1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
21 #include "AliMUONResponseV0.h"
22 #include "AliSegmentation.h"
23 #include "AliMUONGeometrySegmentation.h"
25 ClassImp(AliMUONResponseV0)
27 //__________________________________________________________________________
28 AliMUONResponseV0::AliMUONResponseV0()
31 // Default constructor
33 fMathieson = new AliMUONMathieson();
36 //__________________________________________________________________________
37 AliMUONResponseV0::~AliMUONResponseV0()
41 //__________________________________________________________________________
42 void AliMUONResponseV0::SetSqrtKx3AndDeriveKx2Kx4(Float_t SqrtKx3)
44 // Set to "SqrtKx3" the Mathieson parameter K3 ("fSqrtKx3")
45 // in the X direction, perpendicular to the wires,
46 // and derive the Mathieson parameters K2 ("fKx2") and K4 ("fKx4")
47 // in the same direction
48 fMathieson->SetSqrtKx3AndDeriveKx2Kx4(SqrtKx3);
51 //__________________________________________________________________________
52 void AliMUONResponseV0::SetSqrtKy3AndDeriveKy2Ky4(Float_t SqrtKy3)
54 // Set to "SqrtKy3" the Mathieson parameter K3 ("fSqrtKy3")
55 // in the Y direction, along the wires,
56 // and derive the Mathieson parameters K2 ("fKy2") and K4 ("fKy4")
57 // in the same direction
58 fMathieson->SetSqrtKy3AndDeriveKy2Ky4(SqrtKy3);
60 //__________________________________________________________________________
61 Float_t AliMUONResponseV0::IntPH(Float_t eloss)
63 // Calculate charge from given ionization energy loss
65 nel= Int_t(eloss*1.e9/27.4);
68 for (Int_t i=1;i<=nel;i++) {
70 while(!arg) arg = gRandom->Rndm();
71 charge -= fChargeSlope*TMath::Log(arg);
75 //-------------------------------------------
76 Float_t AliMUONResponseV0::IntXY(AliSegmentation * segmentation)
78 // Calculate charge on current pad according to Mathieson distribution
80 return fMathieson->IntXY(segmentation);
83 //-------------------------------------------
84 Float_t AliMUONResponseV0::IntXY(Int_t idDE, AliMUONGeometrySegmentation* segmentation)
86 // Calculate charge on current pad according to Mathieson distribution
88 return fMathieson->IntXY(idDE, segmentation);
90 //-------------------------------------------
91 Int_t AliMUONResponseV0::DigitResponse(Int_t digit, AliMUONTransientDigit* /*where*/)
93 // add white noise and do zero-suppression and signal truncation
94 // Float_t meanNoise = gRandom->Gaus(1, 0.2);
95 // correct noise for slat chambers;
96 // one more field to add to AliMUONResponseV0 to allow different noises ????
97 Float_t meanNoise = gRandom->Gaus(1., 0.2);
98 Float_t noise = gRandom->Gaus(0., meanNoise);
99 digit += TMath::Nint(noise);
100 if ( digit <= ZeroSuppression()) digit = 0;
101 // if ( digit > MaxAdc()) digit=MaxAdc();
102 if ( digit > Saturation()) digit=Saturation();