|
|
|
|
|
MUlti-LAyered Shielding SImulation Software
(MULASSIS)
MULASSIS is a M-C simulation based tool for dose
and particle fluence analysis associated with the use of radiation shields. Users
can define the shielding and detector geometry as planar or spherical layers,
with the material in each layer defined by its density and elemental/isotopic
composition. Incident particles can be any Geant4 particles, these include
protons, neutrons, electrons, gammas, alphas and light ions. There is a wide
choice for their initial energy and angular distribution. In addition,
radiation spectra produced by SPENVIS can be inputted when the tool is used
within this system. Users can carry out fluence, total
Ionising/Non-Ionising Energy Loss (NIEL) dose and Pulse Height Spectrum (PHS)
analysis for any layer in the geometry. Fluence can be tallied into energy
distribution histograms as a function of particle type and particle angular
direction. NIEL analysis can be performed only for layers of silicon material
only, as the required NIEL coefficients are not available for other material
at the moment. The histograms are output in Comma Separated Values (CSV)
format so they can be easily input into other analysis and plotting tools. Users who have a local Geant4 installation can
compile the MULASSIS code and use the tool interactively on their local
system. The user can make full use of the Geant4 visualisation facilities for
the shielding geometry and the particle interaction tracks. MULASSIS has been integrated into the ESA
SPENVIS system, thus making it one of the tools SPENVIS users can choose for
their radiation analysis. MULASSIS and the Geant4 toolkit operate on a
separate PC/Linux server which is http linked to the SPENVIS server. The full
MULASSIS functionality is available via the SPENVIS user interface. In
addition the radiation environment as evaluated by other SPENVIS models can
be used as inputs for the MULASSIS simulation, thus making it very easy to
obtain the modified radiation spectra behind a specific shield defined by the
user. The main reference paper for MULASSIS is
published in IEEE Transactions on Nuclear Science Vol 49 No 6 (2002) P2788-2793. Further
information on MULASSIS, as well as the source code to be used with the
Geant4 Toolkit, can be found in the documents and gzip file listed below. 11-Febuary-2010: Version 1.21 released. 30-January-2009: Version 1.19 released. Fluence
tally for primary and ions added. 25-August-2006: Microsoft Window version of MULASSIS is
available now! 23-August-2006: Version 1.14 released. Details
in the History file. 27-October-2005: Version 1.10 released. Details
in the History file. 02-September-2005: Version 1.9 released. See
History file for details. 14-July-2005: Window version of MULASSIS is
available now! Thanks to Hugh Evans. It comes as two Windows installers, one
for the G4 data sets and one for the Mulassis executable. You can find zipped
versions at: 10-May-2005: Update to v1.5 binary release. 04-May-2005: version 1.5 released. See History
file for the change details. 23-Aug-2004: Version 1.3 released. See History
file for details. 17-June-2004: Version 1.2 released, pls refer to
the History file for details. Draft version of the software user's manual (SUM) is now
available. 02-Apr-2004: Version 1.1 released. Works with
Geant4 6.1 (tags geant4-V06-01-ref-00, plus event-V06-01-00). This version
accepts the new GPS commands. 02-Mar-2004: Version 1.0 released. Also released
is an executable package which dose not require the installation of Geant4.
It is build with the latest G4 tag (geant4-06-00-ref-02) with gcc 3.2.2 on a
RH 9.0 platform. 23-Sep-2003: Updated version available. Main
change is that the Binary Model is the default cascade module for GeV range
hadron interactions. 23-Sep-2003: Executable is available for
download for Linux system. It is intended for users who just want to run
MULASSIS, without going through the trouble of installing the Geant4 toolkit.
|
|
||||||||||||||||||
|
|
|
|
||||||||||||||||||
|
©�=[1]0 |