MCNP volumetric source definition

Thread starter Lujain
Start date Mar 24, 2017
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Definition Mcnp Source

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To define a cubic volumetric source in MCNP code, utilize the SDEF card with x, y, and z parameters. For a parallelepiped centered at (0, 0, 0) with dimensions of 40 cm, 10 cm, and 4 cm, specify the source definition using SI and SP cards to set the limits for each dimension. The example provided includes SI1, SI2, and SI3 for the x, y, and z coordinates, respectively, along with corresponding SP values. This method allows for precise control over the source geometry within the simulation. Proper implementation of these parameters is crucial for accurate modeling in MCNP.

Mar 24, 2017

Lujain

I am now in the process to define a cubic volumetric source in mcnp code, does anyone have a clear explanation for that.

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Apr 24, 2017

PSRB191921

Hi,
Use x, y, z parameters in SDEF. For example for a parallepiped centered in (0, 0, 0) with a dimension (40 cm, 10 cm, 4 cm) :
SDEF X=d1 Y=d2 Z=d3 ...
SI1 -20 20
SP1 0 1
SI2 -5 5
SP2 0 1
SI3 -2 2
SP3 0 1
PSR

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