43 : #include "AliFMDSDigit.h" // ALIFMDDIGIT_H
44 : #include "AliFMDReconstructor.h" // ALIFMDRECONSTRUCTOR_H
45 : #include "AliFMDRecoParam.h" // ALIFMDRECOPARAM_H
46 : #include "AliFMDRawReader.h" // ALIFMDRAWREADER_H
47 : #include "AliFMDRecPoint.h" // ALIFMDMULTNAIIVE_H
48 : #include "AliESDEvent.h" // ALIESDEVENT_H
49 : #include "AliESDVertex.h" // ALIESDVERTEX_H
50 : #include "AliESDTZERO.h" // ALIESDVERTEX_H
51 : #include <AliESDFMD.h> // ALIESDFMD_H
52 : #include <TMath.h>
53 : #include <TH1.h>
54 : #include <TH2.h>
55 : #include <TFile.h>
56 : #include <climits>
57 : #include "AliFMDESDRevertexer.h"
58 :
59 :
60 : class AliRawReader;
61 :
62 : //____________________________________________________________________
63 12 : ClassImp(AliFMDReconstructor)
64 : #if 0
65 : ; // This is here to keep Emacs for indenting the next line
66 : #endif
67 :
68 : //____________________________________________________________________
69 : AliFMDReconstructor::AliFMDReconstructor()
70 2 : : AliReconstructor(),
71 2 : fMult(0x0),
72 2 : fNMult(0),
73 2 : fTreeR(0x0),
74 2 : fCurrentVertex(0),
75 2 : fESDObj(0x0),
76 2 : fNoiseFactor(0),
77 2 : fAngleCorrect(kTRUE),
78 2 : fVertexType(kNoVertex),
79 2 : fESD(0x0),
80 2 : fDiagnostics(kFALSE),
81 2 : fDiagStep1(0),
82 2 : fDiagStep2(0),
83 2 : fDiagStep3(0),
84 2 : fDiagStep4(0),
85 2 : fDiagAll(0),
86 2 : fBad(0),
87 2 : fZombie(false)
88 10 : {
89 : // Make a new FMD reconstructor object - default CTOR.
90 2 : SetNoiseFactor();
91 2 : SetAngleCorrect();
92 8 : if (AliDebugLevel() > 0) fDiagnostics = kTRUE;
93 16 : for(Int_t det = 1; det<=3; det++) {
94 6 : fZS[det-1] = kFALSE;
95 6 : fZSFactor[det-1] = 0;
96 : }
97 4 : }
98 :
99 : //____________________________________________________________________
100 : AliFMDReconstructor::~AliFMDReconstructor()
101 12 : {
102 : // Destructor
103 4 : if (fMult) fMult->Delete();
104 6 : if (fMult) delete fMult;
105 6 : if (fESDObj) delete fESDObj;
106 6 : }
107 :
108 : //____________________________________________________________________
109 : void
110 : AliFMDReconstructor::Init()
111 : {
112 : // Initialize the reconstructor
113 :
114 : // Initialize the geometry
115 4 : AliFMDGeometry* geom = AliFMDGeometry::Instance();
116 2 : geom->Init();
117 2 : geom->InitTransformations();
118 :
119 : // Initialize the parameters
120 2 : AliFMDParameters* param = AliFMDParameters::Instance();
121 2 : if (param->Init(true) != 0) {
122 0 : AliError("Failed to initialize parameters, making zombie");
123 0 : fZombie = true;
124 0 : }
125 : else
126 2 : fZombie = false;
127 :
128 : // Current vertex position
129 2 : fCurrentVertex = 0;
130 : // Create array of reconstructed strip multiplicities
131 : // fMult = new TClonesArray("AliFMDRecPoint", 51200);
132 : // Create ESD output object
133 4 : fESDObj = new AliESDFMD;
134 :
135 : // Check if we need diagnostics histograms
136 4 : if (!fDiagnostics) return;
137 0 : AliInfo("Making diagnostics histograms");
138 0 : if (!fDiagStep1) {
139 0 : fDiagStep1 = new TH2I("diagStep1", "Read ADC vs. Noise surpressed ADC",
140 : 1024, -.5, 1023.5, 1024, -.5, 1023.5);
141 0 : fDiagStep1->SetDirectory(0);
142 0 : fDiagStep1->GetXaxis()->SetTitle("ADC (read)");
143 0 : fDiagStep1->GetYaxis()->SetTitle(Form("ADC (noise surpressed %4.f)",
144 0 : fNoiseFactor));
145 0 : }
146 0 : if (!fDiagStep2) {
147 0 : fDiagStep2 = new TH2F("diagStep2", "ADC vs Edep deduced",
148 : 1024, -.5, 1023.5, 100, 0, 2);
149 0 : fDiagStep2->SetDirectory(0);
150 0 : fDiagStep2->GetXaxis()->SetTitle("ADC (noise surpressed)");
151 0 : fDiagStep2->GetYaxis()->SetTitle("#Delta E [GeV]");
152 0 : }
153 0 : if (!fDiagStep3) {
154 0 : fDiagStep3 = new TH2F("diagStep3", "Edep vs Edep path corrected",
155 : 100, 0., 2., 100, 0., 2.);
156 0 : fDiagStep3->SetDirectory(0);
157 0 : fDiagStep3->GetXaxis()->SetTitle("#Delta E [GeV]");
158 0 : fDiagStep3->GetYaxis()->SetTitle("#Delta E/#Delta x #times #delta x [GeV]");
159 0 : }
160 0 : if (!fDiagStep4) {
161 0 : fDiagStep4 = new TH2F("diagStep4", "Edep vs Multiplicity deduced",
162 : 100, 0., 2., 100, -.1, 19.9);
163 0 : fDiagStep4->SetDirectory(0);
164 0 : fDiagStep4->GetXaxis()->SetTitle("#Delta E/#Delta x #times #delta x [GeV]");
165 0 : fDiagStep4->GetYaxis()->SetTitle("Multiplicity");
