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Surface Creation and Visualization

 Surface Creation


The Visual Editor allows the user to create any surface recognized by MCNP. Surfaces can be created by typing in an exact position or by clicking on the position of the surface with the mouse, for the less complicated surfaces. When a surface is created in the Visual Editor it is immediately visible, even though it is not used in a cell. The user will then create cells by selecting the intersecting surfaces with the mouse. In this figure, surface 211 is displayed as a slanted surface infinite surface in the right plot. Also, the surface description is shown in the surface panel. The surface is a px surface with a transformation. Being able to immediately display surfaces that are created allows the user to verify the location of the surface before it is used in a cell. This can be particularly useful for surfaces with transformations.


Advanced surface creation features include the capability to enter the surface location in inches, and create a new surface as a delta entry from an existing surface. The user can use a surface that has already been created as a basis for a new surface. For example, the tank dome shown in the left plot consists of two concentric spheres. The user can first create the inner sphere. Then scan the inner sphere, by changing the mode to scan mode and selecting the surface with the mouse. Then the user can change to create mode and create the outer surface by entering a delta entry equal to the thickness of the dome.


Finally, the user has the option to display or hide surfaces. In the Visual Editor it is necessary sometimes to display a surface so that it can be accessed when creating the cell. When the surface is displayed, it appears as an infinite surface as shown for surface 211 in the figure.


This geometry is for a mixer pump inside of a waste tank. The pump model was created using the visual editor.