Adds a simulated powder ring to the current ROI. The powder ring has a Gaussian profile of a specified sigma, and may by elliptical owing to detector non-orthogonality (tilt). The simulated powder ring is added directly to the current data array.
The following example shows such a ring being simulated:
Main menu: ENTER COMMAND [QUESTION]:ring X-DIRECTION PIXEL SIZE (MICRONS) (Range: 1.000000E-03 to 10000.00) [100.0000]: Y-DIRECTION PIXEL SIZE (MICRONS) (Range: 1.000000E-03 to 10000.00) [100.0000]: X-PIXEL COORDINATE OF BEAM CENTRE [64.00000]: Y-PIXEL COORDINATE OF BEAM CENTRE [64.00000]: SAMPLE TO DETECTOR DISTANCE (MILLIMETRES) (Range: .100000 to 1.000000E+05) [200.0000]: TILT PLANE ROTATION ANGLE (DEGREES) (Range: -180.0000 to 180.0000) [0.0]:30 DETECTOR TILT ANGLE (DEGREES) (Range: -180.0000 to 180.0000) [0.0]:5 OPENING ANGLE OF DIFFRACTION RING (DEGREES) (Range: 0.0 to 90.00000) [2.000000]: PEAK MAXIMUM INTENSITY [500.0000]: STANDARD DEVIATION WIDTH (X-PIXELS) OF RADIAL PROFILE (Range: 0.0 to 1.700000E+38) [2.000000]: Main menu: ENTER COMMAND [PLOT DATA]: