8 November 2001 Development of a magnetic lens and prism for cold neutrons and their application to neutron scattering experiments
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We have been developing a neutron lens and prism based on neutron refractive optics. As a neutron has a magnetic dipole moment, it is accelerated in a magnetic field gradient. Thus, we can control a neutron beam free from beam attenuation using the magnetic field gradient. Moreover, its spin dependence of the acceleration is profitable in the case of using the polarized neutron beam. The sextupole magnetic field functions as a focusing or defocusing lens for neutrons depending on the neutron spin states. The focusing and defocusing effects of a prototype sextupole magnet was experimentally studied. By combining focusing and defocusing functions of the sextupole magnet, we can control the neutron beam shape and divergence more flexibly. Adiabatic and nonadiabatic field connections make it possible to realize the magnetic doublet system. A quadrupole magnetic field functions as a neutron prism, which were experimentally confirmed. The neutron spin and energy dependence of the refracting power is applicable to an analysis of the neutron spin and energy. In this paper, the details of the experimental results of the magnetic devices are described and their applications in the neutron scattering experiment are discussed.
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Takayuki Oku, Takayuki Oku, Tomohiro Adachi, Tomohiro Adachi, Hiromi Sato, Hiromi Sato, Chico Otani, Chico Otani, Yoshiyuki Takizawa, Yoshiyuki Takizawa, Kenji Sakai, Kenji Sakai, Hirohiko M. Shimizu, Hirohiko M. Shimizu, Keita Sasaki, Keita Sasaki, Hirokatsu Iwasa, Hirokatsu Iwasa, Takashi Kamiyama, Takashi Kamiyama, Yoshiaki Kiyanagi, Yoshiaki Kiyanagi, Takashi Ino, Takashi Ino, Michihiro Furusaka, Michihiro Furusaka, Junichi Suzuki, Junichi Suzuki, Masahiro Hino, Masahiro Hino, Seiji Tasaki, Seiji Tasaki, Tohru Ebisawa, Tohru Ebisawa, } "Development of a magnetic lens and prism for cold neutrons and their application to neutron scattering experiments", Proc. SPIE 4509, Neutron Optics, (8 November 2001); doi: 10.1117/12.448064; https://doi.org/10.1117/12.448064

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