riCh: riCh Single Planar MIrror.
riCh: riCh Single Planar MIrror.CPDW: riCh Photon Detector Window
The Photon Detector Window has a rectangular box with horizontal dimension (along the x-axis) hdim and with a vertical dimension (along the y-axis) vdim. The orientation in space is describe by the assigned coordinate system. The origin is positioned on the surface, which is in contact with the radiator gas. imat points to the row in the table CDIM, where the properties of the dielectric material are stored.