# Neoclassical transport of energetic minority tail ions generated by ion-cyclotron resonance heating in tokamak geometry

## Abstract

Neoclassical transport of energetic minority tail ions, which are generated by high powered electromagnetic waves of the Ion Cyclotron Range of Frequencies (ICRF) at the fundamental harmonic resonance, is studied analytically in tokamak geometry. The effect of Coulomb collisions on the tail ion transport is investigated in the present work. The total tail ion transport will be the sum of the present collision-driven transport and the wave-driven transport, which is due to the ICRF-wave scattering of the tail particles as reported in the literature. The transport coefficients have been calculated kinetically, and it is found that the large tail ion viscosity, driven by the localized ICRF-heating and Coulomb slowing-down collisions, induces purely convective particle transport of the tail species, while the energy transport is both convective and diffusive. The rate of radial particle transport is shown to be usually small, but the rate of radial energy transport is larger and may not be negligible compared to the Coulomb slowing-down rate. 18 refs., 2 figs.

- Authors:

- (New York Univ., NY (USA). Courant Inst. of Mathematical Sciences)
- (Princeton Univ., NJ (USA). Plasma Physics Lab.)

- Publication Date:

- Research Org.:
- Princeton Univ., NJ (USA). Plasma Physics Lab.

- Sponsoring Org.:
- DOE/ER

- OSTI Identifier:
- 5007006

- Report Number(s):
- PPPL-2662

ON: DE90005803; TRN: 90-004653

- DOE Contract Number:
- AC02-76CH03073

- Resource Type:
- Technical Report

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ICR HEATING; NEOCLASSICAL TRANSPORT THEORY; TOKAMAK DEVICES; ANGULAR MOMENTUM; COULOMB SCATTERING; DISTRIBUTION FUNCTIONS; ENERGY TRANSPORT; KINETIC EQUATIONS; MAGNETIC FIELDS; BASIC INTERACTIONS; CLOSED PLASMA DEVICES; ELASTIC SCATTERING; ELECTROMAGNETIC INTERACTIONS; EQUATIONS; FUNCTIONS; HEATING; HIGH-FREQUENCY HEATING; INTERACTIONS; PLASMA HEATING; SCATTERING; THERMONUCLEAR DEVICES; TRANSPORT THEORY; 700101* - Fusion Energy- Plasma Research- Confinement, Heating, & Production; 700103 - Fusion Energy- Plasma Research- Kinetics

### Citation Formats

```
Chang, C.S., Hammett, G.W., and Goldston, R.J.
```*Neoclassical transport of energetic minority tail ions generated by ion-cyclotron resonance heating in tokamak geometry*. United States: N. p., 1990.
Web. doi:10.2172/5007006.

```
Chang, C.S., Hammett, G.W., & Goldston, R.J.
```*Neoclassical transport of energetic minority tail ions generated by ion-cyclotron resonance heating in tokamak geometry*. United States. doi:10.2172/5007006.

```
Chang, C.S., Hammett, G.W., and Goldston, R.J. Mon .
"Neoclassical transport of energetic minority tail ions generated by ion-cyclotron resonance heating in tokamak geometry". United States.
doi:10.2172/5007006. https://www.osti.gov/servlets/purl/5007006.
```

```
@article{osti_5007006,
```

title = {Neoclassical transport of energetic minority tail ions generated by ion-cyclotron resonance heating in tokamak geometry},

author = {Chang, C.S. and Hammett, G.W. and Goldston, R.J.},

abstractNote = {Neoclassical transport of energetic minority tail ions, which are generated by high powered electromagnetic waves of the Ion Cyclotron Range of Frequencies (ICRF) at the fundamental harmonic resonance, is studied analytically in tokamak geometry. The effect of Coulomb collisions on the tail ion transport is investigated in the present work. The total tail ion transport will be the sum of the present collision-driven transport and the wave-driven transport, which is due to the ICRF-wave scattering of the tail particles as reported in the literature. The transport coefficients have been calculated kinetically, and it is found that the large tail ion viscosity, driven by the localized ICRF-heating and Coulomb slowing-down collisions, induces purely convective particle transport of the tail species, while the energy transport is both convective and diffusive. The rate of radial particle transport is shown to be usually small, but the rate of radial energy transport is larger and may not be negligible compared to the Coulomb slowing-down rate. 18 refs., 2 figs.},

doi = {10.2172/5007006},

journal = {},

number = ,

volume = ,

place = {United States},

year = {Mon Jan 01 00:00:00 EST 1990},

month = {Mon Jan 01 00:00:00 EST 1990}

}