Quasi-optical grill launching of lower-hybrid waves for a linearly increasing plasma density

Author

Borghi, Riccardo ; Frezza, Fabrizio ; Gerosa, Giorgio ; Santarsiero, Massimo ; Santini, Carlo ; Schettini, Giuseppe

Author_Institution

Dipartimento di Ingegneria Elettronica, Rome Univ., Italy

Volume

26

Issue

4

fYear

1998

fDate

8/1/1998 12:00:00 AM

Firstpage

1330

Lastpage

1338

Abstract

An analysis of quasi-optical grills for lower-hybrid waves for heating and current drive purposes is presented. The tokamak plasma density versus the abscissa entering the plasma is assumed to behave like a step and a subsequent ramp. The study is performed by means of a two-dimensional formulation employing cylindrical waves. A detailed numerical analysis is presented, which allows us to show results for different configurations useful in practical cases and comparisons with the constant-density case

Keywords

plasma density; plasma hybrid waves; plasma toroidal confinement; abscissa; constant-density case; current drive; cylindrical waves; heating; linearly increasing plasma density; lower-hybrid waves; numerical analysis; quasi-optical grill launching; tokamak; two-dimensional formulation; Associate members; Electromagnetic scattering; Electromagnetic waveguides; Gratings; Heating; Plasma density; Plasma devices; Plasma waves; Surface waves; Tokamaks;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.725166

Filename

725166