WEP075 　電磁石と電源　 8月8日 大展示ホール 13:10 - 15:10

加速器用磁気アシストとMOS-gateサイリスタを用いた電源の開発

Marx Generator Based on MOS-gated switches With Magnetic Assist for Accelerator Applications

○ペレズ フアン，須貝 太一（長岡技術科学大学），徳地 明（株式会社パルスパワー技術研究所），江 偉華（長岡技術科学大学）

○Juan Perez, Taichi Sugai (Nagaoka University of Technology), Akira Tokuchi (Pulsed Power Japan Laboratory Ltd.), Weihua Jiang (Nagaoka University of Technology)

At the Extreme Energy-Density Research Institute in the Nagaoka University of Technology. In recent times semiconductor switches have been considered as possible replacements due to their ease of maintenance and control. In general, it is difficult to achieve the same ratings of a gas switch with a single semiconductor device, so connecting many in series, parallel or a different scheme is often applied. We propose a study to evaluate a Marx topology using MOS-GATED thyristors capable of high current output. The attractive factors of these semiconductors are the low gate current required for turning on and a low resistance during the ON state [1], a four-stage prototype was built, and it achieved a peak output of 1kV and 1kA with a 2μs pulse width. To improve the output voltage and current a ferrite core was implemented as a magnetic switch on every stage, this method has been used before to improve the efficiency of thyristors. However, not combined with circuit topologies like a Marx generator. Adding these magnetic switches increased the efficiency to 89 %( from 70%) and allowed an output of 2.2kV and 2.2 kA without changing the shape of the pulse or the rise time.