Precision magnetic field mapping for the 3He neutron spin filter

Takashi Ino; Yasushi Arimoto; Hiroshi Kira; Yoshifumi Sakaguchi; Takenao Shinohara; Kenji Sakai; Takayuki Oku; Kazuhisa Kakurai; Kenji Ohoyama

doi:10.1016/j.phpro.2013.03.193

Precision magnetic field mapping for the ³He neutron spin filter

Takashi Ino, Yasushi Arimoto, Hiroshi Kira, Yoshifumi Sakaguchi, Takenao Shinohara, Kenji Sakai, Takayuki Oku, Kazuhisa Kakurai, Kenji Ohoyama

Institute for Materials Research (IMR)

Research output: Contribution to journal › Conference article › peer-review

Abstract

³He neutron spin filters require a homogeneous magnetic field, otherwise the nuclear polarization of the ³He gas will easily be lost by small magnetic field gradients. Magnetic cavities with field gradients of 10^-4/cm or better are often in demand, and many such cavities - Helmholtz coils, solenoids, permanent magnet circuits, etc - have been developed [1]. These magnetic cavities are designed mostly by using simulations, but the actual magnetic fields may differ from the calculations because of the presence of the environmental magnetic field as well as nearby magnetic materials. To evaluate the real magnetic fields, a precision magnetometry system with a precision of 10^-5 was developed.

Original language	English
Pages (from-to)	183-190
Number of pages	8
Journal	Physics Procedia
Volume	42
DOIs	https://doi.org/10.1016/j.phpro.2013.03.193
Publication status	Published - 2013
Event	9th International Workshop on Polarised Neutrons in Condensed Matter Investigations, PNCMI 2012 - Paris, France Duration: 2012 Jul 2 → 2012 Jul 5

Keywords

Magnetic field
Magnetometer
Polarized neutron
Spin exchange optical pumping

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1016/j.phpro.2013.03.193

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title = "Precision magnetic field mapping for the 3He neutron spin filter",

abstract = "3He neutron spin filters require a homogeneous magnetic field, otherwise the nuclear polarization of the 3He gas will easily be lost by small magnetic field gradients. Magnetic cavities with field gradients of 10-4/cm or better are often in demand, and many such cavities - Helmholtz coils, solenoids, permanent magnet circuits, etc - have been developed [1]. These magnetic cavities are designed mostly by using simulations, but the actual magnetic fields may differ from the calculations because of the presence of the environmental magnetic field as well as nearby magnetic materials. To evaluate the real magnetic fields, a precision magnetometry system with a precision of 10-5 was developed.",

keywords = "Magnetic field, Magnetometer, Polarized neutron, Spin exchange optical pumping",

author = "Takashi Ino and Yasushi Arimoto and Hiroshi Kira and Yoshifumi Sakaguchi and Takenao Shinohara and Kenji Sakai and Takayuki Oku and Kazuhisa Kakurai and Kenji Ohoyama",

note = "Copyright: Copyright 2017 Elsevier B.V., All rights reserved.; 9th International Workshop on Polarised Neutrons in Condensed Matter Investigations, PNCMI 2012 ; Conference date: 02-07-2012 Through 05-07-2012",

year = "2013",

doi = "10.1016/j.phpro.2013.03.193",

language = "English",

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AU - Ino, Takashi

AU - Arimoto, Yasushi

AU - Kira, Hiroshi

AU - Sakaguchi, Yoshifumi

AU - Shinohara, Takenao

AU - Sakai, Kenji

AU - Oku, Takayuki

AU - Kakurai, Kazuhisa

AU - Ohoyama, Kenji

PY - 2013

Y1 - 2013

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AB - 3He neutron spin filters require a homogeneous magnetic field, otherwise the nuclear polarization of the 3He gas will easily be lost by small magnetic field gradients. Magnetic cavities with field gradients of 10-4/cm or better are often in demand, and many such cavities - Helmholtz coils, solenoids, permanent magnet circuits, etc - have been developed [1]. These magnetic cavities are designed mostly by using simulations, but the actual magnetic fields may differ from the calculations because of the presence of the environmental magnetic field as well as nearby magnetic materials. To evaluate the real magnetic fields, a precision magnetometry system with a precision of 10-5 was developed.

KW - Magnetic field

KW - Magnetometer

KW - Polarized neutron

KW - Spin exchange optical pumping

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