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4c039060 | 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 | /* | |
17 | $Log$ | |
116cbefd | 18 | Revision 1.11 2001/07/27 17:09:36 morsch |
19 | Use local SetTrack, KeepTrack and SetHighWaterMark methods | |
20 | to delegate either to local stack or to stack owned by AliRun. | |
21 | (Piotr Skowronski, A.M.) | |
22 | ||
a99cf51f | 23 | Revision 1.10 2000/12/21 16:24:06 morsch |
24 | Coding convention clean-up | |
25 | ||
675e9664 | 26 | Revision 1.9 2000/11/30 07:12:50 alibrary |
27 | Introducing new Rndm and QA classes | |
28 | ||
65fb704d | 29 | Revision 1.8 2000/10/02 15:20:40 morsch |
30 | Direct reference to default input file removed. | |
31 | ||
3459d6b6 | 32 | Revision 1.7 2000/06/30 12:19:07 morsch |
33 | Type of fFileName changed to TString, fp has been !-ed. | |
34 | ||
bd1cece1 | 35 | Revision 1.6 2000/06/09 20:36:01 morsch |
36 | All coding rule violations except RS3 corrected | |
37 | ||
f87cfe57 | 38 | Revision 1.5 1999/11/03 17:43:20 fca |
39 | New version from G.Martinez & A.Morsch | |
40 | ||
886b6f73 | 41 | Revision 1.4 1999/09/29 09:24:14 fca |
42 | Introduction of the Copyright and cvs Log | |
43 | ||
4c039060 | 44 | */ |
45 | ||
675e9664 | 46 | // Read background particles from a boundary source |
47 | // Very specialized generator to simulate background from beam halo. | |
48 | // The input file is a text file specially prepared | |
49 | // for this purpose. | |
50 | // Author: andreas.morsch@cern.ch | |
51 | ||
116cbefd | 52 | #include <stdlib.h> |
c5970876 | 53 | |
1578254f | 54 | #include <TDatabasePDG.h> |
116cbefd | 55 | #include <TPDGCode.h> |
56 | ||
57 | #include "AliGenHalo.h" | |
58 | #include "AliRun.h" | |
f87cfe57 | 59 | |
fe4da5cc | 60 | ClassImp(AliGenHalo) |
61 | AliGenHalo::AliGenHalo() | |
62 | :AliGenerator(-1) | |
63 | { | |
f87cfe57 | 64 | // Constructor |
fe4da5cc | 65 | fName="Halo"; |
66 | fTitle="Halo from LHC Tunnel"; | |
fe4da5cc | 67 | // |
68 | // Read all particles | |
69 | fNpart=-1; | |
70 | fp=0; | |
71 | } | |
72 | ||
73 | AliGenHalo::AliGenHalo(Int_t npart) | |
74 | :AliGenerator(npart) | |
75 | { | |
f87cfe57 | 76 | // Constructor |
fe4da5cc | 77 | fName="Halo"; |
78 | fTitle="Halo from LHC Tunnel"; | |
fe4da5cc | 79 | // |
80 | // Read all particles | |
81 | fNpart=-1; | |
82 | fp=0; | |
83 | } | |
84 | ||
f87cfe57 | 85 | AliGenHalo::AliGenHalo(const AliGenHalo & Halo) |
86 | { | |
87 | // copy constructor | |
88 | } | |
89 | ||
90 | ||
fe4da5cc | 91 | //____________________________________________________________ |
92 | AliGenHalo::~AliGenHalo() | |
93 | { | |
f87cfe57 | 94 | // Destructor |
fe4da5cc | 95 | } |
96 | ||
97 | //____________________________________________________________ | |
98 | void AliGenHalo::Init() | |
f87cfe57 | 99 | { |
100 | // Initialisation | |
101 | } | |
fe4da5cc | 102 | |
103 | //____________________________________________________________ | |
104 | void AliGenHalo::Generate() | |
105 | { | |
f87cfe57 | 106 | // Generate from input file |
fe4da5cc | 107 | FILE *fp = fopen(fFileName,"r"); |
108 | if (fp) { | |
bd1cece1 | 109 | printf("\n File %s opened for reading ! \n ", (char*) &fFileName); |
fe4da5cc | 110 | } else { |
bd1cece1 | 111 | printf("\n Opening of file %s failed ! \n ", (char*) &fFileName); |
fe4da5cc | 112 | } |
113 | // | |
114 | // MARS particle codes | |
f87cfe57 | 115 | const Int_t kmars[12]={0,kProton,kNeutron,kPiPlus,kPiMinus,kKPlus,kKMinus, |
1578254f | 116 | kMuonPlus,kMuonMinus,kGamma,kElectron,kPositron}; |
fe4da5cc | 117 | |
118 | Float_t polar[3]= {0,0,0}; | |
119 | Float_t origin[3]; | |
120 | Float_t p[3], p0; | |
121 | Float_t ekin, wgt, tx, ty, tz, txy; | |
1578254f | 122 | Float_t amass; |
fe4da5cc | 123 | // |
1578254f | 124 | Int_t ipart, ncols, nt; |
fe4da5cc | 125 | |
126 | Int_t nread=0; | |
127 | origin[2]=2650; | |
128 | ||
129 | while(1) { | |
130 | ncols = fscanf(fp,"%i %f %f %f %f %f %f", | |
131 | &ipart, &ekin, &wgt, | |
132 | &origin[0], &origin[1], | |
133 | &tx, &ty); | |
134 | if (ncols < 0) break; | |
135 | nread++; | |
136 | if (fNpart !=-1 && nread > fNpart) break; | |
f87cfe57 | 137 | ipart = kmars[ipart]; |
1578254f | 138 | amass = TDatabasePDG::Instance()->GetParticle(ipart)->Mass(); |
fe4da5cc | 139 | p0=sqrt(ekin*ekin + 2.*amass); |
140 | ||
141 | txy=TMath::Sqrt(tx*tx+ty*ty); | |
142 | if (txy == 1.) { | |
143 | tz=0; | |
144 | } else { | |
145 | tz=-TMath::Sqrt(1.-txy); | |
146 | } | |
147 | p[0]=p0*tx; | |
148 | p[1]=p0*ty; | |
149 | p[2]=p0*tz; | |
150 | fParentWeight=wgt; | |
a99cf51f | 151 | SetTrack(fTrackIt,-1,ipart,p,origin,polar,0,kPNoProcess,nt,fParentWeight); |
152 | // SetTrack(fTrackIt,-1,ipart,p,origin,polar,0,"Halo+",nt,fParentWeight); | |
fe4da5cc | 153 | origin[2]=-origin[2]; |
154 | p[2]=-p[2]; | |
a99cf51f | 155 | SetTrack(fTrackIt,-1,ipart,p,origin,polar,0,kPNoProcess,nt,fParentWeight); |
156 | // SetTrack(fTrackIt,-1,ipart,p,origin,polar,0,"Halo-",nt,fParentWeight); | |
fe4da5cc | 157 | origin[2]=-origin[2]; |
158 | p[2]=-p[2]; | |
159 | } | |
160 | } | |
161 | ||
162 | ||
f87cfe57 | 163 | AliGenHalo& AliGenHalo::operator=(const AliGenHalo& rhs) |
164 | { | |
165 | // Assignment operator | |
166 | return *this; | |
167 | } | |
168 | ||
fe4da5cc | 169 | |
170 | ||
171 | ||
172 | ||
173 | ||
174 | ||
175 |