X-ray generating mechanism using electron field emission cathode

Abstract

An x-ray generating device includes a field emission cathode formed at least partially from a nanostructure (1110) containing material having an emitted electron current density of at least 4 A / cm2. High energy conversion efficiency and compact design (1100) are achieved due to easy focusing of cold cathode emitted electron between the cathode (1110) and the gate or anode (1130) and focusing the electron beams at different anode materials (1130), pulsed x-ray radiation with varying energy can be generated from a single device.

Description

[0001] Statement Regarding Federally Sponsored Research or Development Programs [0002] At least some aspects of this invention were made with Government support under a grant from the Office of Naval Research under Contract No. N00014-98-1-0597. The government has certain rights in this invention. Background of the invention [0003] In the following description, reference is made to certain structures and / or methods. However, citations below should not be taken as an admission that these structures and / or methods constitute prior art. Applicant expressly reserves the right to demonstrate that such structures and / or methods are not prior art with respect to the present invention. [0004] X-rays at about 10 -8 and 10 -12 The part of the electromagnetic spectrum between m. When bombarded by energetic electrons, atoms emit X-rays through two distinct processes. [0005] In the first process, high-speed electrons slow down as they pass through matter. If an individual el...

AI Technical Summary

Problems solved by technology

[0019] The use of diamond material as a field emitter also poses the problem that diamond produces a lower current density than is required

Therefore, even if the focal point is bombarded with a uniform electron beam, the resulting X-ray beam is still non-uniform

Images