MCNP planar source (rectangular)

by damyoro
Tags: mcnp, planar, rectangular, source
damyoro is offline
Nov20-13, 05:51 AM
P: 12
Hello to everybody,

I need some explanation on how to use SDEF variables to define correctly a planar rectangular source. Let say this source is emitting in all direction but I am interested in a side of the source surface where a point detector is located. I used in my example VEC (VEC =001) but not DIR.
How to take into account the fact that in analog simulation the source is emitting equally to the opposite surface plane.
I would like also to understand the cosine distribution mentioned in the primer for a surface source where it is written p(μ) = 2μ for μ [0,1]. That is means that p(μ) can the value 2 when μ=1. Is it not a probability? Which is supposed to be less than 1.
Here is my example:
SDEF SUR= 51 POS 0 0 0 X=0 Y=d1 Z=d2 PAR=2 ERG 1.25 VEC 1 0 0 $ Plane rectangular source
SI1 -45 45
SP1 0 1
SI2 -70 70

Thank you in advance
Phys.Org News Partner Physics news on
Physicists design quantum switches which can be activated by single photons
'Dressed' laser aimed at clouds may be key to inducing rain, lightning
Higher-order nonlinear optical processes observed using the SACLA X-ray free-electron laser

Register to reply

Related Discussions
mcnp error "the new source has overrun the old source" Nuclear Engineering 1
ssr/ssw cards in mcnp Nuclear Engineering 0
MCNP Simulation Nuclear Engineering 0
mcnp library Nuclear Engineering 1
feynman diagrams: Planar Vs Non-Planar topologies High Energy, Nuclear, Particle Physics 2