LUXEL CORPORATION
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Photocathodes for High Performance Streak Cameras 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 1000Å Lexan coated with 250Å of aluminum for conduction, layered finally with gold, potassium bromide, potassium iodide, or cesium iodide, in a range of thickness from 500Å to 2000Å, 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 6µm Mylar / 300Å-500Å aluminum / low-density opaque coating of cesium iodide configuration.
Exposure of all photocathodes to air is held to an absolute minimum during manufacture. Final products are shipped desiccated in dry nitrogen. 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. * Image Credit:
A. R. Samson, "Photocathodes: Their efficiency and stability," Nuclear Instrument and Methods in Physics Research, vol 222, pp 215-220 (1984). 02/13/2004 |
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