Four Jaw UHV Aperture Aperture Size: continuously tunable +/- 10-millimeters Accuracy: 10% of any setting Blade Position Resolution: 10-microns Manual or step motor drive systems Electrical isolation of jaws (optional) Heat sink or active water cooling (optional) 6" all metal seal mount

The McPherson 4 Jaw aperture has four high quality slit blades, independently driven by a precision drives. Accuracy of blade positions is 10-microns with the micrometer drive. Used as beam shaping apertures, the 4 Jaw Aperture can be positioned to accurately occult the beam before or after optic elements. Motor controls allow scanning a precision aperture (moving a 40-um slit across the entire beam, for example). Placed before a monochromator the 4 Jaw Aperture can be used to scan the beam across gratings to evaluate resolution and stray light. It can be provided with fewer slit blades too, versions with 2 slit blades are popular immediately after a monochromator.

Cooled slit jaws for this design use wire braid and massive, or actively water-cooled heat sinks, to transfer heat. Directly water cooled masks or occulters can be integrated. Electrically isolated slit jaws with wiring and a feed through for bias and current monitoring (for beam position, etc.) are available. Augment your purchase with McPherson slit accessories such as view port adapters, phosphor coated visualization flags, and mounting platforms.