Accurate position control of active magnetic levitation using sphere-shaped HTS bulk for inertial nuclear fusion

Yoshihiro Ishigaki, Hiroshi Ueda, Koh Agatsuma, Atsushi Ishiyama

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We have been developing an active magnetic levitation system, which is composed of a field-cooled disk-shaped or sphere-shaped high-temperature superconducting bulks (HTS bulks) and vertically piled ring-shaped electromagnets without an iron core. We suppose that this active magnetic levitation system can be applied to inertial nuclear fusion. In inertial nuclear fusion, one of the most important issues is to achieve high-accuracy position control of the fusion fuel, which consists of deuterium and tritium in order to evenly illuminate the entire surface of the target. Therefore, active magnetic levitation is applied to the levitation and position control of a sphere-shaped superconducting capsule containing nuclear fusion fuel. In this study, we designed and constructed a three-coil position control system in order to achieve the stable levitation of the sphere-shaped HTS bulk with a diameter of 5 mm by using the numerical simulation based on the hybrid finite element and boundary element analysis. Then, we carried out the experiments on the position control and restoring force characteristics of the sphere-shaped HTS bulk in the constructed levitation system.

Original languageEnglish
Article number5067192
Pages (from-to)2133-2136
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume19
Issue number3
DOIs
Publication statusPublished - Jun 1 2009
Externally publishedYes

Keywords

  • Accurate position control
  • Active magnetic levitation
  • HTS bulk
  • Hybrid finite element and boundary element method
  • Inertial fusion

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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