166 0 : fDiagAll = new TH2F("diagAll", "Read ADC vs Multiplicity deduced",
167 : 1024, -.5, 1023.5, 100, -.1, 19.9);
168 0 : }
169 0 : if (fDiagAll) {
170 0 : fDiagAll->SetDirectory(0);
171 0 : fDiagAll->GetXaxis()->SetTitle("ADC (read)");
172 0 : fDiagAll->GetYaxis()->SetTitle("Multiplicity");
173 0 : }
174 2 : }
175 :
176 : //____________________________________________________________________
177 : void
178 : AliFMDReconstructor::ConvertDigits(AliRawReader* reader,
179 : TTree* digitsTree) const
180 : {
181 : // Convert Raw digits to AliFMDDigit's in a tree
182 8 : if (fZombie) {
183 0 : AliWarning("I'm a zombie - cannot do anything");
184 0 : return;
185 : }
186 8 : AliFMDDebug(1, ("Reading raw data into digits tree"));
187 4 : if (!digitsTree) {
188 0 : AliError("No digits tree passed");
189 0 : return;
190 : }
191 : static TClonesArray* array = 0;
192 6 : if (!array) array = new TClonesArray("AliFMDDigit");
193 4 : digitsTree->Branch("FMD", &array);
194 4 : array->Clear();
195 :
196 4 : AliFMDRawReader rawRead(reader, digitsTree);
197 : // rawRead.SetSampleRate(fFMD->GetSampleRate());
198 : // rawRead.Exec();
199 4 : rawRead.ReadAdcs(array);
200 :
201 4 : Int_t nWrite = digitsTree->Fill();
202 20 : AliDebugF(1, "Got a grand total of %d digits, wrote %d bytes to tree",
203 : array->GetEntriesFast(), nWrite);
204 :
205 :
206 8 : AliFMDAltroMapping* map = AliFMDParameters::Instance()->GetAltroMap();
207 32 : for (UShort_t i = 1; i <= 3; i++) {
208 12 : fZS[i-1] = rawRead.IsZeroSuppressed(map->Detector2DDL(i));
209 12 : fZSFactor[i-1] = rawRead.NoiseFactor(map->Detector2DDL(i));
210 60 : AliDebugF(2, "Noise factor for FMD%hu: %d", i, fZSFactor[i-1]);
211 : }
212 8 : }
213 :
214 : //____________________________________________________________________
215 : void
216 : AliFMDReconstructor::GetVertex(AliESDEvent* esd) const
217 : {
218 : // Return the vertex to use.
219 : // This is obtained from the ESD object.
220 : // If not found, a warning is issued.
221 32 : fVertexType = kNoVertex;
222 16 : fCurrentVertex = 0;
223 16 : if (!esd) return;
224 :
225 8 : const AliESDVertex* vertex = esd->GetPrimaryVertex();
226 8 : if (!vertex) vertex = esd->GetPrimaryVertexSPD();
227 8 : if (!vertex) vertex = esd->GetPrimaryVertexTPC();
228 8 : if (!vertex) vertex = esd->GetVertex();
229 :
230 8 : if (vertex) {
231 16 : AliFMDDebug(2, ("Got %s (%s) from ESD: %f",
232 : vertex->GetName(), vertex->GetTitle(), vertex->GetZ()));
233 8 : fCurrentVertex = vertex->GetZ();
234 8 : fVertexType = kESDVertex;
235 8 : return;
236 : }
237 0 : else if (esd->GetESDTZERO()) {
238 0 : AliFMDDebug(2, ("Got primary vertex from T0: %f", esd->GetT0zVertex()));
239 0 : fCurrentVertex = esd->GetT0zVertex();
240 0 : fVertexType = kESDVertex;
241 0 : return;
242 : }
243 0 : AliWarning("Didn't get any vertex from ESD or generator");
244 16 : }
245 :
246 : //____________________________________________________________________
247 : Int_t
248 : AliFMDReconstructor::GetIdentifier() const
249 : {
250 : // Get the detector identifier.
251 : // Note the actual value is cached so that we do not
252 : // need to do many expensive string comparisons.
253 24 : static Int_t idx = AliReconstruction::GetDetIndex(GetDetectorName());
254 8 : return idx;
255 0 : }
256 :
257 : //____________________________________________________________________
258 : const AliFMDRecoParam*
259 : AliFMDReconstructor::GetParameters() const
260 : {
261 : // Get the reconstruction parameters.
262 : //
263 : // Return:
264 : // Pointer to reconstruction parameters or null if not found or wrong type
265 16 : Int_t iDet = GetIdentifier(); // Was 12 - but changed on Cvetans request
266 8 : const AliDetectorRecoParam* params = AliReconstructor::GetRecoParam(iDet);
267 16 : if (!params || params->IsA() != AliFMDRecoParam::Class()) return 0;
268 8 : return static_cast<const AliFMDRecoParam*>(params);
269 8 : }
270 :
271 : //____________________________________________________________________
272 : void
273 : AliFMDReconstructor::UseRecoParam(Bool_t set) const
274 : {
275 : //
276 : // Set-up reconstructor to use values from reconstruction
277 : // parameters, if present, for this event. If the argument @a set
278 : // is @c false, then restore preset values.
