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https://doi.org/10.1063/1.1150576
このアイテムへのリンクには次のURLをご利用ください:http://hdl.handle.net/11094/23132
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タイトル
High precision polarimeter system for atomic polarization and tilted-foil experiments with 1.7 keV/amu 14N+ beam
著者
Shimizu, S.
Shimizu, S.
Doumoto, E.
Doumoto, E.
Tanimoto, S.
Tanimoto, S.
Nakamura, M.
Nakamura, M.
Hirayama, Y.
Hirayama, Y.
Horie, K.
Horie, K.
Shigematsu, T.
Shigematsu, T.
Izumi, H.
Izumi, H.
Shimoda, T.
Shimoda, T.
Takahashi, N.
Takahashi, N.
抄録
A high precision atomic polarimeter system for the use in beam-foil spectroscopy experiments with a few keV/amu heavy-ion beams has been developed. The polarimeter measures the circular polarization of fluorescences from the beam ion in-flight after the beam-foil interaction. The present system has two identical such polarimeters in both sides of the beam axis to reduce the systematic errors such due to the fluctuations of beam current, background and so on. A successful use of an ultrathin carbon foil (1.5 μg/cm^2), which was durable for several hours against a few hundred nA beam irradiation, enabled the beam-foil experiments with such low energy heavy-ion beams. A performance test of the polarimeter system was carried out in the tilted foil experiments with a 1.7 keV/amu ^<14>N + beam. The atomic polarization was observed for the transition 1s^22s^22p3p ^1D → 1s^22s^22p3p ^1P, whose fluorescence wavelength is 399.5 nm, in the N+ ion (N II). The polarization was approximately -2% for the tilt angle of -40° and showed monotone increasing with increasing tilt angle up to + 2% for + 40°. The polarization at 0° was (0.002±0.25)%, which is highly consistent with the expected polarization of 0%. This result indicates the high reliability of the present polarimeter system. This is the first tilted-foil experiment at such low beam energy. The present experimental technique will be very useful for studies of the polarization mechanism of the beam-foil interaction.
公開者
American Institute of Physics
掲載誌名
Review of Scientific Instruments
巻
71
号
5
開始ページ
2045
終了ページ
2049
刊行年月
2000-05
ISSN
00346748
NCID
AA00817730
DOI
info:doi/10.1063/1.1150576
URL
http://hdl.handle.net/11094/23132
関連情報 (references)
http://rsi.aip.org/resource/1/rsinak/v71/i5/p2045_s1
権利情報
Copyright 2000 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Review of Scientific Instruments, 71(5), 2045-2049, 2000 and may be found at http://dx.doi.org/10.1063/1.1150576
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学術雑誌論文 Journal Article
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DCTERMS.bibliographicCitation
Review of Scientific Instruments.71(5) P.2045-P.2049
DC.title
High precision polarimeter system for atomic polarization and tilted-foil experiments with 1.7 keV/amu 14N+ beam
DC.creator
Shimizu, S.
Doumoto, E.
Tanimoto, S.
Nakamura, M.
Hirayama, Y.
Horie, K.
Shigematsu, T.
Izumi, H.
Shimoda, T.
Takahashi, N.
DC.publisher
American Institute of Physics
DC.language" scheme="DCTERMS.RFC1766
英語
DCTERMS.issued" scheme="DCTERMS.W3CDTF
2000-05
DC.identifier
info:doi/10.1063/1.1150576
DC.identifier" scheme="DCTERMS.URI
http://hdl.handle.net/11094/23132
DCTERMS.abstract
A high precision atomic polarimeter system for the use in beam-foil spectroscopy experiments with a few keV/amu heavy-ion beams has been developed. The polarimeter measures the circular polarization of fluorescences from the beam ion in-flight after the beam-foil interaction. The present system has two identical such polarimeters in both sides of the beam axis to reduce the systematic errors such due to the fluctuations of beam current, background and so on. A successful use of an ultrathin carbon foil (1.5 μg/cm^2), which was durable for several hours against a few hundred nA beam irradiation, enabled the beam-foil experiments with such low energy heavy-ion beams. A performance test of the polarimeter system was carried out in the tilted foil experiments with a 1.7 keV/amu ^<14>N + beam. The atomic polarization was observed for the transition 1s^22s^22p3p ^1D → 1s^22s^22p3p ^1P, whose fluorescence wavelength is 399.5 nm, in the N+ ion (N II). The polarization was approximately -2% for the tilt angle of -40° and showed monotone increasing with increasing tilt angle up to + 2% for + 40°. The polarization at 0° was (0.002±0.25)%, which is highly consistent with the expected polarization of 0%. This result indicates the high reliability of the present polarimeter system. This is the first tilted-foil experiment at such low beam energy. The present experimental technique will be very useful for studies of the polarization mechanism of the beam-foil interaction.
DC.rights
Copyright 2000 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Review of Scientific Instruments, 71(5), 2045-2049, 2000 and may be found at http://dx.doi.org/10.1063/1.1150576
citation_title
High precision polarimeter system for atomic polarization and tilted-foil experiments with 1.7 keV/amu 14N+ beam
citation_author
Shimizu, S.
Doumoto, E.
Tanimoto, S.
Nakamura, M.
Hirayama, Y.
Horie, K.
Shigematsu, T.
Izumi, H.
Shimoda, T.
Takahashi, N.
citation_publisher
American Institute of Physics
citation_language
英語
citation_date
2000-05
citation_journal_title
Review of Scientific Instruments
citation_volume
71
citation_issue
5
citation_firstpage
2045
citation_lastpage
2049
citation_issn
00346748
citation_doi
info:doi/10.1063/1.1150576
citation_public_url
http://hdl.handle.net/11094/23132