Highly polarized very cold neutrons through a permanent magnet quadrupole

Kaoru Taketani; Kenji Mishima; Takashi Ino; Tamaki Yoshioka; Suguru Muto; Takahiro Morishima; Hirohiko M. Shimizu; Takayuki Oku; Junichi Suzuki; Takenao Shinohara; Kenji Sakai; Hiromi Sato; Katsuya Hirota; Yoshie Otake; Masaaki Kitaguchi; Masahiro Hino; Yoshichika Seki; Yoshihisa Iwashita; Masako Yamada; Masahiro Ichikawa; Takanori Sugimoto; Shinsuke Kawasaki; Sachio Komamiya; Yoshio Kamiya; Hidetoshi Otono; Satoru Yamashita; Peter Geltenbort

doi:10.1016/j.physb.2009.06.045

Highly polarized very cold neutrons through a permanent magnet quadrupole

Kaoru Taketani^*, Kenji Mishima, Takashi Ino, Tamaki Yoshioka, Suguru Muto, Takahiro Morishima, Hirohiko M. Shimizu, Takayuki Oku, Junichi Suzuki, Takenao Shinohara, Kenji Sakai, Hiromi Sato, Katsuya Hirota, Yoshie Otake, Masaaki Kitaguchi, Masahiro Hino, Yoshichika Seki, Yoshihisa Iwashita, Masako Yamada, Masahiro IchikawaTakanori Sugimoto, Shinsuke Kawasaki, Sachio Komamiya, Yoshio Kamiya, Hidetoshi Otono, Satoru Yamashita, Peter Geltenbort

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

We obtained highly polarized very cold neutrons through a quadrupole magnet with a large aperture. When neutrons go through a quadrupole magnet, parallel-spin neutrons are attracted to the magnet axis and anti-parallel-spin neutrons are repelled off the axis. Therefore, the neutrons through a sufficiently long quadrupole magnet have completely parallel-spin. At the downstream of the quadrupole magnet, we placed another quadrupole magnet to divide neutrons into two regions depending on their spin directions. We obtained the neutron polarization from the integrated count of the two regions and found it was 99.88±0.09 (stat.)±0.05 (syst.)%.

Original language	English
Pages (from-to)	2643-2645
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	404
Issue number	17
DOIs	https://doi.org/10.1016/j.physb.2009.06.045
Publication status	Published - 2009 Sept 1
Externally published	Yes

Keywords

Neutron polarizer
Polarized neutron
Quadrupole magnet

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/j.physb.2009.06.045

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Taketani, K., Mishima, K., Ino, T., Yoshioka, T., Muto, S., Morishima, T., Shimizu, H. M., Oku, T., Suzuki, J., Shinohara, T., Sakai, K., Sato, H., Hirota, K., Otake, Y., Kitaguchi, M., Hino, M., Seki, Y., Iwashita, Y., Yamada, M., ... Geltenbort, P. (2009). Highly polarized very cold neutrons through a permanent magnet quadrupole. Physica B: Condensed Matter, 404(17), 2643-2645. https://doi.org/10.1016/j.physb.2009.06.045

Taketani, K, Mishima, K, Ino, T, Yoshioka, T, Muto, S, Morishima, T, Shimizu, HM, Oku, T, Suzuki, J, Shinohara, T, Sakai, K, Sato, H, Hirota, K, Otake, Y, Kitaguchi, M, Hino, M, Seki, Y, Iwashita, Y, Yamada, M, Ichikawa, M, Sugimoto, T, Kawasaki, S, Komamiya, S, Kamiya, Y, Otono, H, Yamashita, S & Geltenbort, P 2009, 'Highly polarized very cold neutrons through a permanent magnet quadrupole', Physica B: Condensed Matter, vol. 404, no. 17, pp. 2643-2645. https://doi.org/10.1016/j.physb.2009.06.045

