Compact megajoule-class pulsed power supply for generating long-pulsed magnetic fields

Kazuki Matsui; Tomoki Kanda; Yoshihiko Ihara; Koichi Kindo; Yoshimitsu Kohama

doi:10.1063/5.0032895

Compact megajoule-class pulsed power supply for generating long-pulsed magnetic fields

Rev Sci Instrum. 2021 Feb 1;92(2):024711. doi: 10.1063/5.0032895.

Authors

Kazuki Matsui¹, Tomoki Kanda¹, Yoshihiko Ihara², Koichi Kindo¹, Yoshimitsu Kohama¹

Affiliations

¹ Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
² Department of Physics, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan.

PMID: 33648141
DOI: 10.1063/5.0032895

Abstract

A pulsed power supply with a compact and low-cost electric-double-layer-capacitor (EDLC) is developed for generating pulsed magnetic fields with a long pulse duration of a few seconds. The system is demonstrated in three experimental setups using a 10.7 F- or 50 F-EDLC capacitor bank. By using the 10.7 F-EDLC capacitor bank with a 27 mm wide-bore magnet, the pulsed magnetic field with a peak field strength of 24.3 T and a pulse duration of ∼1 s is generated. The field profiles are reproduced in the theoretical calculations taking Joule heating into account. The calculations are also used to discuss possible variations of the field profile for future investigations.