279 : //
280 : // Parameters:
281 : // set
282 : //
283 20 : static Float_t savedNoiseFactor = fNoiseFactor;
284 20 : static Bool_t savedAngleCorrect = fAngleCorrect;
285 16 : if (set) {
286 8 : const AliFMDRecoParam* params = GetParameters();
287 8 : if (params) {
288 8 : fNoiseFactor = params->NoiseFactor();
289 8 : fAngleCorrect = params->AngleCorrect();
290 8 : }
291 : return;
292 : }
293 8 : fNoiseFactor = savedNoiseFactor;
294 8 : fAngleCorrect = savedAngleCorrect;
295 24 : }
296 :
297 :
298 : //____________________________________________________________________
299 : void
300 : AliFMDReconstructor::MarkDeadChannels(AliESDFMD* esd) const
301 : {
302 : // Loop over all entries of the ESD and mark
303 : // those that are dead as such
304 : // - otherwise put in the zero signal.
305 16 : AliFMDParameters* param = AliFMDParameters::Instance();
306 :
307 64 : for (UShort_t d = 1; d <= 3; d++) {
308 24 : UShort_t nR = (d == 1 ? 1 : 2);
309 :
310 128 : for (UShort_t q = 0; q < nR; q++) {
311 40 : Char_t r = (q == 0 ? 'I' : 'O');
312 40 : UShort_t nS = (q == 0 ? 20 : 40);
313 40 : UShort_t nT = (q == 0 ? 512 : 256);
314 :
315 2320 : for (UShort_t s = 0; s < nS; s++) {
316 821440 : for (UShort_t t = 0; t < nT; t++) {
317 : // A strip can be marked `bad' for two reasons:
318 : //
319 : // - The raw reader fails to read the value
320 : // - The strip is marked in OCDB as bad (IsDead)
321 : //
322 : // Hence, a dead strip will always be marked kInvalid here,
323 : // while a non-dead bad-read strip will be filled with 0.
324 409600 : if (fBad(d, r, s, t)) {
325 0 : AliDebugF(5, "Marking FMD%d%c[%2d,%3d] as bad", d, r, s, t);
326 0 : esd->SetMultiplicity(d, r, s, t, AliESDFMD::kInvalidMult);
327 0 : }
328 409600 : if (param->IsDead(d, r, s, t)) {
329 0 : AliDebugF(5, "Marking FMD%d%c[%2d,%3d] as dead", d, r, s, t);
330 0 : esd->SetMultiplicity(d, r, s, t, AliESDFMD::kInvalidMult);
331 : // esd->SetEta(d, r, s, t, AliESDFMD::kInvalidEta);
332 0 : }
333 819200 : else if (esd->Multiplicity(d, r, s, t) == AliESDFMD::kInvalidMult) {
334 409600 : AliDebugF(20, "Setting null signal in FMD%d%c[%2d,%3d]",
335 : d, r, s, t);
336 0 : esd->SetMultiplicity(d, r, s, t, 0);
337 0 : }
338 : else {
339 1228800 : AliDebugF(10, "Setting FMD%d%c[%2d,%3d]=%f",d,r,s,t,
340 : esd->Multiplicity(d, r, s, t));
341 : }
342 : }
343 : }
344 : }
345 : }
346 8 : }
347 :
348 : //____________________________________________________________________
349 : Bool_t
350 : AliFMDReconstructor::PreReconstruct() const
351 : {
352 24 : AliFMDDebug(1, ("Before reoconstructing"));
353 8 : if (fZombie) {
354 0 : AliWarning("I'm a zombie - cannot do anything");
355 0 : return false;
356 : }
357 :
358 : // Get our vertex
359 8 : GetVertex(fESD);
360 :
361 : // Reset bad flags
362 8 : fBad.Reset(false);
363 :
364 : // Reset the output ESD
365 8 : if (fESDObj) {
366 8 : fESDObj->Clear();
367 :
368 : // Pre-set eta values
369 64 : for (UShort_t d=1; d<=3; d++) {
370 24 : UShort_t nQ = (d == 1 ? 1 : 2);
371 128 : for (UShort_t q=0; q<nQ; q++) {
372 40 : UShort_t nStr = (q == 0 ? 512 : 256);
373 40 : Char_t r = (q == 0 ? 'I' : 'O');
374 :
375 32848 : for (UShort_t t = 0; t < nStr; t++) {
376 16384 : Float_t eta, phi;
377 : // Always use sector 0
378 16384 : PhysicalCoordinates(d, r, 0, t, eta, phi);
379 16384 : fESDObj->SetEta(d, r, 0, t, eta);
380 16384 : }
381 : }
382 : }
383 8 : }
384 :
385 :
386 8 : return true;
387 8 : }
388 :
389 : //____________________________________________________________________
390 : void
391 : AliFMDReconstructor::Reconstruct(AliFMDRawReader& rawReader) const
392 : {
393 : // Reconstruct directly from raw data (no intermediate output on
394 : // digit tree or rec point tree).
395 : //
396 : // Parameters:
397 : // rawReader FMD Raw event reader
398 0 : AliFMDDebug(1, ("Reconstructing from FMD raw reader"));
399 0 : if (!PreReconstruct()) return;
400 :
401 0 : UShort_t det, sec, str, fac;
402 0 : Short_t adc, oldDet = -1;
403 0 : Bool_t zs;
404 0 : Char_t rng;
405 :
406 0 : UseRecoParam(kTRUE);
407 0 : while (rawReader.NextSignal(det, rng, sec, str, adc, zs, fac)) {
408 0 : if (det != oldDet) {
409 0 : fZS[det-1] = zs;
410 0 : fZSFactor[det-1] = fac;
411 0 : oldDet = det;
412 0 : }
413 0 : ProcessSignal(det, rng, sec, str, adc);
414 : }
415 0 : UseRecoParam(kFALSE);
416 :
417 0 : }
418 :
419 : //____________________________________________________________________
420 : void
421 : AliFMDReconstructor::Reconstruct(AliRawReader* reader, TTree*) const
422 : {
423 : // Reconstruct directly from raw data (no intermediate output on
424 : // digit tree or rec point tree).
425 : //
426 : // Parameters:
427 : // reader Raw event reader
428 : // ctree Not used - 'cluster tree' to store rec-points in.
