Quantitative magnetic field imaging by polarized pulsed neutrons at J-PARC

Shinohara, T.; Sakai, Kenji; Ohi, Motoki; Kai, Tetsuya; Harada, Masahide; Oikawa, Kenichi; Maekawa, Fujio; Suzuki, Jun–ichi; Oku, Takayuki; Takata, Shigeo; Aizawa, Katsuo; Arai, M.; Kiyanagi, Y.

doi:10.1016/j.nima.2011.01.099

Cited by 54 publications

(30 citation statements)

References 18 publications

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“…Neutron magnetic imaging is another possible application of the device, in which transmission images reveal regions of different magnetic field distributions. 37 Our device is designed with a zero field sample chamber, which removes the need for a magnetic guide field at the sample when imaging using polarized neutron. On the other hand, in our present device, the sample temperature cannot be independently controlled, which restricts the range of sample temperatures to be between 20 K and approximately 80 K.…”

Section: Discussionmentioning

confidence: 99%

Compact spherical neutron polarimeter using high-Tc YBCO films

Wang

Parnell

Hamilton

et al. 2016

Review of Scientific Instruments

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We describe a simple, compact device for spherical neutron polarimetry measurements at small neutron scattering angles. The device consists of a sample chamber with very low (<0.01 G) magnetic field flanked by regions within which the neutron polarization can be manipulated in a controlled manner. This allows any selected initial and final polarization direction of the neutrons to be obtained. We have constructed a prototype device using high-Tc superconducting films and mu-metal to isolate regions with different magnetic fields and tested device performance in transmission geometry. Finite-element methods were used to simulate the device’s field profile and these have been verified by experiment using a small solenoid as a test sample. Measurements are reported using both monochromatic and polychromatic neutron sources. The results show that the device is capable of extracting sample information and distinguishing small angular variations of the sample magnetic field. As a more realistic test, we present results on the characterization of a 10 μm thick Permalloy film in zero magnetic field, as well as its response to an external magnetic field.

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Section: Discussionmentioning

confidence: 99%

Compact spherical neutron polarimeter using high-Tc YBCO films

Wang

Parnell

Hamilton

et al. 2016

Review of Scientific Instruments

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“…The neutron energy-dependent imaging techniques of Bragg-edge [8], resonance absorption [9] and magnetic imaging [10] are available by utilizing a short-pulse neutron source in addition to the conventional neutron radiography. Here we show a demonstration result of the resonance absorption imaging.…”

Section: Resonance Absorption Imagingmentioning

confidence: 99%

Commissioning start of Energy-Resolved Neutron Imaging System, RADEN in J-PARC

Shinohara

Kai

2015

Neutron News

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“…By using polarized neutron we can obtain the spatial distribution of magnetic field [23,24]. The magnetic field is evaluated by measuring the rotation of a neutron spin as the change of the neutron polarization after passing the magnetic field.…”

Section: Fundamental Experiments For Magnetic Field Imagingmentioning

confidence: 99%

Activity of Hokkaido University Neutron Source, HUNS

et al. 2014

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Hokkaido University neutron source, HUNS was completed in 1973, and has been used actively for developments of moderators, neutron instruments, neutron devices and new methods for 40 years although its power is not so high. Recently, a pulsed neutron imaging method has been developed and a new type of small angle neutron scattering method has been also developed. The pulsed neutron imaging is a unique method that can give the physical quantities such as crystallographic quantities of materials over wide area of the real space. So far, the small angle neutron scattering (SANS) is considered to be impossible at a neutron source with a power of HUNS. However, mini focusing SANS (mfSANS) was developed and proved to be useful. Here, we present the present activities on the pulsed neutron imaging and mfSANS at HUNS.

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Quantitative magnetic field imaging by polarized pulsed neutrons at J-PARC

Cited by 54 publications

References 18 publications

Compact spherical neutron polarimeter using high-Tc YBCO films

Compact spherical neutron polarimeter using high-Tc YBCO films

Commissioning start of Energy-Resolved Neutron Imaging System, RADEN in J-PARC

Activity of Hokkaido University Neutron Source, HUNS

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