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MGEANT --- A Generic Multi-Purpose Monte-Carlo Package
for Gamma-Ray Experiments
MGEANT is a CERNLIB/GEANT based generic
multi-purpose Monte-Carlo simulation package appropriate for gamma-ray
astronomy which allows the rapid prototyping of a wide variety of detector
systems. Instrument specific geometry and materials data can simply be
supplied via input files, and are independent of the main code. Also, the
user can select from a standard set of event generators and beam options
(implemented as plug-ins) which would be needed in an astrophysical or
instrument calibration context. The philosophy of this approach is to facilitate
the implementation of new software add-ons and changes in the instrumental
setup. This is especially useful for projects which involve a large group
of developers and collaborators. MGEANT has been successfully used to perform
background calculations and to generate the instrument responses for the
SPI. It is currently being used in the Advanced Compton
Telescope (ACT) mission concept study.
MGEANT Key Features
Interactive or Batch Version Spectrum Options Monoenergetic
Power-law with exponential cut-off
Cosmic ray spectrum at solar minimum
Cosmic ray spectrum at solar maximum
User defined spectrum
Beam Options Plane wave
Point source/Calibration source at finite distance
Astrophysical point source
Diffuse emission map
Homogeneous and isotropic emissivity within a defined volume
Illumination of a portion of the detector array with a plane wave (Resp. Generation Only)
A grid of pencil beams illuminating the detector array (Resp. Generation Only)
Hadronic Interaction Interfaces GCALOR
Improved Compton Interaction Physics Includes options to use the GLEPS or GLECS Compton and Rayleigh scattering packages for
improved treatment of these processes including treatment of polarization.
Input Geometry Options Euclid Format
Native MGEANT Format
Multiple FITS Output Options Includes options for monolithic SPI-type detectors or tracking Compton
telescope detectors (see FITS format description available below).
MGEANT Distribution (last update: 03/30/05)
This dsitribution includes Imakefile, source code, header files, and sample
input / output files) can be downloaded
as a gzip'ed tar archive. Note that certain components (the FITS
output option and DMAP beam option) of MGEANT make use of the
V3.1 Users Guide (old, a new manual is in preparation). Available in PDF
and PS format.
MGEANT FITS format description. Available in PDF
or PS format.