| Project/Area Number |
23244110
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Plasma science
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| Research Institution | Yokohama National University |
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Principal Investigator |
ISHIHARA Osamu 横浜国立大学, 工学研究院, 教授 (20313463)
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| Co-Investigator(Renkei-kenkyūsha) |
SAITOU Yoshifumi 宇都宮大学, 工学部, 助教 (70251080)
SHINDO Masako 横浜国立大学, 工学研究院, 特別研究教員 (10345481)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥44,590,000 (Direct Cost: ¥34,300,000、Indirect Cost: ¥10,290,000)
Fiscal Year 2013: ¥11,700,000 (Direct Cost: ¥9,000,000、Indirect Cost: ¥2,700,000)
Fiscal Year 2012: ¥13,650,000 (Direct Cost: ¥10,500,000、Indirect Cost: ¥3,150,000)
Fiscal Year 2011: ¥19,240,000 (Direct Cost: ¥14,800,000、Indirect Cost: ¥4,440,000)
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| Keywords | コンプレックスプラズマ / ダスト / プラズマ / 微粒子 / 集団運動 / 相互作用 / 構造形成 / 渦 / 液体ヘリウム |
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| Research Abstract |
Dust particles of micron size are negatively charged in a plasma and are confined in a plasma to remain charge neutral as a system. Dust particles can be suspended in a plasma by the balance of sheath electric force and gravity, and are visible through the scattering of laser light applied from the outside of the chamber. Novel structures of dust particles are observed, including the low-dimensional structures in a cryogenic plasma, two-dimensional structures formed in a horizontal plane of the sheath, and collective oscillations with extremely low frequency. The bow shock pattern is realized by dust particles, which helps to understand the basic structures of planetary bow shock. The vortex and mass ejection are observed in the application of strong magnetic field. On the other hand, the double helical structure found in a simulation gives a platform to understand the helix commonly observed in DNA. In conclusion, our research on complex plasma opened a new field in a plasma physics.
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