Developments of In-Situ SEOP Polarized 3 He Neutron Spin Filter in Japan

H. Kira, Y. Sakaguchi, T. Oku, J. Suzuki, M. Nakamura, M. Arai, Y. Endoh, Lieh-Jeng Chang, K. Kakurai, Y. Arimoto, T. Ino, H. M. Shimizu, T. Kamiyama, K. Ohoyama, H. Hiraka, K. Tsutsumi, K. Yamada

研究成果: Article

10 引文 斯高帕斯(Scopus)

摘要

We launched the polarized 3 He neutron spin filters (NSF) project in order to provide neutron polarization for the pulsed neutron beams in Japan. We adopted the in-situ spin exchange optical pumping (SEOP) technique to polarize the nuclear spin of 3 He atoms because it has some advantages for our applications. The overall system size is compact and it avoids the problem of the time decay of nuclear spin of 3 He thus suppressing the costs of maintenance and providing other advantages [1, 2] with respect to data analysis and quality. In this paper, we performed pulsed neutron beam tests of our compact in-situ SEOP NSF system at the BL10 beamline in the Materials and Life Science Experimental Facility of the Japan Proton Accelerator Research Complex (J-PARC). The polarization of the 3 He gas reached was 73 % and a pump-up time constant of 9.5 h was observed. This paper is a status report about the development of in-situ SEOP NSF system for the pulsed beam at J-PARC.

原文English
文章編號012014
期刊Journal of Physics: Conference Series
294
發行號1
DOIs
出版狀態Published - 2011 一月 1

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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