PENELOPE 2003 - OECD Nuclear Energy Agency

5.7. A short tutorial 173
MODULE ( )
1111111111111111111111111111111111111111111111111111111111111111
OMEGA=(+0.000000000000000E+00, 0) DEG (DEFAULT=0.0)
THETA=(+0.000000000000000E+00, 0) DEG (DEFAULT=0.0)
PHI=(+0.000000000000000E+00, 0) RAD (DEFAULT=0.0)
X-SHIFT=(+0.000000000000000E+00, 0) (DEFAULT=0.0)
Y-SHIFT=(+0.000000000000000E+00, 0) (DEFAULT=0.0)
Z-SHIFT=(+0.000000000000000E+00, 0) (DEFAULT=0.0)
0000000000000000000000000000000000000000000000000000000000000000
INCLUDE
FILE= (filename.ext)
0000000000000000000000000000000000000000000000000000000000000000
Then, to generate a new element, we just duplicate the corresponding data set, modify
the parameter values and eliminate the lines that are unnecessary (i.e. those of parameters
that take their default values). Of course, the defining data set must be placed
before the end-line. The progressing geometry can be visualized with gview2d as
soon as the first complete body has been defined. If gview2d stops before entering
the graphics mode, the geometry definition is incorrect and we should have a look at
the GEOMETRY.REP file to identify the problem. Normally, the conflicting parameter or
element appears in the last line of this file.
The basic elements of the geometry definition are quadric surfaces. These can be
visualized by using the following simple file, which defines the inner volume of a reduced
quadric as a single body,
----------------------------------------------------------------
Visualization of reduced quadric surfaces.
Define the desired quadric (surface 1) by entering its indices.
The region with side pointer -1 (inside the quadric) corresponds
to MATERIAL=1.
0000000000000000000000000000000000000000000000000000000000000000
SURFACE ( 1) Reduced quadric. One sheet hyperboloid.
INDICES=( 1, 1,-1, 0,-1)
0000000000000000000000000000000000000000000000000000000000000000
BODY ( 1) The interior of the quadric.
MATERIAL( 1)
SURFACE ( 1), SIDE POINTER=(-1)
0000000000000000000000000000000000000000000000000000000000000000
END 0000000000000000000000000000000000000000000000000000000
Notice that, in this case, the body is infinite in extent. There is no objection to using
infinite bodies, as long as the enclosure contains all material bodies. When only a single
body is defined, pengeom identifies it as the enclosure, and this requirement is met.
Otherwise, we must define a proper enclosure (since all bodies and modules must have
a common ancestor).
The following example describes a sphere with an inner arrow (fig. 5.2):
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Sphere of 5 cm radius with an arrow.
0000000000000000000000000000000000000000000000000000000000000000
SURFACE ( 1) PLANE Z=4.25
INDICES=( 0, 0, 0, 1,-1)