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a9e2aefa | 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 | **************************************************************************/ | |
2682e810 | 15 | |
88cb7938 | 16 | /* $Id$ */ |
a9e2aefa | 17 | |
d19b6003 | 18 | // ----------------------- |
19 | // Class AliMUONChamber | |
20 | // ----------------------- | |
21 | // MUON tracking chamber class | |
22 | // now only providing DisIntegration function | |
23 | ||
30178c30 | 24 | // --- ROOT includes --- |
25 | #include <TRandom.h> | |
26 | #include <TMath.h> | |
a713db22 | 27 | #include "AliRun.h" |
28 | ||
30178c30 | 29 | |
681d067b | 30 | // --- MUON includes --- |
a713db22 | 31 | #include "AliMUON.h" |
a9e2aefa | 32 | #include "AliMUONChamber.h" |
cbf9f933 | 33 | #include "AliMUONSegmentation.h" |
a713db22 | 34 | #include "AliMUONHit.h" |
8c343c7c | 35 | #include "AliLog.h" |
a9e2aefa | 36 | |
5398f946 | 37 | /// \cond CLASSIMP |
a9e2aefa | 38 | ClassImp(AliMUONChamber) |
5398f946 | 39 | /// \endcond |
a9e2aefa | 40 | |
5398f946 | 41 | //_______________________________________________________ |
30178c30 | 42 | AliMUONChamber::AliMUONChamber() |
43 | : TObject(), | |
44 | fId(0), | |
30178c30 | 45 | fCurrentCorrel(1), // to avoid mistakes if ChargeCorrelInit is not called |
30178c30 | 46 | fResponse(0), |
a713db22 | 47 | fMUON(0) |
d81db581 | 48 | { |
d19b6003 | 49 | /// Default constructor |
cbf9f933 | 50 | |
51 | AliDebug(1, Form("default (empty) ctor this = %p", this)); | |
d81db581 | 52 | } |
53 | ||
a713db22 | 54 | //_______________________________________________________ |
30178c30 | 55 | AliMUONChamber::AliMUONChamber(Int_t id) |
56 | : TObject(), | |
57 | fId(id), | |
30178c30 | 58 | fCurrentCorrel(1), // to avoid mistakes if ChargeCorrelInit is not called |
30178c30 | 59 | fResponse(0), |
a713db22 | 60 | fMUON(0) |
a9e2aefa | 61 | { |
d19b6003 | 62 | /// Standard constructor |
a713db22 | 63 | |
64 | // muon | |
65 | fMUON = (AliMUON*)gAlice->GetModule("MUON"); | |
66 | if (!fMUON) { | |
67 | AliFatal("MUON detector not defined."); | |
68 | return; | |
69 | } | |
002920d1 | 70 | |
cbf9f933 | 71 | AliDebug(1, Form("ctor this = %p", this) ); |
30178c30 | 72 | } |
73 | ||
a713db22 | 74 | //_______________________________________________________ |
a9e2aefa | 75 | AliMUONChamber::~AliMUONChamber() |
76 | { | |
d19b6003 | 77 | /// Destructor |
002920d1 | 78 | |
cbf9f933 | 79 | AliDebug(1, Form("dtor this = %p", this)); |
a9e2aefa | 80 | } |
81 | ||
a713db22 | 82 | //_____________________________________________________ |
d19b6003 | 83 | void AliMUONChamber::ChargeCorrelationInit() |
84 | { | |
85 | /// Initialisation of charge correlation for current hit | |
86 | /// the value is stored, and then used by Disintegration | |
953daa5a | 87 | |
88 | // exponential is here to avoid eventual problems in 0 | |
89 | // factor 2 because chargecorrel is q1/q2 and not q1/qtrue | |
16d57990 | 90 | fCurrentCorrel = TMath::Exp(gRandom->Gaus(0,fResponse->ChargeCorrel()/2)); |
681d067b | 91 | } |
92 | ||
a713db22 | 93 | //_______________________________________________________ |
94 | void AliMUONChamber::DisIntegration(AliMUONHit *hit, | |
95 | Int_t& nnew,Float_t newclust[6][500]) | |
96 | { | |
d19b6003 | 97 | /// Generates pad hits (simulated cluster) |
98 | /// using the segmentation and the response model | |
99 | ||
a713db22 | 100 | Float_t dx, dy; |
101 | ||
102 | Float_t xhit = hit->X(); | |
103 | Float_t yhit = hit->Y(); | |
104 | Float_t zhit = hit->Z(); | |
105 | Int_t id = hit->DetElemId(); | |
106 | Float_t eloss = hit->Eloss(); | |
a9e2aefa | 107 | |
a713db22 | 108 | // |
109 | // Width of the integration area | |
110 | // | |
111 | dx=fResponse->SigmaIntegration()*fResponse->ChargeSpreadX(); | |
112 | dy=fResponse->SigmaIntegration()*fResponse->ChargeSpreadY(); | |
113 | // | |
114 | // Get pulse height from energy loss | |
115 | Float_t qtot = fResponse->IntPH(eloss); | |
116 | // | |
117 | // Loop Over Pads | |
118 | ||
119 | Float_t qp; | |
120 | nnew=0; | |
121 | ||
122 | // Cathode plane loop | |
953daa5a | 123 | for (Int_t i = 1; i <= 2; i++) { |
a713db22 | 124 | Float_t qcath = qtot * (i==1? fCurrentCorrel : 1/fCurrentCorrel); |
cbf9f933 | 125 | |
a713db22 | 126 | AliMUONGeometrySegmentation* segmentation= |
c2a43efa | 127 | fMUON->GetSegmentation()->GetModuleSegmentationByDEId(id, i-1); |
a713db22 | 128 | |
129 | for (segmentation->FirstPad(id, xhit, yhit, zhit, dx, dy); | |
130 | segmentation->MorePads(id); | |
131 | segmentation->NextPad(id)) | |
132 | { | |
133 | qp=fResponse->IntXY(id, segmentation); | |
134 | qp=TMath::Abs(qp); | |
135 | // | |
136 | // | |
137 | if (qp > 1.e-4) | |
138 | { | |
139 | if (nnew >= 500) // Perform a bounds check on nnew since it is assumed | |
140 | // newclust only contains 500 elements. | |
141 | { | |
142 | AliError("Limit of 500 pad responses reached."); | |
143 | return; | |
144 | }; | |
145 | // | |
146 | // --- store signal information | |
147 | newclust[0][nnew]=qcath; // total charge | |
148 | newclust[1][nnew]=segmentation->Ix(); // ix-position of pad | |
149 | newclust[2][nnew]=segmentation->Iy(); // iy-position of pad | |
150 | newclust[3][nnew]=qp * qcath; // charge on pad | |
151 | newclust[4][nnew]=segmentation->ISector(); // sector id | |
152 | newclust[5][nnew]=(Float_t) i; // counter | |
153 | nnew++; | |
154 | ||
155 | } | |
156 | } // Pad loop | |
157 | } // Cathode plane loop | |
158 | } |