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 journalArticlepeer-review

    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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