Superconducting Dipole Magnet for Strangeness Physics Program at J-PARC

Jung Keun Ahn, Sung Hyun Kim, Shin Hyung Kim, Kenichi Imai, Hiroyuki Sako, Seyong Choi, Toshiyuki Takahashi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


A large-acceptance superconducting dipole magnet is currently under construction for extensive strangeness nuclear physics programs at Japan Proton Accelerator Research Complex (J-PARC), Japan. The conduction-cooled superconducting magnet is composed of two circular coils with a radius of 500 mm, vertically 500 mm apart from each other. This Helmholtz-type magnet was designed to keep the field uniformity Br/By at the level of 1% over the inner region of 500 mm in diameter and 500 mm in height. Our main detector is a time projection chamber that uses parallel E and B fields. If there is a transverse component, drifting electrons would take helical paths due to the E × B effect. As a result, the field uniformity is crucial in the design of the magnet. The maximum field strength is 1.5 T. We report our design study and coil test results using a test cryochamber.

Original languageEnglish
Article number7378891
JournalIEEE Transactions on Applied Superconductivity
Issue number4
Publication statusPublished - 2016 Jun


  • Conduction cooling
  • Helmholtz-type
  • J-PARC
  • time projection chamber

ASJC Scopus subject areas

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


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