### Abstract

A banana kinetic equation in tokamaks that includes effects of the finite banana width is derived for the electromagnetic waves with frequencies lower than the gyro-frequency and the bounce frequency of the trapped particles. The radial wavelengths are assumed to be either comparable to or shorter than the banana width, but much wider than the gyro-radius. One of the consequences of the banana kinetics is that the parallel component of the vector potential is not annihilated by the orbit averaging process and appears in the banana kinetic equation. The equation is solved to calculate the neoclassical quasilinear transport fluxes in the superbanana plateau regime caused by electromagnetic waves. The transport fluxes can be used to model electromagnetic wave and the chaotic magnetic field induced thermal particle or energetic alpha particle losses in tokamaks. It is shown that the parallel component of the vector potential enhances losses when it is the sole transport mechanism. In particular, the fact that the drift resonance can cause significant transport losses in the chaotic magnetic field in the hitherto unknown low collisionality regimes is emphasized.

Original language | English |
---|---|

Article number | 032501 |

Journal | Physics of Plasmas |

Volume | 25 |

Issue number | 3 |

DOIs | |

Publication status | Published - 2018 Mar 1 |

### Fingerprint

### All Science Journal Classification (ASJC) codes

- Condensed Matter Physics

### Cite this

*Physics of Plasmas*,

*25*(3), [032501]. https://doi.org/10.1063/1.5021473

}

*Physics of Plasmas*, vol. 25, no. 3, 032501. https://doi.org/10.1063/1.5021473

**Electromagnetic banana kinetic equation and its applications in tokamaks.** / Shaing, K. C.; Chu, M. S.; Sabbagh, S. A.; Seol, J.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Electromagnetic banana kinetic equation and its applications in tokamaks

AU - Shaing, K. C.

AU - Chu, M. S.

AU - Sabbagh, S. A.

AU - Seol, J.

PY - 2018/3/1

Y1 - 2018/3/1

N2 - A banana kinetic equation in tokamaks that includes effects of the finite banana width is derived for the electromagnetic waves with frequencies lower than the gyro-frequency and the bounce frequency of the trapped particles. The radial wavelengths are assumed to be either comparable to or shorter than the banana width, but much wider than the gyro-radius. One of the consequences of the banana kinetics is that the parallel component of the vector potential is not annihilated by the orbit averaging process and appears in the banana kinetic equation. The equation is solved to calculate the neoclassical quasilinear transport fluxes in the superbanana plateau regime caused by electromagnetic waves. The transport fluxes can be used to model electromagnetic wave and the chaotic magnetic field induced thermal particle or energetic alpha particle losses in tokamaks. It is shown that the parallel component of the vector potential enhances losses when it is the sole transport mechanism. In particular, the fact that the drift resonance can cause significant transport losses in the chaotic magnetic field in the hitherto unknown low collisionality regimes is emphasized.

AB - A banana kinetic equation in tokamaks that includes effects of the finite banana width is derived for the electromagnetic waves with frequencies lower than the gyro-frequency and the bounce frequency of the trapped particles. The radial wavelengths are assumed to be either comparable to or shorter than the banana width, but much wider than the gyro-radius. One of the consequences of the banana kinetics is that the parallel component of the vector potential is not annihilated by the orbit averaging process and appears in the banana kinetic equation. The equation is solved to calculate the neoclassical quasilinear transport fluxes in the superbanana plateau regime caused by electromagnetic waves. The transport fluxes can be used to model electromagnetic wave and the chaotic magnetic field induced thermal particle or energetic alpha particle losses in tokamaks. It is shown that the parallel component of the vector potential enhances losses when it is the sole transport mechanism. In particular, the fact that the drift resonance can cause significant transport losses in the chaotic magnetic field in the hitherto unknown low collisionality regimes is emphasized.

UR - http://www.scopus.com/inward/record.url?scp=85042873289&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85042873289&partnerID=8YFLogxK

U2 - 10.1063/1.5021473

DO - 10.1063/1.5021473

M3 - Article

AN - SCOPUS:85042873289

VL - 25

JO - Physics of Plasmas

JF - Physics of Plasmas

SN - 1070-664X

IS - 3

M1 - 032501

ER -