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1 | /************************************************************************** | |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
12 | * about the suitability of this software for any purpose. It is * | |
13 | * provided "as is" without express or implied warranty. * | |
14 | **************************************************************************/ | |
15 | ||
16 | // $Id$ | |
17 | ||
18 | #include "AliMUONDigitCalibrator.h" | |
19 | ||
20 | #include "AliLog.h" | |
21 | #include "AliMUONCalibrationData.h" | |
22 | #include "AliMUONConstants.h" | |
23 | #include "AliMUONData.h" | |
24 | #include "AliMUONDigit.h" | |
25 | #include "AliMUONVCalibParam.h" | |
26 | #include "TClonesArray.h" | |
27 | ||
28 | /// | |
29 | /// Class used to calibrate digits (either real or simulated ones). | |
30 | /// | |
31 | /// The calibration consists of subtracting the pedestal | |
32 | /// and multiplying by a gain, so that | |
33 | /// Signal = (ADC-pedestal)*gain | |
34 | /// | |
35 | /// Please note also that for the moment, if a digit lies on a dead channel | |
36 | /// we remove this digit from the list of digits. | |
37 | /// FIXME: this has to be revisited. By using the AliMUONDigit::fFlags we | |
38 | /// should in principle flag a digit as bad w/o removing it, but this | |
39 | /// then requires some changes in the cluster finder to deal with this extra | |
40 | /// information correctly (e.g. to set a quality for the cluster if it contains | |
41 | /// bad digits). | |
42 | /// | |
43 | ||
44 | ClassImp(AliMUONDigitCalibrator) | |
45 | ||
46 | //_____________________________________________________________________________ | |
47 | AliMUONDigitCalibrator::AliMUONDigitCalibrator(AliMUONData* muonData, | |
48 | AliMUONCalibrationData* calib) | |
49 | : TTask("AliMUONDigitCalibrator","Subtract pedestal from digit charge"), | |
50 | fData(muonData), | |
51 | fCalibrationData(calib) | |
52 | { | |
53 | // | |
54 | // ctor. This class need the muonData to get access to the digit, | |
55 | // and the calibrationData to get access to calibration parameters. | |
56 | // | |
57 | } | |
58 | ||
59 | //_____________________________________________________________________________ | |
60 | AliMUONDigitCalibrator::AliMUONDigitCalibrator(const AliMUONDigitCalibrator&) | |
61 | : TTask() | |
62 | { | |
63 | AliFatal("Implement me if needed"); | |
64 | } | |
65 | ||
66 | //_____________________________________________________________________________ | |
67 | AliMUONDigitCalibrator& | |
68 | AliMUONDigitCalibrator::operator=(const AliMUONDigitCalibrator&) | |
69 | { | |
70 | AliFatal("Implement me if needed"); | |
71 | return *this; | |
72 | } | |
73 | ||
74 | //_____________________________________________________________________________ | |
75 | AliMUONDigitCalibrator::~AliMUONDigitCalibrator() | |
76 | { | |
77 | // | |
78 | // empty dtor. | |
79 | // | |
80 | } | |
81 | ||
82 | //_____________________________________________________________________________ | |
83 | void | |
84 | AliMUONDigitCalibrator::Exec(Option_t*) | |
85 | { | |
86 | // | |
87 | // Main method. | |
88 | // We loop on tracking chambers (i.e. we do nothing for trigger) | |
89 | // and for each digit in that chamber, we calibrate it : | |
90 | // a) if the corresponding channel is known to be bad, we set the signal to 0 | |
91 | // (so that digit can be suppressed later on) | |
92 | // b) we then apply pedestal and gain corrections. | |
93 | ||
94 | for ( Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ++ch ) | |
95 | { | |
96 | TClonesArray* digitArray = fData->Digits(ch); | |
97 | Int_t nDigits = digitArray->GetEntriesFast(); | |
98 | for ( Int_t d = 0; d < nDigits; ++d ) | |
99 | { | |
100 | AliMUONDigit* digit = | |
101 | static_cast<AliMUONDigit*>(digitArray->UncheckedAt(d)); | |
102 | ||
103 | // Very first check is whether this channel is known to be bad, | |
104 | // in which case we set the signal to zero. | |
105 | AliMUONVCalibParam* dead = static_cast<AliMUONVCalibParam*> | |
106 | (fCalibrationData->DeadChannels(digit->DetElemId(),digit->ManuId())); | |
107 | if ( dead && dead->ValueAsInt(digit->ManuChannel()) ) | |
108 | { | |
109 | AliWarning(Form("Removing dead channel detElemId %d manuId %d " | |
110 | "manuChannel %d",digit->DetElemId(),digit->ManuId(), | |
111 | digit->ManuChannel())); | |
112 | digit->SetSignal(0); | |
113 | continue; | |
114 | } | |
115 | ||
116 | // If the channel is good, go on with the calibration itself. | |
117 | ||
118 | AliMUONVCalibParam* pedestal = static_cast<AliMUONVCalibParam*> | |
119 | (fCalibrationData->Pedestals(digit->DetElemId(),digit->ManuId())); | |
120 | ||
121 | AliMUONVCalibParam* gain = static_cast<AliMUONVCalibParam*> | |
122 | (fCalibrationData->Gains(digit->DetElemId(),digit->ManuId())); | |
123 | ||
124 | if (!pedestal) | |
125 | { | |
126 | AliFatal(Form("Got a null ped object for DE,manu=%d,%d", | |
127 | digit->DetElemId(),digit->ManuId())); | |
128 | ||
129 | } | |
130 | if (!gain) | |
131 | { | |
132 | AliFatal(Form("Got a null gain object for DE,manu=%d,%d", | |
133 | digit->DetElemId(),digit->ManuId())); | |
134 | } | |
135 | ||
136 | Int_t manuChannel = digit->ManuChannel(); | |
137 | Int_t adc = digit->Signal(); | |
138 | Float_t padc = adc-pedestal->ValueAsFloat(manuChannel,0); | |
139 | if ( padc < 3.0*pedestal->ValueAsFloat(manuChannel,1) ) | |
140 | { | |
141 | padc = 0.0; | |
142 | } | |
143 | Float_t charge = padc*gain->ValueAsFloat(manuChannel,0); | |
144 | Int_t signal = TMath::Nint(charge); | |
145 | digit->SetSignal(signal); | |
146 | Int_t saturation = gain->ValueAsInt(manuChannel,1); | |
147 | if ( signal >= saturation ) | |
148 | { | |
149 | digit->Saturated(kTRUE); | |
150 | } | |
151 | } | |
152 | } | |
153 | } |