429 0 : AliFMDDebug(1, ("Reconstructing from raw reader"));
430 0 : if (fZombie) {
431 0 : AliWarning("I'm a zombie - cannot do anything");
432 0 : return;
433 : }
434 0 : AliFMDRawReader rawReader(reader, 0);
435 0 : Reconstruct(rawReader);
436 0 : }
437 :
438 : //____________________________________________________________________
439 : void
440 : AliFMDReconstructor::Digitize(AliRawReader* reader, TClonesArray* sdigits) const
441 : {
442 : // Reconstruct directly from raw data (no intermediate output on
443 : // digit tree or rec point tree).
444 : //
445 : // Parameters:
446 : // reader Raw event reader
447 : // ctree Not used.
448 0 : if (fZombie) {
449 0 : AliWarning("I'm a zombie - cannot do anything");
450 0 : return;
451 : }
452 0 : AliFMDRawReader rawReader(reader, 0);
453 :
454 0 : UShort_t det, sec, str, sam, rat, fac;
455 0 : Short_t adc, oldDet = -1;
456 0 : Bool_t zs;
457 0 : Char_t rng;
458 :
459 0 : UseRecoParam(kTRUE);
460 0 : while (rawReader.NextSample(det, rng, sec, str, sam, rat, adc, zs, fac)) {
461 0 : if (!rawReader.SelectSample(sam, rat)) continue;
462 0 : if (det != oldDet) {
463 0 : fZS[det-1] = zs;
464 0 : fZSFactor[det-1] = fac;
465 0 : oldDet = det;
466 0 : }
467 0 : DigitizeSignal(sdigits, det, rng, sec, str, sam, adc);
468 : }
469 0 : UseRecoParam(kFALSE);
470 0 : }
471 :
472 : //____________________________________________________________________
473 : void
474 : AliFMDReconstructor::Reconstruct(TTree* digitsTree,
475 : TTree* clusterTree) const
476 : {
477 : // Reconstruct event from digits in tree
478 : // Get the FMD branch holding the digits.
479 : // FIXME: The vertex may not be known yet, so we may have to move
480 : // some of this to FillESD.
481 : //
482 : // Parameters:
483 : // digitsTree Pointer to a tree containing digits
484 : // clusterTree Pointer to output tree
485 : //
486 16 : if (!PreReconstruct()) return;
487 :
488 12 : if (!fMult) fMult = new TClonesArray("AliFMDRecPoint");
489 :
490 16 : AliFMDDebug(1, ("Reconstructing from digits in a tree"));
491 :
492 : // Get the digitis array
493 16 : static TClonesArray* digits = new TClonesArray("AliFMDDigit");
494 8 : TBranch* digitBranch = digitsTree->GetBranch("FMD");
495 8 : if (!digitBranch) {
496 0 : Error("Exec", "No digit branch for the FMD found");
497 0 : return;
498 : }
499 8 : digitBranch->SetAddress(&digits);
500 :
501 16 : if (digits) digits->Clear();
502 16 : if (fMult) fMult->Clear();
503 :
504 : // Create rec-point output branch
505 8 : fNMult = 0;
506 8 : fTreeR = clusterTree;
507 8 : fTreeR->Branch("FMD", &fMult);
508 :
509 24 : AliDebug(5, "Getting entry 0 from digit branch");
510 8 : digitBranch->GetEntry(0);
511 :
512 24 : AliDebugF(5, "Processing %d digits", digits->GetEntriesFast());
513 8 : UseRecoParam(kTRUE);
514 8 : ProcessDigits(digits);
515 8 : UseRecoParam(kFALSE);
516 :
517 8 : Int_t written = clusterTree->Fill();
518 16 : AliFMDDebug(10, ("Filled %d bytes into cluster tree", written));
519 : // digits->Delete();
520 : // delete digits;
521 16 : }
522 :
523 :
524 : //____________________________________________________________________
525 : void
526 : AliFMDReconstructor::ProcessDigits(TClonesArray* digits,
527 : const AliFMDRawReader& rawRead) const
528 : {
529 : // For each digit, find the pseudo rapdity, azimuthal angle, and
530 : // number of corrected ADC counts, and pass it on to the algorithms
531 : // used.
532 : //
533 : // Parameters:
534 : // digits Array of digits
535 : //
536 0 : if (fZombie) {
537 0 : AliWarning("I'm a zombie - cannot do anything");
538 0 : return;
539 : }
540 0 : AliFMDAltroMapping* map = AliFMDParameters::Instance()->GetAltroMap();
541 0 : for (size_t i = 1; i <= 3; i++) {
542 0 : fZS[i-1] = rawRead.IsZeroSuppressed(map->Detector2DDL(i));
543 0 : fZSFactor[i-1] = rawRead.NoiseFactor(map->Detector2DDL(i));
544 : }
545 0 : UseRecoParam(kTRUE);
546 0 : ProcessDigits(digits);
547 0 : UseRecoParam(kFALSE);
548 0 : }
549 :
550 : //____________________________________________________________________
551 : void
552 : AliFMDReconstructor::ProcessDigits(TClonesArray* digits) const
553 : {
554 : // For each digit, find the pseudo rapdity, azimuthal angle, and
555 : // number of corrected ADC counts, and pass it on to the algorithms
556 : // used.
