### 抄録

We investigate and calculate particle orbits and the effect of particle orbits on plasma current density for nonrelativistic resonance condition in the present RF-driven divertor plasma on QUEST. We surveyed particle orbits for different values of parallel refractive index, particle initial positions and pitch angles on fundamental and second harmonic resonance conditions. We observed that for fundamental harmonic resonance condition when particle orbits are plotted on the poloidal cross-section for positive values of parallel refractive index, these orbits are started from the resonance surface and produced their orbits around the LCFS (Large Closed Flux Surface). These orbits carry positive current. When particle orbits are plotted for negative values of parallel refractive index, these orbits are started from resonance surface, but remained at the inside of the LCFS. These orbits carry negative current that reduced the overall plasma current. For second harmonic resonance condition when particle orbits are plotted on the poloidal cross-section most of the orbits remained in inside the LCFS and carry positive current. When we consider the value of parallel refractive index-0.4 and +0.4 some particle orbits arrived at the limiter and become lost particles. On the other hand, when we consider particle initial positions 0.16 m or more vertically far from the mid plane some banana orbits are produced. These banana orbits make the current density profile maximum at low field side region. From this calculation we got a hollow current density profile with current density peak at the low field side region outside of the LCFS. From this calculation we can infer that parabolic current density profile is possible, if we set the resonance surface outside of the magnetic axis by increasing the toroidal magnetic field coil current and make the plasma position inward by increasing vertical field coil current.

元の言語 | 英語 |
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ホスト出版物のタイトル | 2015 IEEE 26th Symposium on Fusion Engineering, SOFE 2015 |

出版者 | Institute of Electrical and Electronics Engineers Inc. |

ISBN（電子版） | 9781479982646 |

DOI | |

出版物ステータス | 出版済み - 5 31 2016 |

イベント | 26th IEEE Symposium on Fusion Engineering, SOFE 2015 - Austin, 米国 継続期間: 5 31 2015 → 6 4 2015 |

### 出版物シリーズ

名前 | Proceedings - Symposium on Fusion Engineering |
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巻 | 2016-May |

### その他

その他 | 26th IEEE Symposium on Fusion Engineering, SOFE 2015 |
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国 | 米国 |

市 | Austin |

期間 | 5/31/15 → 6/4/15 |

### Fingerprint

### All Science Journal Classification (ASJC) codes

- Nuclear and High Energy Physics
- Nuclear Energy and Engineering

### これを引用

*2015 IEEE 26th Symposium on Fusion Engineering, SOFE 2015*[7482308] (Proceedings - Symposium on Fusion Engineering; 巻数 2016-May). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/SOFE.2015.7482308

**Current density calculation from particle orbit in RF-driven divertor plasma on QUEST.** / Alam, Md Mahbub; Nakamura, Kazuo; Hasegawa, Makoto; Tokunaga, Kazutoshi; Araki, Kuniaki; Zushi, Hideki; Hanada, Kazuaki; Fujisawa, Akihide; Idei, Hiroshi; Nagashima, Yoshihiko; Kawasaki, Shoji; Nakashima, Hisatoshi; Higashijima, Aki; Xia, Fan; Mitarai, Osamu.

研究成果: 著書/レポートタイプへの貢献 › 会議での発言

*2015 IEEE 26th Symposium on Fusion Engineering, SOFE 2015.*, 7482308, Proceedings - Symposium on Fusion Engineering, 巻. 2016-May, Institute of Electrical and Electronics Engineers Inc., 26th IEEE Symposium on Fusion Engineering, SOFE 2015, Austin, 米国, 5/31/15. https://doi.org/10.1109/SOFE.2015.7482308

}

TY - GEN

T1 - Current density calculation from particle orbit in RF-driven divertor plasma on QUEST

