Development of polarized Xe gas target for neutron experiment at J-PARC

Sakai, Kenji; Oku, Takayuki; Shinohara, Takenao; Kira, Hiroshi; Oi, Motoki; Maekawa, Fujio; Kakurai, Kazuhisa; Ino, Takashi*; Arimoto, Yasushi*; Shimizu, Hirohiko*; et al.

Journal of Physics; Conference Series, 340, p.012037_1 - 012037_7, 2012/02

https://doi.org/10.1088/1742-6596/340/1/012037

At the Materials and Life science experimental Facility (MLF) in J-PARC, an experiment of detecting a neutron polarizing ability caused by a neutron-nuclear (n-N) spin correlation term at a resonant peak of Xe is planned. The Xe gas having a high polarization under low magnetic field and room temperature by a spin exchange optical pumping (SEOP) technique is expected to become a suitable target for verification of the neutron optical theorem (NOPT). We evaluated measurable quantities based on the NOPT, developed a polarized Xe gas system, and carried out a feasibility test of our apparatus. This paper reports on the present status of the experiment.

Developments of in-situ SEOP polarized He neutron spin filter in Japan

Kira, Hiroshi; Sakaguchi, Yoshifumi; Oku, Takayuki; Suzuki, Junichi; Nakamura, Mitsutaka; Arai, Masatoshi; Endo, Yasuo; Chang, L.-J.; Kakurai, Kazuhisa; Arimoto, Yasushi*; et al.

Journal of Physics; Conference Series, 294, p.012014_1 - 012014_5, 2011/06

https://doi.org/10.1088/1742-6596/294/1/012014

Research on glass cells for He neutron spin filters

Sakaguchi, Yoshifumi; Kira, Hiroshi; Oku, Takayuki; Shinohara, Takenao; Suzuki, Junichi; Sakai, Kenji; Nakamura, Mitsutaka; Suzuya, Kentaro; Aizawa, Kazuya; Arai, Masatoshi; et al.

Physica B; Condensed Matter, 406(12), p.2443 - 2447, 2011/06

https://doi.org/10.1016/j.physb.2010.12.020

Development and test of SEOP neutron spin filter in Japan

Kira, Hiroshi; Sakaguchi, Yoshifumi; Oku, Takayuki; Suzuki, Junichi; Nakamura, Mitsutaka; Arai, Masatoshi; Kakurai, Kazuhisa; Endo, Yasuo; Arimoto, Yasushi*; Ino, Takashi*; et al.

Physica B; Condensed Matter, 406(12), p.2433 - 2435, 2011/06

https://doi.org/10.1016/j.physb.2010.12.019

MeV- and sub-MeV-photon sources based on Compton backscattering at SPring-8 and KPSI-JAEA

Kawase, Keigo; Kando, Masaki; Hayakawa, Takehito; Daito, Izuru; Kondo, Shuji; Homma, Takayuki; Kameshima, Takashi; Kotaki, Hideyuki; Chen, L.*; Fukuda, Yuji; et al.

Nuclear Physics Review, 26(Suppl.), p.94 - 99, 2009/07

We constructed MeV- and sub-MeV-photon sources by means of Compton backscattering with a laser light and an electron beam at SPring-8 and KPSI-JAEA. MeV-photon source consists of a continuous-wave optically-pumped far infrared laser and an 8-GeV stored electron beam. Sub-MeV-photon source consists of a Nd:YAG pulse-laser and an 150-MeV electron beam accelerated by a microtron. Both source have been succeeded backscattered photon generation. In this talk, I will present characteristics and future prospects of these photon sources.

Di-triton molecular structure in He

Akimune, Hidetoshi*; Yamagata, Tamio*; Nakayama, Shintaro*; Arimoto, Yasushi*; Fujiwara, Mamoru; Fushimi, Kenichi*; Hara, Keigo*; Ota, Masahisa*; Shiokawa, Atsuko*; Tanaka, Masayoshi*; et al.

Physical Review C, 67(5), p.051302_1 - 051302_4, 2003/05

https://doi.org/10.1103/PhysRevC.67.051302

no abstracts in English

Present status of the development of polarized He neutron spin filter cells

Sakaguchi, Yoshifumi; Kira, Hiroshi; Oku, Takayuki; Shinohara, Takenao; Suzuki, Junichi; Sakai, Kenji; Nakamura, Mitsutaka; Suzuya, Kentaro; Aizawa, Kazuya; Arai, Masatoshi; et al.

no journal, , 

no abstracts in English

Development of a compact laser optics system for an in-situ SEOP He neutron spin filter

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

no journal, , 

We have been developing an SEOP polarized He neutron spin filter to apply it to pulsed neutron experiments. The He based neutron polarizer is useful in experiments such as polarized neutron scattering experiments in a wide q-range, inelastic scattering experiment with high energy magnetic and phonon excitation, magnetic field imaging and etc, since it is effective for neutrons in a wide energy range. To introduce the SEOP polarized He neutron spin filter into the instruments of the pulsed neutron facility such as J-PARC, 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 system with a volume holographic grating (VHG) element for the SEOP system. We report the design of our spin filter system and some results of the He polarizing experiments in this paper.

Development and application of an in-situ SEOP He neutron spin filter at J-PARC/MLF

Oku, Takayuki; Kira, Hiroshi*; Hayashida, Hirotoshi; Sakai, Kenji; Shinohara, Takenao; Sakaguchi, Yoshifumi*; Ino, Takashi*; Arimoto, Yasushi*; Oyama, Kenji*; Hiraka, Haruhiro*; et al.

no journal, , 

The He based neutron polarizer is useful in experiments such as polarized neutron scattering experiments in a wide q-range, etc., since it is effective for neutrons in a wide energy range. To introduce the in-situ SEOP polarized 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 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. 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.

Neutron beam fundamentals development in Japan; Utilization of steady state and pulsed neutrons

Kakurai, Kazuhisa; Oku, Takayuki; Hayashida, Hirotoshi; Sakai, Kenji; Shinohara, Takenao; Nakamura, Mitsutaka; Wakimoto, Shuichi; Yamazaki, Dai; Sakasai, Kaoru; Soyama, Kazuhiko; et al.

no journal, ,