A low energy tunable pulsed X-ray source based on the pseudospark electron beam

Document Type

Article

Publication Date

1-1-2007

Abstract

A low energy pulsed X-ray source with 17 J electrical input energy has been constructed based on the vacuum spark configuration triggered by the pseudospark electron beam. With such a low input electrical energy, the frequently studied X-ray emitting vacuum spark plasma is not obtained. Instead, this configuration gives rise to a point-like electron beam-target pulsed X-ray source at the tip of the anode. Emission of X-ray is observed during the pre-breakdown phase. The X-ray spectrum is dominated by the characteristic line emission of the anode material. The total X-ray energy emission from the source can be estimated by assuming it to be a monochromatic point source. It is found to have an X-ray production efficiency of 0.1%, giving an average X-ray dosage of 18 mGy per pulse. X-ray radiography of small biological sample is demonstrated to illustrate a potential application of the present X-ray source.

Keywords

Electron beam, Pseudospark, Pulsed X-ray source

Publication Title

Laser and Particle Beams

ISSN

0263-0346

Divisions

PHYSICS

Volume

25

Issue

3

Publisher

Cambridge University Press

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