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- Yoshiro Nakagawa
- Research Institute for Atomic Energy, Osaka City University, Osaka 558, Japan
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- Tamotsu Enomoto
- Department of Electrical Engineering, Faculty of Engineering, Osaka City University, Osaka 558, Japan
抄録
<jats:p>An intense pulsed ion beam (≳50 keV, ∼80 A/cm2, and ∼400 ns pulse length) from a magnetically insulated ion diode was injected axially into a strong magnetic field (up to 2.2 T). This long pulse, high-density proton beam was efficiently guided and compressed (2r=6.0 cm to 2r≲2.0 cm) by the magnetic field. The current density at the center of a beam under a maximum magnetic field (40 cm from the diode) was increased by a factor of 4 (up to 320 A/cm2). The beam radius, calculated by the snow-plow model, indicated that a more effective compression could be obtained by a strong magnetic field under ideal conditions. The observed large beam radius, compared with the radius expected from the model, could be attributed mainly to field penetration into the beam radius since the skin depth of the ion beam (c/ωp ∼0.4 cm) was not much smaller than the radius of the initial beam (r0 ∼3 cm). By applying a magnetic field that was greater than 0.8 T, the ion beam was propagated 50 cm without loss.</jats:p>
収録刊行物
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- Journal of Applied Physics
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Journal of Applied Physics 61 (2), 470-475, 1987-01-15
AIP Publishing
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詳細情報 詳細情報について
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- CRID
- 1360298344426860928
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- DOI
- 10.1063/1.338246
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- ISSN
- 10897550
- 00218979
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- データソース種別
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- Crossref