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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 | **************************************************************************/ | |
15 | ||
88cb7938 | 16 | /* $Id$ */ |
a9e2aefa | 17 | |
a9e2aefa | 18 | #include <TMath.h> |
19 | #include <TRandom.h> | |
20 | ||
30178c30 | 21 | #include "AliMUONResponseV0.h" |
a713db22 | 22 | #include "AliMUONGeometrySegmentation.h" |
8c343c7c | 23 | |
d5bfadcc | 24 | ClassImp(AliMUONResponseV0) |
25 | ||
30178c30 | 26 | //__________________________________________________________________________ |
27 | AliMUONResponseV0::AliMUONResponseV0() | |
a713db22 | 28 | : AliMUONResponse() |
30178c30 | 29 | { |
30 | // Default constructor | |
31 | ||
a713db22 | 32 | fMathieson = new AliMUONMathieson(); |
30178c30 | 33 | fChargeCorrel = 0; |
34 | } | |
a713db22 | 35 | //__________________________________________________________________________ |
36 | AliMUONResponseV0::~AliMUONResponseV0() | |
37 | { | |
38 | delete fMathieson; | |
39 | } | |
d5bfadcc | 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 | |
a713db22 | 47 | fMathieson->SetSqrtKx3AndDeriveKx2Kx4(SqrtKx3); |
d5bfadcc | 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 | |
a713db22 | 57 | fMathieson->SetSqrtKy3AndDeriveKy2Ky4(SqrtKy3); |
d5bfadcc | 58 | } |
a713db22 | 59 | //__________________________________________________________________________ |
a9e2aefa | 60 | Float_t AliMUONResponseV0::IntPH(Float_t eloss) |
61 | { | |
62 | // Calculate charge from given ionization energy loss | |
63 | Int_t nel; | |
4ac9d21e | 64 | nel= Int_t(eloss*1.e9/27.4); |
a9e2aefa | 65 | Float_t charge=0; |
66 | if (nel == 0) nel=1; | |
67 | for (Int_t i=1;i<=nel;i++) { | |
01997fa2 | 68 | Float_t arg=0.; |
69 | while(!arg) arg = gRandom->Rndm(); | |
70 | charge -= fChargeSlope*TMath::Log(arg); | |
a9e2aefa | 71 | } |
72 | return charge; | |
73 | } | |
a713db22 | 74 | |
a713db22 | 75 | //------------------------------------------- |
76 | Float_t AliMUONResponseV0::IntXY(Int_t idDE, AliMUONGeometrySegmentation* segmentation) | |
77 | { | |
78 | // Calculate charge on current pad according to Mathieson distribution | |
a9e2aefa | 79 | |
a713db22 | 80 | return fMathieson->IntXY(idDE, segmentation); |
81 | } | |
82 | //------------------------------------------- | |
f7b62f08 | 83 | Int_t AliMUONResponseV0::DigitResponse(Int_t digit, AliMUONTransientDigit* /*where*/) |
a9e2aefa | 84 | { |
85 | // add white noise and do zero-suppression and signal truncation | |
b64652f5 | 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 ???? | |
4ac9d21e | 89 | Float_t meanNoise = gRandom->Gaus(1., 0.2); |
90 | Float_t noise = gRandom->Gaus(0., meanNoise); | |
104b5ac2 | 91 | digit += TMath::Nint(noise); |
ddc10e24 | 92 | if ( digit <= ZeroSuppression()) digit = 0; |
4ac9d21e | 93 | // if ( digit > MaxAdc()) digit=MaxAdc(); |
94 | if ( digit > Saturation()) digit=Saturation(); | |
95 | ||
a9e2aefa | 96 | return digit; |
97 | } | |
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