Edge physics considerations for IBW launch

Journal Article · Tue Apr 01 04:00:00 EST 1997 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.53357· OSTI ID:664827

Myra, J R; DIppolito, D A; Russell, D A ^[1]; Rogers, J H ^[2]

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1. Lodestar Research Corp., 2400 Central Ave. P-5, Boulder, Colorado 80301 (United States)
2. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)

Models for the edge interactions that occur in various regimes of IBW antenna operation have been developed. At high edge density, it is shown that rf sheath effects are important and give rise to significant power losses (anomalous loading). When the density at the antenna is low, the desired EPW-IBW mode transformation is sensitive to the density gradient scale length, and hence to ponderomotive effects. To treat the low density case, a second order equation describing mode transformation and reflection from the lower hybrid layer has been developed. Strong reflections are shown to occur when the density gradient is steep. Application of this model in the presence of self-consistent ponderomotive density modifications is the subject of a companion paper [1]. {copyright} {ital 1997 American Institute of Physics.}

• Research Organization: Princeton Plasma Physics Laboratory
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76CH03073; FG02-88ER53263; FG03-97ER54392; FG03-93ER54212
• OSTI ID: 664827
• Report Number(s): CONF-9704102--
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 403; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ANTENNAS
BERNSTEIN MODE
MODE CONVERSION
PLASMA HEATING
PLASMA SHEATH
REFLECTION
RF SYSTEMS