Polarized pulsed front-end beam source for electron microscope

Details Polarized pulsed front-end beam source for electron microscope Polarized pulsed front-end beam source for electron microscope

2007-01-22

2009-08-11

Vanore, David A (Department: 2881)

Radiant energy

Radiant energy generation and sources

C250S306000, C250S307000, C250S310000, C250S311000, C250S400000, C313S542000, C313S544000

Reexamination Certificate

active

07573053

ABSTRACT:
A method and an electron source are provided for generating polarized electrons for an electron microscope. The electron source includes a photoemissive cathode and a low-power drive laser. The geometry of the photoemissive cathode uses a generally planar emission surface, which is imaged to approximately 1/100 its initial size via electrostatic focusing elements. The virtual emitter, or image spot, then is used as an electron source by a conventional microscope column.

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