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 **************************************************************************/
18 Revision 1.2 2000/06/15 07:58:48 morsch
19 Code from MUON-dev joined
21 Revision 1.1.2.1 2000/06/09 21:33:35 morsch
22 AliMUONResponse code from AliMUONSegResV0.cxx
26 #include "AliMUONResponseV0.h"
27 #include "AliSegmentation.h"
32 ClassImp(AliMUONResponseV0)
33 Float_t AliMUONResponseV0::IntPH(Float_t eloss)
35 // Calculate charge from given ionization energy loss
37 nel= Int_t(eloss*1.e9/32.);
40 for (Int_t i=1;i<=nel;i++) {
41 charge -= fChargeSlope*TMath::Log(gRandom->Rndm());
45 // -------------------------------------------
47 Float_t AliMUONResponseV0::IntXY(AliSegmentation * segmentation)
49 // Calculate charge on current pad according to Mathieson distribution
51 const Float_t kInversePitch = 1/fPitch;
53 // Integration limits defined by segmentation model
55 Float_t xi1, xi2, yi1, yi2;
56 segmentation->IntegrationLimits(xi1,xi2,yi1,yi2);
57 xi1=xi1*kInversePitch;
58 xi2=xi2*kInversePitch;
59 yi1=yi1*kInversePitch;
60 yi2=yi2*kInversePitch;
62 // The Mathieson function
63 Double_t ux1=fSqrtKx3*TMath::TanH(fKx2*xi1);
64 Double_t ux2=fSqrtKx3*TMath::TanH(fKx2*xi2);
66 Double_t uy1=fSqrtKy3*TMath::TanH(fKy2*yi1);
67 Double_t uy2=fSqrtKy3*TMath::TanH(fKy2*yi2);
70 return Float_t(4.*fKx4*(TMath::ATan(ux2)-TMath::ATan(ux1))*
71 fKy4*(TMath::ATan(uy2)-TMath::ATan(uy1)));
74 Int_t AliMUONResponseV0::DigitResponse(Int_t digit)
76 // add white noise and do zero-suppression and signal truncation
77 Float_t meanNoise = gRandom->Gaus(1, 0.2);
78 Float_t noise = gRandom->Gaus(0, meanNoise);
80 if ( digit <= ZeroSuppression()) digit = 0;
81 if ( digit > MaxAdc()) digit=MaxAdc();