Development of longitudinal-gradient magnet for time focusing of ultra-cold neutron with anisotropic inter-pole

Yasushi Arimoto, Yoshihisa Iwashita, Tamaki Yoshioka, Masaaki Kitaguchi, Sohei Imajo, Hirohiko M. Shimizu, Koichiro Asahi, Takashi Ino, Yoshio Kamiya, Kenji Mishima, Suguru Muto, Kenji Sakai, Tatsushi Shima, Kaoru Taketani, Satoru Yamashita, Akihiro Yoshimi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Ultra-cold neutron (UCN) is attractive for a search of the neutron electric dipole moment (nEDM). It is crucial to store UCNs with high density in a bottle for nEDM measurement apparatus. To increase the density, time focusing technique can be useful, where slow neutrons are accelerated and fast neutrons are decelerated by using magnetic potential. This device is called rebuncher. The rebuncher consists of a gradient magnet, RF coil, and neutron guide. The magnet generates a field gradient of 3.5 T/m (from 1 T to 0.2 T within 24 cm) in the longitudinal direction. By using anisotropic inter-poles, the magnet is compact and keeps the gradient uniform. The fabricated magnet showed good performance as designed.

Original languageEnglish
Article number6156745
JournalIEEE Transactions on Applied Superconductivity
Volume22
Issue number3
DOIs
Publication statusPublished - 2012

Keywords

  • Gradient magnet
  • rebuncher
  • time focusing
  • ultra-cold neutron

ASJC Scopus subject areas

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

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    Arimoto, Y., Iwashita, Y., Yoshioka, T., Kitaguchi, M., Imajo, S., Shimizu, H. M., Asahi, K., Ino, T., Kamiya, Y., Mishima, K., Muto, S., Sakai, K., Shima, T., Taketani, K., Yamashita, S., & Yoshimi, A. (2012). Development of longitudinal-gradient magnet for time focusing of ultra-cold neutron with anisotropic inter-pole. IEEE Transactions on Applied Superconductivity, 22(3), [6156745]. https://doi.org/10.1109/TASC.2012.2183569