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

Published online by Cambridge University Press:  20 July 2007

C.S. Wong ,
H.J. Woo  and
S.L. Yap
C.S. Wong
Affiliation:
Plasma Research Laboratory, Physics Department, University of Malaya, Kuala Lumpur, Malaysia
H.J. Woo
Affiliation:
Faculty of Engineering and Science, University Tunku Abdul Rahman, Kuala Lumpur, Malaysia
S.L. Yap
Affiliation:
Plasma Research Laboratory, Physics Department, University of Malaya, Kuala Lumpur, Malaysia
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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 beamPseudosparkPulsed X-ray source
Type
Research Article
Information
Laser and Particle Beams , Volume 25 , Issue 3 , September 2007 , pp. 497 - 502
Copyright
© 2007 Cambridge University Press

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