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Compact megajoule-class pulsed power supply for generating long-pulsed magnetic fields
Kazuki Matsui1, Tomoki Kanda1, Yoshihiko Ihara2
1Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
The Review of Scientific Instruments
|March 2, 2021
Summary
A new pulsed power supply using electric-double-layer-capacitors (EDLCs) generates long-duration pulsed magnetic fields. This compact and cost-effective system achieved a 24.3 T field lasting ~1 second.
Area of Science:
- Physics
- Electrical Engineering
- Materials Science
Background:
- Pulsed magnetic fields are crucial for various scientific and industrial applications.
- Existing systems often face limitations in pulse duration, cost, or size.
- Developing compact, long-pulse magnetic field generation is an ongoing challenge.
Purpose of the Study:
- To develop a compact and low-cost pulsed power supply for generating long-duration pulsed magnetic fields.
- To demonstrate the system's capability using electric-double-layer-capacitors (EDLCs).
- To investigate the characteristics of the generated pulsed magnetic fields.
Main Methods:
- Development of a pulsed power supply utilizing electric-double-layer-capacitors (EDLCs).
- Experimental demonstration using 10.7 F and 50 F EDLC capacitor banks.
- Generation of pulsed magnetic fields using a 27 mm wide-bore magnet.
- Theoretical calculations incorporating Joule heating to model field profiles.
Main Results:
- Successful generation of a pulsed magnetic field with a peak strength of 24.3 T and a pulse duration of approximately 1 second.
- Demonstration across three experimental setups using different EDLC capacitor bank configurations.
- Theoretical calculations accurately reproduced the experimental field profiles, including the effects of Joule heating.
Conclusions:
- The developed EDLC-based pulsed power supply is effective for generating long-duration, high-strength pulsed magnetic fields.
- The system offers a compact and potentially low-cost solution for pulsed magnetic field applications.
- Theoretical modeling provides a basis for optimizing future pulsed magnetic field generation systems.
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