|The CMC white beam slit assembly on 9-ID consists
of 3 separate Glidcop masks, which are modifications of the APS L5-83
design and can be positioned independently in terms of vertical,
yaw, and pitch motions. The first provides a fixed-size entrance
aperture of 2.3 x 2.3 mm^2, while the other 2 each include 2 tungsten
at right angles. Together they allow further reduction of the beam
to any user-required size.
Links: Assembly Diagram | Beamline Location