Development of modulating permanent magnet sextupole lens for focusing of pulsed cold neutrons

Masako Yamada, Yoshihisa Iwashita, Masahiro Ichikawa, Takanori Sugimoto, Hiromu Tongu, Hiroshi Fujisawa, Hirohiko M. Shimizu, Takashi Ino, Kenji Mishima, Kaoru Taketani, Tamaki Yoshioka, Suguru Muto, Takahiro Morishima, Takayuki Oku, Jun ichi Suzuki, Takenao Shinohara, Kenji Sakai, Hiromi Sato, Katsuya Hirota, Yoshie OtakeYoshichika Seki, Shinsuke Kawasaki, Sachio Komamiya, Yoshio Kamiya, Hidetoshi Otono, Satoru Yamashita, Peter Geltenbort

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Modulating permanent magnet sextupole lens (PMSx) for focusing pulsed cold neutrons is under development. The synchronized modulation of its field gradient suppresses the chromatic aberration which arises from the Time Of Flight method. The strength of the magnetic field, the torque, and the rise of temperature during its operation are studied on a fabricated prototype. Experiments on focusing pulsed very cold neutrons (VCN) at ILL (Institute of Laue Langevin, France) were carried out and VCN with around λ=40 Å were focused by the PMSx at a focal length of about 0.5 m. The experimental results are presented in conjunction with the principle of the neutron focusing and the modulating method of the focal strength of permanent magnet lens with the double ring structure.

Original languageEnglish
Pages (from-to)2646-2651
Number of pages6
JournalPhysica B: Condensed Matter
Volume404
Issue number17
DOIs
Publication statusPublished - 2009 Sep 1
Externally publishedYes

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Keywords

  • Focusing
  • Permanent magnet sextupole lens
  • Pulse
  • SANS
  • Very cold neutrons

ASJC Scopus subject areas

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

Cite this

Yamada, M., Iwashita, Y., Ichikawa, M., Sugimoto, T., Tongu, H., Fujisawa, H., Shimizu, H. M., Ino, T., Mishima, K., Taketani, K., Yoshioka, T., Muto, S., Morishima, T., Oku, T., Suzuki, J. I., Shinohara, T., Sakai, K., Sato, H., Hirota, K., ... Geltenbort, P. (2009). Development of modulating permanent magnet sextupole lens for focusing of pulsed cold neutrons. Physica B: Condensed Matter, 404(17), 2646-2651. https://doi.org/10.1016/j.physb.2009.06.132