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Electrical explosion process and amorphous structure of carbon fibers under high-density current pulse igniting intense electron-beam accelerator

Published online by Cambridge University Press:  17 July 2009

Limin Li ,
Lie Liu ,
Guoxin Cheng ,
Lei Chang ,
Hong Wan  and
Jianchun Wen
Limin Li*
Affiliation:
College of Photoelectric Science and Engineering, National University of Defense Technology, Changsha, People's Republic of China
Lie Liu
Affiliation:
College of Photoelectric Science and Engineering, National University of Defense Technology, Changsha, People's Republic of China
Guoxin Cheng
Affiliation:
College of Photoelectric Science and Engineering, National University of Defense Technology, Changsha, People's Republic of China
Lei Chang
Affiliation:
College of Photoelectric Science and Engineering, National University of Defense Technology, Changsha, People's Republic of China
Hong Wan
Affiliation:
Department of Material Engineering and Applied Chemistry, National University of Defense Technology, Changsha, People's Republic of China
Jianchun Wen
Affiliation:
College of Photoelectric Science and Engineering, National University of Defense Technology, Changsha, People's Republic of China
*
Address correspondence and reprint requests to: Limin Li, College of Photoelectric Science and Engineering, National University of Defense Technology, Changsha 410073, People's Republic of China. E-mail: [email protected]
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Abstract

The development of pulsed power technology, particularly for inductive energy storage, promotes the extensive discussions of electrical explosion process in high energy density. This paper presents the electrical-explosion behavior of carbon fibers subjected to about 20 kA, ~5 µs high-density current pulse igniting an intense electron beam accelerator. After electrical explosion, and surface rupture, submicron particles, fibrillar and strip-shaped structures were observed, experimentally supporting the microstructure model (skin-core heterogeneity) of carbon fiber. Interestingly, the start and turn-off of the current were followed by radiation pulses with different intensities. It was found that the radiation was focused on the explosion stage which was characterized by an oscillating current. The instabilities of plasma produced during the explosion process play an important role in the microstructure changes of carbon fibers and the radiation generation.

Keywords

Electrical explosionElectron beam acceleratorHigh energy densityPulse radiationSubmicron structure
Type
Research Article
Information
Laser and Particle Beams , Volume 27 , Issue 3 , September 2009 , pp. 511 - 520
Copyright
Copyright © Cambridge University Press 2009

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