MCNP: Ctme Card Impacts on Results

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Ctme card is used to limit the running time of the mcnp input file, does it affect the telly result or not ?
 
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Yes.

In that whatever number of particles have been run when the time is exceeded is what is used in the tallies. If you have enough particles to get good stats, great! If not, then you get bad stats on that run.
 

Thread 'Geometry modeling of an X-ray Irradiator'

Hello, I am designing an X-ray irradiator with MCNP simulation. But I am still in confusion, whether my X-ray housing will be a box or a cylinder. If the box (macrobody identifier of MCNP) is required, I am trying to match the dimension as that of the cylinder, i,e, the height will be that of the cylinder height, and the other two dimensions will be that of the radius of the cylinder (surface 52 and 53). Can anybody please help me define the surfaces? Below is my attached text file. Forgot...
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