Multi-Species Ion Acceleration in Expansion of Finite-Size Plasma Targets
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概要
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We investigate ion energy spectra of a droplet target composed of different ion species, which is assumed to be heated by ultrashort laser pulse. The dynamics is studied with three-dimensional particle-in-cell simulation. It is found that the maximum ion energy Ei,max of the ion species with a charge a state Z has proportionality, Ei,max ∝ Z2 , when multi-species ions exist in large quantities simultaneously. This is a crucial new result different from the scaling Ei,max ∝ Z, where the fraction of such contaminating ions is small compared with that of the background ions. We discuss this present numerical result by comparing with a self-similar solution, which takes a full account of the charge separation effect.
- 社団法人 プラズマ・核融合学会の論文
著者
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Murakami Masakatsu
Institute for Materials Research
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Nishihara Katsunobu
Institue Of Laser Engineering Osaka University
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Nunami Masanori
Institute For Theoretical Physics Kanazawa University
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MURAKAMI Masakatsu
Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
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YE Peiyong
Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
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TAKATA Akira
Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
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YE Peiyong
Institute of Laser Engineering, Osaka University
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NISHIHARA Katsunobu
Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
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