Highly polarized very cold neutrons through a permanent magnet quadrupole

Kaoru Taketani, Kenji Mishima, Takashi Ino, Tamaki Yoshioka, Suguru Muto, Takahiro Morishima, Hirohiko M. Shimizu, Takayuki Oku, Junichi Suzuki, Takenao Shinohara, Kenji Sakai, Hiromi Sato, Katsuya Hirota, Yoshie Otake, Masaaki Kitaguchi, Masahiro Hino, Yoshichika Seki, Yoshihisa Iwashita, Masako Yamada, Masahiro IchikawaTakanori Sugimoto, Shinsuke Kawasaki, Sachio Komamiya, Yoshio Kamiya, Hidetoshi Otono, Satoru Yamashita, Peter Geltenbort

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We obtained highly polarized very cold neutrons through a quadrupole magnet with a large aperture. When neutrons go through a quadrupole magnet, parallel-spin neutrons are attracted to the magnet axis and anti-parallel-spin neutrons are repelled off the axis. Therefore, the neutrons through a sufficiently long quadrupole magnet have completely parallel-spin. At the downstream of the quadrupole magnet, we placed another quadrupole magnet to divide neutrons into two regions depending on their spin directions. We obtained the neutron polarization from the integrated count of the two regions and found it was 99.88±0.09 (stat.)±0.05 (syst.)%.

Original languageEnglish
Pages (from-to)2643-2645
Number of pages3
JournalPhysica B: Condensed Matter
Volume404
Issue number17
DOIs
Publication statusPublished - 2009 Sep 1
Externally publishedYes

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Keywords

  • Neutron polarizer
  • Polarized neutron
  • Quadrupole magnet

ASJC Scopus subject areas

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

Cite this

Taketani, K., Mishima, K., Ino, T., Yoshioka, T., Muto, S., Morishima, T., Shimizu, H. M., Oku, T., Suzuki, J., Shinohara, T., Sakai, K., Sato, H., Hirota, K., Otake, Y., Kitaguchi, M., Hino, M., Seki, Y., Iwashita, Y., Yamada, M., ... Geltenbort, P. (2009). Highly polarized very cold neutrons through a permanent magnet quadrupole. Physica B: Condensed Matter, 404(17), 2643-2645. https://doi.org/10.1016/j.physb.2009.06.045