Abstract Numerical computation based on a zero-dimensional thin-plasma-shell model has been carried out to study the scaling of the maximum kinetic energy per unit length, the current amplitude and the compression ratio for the imploding Z-pinch liner driven by peaked current pulses. A dimensionless scaling constant of 0.9 with an error less than 10% is extracted at the optimal choice of the current and liner parameters. Deviation of the chosen experimental parameter from the optimal exerts a minor influence on the kinetic energy for wider-shaped and slower-decaying pulses, but the influence becomes significant for narrower-shaped and faster-decaying pulses. The computation is in reasonable agreement with experimental data from the Z, Saturn, Blackjack 5 and Qiangguang-I liners.
Received: 07 March 2003
Published: 06 July 2005
(Z-pinches, plasma focus, and other pinch devices)
(Hard X-ray sources)
Fund: Project supported by the National Natural Science Foundation of China (Grant No 10035020).
Cite this article:
Zeng Zheng-Zhong, Qiu Ai-Ci Numerical study of the scaling of the maximum kinetic energy per unit length for imploding Z-pinch liner 2004 Chin. Phys. 13 201