Photocathodes

Luxel Corporation produces photocathodes for high performance streak cameras, including the Kentech, AXIS Photonique, and Hadland Photonics instruments.

Our photocathodes are ultra-flat for precise time resolution, and extra fresh for generating the strongest signal possible. Photocathodes are built to the customer’s foil thickness specifications and are usually supplied on the customer’s support blanks. Lexan® is preferred as a substrate because it can be made very thin and ultra-flat for less attenuation, and Mylar can be employed if a thicker substrate is required. Luxel photocathodes are commonly produced of 100nm Lexan® coated with 25nm of aluminum for conduction, layered finally with gold, potassium bromide, potassium iodide, or cesium iodide, in a range of thickness from 50nm to 200nm, depending on the application and user preferences. Gold cathodes can be made without the aluminum coating on ultra-thin Lexan, or in some cases, as freestanding foils.

A new capability for Luxel is the manufacture of low-density cesium iodide photocathodes, which are supplied in a configuration of 6µm Mylar / 30nm-50nm aluminum / low-density opaque cesium iodide.

Exposure of all photocathodes to air is held to an absolute minimum during manufacture. Final products are shipped desiccated in argon.

Luxel also supplies accelerator grids or mesh plates of 750 lpi nickel.

To ensure compatibility with equipment, the user usually supplies the blanks, although Luxel can build Kentech-style blanks.
Quantity discounts for multiples of the same photocathode foil specification are available. In most cases, four can be purchased for the price of three.

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