### Abstract

Electron acceleration by a localized r.f. field is considered as a mechanism to fill the spectrum gap in lower hybrid current drive (LHCD). A simple one-dimensional model along the magnetic lines of force has been employed. The electron dynamics have been studied by numerically solving the equation of motion in a model localized r.f. field for a given initial distribution of test electrons. Special attention is focused on analyses for the interaction between the r.f. field and the electrons, whose initial velocity is well below the phase velocity of the wave to understand the acceleration mechanism. Moreover, model calculations have been performed using realistic wave parameters (localized width, wave number etc.) for typical LHCD experimental conditions in both medium and large tokamaks to examine whether or not the mechanism considered here is a possible solution to fill the spectrum gap.

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

Pages (from-to) | 351-360 |

Number of pages | 10 |

Journal | Fusion Engineering and Design |

Volume | 26 |

Issue number | 1-4 |

DOIs | |

Publication status | Published - 1995 Jan 1 |

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### ASJC Scopus subject areas

- Nuclear Energy and Engineering
- Civil and Structural Engineering
- Mechanical Engineering
- Materials Science(all)
- Energy Engineering and Power Technology

### Cite this

*Fusion Engineering and Design*,

*26*(1-4), 351-360. https://doi.org/10.1016/0920-3796(94)00201-H

**Electron acceleration by a localized r.f. field and spectrum gap problem in lower hybrid current drive.** / Hatayama, Akiyoshi; Nagasaka, Kenji; Ogasawara, Masatada; Kimura, Koh.

Research output: Contribution to journal › Article

*Fusion Engineering and Design*, vol. 26, no. 1-4, pp. 351-360. https://doi.org/10.1016/0920-3796(94)00201-H

}

TY - JOUR

T1 - Electron acceleration by a localized r.f. field and spectrum gap problem in lower hybrid current drive

AU - Hatayama, Akiyoshi

AU - Nagasaka, Kenji

AU - Ogasawara, Masatada

AU - Kimura, Koh

PY - 1995/1/1

Y1 - 1995/1/1

N2 - Electron acceleration by a localized r.f. field is considered as a mechanism to fill the spectrum gap in lower hybrid current drive (LHCD). A simple one-dimensional model along the magnetic lines of force has been employed. The electron dynamics have been studied by numerically solving the equation of motion in a model localized r.f. field for a given initial distribution of test electrons. Special attention is focused on analyses for the interaction between the r.f. field and the electrons, whose initial velocity is well below the phase velocity of the wave to understand the acceleration mechanism. Moreover, model calculations have been performed using realistic wave parameters (localized width, wave number etc.) for typical LHCD experimental conditions in both medium and large tokamaks to examine whether or not the mechanism considered here is a possible solution to fill the spectrum gap.

AB - Electron acceleration by a localized r.f. field is considered as a mechanism to fill the spectrum gap in lower hybrid current drive (LHCD). A simple one-dimensional model along the magnetic lines of force has been employed. The electron dynamics have been studied by numerically solving the equation of motion in a model localized r.f. field for a given initial distribution of test electrons. Special attention is focused on analyses for the interaction between the r.f. field and the electrons, whose initial velocity is well below the phase velocity of the wave to understand the acceleration mechanism. Moreover, model calculations have been performed using realistic wave parameters (localized width, wave number etc.) for typical LHCD experimental conditions in both medium and large tokamaks to examine whether or not the mechanism considered here is a possible solution to fill the spectrum gap.

UR - http://www.scopus.com/inward/record.url?scp=0029183749&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029183749&partnerID=8YFLogxK

U2 - 10.1016/0920-3796(94)00201-H

DO - 10.1016/0920-3796(94)00201-H

M3 - Article

VL - 26

SP - 351

EP - 360

JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

SN - 0920-3796

IS - 1-4

ER -