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title = "Highly polarized very cold neutrons through a permanent magnet quadrupole",

abstract = "We obtained highly polarized very cold neutrons through a quadrupole magnet with a large aperture. When neutrons go through a quadrupole magnet, parallel-spin neutrons are attracted to the magnet axis and anti-parallel-spin neutrons are repelled off the axis. Therefore, the neutrons through a sufficiently long quadrupole magnet have completely parallel-spin. At the downstream of the quadrupole magnet, we placed another quadrupole magnet to divide neutrons into two regions depending on their spin directions. We obtained the neutron polarization from the integrated count of the two regions and found it was 99.88±0.09 (stat.)±0.05 (syst.)%.",

keywords = "Neutron polarizer, Polarized neutron, Quadrupole magnet",

author = "Kaoru Taketani and Kenji Mishima and Takashi Ino and Tamaki Yoshioka and Suguru Muto and Takahiro Morishima and Shimizu, {Hirohiko M.} and Takayuki Oku and Junichi Suzuki and Takenao Shinohara and Kenji Sakai and Hiromi Sato and Katsuya Hirota and Yoshie Otake and Masaaki Kitaguchi and Masahiro Hino and Yoshichika Seki and Yoshihisa Iwashita and Masako Yamada and Masahiro Ichikawa and Takanori Sugimoto and Shinsuke Kawasaki and Sachio Komamiya and Yoshio Kamiya and Hidetoshi Otono and Satoru Yamashita and Peter Geltenbort",

note = "Funding Information: We would like to thank T. Brenner for the intensive and very helpful assistance during the experiment. This work was supported by JSPS KAKENHI (19GS0210).",

year = "2009",

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doi = "10.1016/j.physb.2009.06.045",

language = "English",

volume = "404",

pages = "2643--2645",

journal = "Physica B: Condensed Matter",

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TY - JOUR

T1 - Highly polarized very cold neutrons through a permanent magnet quadrupole

AU - Taketani, Kaoru

AU - Mishima, Kenji

AU - Ino, Takashi

AU - Yoshioka, Tamaki

AU - Muto, Suguru

AU - Morishima, Takahiro

AU - Shimizu, Hirohiko M.

AU - Oku, Takayuki

AU - Suzuki, Junichi

AU - Shinohara, Takenao

AU - Sakai, Kenji

AU - Sato, Hiromi

AU - Hirota, Katsuya

AU - Otake, Yoshie

AU - Kitaguchi, Masaaki

AU - Hino, Masahiro

AU - Seki, Yoshichika

AU - Iwashita, Yoshihisa

AU - Yamada, Masako

AU - Ichikawa, Masahiro

AU - Sugimoto, Takanori

AU - Kawasaki, Shinsuke

AU - Komamiya, Sachio

AU - Kamiya, Yoshio

AU - Otono, Hidetoshi

AU - Yamashita, Satoru

AU - Geltenbort, Peter

N1 - Funding Information: We would like to thank T. Brenner for the intensive and very helpful assistance during the experiment. This work was supported by JSPS KAKENHI (19GS0210).

PY - 2009/9/1

Y1 - 2009/9/1

N2 - We obtained highly polarized very cold neutrons through a quadrupole magnet with a large aperture. When neutrons go through a quadrupole magnet, parallel-spin neutrons are attracted to the magnet axis and anti-parallel-spin neutrons are repelled off the axis. Therefore, the neutrons through a sufficiently long quadrupole magnet have completely parallel-spin. At the downstream of the quadrupole magnet, we placed another quadrupole magnet to divide neutrons into two regions depending on their spin directions. We obtained the neutron polarization from the integrated count of the two regions and found it was 99.88±0.09 (stat.)±0.05 (syst.)%.

AB - We obtained highly polarized very cold neutrons through a quadrupole magnet with a large aperture. When neutrons go through a quadrupole magnet, parallel-spin neutrons are attracted to the magnet axis and anti-parallel-spin neutrons are repelled off the axis. Therefore, the neutrons through a sufficiently long quadrupole magnet have completely parallel-spin. At the downstream of the quadrupole magnet, we placed another quadrupole magnet to divide neutrons into two regions depending on their spin directions. We obtained the neutron polarization from the integrated count of the two regions and found it was 99.88±0.09 (stat.)±0.05 (syst.)%.

KW - Neutron polarizer

KW - Polarized neutron

KW - Quadrupole magnet

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U2 - 10.1016/j.physb.2009.06.045

DO - 10.1016/j.physb.2009.06.045

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AN - SCOPUS:68649088520

SN - 0921-4526

VL - 404

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EP - 2645

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - 17

ER -

Highly polarized very cold neutrons through a permanent magnet quadrupole

Abstract

Keywords

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