MCNP Plugin

Access to this plugin requires an additional license and/or depends on your EDGE license. Contact the SpaceSuite team for more information.

The installation procedure is detailed in the Tools menu description.

MCNP Import

As any importer, the MCNP importer is available in the menu:File[Import] menu or inside the "Add new shape" dialog.

The importer tries to identify CSG shapes from the cell definition inside the provided MCNP file. The importer only imports elements related to the CAD definition: the cells block and surfaces block are imported and from the data block, only the materials (M) and the transformations (TR and TRCL) are interpreted.

Concerning the surfaces, the macro-bodies RHP/HEX, ARB and WED are not converted and the surfaces GQ, SQ, TX, TY, TZ, X, Y, Z are not interpreted.

Simple cell definitions are directly interpreted, otherwise a Boolean operation of the surfaces is created in EDGE. However, the following constructs are identified by the importer and the corresponding native GDML elements are created:

Cell content GDML shape

6 orthogonal planes

Box

Infinite cone + 1 plane

Cone Segment

Infinite tube + 2 planes

Tube Segment
Complement operations (like #1) are ignored by the importer: they mostly describe in GDML terms a parent/child relationship which is implicit inside the GDML.

MCNP Export

The MCNP plugin can also export the GDML definition to a MCNP file.

The following GDML shapes are exported to MCNP:

GDML shape Note

Box

Cone

Only if rmin1=rmin2=0

Ellipsoid

Only if ax=by

Orb

Sphere

Only if deltaphi=360° and deltatheta=180°

Tube

Intersection

Subtraction

Union

Moreover, the default Geant4 materials cannot be exported to MCNP and will be replaced by void material. Ensure to define properly your materials beforehand.