557 : //
558 : // Parameters:
559 : // digits Array of digits
560 : //
561 16 : Int_t nDigits = digits->GetEntries();
562 16 : AliFMDDebug(2, ("Got %d digits", nDigits));
563 8 : fESDObj->SetNoiseFactor(fNoiseFactor);
564 8 : fESDObj->SetAngleCorrected(fAngleCorrect);
565 8 : fBad.Reset(false);
566 819216 : for (Int_t i = 0; i < nDigits; i++) {
567 409600 : AliFMDDigit* digit = static_cast<AliFMDDigit*>(digits->At(i));
568 409600 : if (!digit) continue;
569 409600 : ProcessDigit(digit);
570 409600 : }
571 8 : }
572 :
573 : //____________________________________________________________________
574 : void
575 : AliFMDReconstructor::ProcessDigit(AliFMDDigit* digit) const
576 : {
577 : //
578 : // Process a single digit
579 : //
580 : // Parameters:
581 : // digit Digiti to process
582 : //
583 819200 : UShort_t det = digit->Detector();
584 409600 : Char_t rng = digit->Ring();
585 409600 : UShort_t sec = digit->Sector();
586 409600 : UShort_t str = digit->Strip();
587 409600 : Short_t adc = digit->Counts();
588 : // if (AliLog::GetDebugLevel("FMD","")>3) digit->Print();
589 409600 : ProcessSignal(det, rng, sec, str, adc);
590 409600 : }
591 :
592 : //____________________________________________________________________
593 : void
594 : AliFMDReconstructor::ProcessSignal(UShort_t det,
595 : Char_t rng,
596 : UShort_t sec,
597 : UShort_t str,
598 : Short_t adc) const
599 : {
600 : // Process the signal from a single strip
601 : //
602 : // Parameters:
603 : // det Detector ID
604 : // rng Ring ID
605 : // sec Sector ID
606 : // rng Strip ID
607 : // adc ADC counts
608 : //
609 819200 : Int_t dbg = AliLog::GetDebugLevel("FMD","");
610 409600 : Bool_t dhr = dbg > 3 && dbg < 10;
611 409600 : if (dhr) printf("FMD%d%c[%2d,%3d] adc=%4d ", det, rng, sec, str, adc);
612 :
613 409600 : if (adc >= AliFMDRawReader::kBadSignal) {
614 0 : AliFMDDebug(10, ("FMD%d%c[%2d,%3d] is marked bad", det, rng, sec, str));
615 0 : if (dhr) Printf("bad");
616 0 : fBad(det,rng,sec,str) = true;
617 0 : return;
618 : }
619 :
620 : // Check that the strip is not marked as dead
621 409600 : AliFMDParameters* param = AliFMDParameters::Instance();
622 409600 : if (param->IsDead(det, rng, sec, str)) {
623 0 : AliFMDDebug(10, ("FMD%d%c[%2d,%3d] is dead", det, rng, sec, str));
624 0 : if (dhr) Printf("dead");
625 0 : fBad(det,rng,sec,str) = true;
626 0 : return;
627 : }
628 :
629 : // digit->Print();
630 : // Get eta and phi
631 409600 : Float_t eta = fESDObj->Eta(det, rng, 0, str);
632 :
633 : // Substract pedestal.
634 409600 : UShort_t counts = SubtractPedestal(det, rng, sec, str, adc);
635 409600 : if(counts == USHRT_MAX) {
636 0 : if (dhr) Printf("invalid");
637 0 : return;
638 : }
639 409600 : if (dhr) printf("counts=%4d ", counts);
640 :
641 : // Gain match digits.
642 409600 : Double_t edep = Adc2Energy(det, rng, sec, str, eta, counts);
643 : // Get rid of nonsense energy
644 409600 : if(edep < 0) {
645 0 : if (dhr) Printf("zero");
646 0 : return;
647 : }
648 409600 : if (dhr) printf("edep=%f ", edep);
649 :
650 : // Make rough multiplicity
651 409600 : Double_t mult = Energy2Multiplicity(det, rng, sec, str, edep);
652 : // Get rid of nonsense mult
653 : //if (mult > 20) {
654 : // AliWarning(Form("The mutliplicity in FMD%d%c[%2d,%3d]=%f > 20 "
655 : // "(ADC: %d, Energy: %f)", det, rng, sec, str, mult,
656 : // counts, edep));
657 : // }
658 409600 : if (mult < 0) {
659 0 : if (dhr) Printf("not hit");
660 0 : return;
661 : }
662 :
663 409600 : if (dhr) Printf("mult=%f ", mult);
664 819200 : AliFMDDebug(10, ("FMD%d%c[%2d,%3d]: "
665 : "ADC: %d, Counts: %d, Energy: %f, Mult: %f",
666 : det, rng, sec, str, adc, counts, edep, mult));
667 :
668 : // Create a `RecPoint' on the output branch.
669 409600 : if (fMult) {
670 409600 : Float_t phi;
671 409600 : PhysicalCoordinates(det, rng, sec, str, eta, phi);
672 :
673 : AliFMDRecPoint* m =
674 819200 : new ((*fMult)[fNMult]) AliFMDRecPoint(det, rng, sec, str,
675 409600 : eta, phi, edep, mult);
676 : (void)m; // Suppress warnings about unused variables.
677 409600 : fNMult++;
678 409600 : }
679 :
680 409600 : fESDObj->SetMultiplicity(det, rng, sec, str, mult);
681 : // fESDObj->SetEta(det, rng, sec, str, eta);
682 :
683 409600 : if (fDiagAll) fDiagAll->Fill(adc, mult);
684 :
685 1228800 : }
686 :
687 : //____________________________________________________________________
688 : void
689 : AliFMDReconstructor::DigitizeSignal(TClonesArray* sdigits,
690 : UShort_t det,
691 : Char_t rng,
692 : UShort_t sec,
693 : UShort_t str,
694 : UShort_t /* sam */,
695 : Short_t adc) const
696 : {
697 : // Process the signal from a single strip
698 : //
699 : // Parameters:
700 : // det Detector ID
701 : // rng Ring ID
702 : // sec Sector ID
703 : // rng Strip ID
704 : // adc ADC counts
705 : //
706 0 : AliFMDParameters* param = AliFMDParameters::Instance();
707 : // Check that the strip is not marked as dead
708 0 : if (param->IsDead(det, rng, sec, str)) {
709 0 : AliFMDDebug(10, ("FMD%d%c[%2d,%3d] is dead", det, rng, sec, str));
710 0 : return;
711 : }
712 :
713 : // Substract pedestal.
