摘要
Employing Hamiltonian mechanics, the transport of fusion born alpha particles in the presence of driftwave turbulence is investigated. An analytical turbulence model based on the toroidal drift eigenmode is employed for guiding center orbit-following calculations. It is shown that high energy particles are less susceptible to driftwave turbulence. The passing particle transport is due to overlapping of guiding center electric islands whose widths are inversely proportional to the square root of the parallel velocity. For trapped particles, through a coordinate transformation from the poloidal angle and the parallel velocity to the action-angle variables, the resonance between the bounce motion and the toroidal precession motion, which can cause secondary island formation in the phase space, is demonstrated.
| 原文 | English |
|---|---|
| 文章編號 | 073016 |
| 期刊 | Nuclear Fusion |
| 卷 | 55 |
| 發行號 | 7 |
| DOIs | |
| 出版狀態 | Published - 2015 七月 1 |
指紋
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Condensed Matter Physics
引用此文
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Alpha particle transport in the presence of ballooning type electrostatic driftwaves. / Nishimura, Y.; Huang, B.; Cheng, C. Z.
於: Nuclear Fusion, 卷 55, 編號 7, 073016, 01.07.2015.研究成果: Article
TY - JOUR
T1 - Alpha particle transport in the presence of ballooning type electrostatic driftwaves
AU - Nishimura, Y.
AU - Huang, B.
AU - Cheng, C. Z.
PY - 2015/7/1
Y1 - 2015/7/1
N2 - Employing Hamiltonian mechanics, the transport of fusion born alpha particles in the presence of driftwave turbulence is investigated. An analytical turbulence model based on the toroidal drift eigenmode is employed for guiding center orbit-following calculations. It is shown that high energy particles are less susceptible to driftwave turbulence. The passing particle transport is due to overlapping of guiding center electric islands whose widths are inversely proportional to the square root of the parallel velocity. For trapped particles, through a coordinate transformation from the poloidal angle and the parallel velocity to the action-angle variables, the resonance between the bounce motion and the toroidal precession motion, which can cause secondary island formation in the phase space, is demonstrated.
AB - Employing Hamiltonian mechanics, the transport of fusion born alpha particles in the presence of driftwave turbulence is investigated. An analytical turbulence model based on the toroidal drift eigenmode is employed for guiding center orbit-following calculations. It is shown that high energy particles are less susceptible to driftwave turbulence. The passing particle transport is due to overlapping of guiding center electric islands whose widths are inversely proportional to the square root of the parallel velocity. For trapped particles, through a coordinate transformation from the poloidal angle and the parallel velocity to the action-angle variables, the resonance between the bounce motion and the toroidal precession motion, which can cause secondary island formation in the phase space, is demonstrated.
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U2 - 10.1088/0029-5515/55/7/073016
DO - 10.1088/0029-5515/55/7/073016
M3 - Article
AN - SCOPUS:84934324942
VL - 55
JO - Nuclear Fusion
JF - Nuclear Fusion
SN - 0029-5515
IS - 7
M1 - 073016
ER -