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Development of a polarized 3 He neutron spin filter for POLANO at J-PARC

2017; IOP Publishing; Volume: 862; Linguagem: Inglês

10.1088/1742-6596/862/1/012011

1742-6596

Takashi Ino, Manabu Ohkawara, Kenji Ohoyama, Tetsuya Yokoo, Shinichi Itoh, Yusuke Nambu, Masafumi Fujita, H. Kira, Hirotoshi Hayashida, Kosuke Hiroi, K. Sakai, Takayuki Oku, Kazuhisa Kakurai,

Advanced NMR Techniques and Applications

We have developed a polarized 3He neutron spin filter (NSF) for a new polarized neutron spectrometer, POLANO, at the Japan Proton Accelerator Research Complex (J-PARC). POLANO aims to utilize high energy neutrons polarized by a 3He NSF and spin analyzed by an array of magnetic supermirrors for inelastic neutron scattering. The 3He gas is continuously polarized in-situ by spin-exchange optical pumping to provide a highly and stably polarized neutron beam. The POLANO 3He NSF is designed to polarize neutrons with energies as high as 200 meV and fit in a restricted space. It is equipped with adiabatic fast passage NMR that enables one to flip the 3He spins, and consequently, the neutron spins.