Observation of field-induced single-ion magnetic anisotropy in a multiorbital Kondo alloy (Lu,Yb)RhZn

Kitazawa, Takafumi; Ikeda, Yoichi*; Sakakibara, Toshiro*; Matsuo, Akira*; Shimizu, Yusei*; Tokunaga, Yo; Haga, Yoshinori; Kindo, Koichi*; Nambu, Yusuke*; Ikeuchi, Kazuhiko*; et al.

Physical Review B, 108(8), p.085105_1 - 085105_7, 2023/08

https://doi.org/10.1103/PhysRevB.108.085105

Current status of extreme environment single crystal neutron diffractometer SENJU, and latest news from JRR-3

Kaneko, Koji; Ohara, Takashi; Kiyanagi, Ryoji; Kawasaki, Takuro; Oikawa, Kenichi; Tamura, Itaru; Yamauchi, Yasuhiro; Hanashima, Takayasu*; Moyoshi, Taketo*; Nakao, Akiko*; et al.

no journal, , 

Development of a He nuclear spin flip system for the in-situ SEOP He filter

Hayashida, Hirotoshi*; Kira, Hiroshi*; Suzuki, Junichi*; Oku, Takayuki; Sakai, Kenji; Hiroi, Kosuke; Shinohara, Takenao; Kakurai, Kazuhisa; Aizawa, Kazuya; Arai, Masatoshi; et al.

no journal, , 

no abstracts in English

Development status and future plan of a He neutron spin filter

Oku, Takayuki; Sakai, Kenji; Hiroi, Kosuke; Shinohara, Takenao; Aizawa, Kazuya; Kakurai, Kazuhisa; Kira, Hiroshi*; Hayashida, Hirotoshi*; Kiriyama, Koji*; Suzuki, Junichi*; et al.

no journal, , 

We have been developing a He neutron spin filter for application at J-PARC MLF. The neutron spin filter is available for neutrons in a wide energy range, and is also effective for a divergent neutron beam. Therefore, it is very useful in the neutron scattering experiment. So far, we have developed a compact laser optics with a volume holographic grating (VHG) elements, and have constructed an on-beam SEOP based He neutron spin filter. The polarization analysis tests were performed with the He neutron spin filter at several neutron beamlines for the sans, reflectivity and neutron imaging experiments. To extend the application range of the He neutron spin filter at J-PARC MLF, we plan to develop larger size cells, higher power laser for the SEOP, and prepare working area for the filter inside the MLF experimental hall.

Recovery and progress in sample environment at JRR-3

Kaneko, Koji; Osakabe, Toyotaka; Shimojo, Yutaka; Yamauchi, Hiroki; Moriai, Atsushi; Asami, Toshio*; Kawana, Daichi*; Sugiura, Ryosuke*; Okawara, Manabu*

no journal, , 

Current status of a He spin filter development

Oku, Takayuki; Sakai, Kenji; Hiroi, Kosuke; Watanabe, Masao; Shinohara, Takenao; Aizawa, Kazuya; Kakurai, Kazuhisa*; Kira, Hiroshi*; Hayashida, Hirotoshi*; Kiriyama, Koji*; et al.

no journal, , 

We have been developing a He neutron spin filter for application at J-PARC MLF. The He neutron spin filter is available for neutrons in a wide energy range, and is also effective for a divergent neutron beam. Therefore, it is very useful in the neutron scattering experiment. So far, we have developed a compact laser optics with a volume holographic grating (VHG) elements, and have constructed an on-beam SEOP based He neutron spin filter. The polarization analysis tests were performed with the He neutron spin filter at several neutron beamlines for the sans, reflectivity and neutron imaging experiments. To extend the application range of the He neutron spin filter at J-PARC MLF, we plan to develop larger size cells, higher power laser for the SEOP, and prepare working area for the filter inside the MLF experimental hall.

Development and application of an in-situ SEOP He neutron spin filter

Oku, Takayuki; Hayashida, Hirotoshi; Sakai, Kenji; Shinohara, Takenao; Nakamura, Mitsutaka; Aizawa, Kazuya; Arai, Masatoshi; Endo, Yasuo; Kakurai, Kazuhisa; Kira, Hiroshi*; et al.

no journal, , 

We have been developing an in-situ SEOP He neutron spin filter to apply it to pulsed neutron experiments at J-PARC/MLF. To introduce the He neutron spin filter into the instruments of the pulsed neutron facility such as J-PARC/MLF, it is important to make the system compact and stable, because the system is located inside thick and bulky radiation shields for high energy ray and neutrons. In this study, we have developed a compact laser optics with a volume holographic grating (VHG) element, and composed an in-situ SEOP He neutron spin filter. We have started to apply the He spin filer as an analyzer to polarized neutron small angle scattering and reflection measurements. A magnetic field imaging are also being tested with the two He neutron spin filter cells which are polarized by the ex-situ SEOP technique. In this paper, we report the design of our SEOP He neutron spin filter system and some results of the related polarized neutron beam experiments.

Development status of NMR monitor for polarized He spin filter at J-PARC/MLF

Sakai, Kenji; Oku, Takayuki; Hayashida, Hirotoshi; Kira, Hiroshi*; Okawara, Manabu*; Shinohara, Takenao; Oikawa, Kenichi; Harada, Masahide; Kakurai, Kazuhisa; Aizawa, Kazuya; et al.

no journal, , 

A polarized He spin filter, which polarizes neutrons due to a large neutron absorption cross section of He with strong spin selectivity, works as a simple and convenient neutron spin polarizer. For realizing this filter, a device which monitors a polarization of He spin filter is indispensable. We developed the He polarization monitor based on a nuclear magnetic resonance method by an adiabatic fast passage (AFP NMR) at the MLF of J-PARC. The monitor based on the AFP NMR realizes the polarized He spin flipper functioning as the neutron spin polarizer and flipper. However it has disadvantages on the size of He cell limited by a RF coil and its complicated device structure. So we have developed the monitor based on a pulse NMR which uses only a pick up coil and enables the simple device structure of its own, and realized the more flexible monitor system by utilizing the both of pulse NMR and AFP NMR.