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Three-dimensional electromagnetic simulation of monolithic radial transmission lines for Z-pinch

Published online by Cambridge University Press:  13 October 2014

Chongyang Mao ,
Xiaobing Zou  and
Xinxin Wang
Chongyang Mao
Affiliation:
Department of Electrical Engineering, Tsinghua University, Beijing, China
Xiaobing Zou
Affiliation:
Department of Electrical Engineering, Tsinghua University, Beijing, China
Xinxin Wang*
Affiliation:
Department of Electrical Engineering, Tsinghua University, Beijing, China
*
Address correspondence and requests for reprints to: Xinxin Wang, Department of Electrical Engineering, Tsinghua University, Beijing, China. E-mail: [email protected]
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Abstract

The electromagnetic simulation of the monolithic radial transmission lines for future Z-pinch was performed. Focusing on the difference in the maximum transmitted power efficiency between the electromagnetic simulation and the circuit simulation, the monolithic radial transmission lines with different impedance profile (exponential, Gaussian, hyperbolic) were compared. The power efficiency for the exponential line is higher than that for the Gaussian lines and the hyperbolic line, which is similar to that from the circuit simulation. However, all the power efficiencies obtained with the electromagnetic simulation are about 15% lower than those obtained with the circuit simulation, indicating the existence of considerable non-TEM modes and a non-ignorable error in the circuit simulation based on the quasi-TEM mode approximation. In consideration of several monolithic radial transmission lines being stacked together and the flat electrodes required by the stacked lines, the hyperbolic line was compared with the exponential line with several wide radial slots cut on the flat electrodes. While the hyperbolic line has a little bit lower transmitted power efficiency than that of the exponential line, it is much easier in fabrication. For this reason, the hyperbolic line was recommended as the best choice.

Keywords

Non-uniform transmission lineMonolithic radial transmission line, Z-pinch
Type
Research Article
Information
Laser and Particle Beams , Volume 32 , Issue 4 , December 2014 , pp. 599 - 603
Copyright
Copyright © Cambridge University Press 2014 

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