Development of a compact on-beam SEOP neutron spin filter

Takashi Ino, Mitsutaka Nakamura, Takayuki Oku, Takenao Shinohara, Jun ichi Suzuki, Kenji Ohoyama, Haruhiro Hiraka

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


We have designed and demonstrated a prototype on-beam spin-exchange optical pumping (SEOP) 3He neutron spin filter (NSF). It is designed as the incident neutron polarizer for spallation neutron sources, where the installation space is limited due to thick radiation shielding. The size of the NSF is roughly 50 cm×50 cm×25 cm including the diode-laser optics with a frequency narrowing external cavity, and a cylindrical 3He cell as large as a diameter of 5 cm and a length of 10 cm can fit. A neutron beam test was performed at the NOP beamline of JRR-3 to see the performance of the NSF.

Original languageEnglish
Pages (from-to)2667-2669
Number of pages3
JournalPhysica B: Condensed Matter
Issue number17
Publication statusPublished - 2009 Sep 1


  • He polarization
  • Neutron spin filter
  • Polarized neutron
  • Spallation neutron source

ASJC Scopus subject areas

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


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