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Hayashida, Hirotoshi; Yamazaki, Dai; Ebisawa, Toru*; Maruyama, Ryuji; Soyama, Kazuhiko; Tasaki, Seiji*; Hino, Masahiro*; Matsubayashi, Masahito
Nuclear Instruments and Methods in Physics Research A, 634(1, Suppl.), p.S90 - S93, 2011/04
Times Cited Count：2 Percentile：20.18(Instruments & Instrumentation)In a neutron spin interferometer (NSI), incident neutrons are in states of up- and down-spin eigenstates and a phase difference between the eigenstates is observed after transmission through a magnetic sample. Since the phase difference is proportional to an integral of magnetic field along a trajectory of neutrons, NSI imaging provides projection images of a distribution of magnetic field in the sample. We tried to visualize magnetic field in permalloy film with and without stress as a demonstration of the NSI imaging. An experiment was carried out at C3-1-2-2, MINE2 port at the neutron guide hall of JRR-3M with wavelength of 0.88nm and wavelength resolution of 0.3% in FWHM. Permalloy film with thickness of 0.1 mm was used as a sample and was stressed by bending with angles of 45 and 180 
. As a result, images of decrease of a saturated magnetization and an increase of leak magnetic field with increasing the bending angle were obtained.
He neutron spin filter cellsSakaguchi, Yoshifumi; Kira, Hiroshi; Oku, Takayuki; Shinohara, Takenao; Suzuki, Junichi; Sakai, Kenji; Nakamura, Mitsutaka; Suzuya, Kentaro; Arai, Masatoshi; Takeda, Masayasu; et al.
Nuclear Instruments and Methods in Physics Research A, 634(1, Suppl.), p.S122 - S125, 2011/04
Hayashida, Hirotoshi; Hino, Masahiro*; Yamazaki, Dai; Ebisawa, Toru*; Maruyama, Ryuji; Soyama, Kazuhiko
no journal, ,
In a neutron spin interferometer (NSI), incident neutrons are in states of up- and down-spin eigenstates and a phase difference between the eigenstates is observed after transmission through a magnetic sample. The phase is proportional to an integral of magnetic field and neutron wavelength. Wavelength dispersion makes the phase dispersion especially and reduces a resolution for magnetic field which is more pronounced in samples with strong magnetic field. Hence high wavelength resolution is necessary to measuring the samples. A pulsed neutron source J-PARC can provides high wavelength resolution due to time-of-flight. A study of a magnetic field resolution on NSI at J-PARC was performed with Monte Carlo simulation. As a result, J-PARC enables us to measure a sample with an order of a magnetic field integral of 10 [Tmm] which is impossible to measure at continuous neutron source.
