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Abstract

Realistic density profiles in the very periphery of tokamak discharges have been considered in the study of lower hybrid wave coupling by a waveguide array (grill). The density profile is assumed to be exponential in the scrape-off region up to the limiter radius and then linear. The effect of a sharp density gradient or of a density discontinuity at the limiter radius is discussed. It is shown that these effects lead to a strong modification of the transmission coefficient which can be optimized by adjusting the grill mouth position.

Additional information

Authors: ROMANELLI F, CENTRO RICERCHE ENERGIA FRASCATI (ITALY);SANTINI F CENTRO RICERCHE ENERGIA FRASCATI (ITALY), CENTRO RICERCHE ENERGIA FRASCATI (ITALY)
Bibliographic Reference: NUCLEAR FUSION, VOL. 24 (1984), NO. 2, PP. 219-244
Record Number: 1989122085000 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en