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Measurement of the neutron beam polarization of BL05/NOP beamline at J-PARC |
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| Authors: | T. Ino Y. ArimotoT. Yoshioka K. MishimaK. Taketani S. MutoH.M. Shimizu H. KiraY. Sakaguchi T. OkuK. Sakai T. ShinoharaJ. Suzuki H. OtonoH. Oide S. YamashitaS. Imajo H. FunahashiM. Yamada Y. IwashitaM. Kitaguchi M. HinoZ. Suzuki T. SanukiT. Seki K. HirotaK. Ikeda H. SatoY. Otake H. OhmoriT. Morishima T. Shima |
| Affiliation: | a KEK, Tsukuba, Ibaraki 305-0801, Japan b JAEA, Tokai, Ibaraki 319-1195, Japan c ICEPP, University of Tokyo, Bunkyo, Tokyo 113-0033, Japan d Kyoto University, Kyoto, Kyoto 606-8501, Japan e ICR, Kyoto University, Uji, Kyoto 611-0011, Japan f KURRI, Kyoto University, Kumatori, Osaka 590-0494, Japan g Tohoku University, Sendai, Miyagi 980-8576, Japan h RIKEN, Wako, Saitama 351-0198, Japan i Osaka University, Toyonaka, Osaka 560-0043, Japan j RCNP, Osaka University, Ibaraki, Osaka 567-0047, Japan |
| Abstract: | We measured the neutron beam polarization of the BL05/NOP (Neutron Optics and Physics) beamline at J-PARC with an accuracy of less than 10−3 using polarized 3He gas as a neutron spin analyzer. Precise polarimetry of the neutron beam is necessary to understand the beamline optics as well as for the asymmetry measurements of the neutron beta decay, which are planned in this beamline. |
| Keywords: | 3He polarization Polarized neutron Neutron spin filter Spin-exchange optical pumping Neutron beta decay J-PARC |
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