Grid-Controlled Extraction of Low-Charged Ions from a Laser Ion Source
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概要
- 論文の詳細を見る
We developed a grid-controlled laser ion source using a KrF excimer laser and investigated the effects of grid-controlled extraction on beam current waveform and beam quality. By using grid-controlled extraction in the over-dense regime, the beam current waveform was found to be stabilized. The beam current increased in proportion to $V^{3/2}$, where $V$ is the extraction voltage, which proves that the grid control worked properly and that the ion beam was extracted in a one-dimensional space-charge-limited mode. Beam quality measurement using a pepper-pot imaging method revealed that the beam optics was strongly disturbed by the grid potential in the source-limit regime. Conversely, in the over-dense regime there were no deleterious effects of the grid bias on the beam patterns. This result indicated that the virtual anode in the gap acted as a kind of momentum filter and improved the beam quality.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2003-08-15
著者
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Nakajima Mitsuo
Department Of Energy Sciences Interdisciplinary Graduate School Of Science And Engineering Tokyo Ins
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Horioka Kazuhiko
Department Of Energy Sciences Interdisciplinary Graduate School At Suzukakedai Tokyo Institute Of Te
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HASEGAWA Jun
Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology
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KWAN Joe
Lawrence Berkeley National Laboratory
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OGURI Yoshiyuki
Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology
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Ogawa Masao
Research Laboratory For Nuclear Reactors Tokyo Institute Of Technology
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Yoshida Masahiro
Research Department Mitsubishi Motors Corporation
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Ogawa Masao
Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, 2-12-1, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan
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Horioka Kazuhiko
Department of Energy Sciences, Tokyo Institute of Technology, Nagatsuta 4259, Midori-ku, Yokohama, 226-8502, Japan
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Kwan Joe
Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA
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Hasegawa Jun
Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, 2-12-1, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan
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Yoshida Masahiro
Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, 2-12-1, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan
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Oguri Yoshiyuki
Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, 2-12-1, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan
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