714 0 : UShort_t counts = SubtractPedestal(det, rng, sec, str, adc);
715 0 : if(counts == USHRT_MAX || counts == 0) return;
716 :
717 : // Gain match digits.
718 0 : Double_t edep = Adc2Energy(det, rng, sec, str, counts);
719 : // Get rid of nonsense energy
720 0 : if(edep < 0) return;
721 :
722 0 : Int_t n = sdigits->GetEntriesFast();
723 : // AliFMDSDigit* sdigit =
724 0 : new ((*sdigits)[n])
725 0 : AliFMDSDigit(det, rng, sec, str, edep, counts, counts, counts, counts);
726 : // sdigit->SetCount(sam, counts);
727 0 : }
728 :
729 : //____________________________________________________________________
730 : UShort_t
731 : AliFMDReconstructor::SubtractPedestal(UShort_t det,
732 : Char_t rng,
733 : UShort_t sec,
734 : UShort_t str,
735 : UShort_t adc,
736 : Float_t noiseFactor,
737 : Bool_t zsEnabled,
738 : UShort_t zsNoiseFactor) const
739 : {
740 : //
741 : // Subtract the pedestal off the ADC counts.
742 : //
743 : // Parameters:
744 : // det Detector number
745 : // rng Ring identifier
746 : // sec Sector number
747 : // str Strip number
748 : // adc ADC counts
749 : // noiseFactor If pedestal substracted pedestal is less then
750 : // this times the noise, then consider this to be 0.
751 : // zsEnabled Whether zero-suppression is on.
752 : // zsNoiseFactor Noise factor used in on-line pedestal
753 : // subtraction.
754 : //
755 : // Return:
756 : // The pedestal subtracted ADC counts (possibly 0), or @c
757 : // USHRT_MAX in case of problems.
758 : //
759 409600 : AliFMDParameters* param = AliFMDParameters::Instance();
760 1228800 : Float_t ped = (zsEnabled ? 0 :
761 409600 : param->GetPedestal(det, rng, sec, str));
762 409600 : Float_t noise = param->GetPedestalWidth(det, rng, sec, str);
763 409600 : if (ped < 0 || noise < 0) {
764 0 : AliWarningClass(Form("Invalid pedestal (%f) or noise (%f) "
765 : "for FMD%d%c[%02d,%03d]",
766 : ped, noise, det, rng, sec, str));
767 0 : return USHRT_MAX;
768 : }
769 1228800 : AliDebugClass(10, Form("Subtracting pedestal for FMD%d%c[%2d,%3d]=%4d "
770 : "(%s w/factor %d, noise factor %f, "
771 : "pedestal %8.2f+/-%8.2f)",
772 : det, rng, sec, str, adc,
773 : (zsEnabled ? "zs'ed" : "straight"),
774 : zsNoiseFactor, noiseFactor, ped, noise));
775 :
776 1228800 : Int_t counts = adc + Int_t(zsEnabled ? zsNoiseFactor * noise : - ped);
777 409600 : counts = TMath::Max(Int_t(counts), 0);
778 : // Calculate the noise factor for suppressing remenants of the noise
779 : // peak. If we have done on-line zero suppression, we only check
780 : // for noise signals that are larger than the suppressed noise. If
781 : // the noise factor used on line is larger than the factor used
782 : // here, we do not do this check at all.
783 : //
784 : // For example:
785 : // Online factor | Read factor | Result
786 : // ---------------+--------------+-------------------------------
787 : // 2 | 3 | Check if signal > 1 * noise
788 : // 3 | 3 | Check if signal > 0
789 : // 3 | 2 | Check if signal > 0
790 : //
791 : // In this way, we make sure that we do not suppress away too much
792 : // data, and that the read-factor is the most stringent cut.
793 409600 : Float_t nf = zsNoiseFactor; // TMath::Max(0.F, noiseFactor - (zsEnabled ? zsNoiseFactor : 0));
794 738667 : if (counts <= noise * nf) counts = 0;
795 651199 : if (counts > 0) AliDebugClass(15, "Got a hit strip");
796 :
797 409600 : UShort_t ret = counts < 0 ? 0 : counts;
798 : return ret;
799 409600 : }
800 :
801 :
802 : //____________________________________________________________________
803 : UShort_t
804 : AliFMDReconstructor::SubtractPedestal(UShort_t det,
805 : Char_t rng,
806 : UShort_t sec,
807 : UShort_t str,
808 : Short_t adc) const
809 : {
810 : // Member function to subtract the pedestal from a digit
811 : //
812 : // Parameters:
813 : // det Detector ID
814 : // rng Ring ID
815 : // sec Sector ID
816 : // rng Strip ID
817 : // adc # of ADC counts
818 : // Return:
819 : // Pedestal subtracted signal or USHRT_MAX in case of problems
820 : //
821 1228800 : UShort_t counts = SubtractPedestal(det, rng, sec, str, adc,
822 409600 : fNoiseFactor, fZS[det-1],
823 409600 : fZSFactor[det-1]);
824 409600 : if (fDiagStep1) fDiagStep1->Fill(adc, counts);
825 :
826 409600 : return counts;
827 : }
828 :
829 : //____________________________________________________________________
830 : Float_t
831 : AliFMDReconstructor::Adc2Energy(UShort_t det,
832 : Char_t rng,
833 : UShort_t sec,
834 : UShort_t str,
835 : UShort_t count) const
836 : {
837 : // Converts number of ADC counts to energy deposited.
838 : // Note, that this member function can be overloaded by derived
839 : // classes to do strip-specific look-ups in databases or the like,
840 : // to find the proper gain for a strip.
