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Development and test of SEOP neutron spin filter in Japan |
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| Authors: | H. Kira Y. Sakaguchi T. Oku J. Suzuki M. Nakamura M. Arai K. Kakurai Y. Endo Y. Arimoto T. Ino H.M. Shimizu T. Kamiyama K. Tsutsumi K. Ohoyama H. Hiraka K. Yamada L.-J. Chang |
| Affiliation: | a Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki 319-1195, Japan b High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan c Institute for Materials Research (IMR), Tohoku University, Sendai, Japan d WPI Advanced Institute for Materials Research, Tohoku University, 2-1-1 Katahira Aoba-ku Sendai, Miyagi 980-8577, Japan e Department of Physics, National Cheng Kung University, Tainan 70101, Taiwan f Nuclear Science and Technology Development Center, National Tsing Hua University, Hsinchu 30013, Taiwan |
| Abstract: | We have begun the development of an in-situ spin-exchange optical pumping (SEOP) system aiming to use it as a neutron spin filter for incident beam polarization at the Japan Proton Accelerator Research Complex (J-PARC). To use it, it is recommended that the optics be adjusted easily, have high stability, and have a small size. In this paper we improved our previous SEOP system aiming to use it in J-PARC and performed a neutron beam test at the JRR-3 NOP beamline to see the performance of the neutron spin filter (NSF). The polarization of the 3He gas reached 73%. This paper gives the present status of the development of in-situ SEOP system in J-PARC. |
| Keywords: | Neutron spin filter Polarized helium-3 Spin exchange optical pumping |
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