### Abstract

A new analytic formula for the figure of merit for beam current drive j/p_{b} is developed in which neoclassical corrections for both ion current and beam induced electron current are incorporated. Small additional correctors for fast ion energy diffusion and charge exchange loss are also introduced. The present formula for j/p_{b} is based on a circular plasma. The formula is, however, also applicable to a non-circular plasma. With this new formula, the value of j/p_{b} can be evaluated without solution of the bounce averaged Fokker-Planck equation. One of the applications of the formula is to use it in a self-consistent current drive analysis in combination with MHD and/or transport analysis. In the paper, the formula is used to investigate the various parametric dependences of j/p_{b}.

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

Pages (from-to) | 423-430 |

Number of pages | 8 |

Journal | Nuclear Fusion |

Volume | 30 |

Issue number | 3 |

DOIs | |

Publication status | Published - 1990 |

Externally published | Yes |

### Fingerprint

### ASJC Scopus subject areas

- Condensed Matter Physics
- Nuclear and High Energy Physics
- Physics and Astronomy(all)

### Cite this

*Nuclear Fusion*,

*30*(3), 423-430. https://doi.org/10.1088/0029-5515/30/3/004

**Neoclassical formula for neutral beam current drive.** / Okano, Kunihiko.

Research output: Contribution to journal › Article

*Nuclear Fusion*, vol. 30, no. 3, pp. 423-430. https://doi.org/10.1088/0029-5515/30/3/004

}

TY - JOUR

T1 - Neoclassical formula for neutral beam current drive

AU - Okano, Kunihiko

PY - 1990

Y1 - 1990

N2 - A new analytic formula for the figure of merit for beam current drive j/pb is developed in which neoclassical corrections for both ion current and beam induced electron current are incorporated. Small additional correctors for fast ion energy diffusion and charge exchange loss are also introduced. The present formula for j/pb is based on a circular plasma. The formula is, however, also applicable to a non-circular plasma. With this new formula, the value of j/pb can be evaluated without solution of the bounce averaged Fokker-Planck equation. One of the applications of the formula is to use it in a self-consistent current drive analysis in combination with MHD and/or transport analysis. In the paper, the formula is used to investigate the various parametric dependences of j/pb.

AB - A new analytic formula for the figure of merit for beam current drive j/pb is developed in which neoclassical corrections for both ion current and beam induced electron current are incorporated. Small additional correctors for fast ion energy diffusion and charge exchange loss are also introduced. The present formula for j/pb is based on a circular plasma. The formula is, however, also applicable to a non-circular plasma. With this new formula, the value of j/pb can be evaluated without solution of the bounce averaged Fokker-Planck equation. One of the applications of the formula is to use it in a self-consistent current drive analysis in combination with MHD and/or transport analysis. In the paper, the formula is used to investigate the various parametric dependences of j/pb.

UR - http://www.scopus.com/inward/record.url?scp=0025404208&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0025404208&partnerID=8YFLogxK

U2 - 10.1088/0029-5515/30/3/004

DO - 10.1088/0029-5515/30/3/004

M3 - Article

AN - SCOPUS:0025404208

VL - 30

SP - 423

EP - 430

JO - Nuclear Fusion

JF - Nuclear Fusion

SN - 0029-5515

IS - 3

ER -