841 : //
842 : // In the first simple version, we calculate the energy deposited as
843 : //
844 : // EnergyDeposited = cos(theta) * gain * count
845 : //
846 : // where
847 : //
848 : // Pre_amp_MIP_Range
849 : // gain = ----------------- * Energy_deposited_per_MIP
850 : // ADC_channel_size
851 : //
852 : // is constant and the same for all strips.
853 : //
854 : // For the production we use the conversion measured in the NBI lab.
855 : // The total conversion is then:
856 : //
857 : // gain = ADC / DAC
858 : //
859 : // EdepMip * count
860 : // => energy = ----------------
861 : // gain * DACPerADC
862 : //
863 : // Parameters:
864 : // det Detector ID
865 : // rng Ring ID
866 : // sec Sector ID
867 : // rng Strip ID
868 : // counts Number of ADC counts over pedestal
869 : // Return
870 : // The energy deposited in a single strip, or -1 in case of problems
871 : //
872 1148267 : if (count <= 0) return 0;
873 80533 : AliFMDParameters* param = AliFMDParameters::Instance();
874 80533 : Float_t gain = param->GetPulseGain(det, rng, sec, str);
875 : // 'Tagging' bad gains as bad energy
876 161066 : if (gain < 0) {
877 80533 : AliDebugF(10, "Invalid gain (%f) for FMD%d%c[%02d,%03d]",
878 : gain, det, rng, sec, str);
879 0 : return -1;
880 : }
881 241599 : AliDebugF(10, "Converting counts %d to energy (factor=%f, DAC2MIP=%f)",
882 : count, gain,param->GetDACPerMIP());
883 :
884 161066 : Double_t edep = ((count * param->GetEdepMip())
885 80533 : / (gain * param->GetDACPerMIP()));
886 80533 : return edep;
887 409600 : }
888 :
889 : //____________________________________________________________________
890 : Float_t
891 : AliFMDReconstructor::Adc2Energy(UShort_t det,
892 : Char_t rng,
893 : UShort_t sec,
894 : UShort_t str,
895 : Float_t eta,
896 : UShort_t count) const
897 : {
898 : // Converts number of ADC counts to energy deposited.
899 : // Note, that this member function can be overloaded by derived
900 : // classes to do strip-specific look-ups in databases or the like,
901 : // to find the proper gain for a strip.
902 : //
903 : // In the first simple version, we calculate the energy deposited as
904 : //
905 : // EnergyDeposited = cos(theta) * gain * count
906 : //
907 : // where
908 : //
909 : // Pre_amp_MIP_Range
910 : // gain = ----------------- * Energy_deposited_per_MIP
911 : // ADC_channel_size
912 : //
913 : // is constant and the same for all strips.
914 : //
915 : // For the production we use the conversion measured in the NBI lab.
916 : // The total conversion is then:
917 : //
918 : // gain = ADC / DAC
919 : //
920 : // EdepMip * count
921 : // => energy = ----------------
922 : // gain * DACPerADC
923 : //
924 : // Parameters:
925 : // det Detector ID
926 : // rng Ring ID
927 : // sec Sector ID
928 : // rng Strip ID
929 : // eta Psuedo-rapidity
930 : // counts Number of ADC counts over pedestal
931 : // Return
932 : // The energy deposited in a single strip, or -1 in case of problems
933 : //
934 819200 : Double_t edep = Adc2Energy(det, rng, sec, str, count);
935 :
936 409600 : if (fDiagStep2) fDiagStep2->Fill(count, edep);
937 409600 : if (fAngleCorrect) {
938 409600 : Double_t theta = 2 * TMath::ATan(TMath::Exp(-eta));
939 409600 : Double_t corr = TMath::Abs(TMath::Cos(theta));
940 409600 : Double_t cedep = corr * edep;
941 1228800 : AliDebugF(10, "correcting for path %f * %f = %f (eta=%f, theta=%f)",
942 : edep, corr, cedep, eta, theta);
943 409600 : if (fDiagStep3) fDiagStep3->Fill(edep, cedep);
944 : edep = cedep;
945 409600 : }
946 409600 : return edep;
947 0 : }
948 :
949 : //____________________________________________________________________
950 : Float_t
951 : AliFMDReconstructor::Energy2Multiplicity(UShort_t /*det*/,
952 : Char_t /*rng*/,
953 : UShort_t /*sec*/,
954 : UShort_t /*str*/,
955 : Float_t edep) const
956 : {
957 : // Converts an energy signal to number of particles.
958 : // Note, that this member function can be overloaded by derived
959 : // classes to do strip-specific look-ups in databases or the like,
960 : // to find the proper gain for a strip.
961 : //
962 : // In this simple version, we calculate the multiplicity as
963 : //
964 : // multiplicity = Energy_deposited / Energy_deposited_per_MIP
965 : //
966 : // where
967 : //
968 : // Energy_deposited_per_MIP = 1.664 * SI_density * SI_thickness
969 : //
970 : // is constant and the same for all strips
971 : //
972 : // Parameters:
973 : // det Detector ID
974 : // rng Ring ID
975 : // sec Sector ID
976 : // rng Strip ID
977 : // edep Energy deposited in a single strip
978 : // Return
979 : // The "bare" multiplicity corresponding to the energy deposited
980 819200 : AliFMDParameters* param = AliFMDParameters::Instance();
981 409600 : Double_t edepMIP = param->GetEdepMip();
982 409600 : Float_t mult = edep / edepMIP;
983 : #if 0
984 : if (edep > 0)
985 : AliFMDDebug(15, ("Translating energy %f to multiplicity via "
986 : "divider %f->%f", edep, edepMIP, mult));
987 : #endif
988 409600 : if (fDiagStep4) fDiagStep4->Fill(edep, mult);
989 409600 : return mult;
990 : }
991 :
992 : //____________________________________________________________________
993 : void
994 : AliFMDReconstructor::PhysicalCoordinates(UShort_t det,
995 : Char_t rng,
996 : UShort_t sec,
997 : UShort_t str,
998 : Float_t& eta,
999 : Float_t& phi) const
1000 : {
1001 : // Get the eta and phi of a digit
1002 : //
1003 : // Parameters:
1004 : // det Detector ID
1005 : // rng Ring ID
1006 : // sec Sector ID
1007 : // rng Strip ID
1008 : // eta On return, contains the psuedo-rapidity of the strip
1009 : // phi On return, contains the azimuthal angle of the strip
1010 : //
1011 851968 : AliFMDGeometry* geom = AliFMDGeometry::Instance();
1012 425984 : Double_t x, y, z, r, theta, deta, dphi;
1013 425984 : geom->Detector2XYZ(det, rng, sec, str, x, y, z);
1014 :
1015 : // Correct for vertex offset.
