The Detector Azimuth and Detector 2Theta options are only used in Wide Angle model. We assume that the detector is mounted on a 2theta arm which has been rotated away from the primary beam. The Detector Azimuth establishes the direction that the 2theta arm has been rotated; an azimuth of zero corresponds to a rotation in the horizontal plane (common to laboratory tabletop units) and an azimuth of 90 corresponds to a rotation in the vertical plan (often used in synchrotron diffraction. systems). Detector 2Theta is the amount by which the detector has been rotated away from the beam center. |