Geometry modeling of an X-ray Irradiator

[Hamidul]

TL;DR

This thread is about question of geometry of 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 about the material card and all of the data card. Right now, I am only doing the geometry section. If possible, please suggest to me how to improve my data card, too.

 

[Hamidul]

Here is the code.

 

[gleem]

Do you want to use the results of a square cross-section irradiator silmulation to use to build a cylindrical one?

 

[Hamidul]

Do you want to use the results of a square cross-section irradiator silmulation to use to build a cylindrical one?

Yes. please.

 

[gleem]

Could you provide a diagram or sketch of the device you envision?

 

[DEvens]

My personal bias is not to use rpp or rcc. I prefer to use simple planes and cylinders. That's mostly because of what I have wanted to do with calculations later. For example, when I model a fuel bundle, I often want to use the end surface of the fuel pins for other purposes. It is then not convenient to have the fuel pins defined by macro bodies. So I model the pin exteriors as two flat surfaces and a cylinder.

Whether your system is a rectangular box or a cylinder will depend on things outside of MCNP. Indeed, there are other possible shapes such as a segment of a cone.

Where does it need to fit? How is it attached to other equipment? These could indicate either box or cylinder.

Is it presurized and so a cylinder is preferable? Is it easier to manufacture from a pipe and so also a cylinder? Or manufactured from plates so must be a box?

Are the internal parts round or rectangular? Or could they be either? A round detector might want a round housing to fit in.

And so on, for many questions that can only be answered by discussions with the people who will build and install it.