NDLI: Paraxial gas-cell focusing of relativistic electron beams for radiography

Content Provider	IEEE Xplore Digital Library
Author	Oliver, B.V. Short, D. Cooper, G. McLean, J. O'Malley, J.
Copyright Year	1973
Abstract	A description of the underlying physics governing the operation of pulsed-power driven, gas-filled, paraxial diodes is presented. Gas-filled focusing cells are routinely used to transport high energy density electron beams for use in flash X-ray radiography experiments. The paraxial diode acts as a 1/4 betatron focusing element with a focal length F proportional to the square root of the beam energy and inversely proportional to the square root of the net current in the gas cell F/spl prop/(/spl gamma//I/sub net/)/sup 1/2/. Particle-in-cell simulations demonstrate that the time integrated radiation spot is determined both by focal sweeping due to time varying net currents and by finite beam emittance. The calculated radiation focal plane, spot, and dose are compared to data obtained by the Atomic Weapons Establishment, U.K., from a variety of experimental configurations and demonstrate good agreement between simulation and experiment. Suggestions to improve the focal properties of the diode are presented.
Sponsorship	IEEE Nuclear and Plasma Sciences Society
Starting Page	704
Ending Page	711
Page Count	8
File Size	606884
File Format	PDF
ISSN	00933813
Volume Number	33
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-04-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electron beams Radiography Diodes Weapons Atomic measurements Cathodes Voltage Physics Particle beams Geometrical optics X-ray radiography Beam-plasma propagation betatron focusing paraxial e-beams pulsed power
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Condensed Matter Physics

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