Scattering of radio frequency waves by blob-filaments
- Lodestar Research Corp., 2400 Central Ave. P-5, Boulder, Colorado 80301 (United States)
Radio frequency waves used for heating and current drive in magnetic confinement experiments must traverse the scrape-off-layer (SOL) and edge plasma before reaching the core. The edge and SOL plasmas are strongly turbulent and intermittent in both space and time. As a first approximation, the SOL can be treated as a tenuous background plasma upon which denser filamentary field-aligned blobs of plasma are superimposed. The blobs are approximately stationary on the rf time scale. The scattering of plane waves in the ion-cyclotron to lower-hybrid frequency range from a cylindrical blob is treated here in the cold plasma fluid model. Scattering widths are derived for incident fast and slow waves, and the scattered power fraction is estimated. Processes such as scattering-induced mode conversion, scattering resonances, and shadowing are investigated.
- OSTI ID:
- 21421266
- Journal Information:
- Physics of Plasmas, Vol. 17, Issue 10; Other Information: DOI: 10.1063/1.3499670; (c) 2010 American Institute of Physics; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Interaction of radio frequency waves with cylindrical density filaments -- scattering and radiation pressure
Interaction of radio frequency waves with cylindrical density filaments: scattering and radiation pressure