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Online ISSN : 1884-636X
Print ISSN : 1349-046X
ISSN-L : 1349-046X
受賞記事
オンビームSpin Exchange Optical Pumping型3He偏極フィルターシステムの開発
吉良 弘
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ジャーナル フリー

2011 年 21 巻 3 号 p. 146-151

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We have started a polarized 3He neutron spin filter project in order to increase utilization efficiency of polarized neutrons in Japan. We adopted the on-beam spin exchange optical pumping (SEOP) technique to polarize the nuclear spins of 3He atoms to keep stable polarization performance of the 3He neutron spin filter. We performed neutron beam tests of our compact in-situ SEOP neutron spin filter (NSF) system at the NOP beamline in the Japan Research Reactor No.3 (JRR-3) and the BL10 beamline in the Materials and Life Science Experimental Facility (MLF) of the Japan Proton Accelerator Research Complex (J-PARC). The 3He gas polarization of 73% was achieved. Now we are developing a new design in-situ SEOP NSF system as an incident beam polarizer for JRR-3. We also performed a polarized neutron scattering measurements of Ni at BL10. This paper gives the present status of the development of in-situ SEOP system in J-PARC.

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© 2011 日本中性子科学会
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