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Detector Setup: Orthographic Projection

For Orthographic Projection, the rays emanating from each of the pixels in the detector grid and passing through the plasma are parallel. A schematic illustration of the Orthographic Projection viewing model for a rectangular detector is shown below.

When specifying Orthographic Projection, the center of the detector points to the Center of Projection. Rays are drawn parallel to a vector drawn between the user-input Detector and Center of Projection points.

Backlighter effects can also be included when using Orthographic Projection. In this case, the position of the backlighter is located at the position defined by the Center of Projection, and the backlighter has an extended size that is equal to the size of the detector.

The radiation flux at a given point on the detector depends on the solid angle to the plasma (as viewed from the detector) and the solid angle to the backlighter. The blue and red lines in the figure indicate the solid angles to the plasma and backlighter, respectively.

 

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