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Development of modulating permanent magnet sextupole lens for focusing of pulsed cold neutrons

Modulating permanent magnet sextupole lens (PMSx) for focusing pulsed cold neutrons is under development. The synchronized modulation of its field gradient suppresses the chromatic aberration which arises from the Time Of Flight method. The strength of the magnetic field, the torque, and the rise of...

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Published in:Physica. B, Condensed matter Condensed matter, 2009-09, Vol.404 (17), p.2646-2651
Main Authors: Yamada, Masako, Iwashita, Yoshihisa, Ichikawa, Masahiro, Sugimoto, Takanori, Tongu, Hiromu, Fujisawa, Hiroshi, Shimizu, Hirohiko M., Ino, Takashi, Mishima, Kenji, Taketani, Kaoru, Yoshioka, Tamaki, Muto, Suguru, Morishima, Takahiro, Oku, Takayuki, Suzuki, Jun-ichi, Shinohara, Takenao, Sakai, Kenji, Sato, Hiromi, Hirota, Katsuya, Otake, Yoshie, Seki, Yoshichika, Kawasaki, Shinsuke, Komamiya, Sachio, Kamiya, Yoshio, Otono, Hidetoshi, Yamashita, Satoru, Geltenbort, Peter
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cited_by cdi_FETCH-LOGICAL-c334t-adc43855f5d0d9775826c70d378b7fedeb85df642244046e4a90ae432ce509cf3
cites cdi_FETCH-LOGICAL-c334t-adc43855f5d0d9775826c70d378b7fedeb85df642244046e4a90ae432ce509cf3
container_end_page 2651
container_issue 17
container_start_page 2646
container_title Physica. B, Condensed matter
container_volume 404
creator Yamada, Masako
Iwashita, Yoshihisa
Ichikawa, Masahiro
Sugimoto, Takanori
Tongu, Hiromu
Fujisawa, Hiroshi
Shimizu, Hirohiko M.
Ino, Takashi
Mishima, Kenji
Taketani, Kaoru
Yoshioka, Tamaki
Muto, Suguru
Morishima, Takahiro
Oku, Takayuki
Suzuki, Jun-ichi
Shinohara, Takenao
Sakai, Kenji
Sato, Hiromi
Hirota, Katsuya
Otake, Yoshie
Seki, Yoshichika
Kawasaki, Shinsuke
Komamiya, Sachio
Kamiya, Yoshio
Otono, Hidetoshi
Yamashita, Satoru
Geltenbort, Peter
description Modulating permanent magnet sextupole lens (PMSx) for focusing pulsed cold neutrons is under development. The synchronized modulation of its field gradient suppresses the chromatic aberration which arises from the Time Of Flight method. The strength of the magnetic field, the torque, and the rise of temperature during its operation are studied on a fabricated prototype. Experiments on focusing pulsed very cold neutrons (VCN) at ILL (Institute of Laue Langevin, France) were carried out and VCN with around λ=40 Å were focused by the PMSx at a focal length of about 0.5 m. The experimental results are presented in conjunction with the principle of the neutron focusing and the modulating method of the focal strength of permanent magnet lens with the double ring structure.
doi_str_mv 10.1016/j.physb.2009.06.132
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subjects Focusing
Permanent magnet sextupole lens
Pulse
SANS
Very cold neutrons
title Development of modulating permanent magnet sextupole lens for focusing of pulsed cold neutrons
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