Multilayer Neutron Polarizing Mirrors Working Under a Low External Magnetic Field Less Than 100 Gausses

Multilayer Neutron Polarizing Mirrors Working Under a Low External Magnetic Field Less Than 100 Gausses

We have developed multilayer neutron polarizing mirrors which are controlled under an external magnetic field less than 100 gausses. Multilayers of Permalloy-Ge and Fe-Ge have been evaporated on Si wafers in the magnetic field of about 130 gausses parallel to the surface of the wafer. The polarizing...

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Veröffentlicht in:Journal of neutron research 1997-04, Vol.5 (3), p.123-132
Hauptverfasser: Kawai, Takeshi, Ebisawa, Toru, Tasaki, Seiji, Eguchi, Yoshiaki, Hino, Masahiro, Achiwa, Norio
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container_end_page 132
container_issue 3
container_start_page 123
container_title Journal of neutron research
container_volume 5
creator Kawai, Takeshi
Ebisawa, Toru
Tasaki, Seiji
Eguchi, Yoshiaki
Hino, Masahiro
Achiwa, Norio
description We have developed multilayer neutron polarizing mirrors which are controlled under an external magnetic field less than 100 gausses. Multilayers of Permalloy-Ge and Fe-Ge have been evaporated on Si wafers in the magnetic field of about 130 gausses parallel to the surface of the wafer. The polarizing efficiencies of Fe-Ge and Permalloy-Ge multilayer mirrors were 95% and 91% respectively under a low external magnetic field of 80 gausses. Under a very low external field of 50 gausses, the polarizing efficiency was 90% in case of Permalloy-Ge. A neutron pulse was obtained by applying a pulsed magnetic field of about 50 gausses parallel to the Permalloy-Ge polarizing mirror. The pulse rise time is the order of 100 μs in the present pulsed magnetic devices.
doi_str_mv 10.1080/10238169708200218
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title Multilayer Neutron Polarizing Mirrors Working Under a Low External Magnetic Field Less Than 100 Gausses
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