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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 <TMath.h> | |
19 | #include <TRandom.h> | |
20 | ||
21 | #include "AliMUONResponseV0.h" | |
22 | #include "AliMUONGeometrySegmentation.h" | |
23 | ||
24 | ClassImp(AliMUONResponseV0) | |
25 | ||
26 | //__________________________________________________________________________ | |
27 | AliMUONResponseV0::AliMUONResponseV0() | |
28 | : AliMUONResponse() | |
29 | { | |
30 | // Default constructor | |
31 | ||
32 | fMathieson = new AliMUONMathieson(); | |
33 | fChargeCorrel = 0; | |
34 | } | |
35 | //__________________________________________________________________________ | |
36 | AliMUONResponseV0::~AliMUONResponseV0() | |
37 | { | |
38 | delete fMathieson; | |
39 | } | |
40 | //__________________________________________________________________________ | |
41 | void AliMUONResponseV0::SetSqrtKx3AndDeriveKx2Kx4(Float_t SqrtKx3) | |
42 | { | |
43 | // Set to "SqrtKx3" the Mathieson parameter K3 ("fSqrtKx3") | |
44 | // in the X direction, perpendicular to the wires, | |
45 | // and derive the Mathieson parameters K2 ("fKx2") and K4 ("fKx4") | |
46 | // in the same direction | |
47 | fMathieson->SetSqrtKx3AndDeriveKx2Kx4(SqrtKx3); | |
48 | } | |
49 | ||
50 | //__________________________________________________________________________ | |
51 | void AliMUONResponseV0::SetSqrtKy3AndDeriveKy2Ky4(Float_t SqrtKy3) | |
52 | { | |
53 | // Set to "SqrtKy3" the Mathieson parameter K3 ("fSqrtKy3") | |
54 | // in the Y direction, along the wires, | |
55 | // and derive the Mathieson parameters K2 ("fKy2") and K4 ("fKy4") | |
56 | // in the same direction | |
57 | fMathieson->SetSqrtKy3AndDeriveKy2Ky4(SqrtKy3); | |
58 | } | |
59 | //__________________________________________________________________________ | |
60 | Float_t AliMUONResponseV0::IntPH(Float_t eloss) | |
61 | { | |
62 | // Calculate charge from given ionization energy loss | |
63 | Int_t nel; | |
64 | nel= Int_t(eloss*1.e9/27.4); | |
65 | Float_t charge=0; | |
66 | if (nel == 0) nel=1; | |
67 | for (Int_t i=1;i<=nel;i++) { | |
68 | Float_t arg=0.; | |
69 | while(!arg) arg = gRandom->Rndm(); | |
70 | charge -= fChargeSlope*TMath::Log(arg); | |
71 | } | |
72 | return charge; | |
73 | } | |
74 | ||
75 | //------------------------------------------- | |
76 | Float_t AliMUONResponseV0::IntXY(Int_t idDE, AliMUONGeometrySegmentation* segmentation) | |
77 | { | |
78 | // Calculate charge on current pad according to Mathieson distribution | |
79 | ||
80 | return fMathieson->IntXY(idDE, segmentation); | |
81 | } | |
82 | //------------------------------------------- | |
83 | Int_t AliMUONResponseV0::DigitResponse(Int_t digit, AliMUONTransientDigit* /*where*/) | |
84 | { | |
85 | // add white noise and do zero-suppression and signal truncation | |
86 | // Float_t meanNoise = gRandom->Gaus(1, 0.2); | |
87 | // correct noise for slat chambers; | |
88 | // one more field to add to AliMUONResponseV0 to allow different noises ???? | |
89 | Float_t meanNoise = gRandom->Gaus(1., 0.2); | |
90 | Float_t noise = gRandom->Gaus(0., meanNoise); | |
91 | digit += TMath::Nint(noise); | |
92 | if ( digit <= ZeroSuppression()) digit = 0; | |
93 | // if ( digit > MaxAdc()) digit=MaxAdc(); | |
94 | if ( digit > Saturation()) digit=Saturation(); | |
95 | ||
96 | return digit; | |
97 | } | |
98 | ||
99 | ||
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106 |