AU - Alam, Md Mahbub

AU - Nakamura, Kazuo

AU - Hasegawa, Makoto

AU - Tokunaga, Kazutoshi

AU - Araki, Kuniaki

AU - Zushi, Hideki

AU - Hanada, Kazuaki

AU - Fujisawa, Akihide

AU - Idei, Hiroshi

AU - Nagashima, Yoshihiko

AU - Kawasaki, Shoji

AU - Nakashima, Hisatoshi

AU - Higashijima, Aki

AU - Xia, Fan

AU - Mitarai, Osamu

PY - 2016/5/31

Y1 - 2016/5/31

N2 - We investigate and calculate particle orbits and the effect of particle orbits on plasma current density for nonrelativistic resonance condition in the present RF-driven divertor plasma on QUEST. We surveyed particle orbits for different values of parallel refractive index, particle initial positions and pitch angles on fundamental and second harmonic resonance conditions. We observed that for fundamental harmonic resonance condition when particle orbits are plotted on the poloidal cross-section for positive values of parallel refractive index, these orbits are started from the resonance surface and produced their orbits around the LCFS (Large Closed Flux Surface). These orbits carry positive current. When particle orbits are plotted for negative values of parallel refractive index, these orbits are started from resonance surface, but remained at the inside of the LCFS. These orbits carry negative current that reduced the overall plasma current. For second harmonic resonance condition when particle orbits are plotted on the poloidal cross-section most of the orbits remained in inside the LCFS and carry positive current. When we consider the value of parallel refractive index-0.4 and +0.4 some particle orbits arrived at the limiter and become lost particles. On the other hand, when we consider particle initial positions 0.16 m or more vertically far from the mid plane some banana orbits are produced. These banana orbits make the current density profile maximum at low field side region. From this calculation we got a hollow current density profile with current density peak at the low field side region outside of the LCFS. From this calculation we can infer that parabolic current density profile is possible, if we set the resonance surface outside of the magnetic axis by increasing the toroidal magnetic field coil current and make the plasma position inward by increasing vertical field coil current.

AB - We investigate and calculate particle orbits and the effect of particle orbits on plasma current density for nonrelativistic resonance condition in the present RF-driven divertor plasma on QUEST. We surveyed particle orbits for different values of parallel refractive index, particle initial positions and pitch angles on fundamental and second harmonic resonance conditions. We observed that for fundamental harmonic resonance condition when particle orbits are plotted on the poloidal cross-section for positive values of parallel refractive index, these orbits are started from the resonance surface and produced their orbits around the LCFS (Large Closed Flux Surface). These orbits carry positive current. When particle orbits are plotted for negative values of parallel refractive index, these orbits are started from resonance surface, but remained at the inside of the LCFS. These orbits carry negative current that reduced the overall plasma current. For second harmonic resonance condition when particle orbits are plotted on the poloidal cross-section most of the orbits remained in inside the LCFS and carry positive current. When we consider the value of parallel refractive index-0.4 and +0.4 some particle orbits arrived at the limiter and become lost particles. On the other hand, when we consider particle initial positions 0.16 m or more vertically far from the mid plane some banana orbits are produced. These banana orbits make the current density profile maximum at low field side region. From this calculation we got a hollow current density profile with current density peak at the low field side region outside of the LCFS. From this calculation we can infer that parabolic current density profile is possible, if we set the resonance surface outside of the magnetic axis by increasing the toroidal magnetic field coil current and make the plasma position inward by increasing vertical field coil current.

UR - http://www.scopus.com/inward/record.url?scp=84978891247&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84978891247&partnerID=8YFLogxK

U2 - 10.1109/SOFE.2015.7482308

DO - 10.1109/SOFE.2015.7482308

M3 - Conference contribution

AN - SCOPUS:84978891247

T3 - Proceedings - Symposium on Fusion Engineering

BT - 2015 IEEE 26th Symposium on Fusion Engineering, SOFE 2015

PB - Institute of Electrical and Electronics Engineers Inc.

ER -