Bunching of radioactive ion beam in the millisecond region - a pulsed gating-potential method in an ion source for on-line isotope separation

Y. Shirakabe, Nobuo Ikeda, S. Ohkawa, T. Nomura, T. Shinozuka

研究成果: ジャーナルへの寄稿記事

14 引用 (Scopus)

抄録

A simple method of bunching radioactive ion beam in the millisecond region has been studied using an isotope separator on-line (ISOL). By applying positive and negative potential alternately between the exit hole of a surface ionizer of the ISOL and an electrode set 1 mm apart from it, we have observed clear bunching effects for alkali elements having relatively high ionization efficiencies. The bunching efficiency defined as intensity ratio of the bunched beam to the usual DC beam was found to increase with the increase of repetition rate of the applied alternate potential; for example, at the duty factor of 20%, the bunching efficiencies for 39K, 23Na and 7Li ions were respectively 0.45, 0.25 and 0.23 at 50 Hz, 0.78, 0.32 and 0.27 at 200 Hz and 1, 0.59 and 0.42 at 1 kHz. The in-beam measurement using the 40Ca (3He, αp)38K reaction showed nearly the same magnitude of the bunching effects as in the case of 39K.

元の言語英語
ページ(範囲)11-15
ページ数5
ジャーナルNuclear Inst. and Methods in Physics Research, A
337
発行部数1
DOI
出版物ステータス出版済み - 12 15 1993
外部発表Yes

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isotope separation
bunching
Ion sources
ion sources
Ion beams
Isotopes
ion beams
Separators
separators
isotopes
Ionization
ionizers
Electrodes
Ions
alkalies
repetition
direct current
ionization
electrodes
ions

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Instrumentation

これを引用

Bunching of radioactive ion beam in the millisecond region - a pulsed gating-potential method in an ion source for on-line isotope separation. / Shirakabe, Y.; Ikeda, Nobuo; Ohkawa, S.; Nomura, T.; Shinozuka, T.

:: Nuclear Inst. and Methods in Physics Research, A, 巻 337, 番号 1, 15.12.1993, p. 11-15.

研究成果: ジャーナルへの寄稿記事

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title = "Bunching of radioactive ion beam in the millisecond region - a pulsed gating-potential method in an ion source for on-line isotope separation",
abstract = "A simple method of bunching radioactive ion beam in the millisecond region has been studied using an isotope separator on-line (ISOL). By applying positive and negative potential alternately between the exit hole of a surface ionizer of the ISOL and an electrode set 1 mm apart from it, we have observed clear bunching effects for alkali elements having relatively high ionization efficiencies. The bunching efficiency defined as intensity ratio of the bunched beam to the usual DC beam was found to increase with the increase of repetition rate of the applied alternate potential; for example, at the duty factor of 20{\%}, the bunching efficiencies for 39K, 23Na and 7Li ions were respectively 0.45, 0.25 and 0.23 at 50 Hz, 0.78, 0.32 and 0.27 at 200 Hz and 1, 0.59 and 0.42 at 1 kHz. The in-beam measurement using the 40Ca (3He, αp)38K reaction showed nearly the same magnitude of the bunching effects as in the case of 39K.",
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T1 - Bunching of radioactive ion beam in the millisecond region - a pulsed gating-potential method in an ion source for on-line isotope separation

AU - Shirakabe, Y.

AU - Ikeda, Nobuo

AU - Ohkawa, S.

AU - Nomura, T.

AU - Shinozuka, T.

PY - 1993/12/15

Y1 - 1993/12/15

N2 - A simple method of bunching radioactive ion beam in the millisecond region has been studied using an isotope separator on-line (ISOL). By applying positive and negative potential alternately between the exit hole of a surface ionizer of the ISOL and an electrode set 1 mm apart from it, we have observed clear bunching effects for alkali elements having relatively high ionization efficiencies. The bunching efficiency defined as intensity ratio of the bunched beam to the usual DC beam was found to increase with the increase of repetition rate of the applied alternate potential; for example, at the duty factor of 20%, the bunching efficiencies for 39K, 23Na and 7Li ions were respectively 0.45, 0.25 and 0.23 at 50 Hz, 0.78, 0.32 and 0.27 at 200 Hz and 1, 0.59 and 0.42 at 1 kHz. The in-beam measurement using the 40Ca (3He, αp)38K reaction showed nearly the same magnitude of the bunching effects as in the case of 39K.

AB - A simple method of bunching radioactive ion beam in the millisecond region has been studied using an isotope separator on-line (ISOL). By applying positive and negative potential alternately between the exit hole of a surface ionizer of the ISOL and an electrode set 1 mm apart from it, we have observed clear bunching effects for alkali elements having relatively high ionization efficiencies. The bunching efficiency defined as intensity ratio of the bunched beam to the usual DC beam was found to increase with the increase of repetition rate of the applied alternate potential; for example, at the duty factor of 20%, the bunching efficiencies for 39K, 23Na and 7Li ions were respectively 0.45, 0.25 and 0.23 at 50 Hz, 0.78, 0.32 and 0.27 at 200 Hz and 1, 0.59 and 0.42 at 1 kHz. The in-beam measurement using the 40Ca (3He, αp)38K reaction showed nearly the same magnitude of the bunching effects as in the case of 39K.

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