1016 425984 : z -= fCurrentVertex;
1017 425984 : AliFMDGeometry::XYZ2REtaPhiTheta(x, y, z, r, deta, dphi, theta);
1018 425984 : eta = deta;
1019 425984 : phi = dphi;
1020 425984 : }
1021 :
1022 : namespace {
1023 0 : class ESDPrinter : public AliESDFMD::ForOne
1024 : {
1025 : public:
1026 0 : ESDPrinter() {}
1027 : Bool_t operator()(UShort_t d, Char_t r, UShort_t s, UShort_t t,
1028 : Float_t m, Float_t e)
1029 : {
1030 0 : if (m > 0 && m != AliESDFMD::kInvalidMult)
1031 0 : printf(" FMD%d%c[%2d,%3d] = %6.3f / %6.3f\n", d, r, s, t, m, e);
1032 0 : return kTRUE;
1033 : }
1034 : };
1035 : }
1036 :
1037 :
1038 : //____________________________________________________________________
1039 : void
1040 : AliFMDReconstructor::FillESD(TTree* /* digitsTree */,
1041 : TTree* /* clusterTree */,
1042 : AliESDEvent* esd) const
1043 : {
1044 : // nothing to be done
1045 : // FIXME: The vertex may not be known when Reconstruct is executed,
1046 : // so we may have to move some of that member function here.
1047 24 : AliFMDDebug(2, ("Calling FillESD with two trees and one ESD"));
1048 8 : if (fZombie) {
1049 0 : AliWarning("I'm a zombie - cannot do anything");
1050 0 : return;
1051 : }
1052 : // fESDObj->Print();
1053 :
1054 : // Fix up ESD so that only truely dead channels get the kInvalidMult flag.
1055 8 : MarkDeadChannels(fESDObj);
1056 :
1057 8 : Double_t oldVz = fCurrentVertex;
1058 8 : GetVertex(esd);
1059 8 : if (fVertexType != kNoVertex) {
1060 16 : AliFMDDebug(2, ("Revertexing the ESD data to vz=%f (was %f)",
1061 : fCurrentVertex, oldVz));
1062 8 : AliFMDESDRevertexer revertexer;
1063 8 : revertexer.Revertex(fESDObj, fCurrentVertex);
1064 8 : }
1065 :
1066 24 : if (AliDebugLevel() > 10) {
1067 0 : ESDPrinter p;
1068 0 : fESDObj->ForEach(p);
1069 0 : }
1070 :
1071 8 : if (esd) {
1072 16 : AliFMDDebug(2, ("Writing FMD data to ESD tree"));
1073 8 : esd->SetFMDData(fESDObj);
1074 8 : }
1075 :
1076 16 : if (!fDiagnostics || !esd) return;
1077 : static bool first = true;
1078 : // This is most likely NOT the event number you'd like to use. It
1079 : // has nothing to do with the 'real' event number.
1080 : // - That's OK. We just use it for the name of the directory -
1081 : // nothing else. Christian
1082 0 : Int_t evno = esd->GetEventNumberInFile();
1083 0 : AliFMDDebug(3, ("Writing diagnostics histograms to FMD.Diag.root/%03d",evno));
1084 0 : TFile f("FMD.Diag.root", (first ? "RECREATE" : "UPDATE"));
1085 0 : first = false;
1086 0 : f.cd();
1087 0 : TDirectory* d = f.mkdir(Form("%03d", evno),
1088 0 : Form("Diagnostics histograms for event # %d", evno));
1089 0 : d->cd();
1090 0 : if (fDiagStep1) fDiagStep1->Write();
1091 0 : if (fDiagStep2) fDiagStep2->Write();
1092 0 : if (fDiagStep3) fDiagStep3->Write();
1093 0 : if (fDiagStep4) fDiagStep4->Write();
1094 0 : if (fDiagAll) fDiagAll->Write();
1095 0 : d->Write();
1096 0 : f.Write();
1097 0 : f.Close();
1098 :
1099 0 : if (fDiagStep1) fDiagStep1->Reset();
1100 0 : if (fDiagStep2) fDiagStep2->Reset();
1101 0 : if (fDiagStep3) fDiagStep3->Reset();
1102 0 : if (fDiagStep4) fDiagStep4->Reset();
1103 0 : if (fDiagAll) fDiagAll->Reset();
1104 8 : }
1105 :
1106 : //____________________________________________________________________
1107 : void
1108 : AliFMDReconstructor::FillESD(AliRawReader*, TTree* clusterTree,
1109 : AliESDEvent* esd) const
1110 : {
1111 : //
1112 : // Forwards to above member function
1113 : //
1114 0 : if (fZombie) {
1115 0 : AliWarning("I'm a zombie - cannot do anything");
1116 0 : return;
1117 : }
1118 : TTree* dummy = 0;
1119 0 : FillESD(dummy, clusterTree, esd);
1120 0 : }
1121 : //____________________________________________________________________
1122 : //
1123 : // EOF
1124 : //
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