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Soft X-ray emissions from neon gas-puff Z-pinch powered by Qiang Guang-I accelerator

Published online by Cambridge University Press:  14 September 2009

B. Kuai ,
G. Wu ,
A. Qiu ,
L. Wang ,
P. Cong  and
X. Wang
B. Kuai
Affiliation:
Department of Electrical Engineering, Xi'an Jiaotong University, Xi'an, China Northwest Institute of Nuclear Technology, Xi'an, China
G. Wu
Affiliation:
Department of Engineering Physics, Tsinghua University, Beijing, China Northwest Institute of Nuclear Technology, Xi'an, China
A. Qiu*
Affiliation:
Department of Electrical Engineering, Xi'an Jiaotong University, Xi'an, China Northwest Institute of Nuclear Technology, Xi'an, China
L. Wang
Affiliation:
Northwest Institute of Nuclear Technology, Xi'an, China
P. Cong
Affiliation:
Northwest Institute of Nuclear Technology, Xi'an, China
X. Wang*
Affiliation:
Department of Electrical Engineering, Tsinghua University, Beijing, China
*
Address correspondence and reprint requests to: X. Wang, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China. E-mail: [email protected]. Or to A. Qiu, Northwest Institute of Nuclear Technology, Xi'an, China. E-mail: [email protected]
Address correspondence and reprint requests to: X. Wang, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China. E-mail: [email protected]. Or to A. Qiu, Northwest Institute of Nuclear Technology, Xi'an, China. E-mail: [email protected]
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Abstract

The X-ray emission, especially the K-shell emission, from a neon gas-puff Z-pinch powered by the Qiang Guang-I accelerator, about 1.5 MA in amplitude and 100 ns in rise time, were calculated based on the two-level model and measured with X-ray diodes and an eight-frame X-ray pinhole camera. The simulation results showed that the K-shell yield is highly sensitive to the peak current. The experimental results confirmed that the matching of the Z-pinch load (mass and initial radius) to the current is crucial for getting a higher X-ray yield. Being determined by the imploding time, the pinch current plays a more important role than the current amplitude in K-shell emission. It seems that the preferable imploding time is about 110 ns. The K-shell radiation power with double shells, as a whole, is higher than that using single neon shell. While an implosion of a light (32 µg/cm) and small (20 mm in diameter) neon shell evolves with rather twist and asymmetries, a heavier (41 µg/cm) and bigger (25 mm in diameter) neon shell implodes more symmetrically. The double neon shells, 30 mm and 30 µg/cm for the outer shell, and 15-mm and 10 µg/cm for the inner shell, create almost “perfect” implosions evidenced by the early-time plasma shells with little perturbation and late stagnated pinch liners with a good axial uniformity. It was found that the “Zippering” effect leads to an earlier K-shell emission in the cathode region than that in the anode region, which extends the pulse width of K-shell emission.

Keywords

Gas puff z-pinchPulse power generatorPulsed X-ray sourceZ-pinch
Type
Research Article
Information
Laser and Particle Beams , Volume 27 , Issue 4 , December 2009 , pp. 569 - 577
Copyright
Copyright © Cambridge University Press 2009

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