PHOTOCATHODE DESIGNS AND METHODS OF GENERATING AN ELECTRON BEAM USING A PHOTOCATHODE
First Claim
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1. A photocathode comprising:
- a body fabricated of a wide bandgap semiconductor material, wherein the body has a first surface and a second surface opposite the first surface, and wherein the body has a thickness between the first surface and the second surface of less than 100 nm;
a metal layer disposed on the first surface; and
an alkali halide photocathode emitter disposed on the second surface, wherein the alkali halide photocathode has a thickness less than 10 nm.
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Abstract
A photocathode can include a body fabricated of a wide bandgap semiconductor material, a metal layer, and an alkali halide photocathode emitter. The body may have a thickness of less than 100 nm and the alkali halide photocathode may have a thickness less than 10 nm. The photocathode can be illuminated with a dual wavelength scheme.
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Citations
20 Claims
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1. A photocathode comprising:
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a body fabricated of a wide bandgap semiconductor material, wherein the body has a first surface and a second surface opposite the first surface, and wherein the body has a thickness between the first surface and the second surface of less than 100 nm; a metal layer disposed on the first surface; and an alkali halide photocathode emitter disposed on the second surface, wherein the alkali halide photocathode has a thickness less than 10 nm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method comprising:
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illuminating a photocathode with a photon beam having a dual wavelength scheme, wherein the photocathode includes an alkali halide photocathode disposed on a body; and generating an electron beam as the photocathode is illuminated with the photon beam. - View Dependent Claims (17, 18, 19, 20)
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Specification