| Geant4 Cross Reference |
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5 Geant4 - Nanobeam example
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7
8 README file
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10
11 CORRESPONDING AUTHO
12
13 S. Incerti (a, *) et al.
14 a. Centre d'Etudes Nucleaires de Bordeaux-Grad
15 (CENBG), IN2P3 / CNRS / Bordeaux 1 University,
16 * e-mail:incerti@cenbg.in2p3.fr
17
18 ---->1. INTRODUCTION.
19
20 The nanobeam example simulates the beam optics
21 on the AIFIRA electrostatic accelerator facili
22 Bordeaux-Gradignan, France. For more informati
23 please visit :
24 http://www.cenbg.in2p3.fr/
25
26 The code can be used to calculate :
27 1) intrinsic aberration coefficients of the na
28 2) beam image from a relasitic primary emittan
29 3) grid shadow images
30
31 Three quadrupole field models can be used :
32 - a simple square field model
33 - a 3D mesh field model computed from OPERA3D
34 - an analytical model based on Enge's model
35
36 ---->2. GEOMETRY SET-UP.
37
38 The full magnetic configuration of the nanobea
39 This configuration is made of a combination of
40 5 Oxford Microbeams Ltd. OM50 quadrupoles.
41
42 More details on the experimental setup and its
43 be found in the following papers:
44
45 - A DETAILED RAY-TRACING SIMULATION OF THE HIG
46 AIFIRA FACILITY
47 By F. Andersson, Ph. Barberet, S. Incerti, Ph.
48 Published in Nucl.Instrum.Meth.B266:1653-1658,
49
50 - MONTE CARLO SIMULATION OF THE CENBG MICROBEA
51 GEANT4 TOOLKIT
52 By S. Incerti, Q. Zhang, F. Andersson, Ph. Mor
53 M.J. Merchant, D.T. Nguyen, C. Habchi, T. Pout
54 Published in Nucl.Instrum.Meth.B260:20-27, 200
55
56 - GEANT4 SIMULATION OF THE NEW CENBG MICRO AND
57 By S. Incerti, C. Habchi, Ph. Moretto, J. Oliv
58 Published in Nucl.Instrum.Meth.B249:738-742, 2
59
60 - A COMPARISON OF RAY-TRACING SOFTWARE FOR THE
61 SYSTEMS
62 By S. Incerti et al.,
63 Published in Nucl.Instrum.Meth.B231:76-85, 200
64
65 ---->3 VISUALIZATION
66
67 Visualization has not been implemented.
68
69 ---->4. HOW TO RUN THE EXAMPLE
70
71 1) You must have compiled your Geant4 installa
72 CLHEP library which can handle matrix operatio
73
74 2) The code should be compiled cmake and run w
75
76 ./nanobeam
77
78 The macro file default.mac is read by default.
79
80 Several macro files are provided:
81
82 1) for the computation of intrinsic aberration
83 coef-square.mac : using square magnetic field
84 coef-map.mac : using 3D map magnetic field mod
85 coef-enge.mac : using Enge's analytical field
86
87 2) for the simulation of the beam image with a
88 image-square.mac : using square magnetic field
89 image-map.mac : using 3D map magnetic field mo
90 image-enge.mac : using Enge's analytical field
91
92 3) for the simulation of grid shadow images
93 grid-square.mac : using square magnetic field
94 grid-map.mac : using 3D map magnetic field mod
95 grid-enge.mac : using Enge's analytical field
96
97 These macros files are stored in the ./macros
98
99 To run macros which include *map* in their nam
100 into the directory in which you run ./nanobeam
101
102 The code can be run in MT mode, for high stati
103 Do not use MT for aberration coefficients calc
104 The switch to MT can be made in nanobeam.cc.
105
106 ---->5. PHYSICS
107
108 The example runs with protons with fluctuating
109 Standard electromagnetic processes are activat
110 Physics builder G4EmStandardPhysics), includin
111
112 ---->6. SIMULATION OUTPUT AND RESULT ANALYZIS
113
114 All results are stored in the nanobeam.root fi
115 ROOT macro file plot.C:
116 * be sure to have ROOT installed on your machi
117 * be sure to be in the directory where ROOT ou
118 * copy plot.C into this directory
119 * launch ROOT by typing root, then under your
120 to execute the macro file
121 * or type directly: root plot.X
122
123 This macro file shows :
124 - the beam profile along the nanobeam line (on
125 coefficients)
126 - the beam image (Y vs X) on target
127 - the beam emittance (THETA vs X) and (PHY vs
128 - the grid shadow image (option)
129
130 The output ntuples can be written as xml or cs
131
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133
134 Should you have any enquiry, please do not hes
135 incerti@cenbg.in2p3.fr