Info: GEM Geometry File

From SIMION

A SIMION geometry file (GEM) defines electrode geometries using constructive solid geometry (CSG) primitives. CSG operations define shapes using unions and intersections of other basic shapes (e.g. a rectangular slab with a cylinder hole cut through it), a bit similar in concept to machining. GEM files are text files and have the file name extension of ".GEM". SIMION can convert a GEM file to a PA file.