Impurity sources during lower hybrid heating on Alcator

Autor:	S. Texter, J. E. Rice, A.S. Wan, H.L. Manning, Yuichi Takase, S. F. Knowlton, E.S. Marmar, Bruce Lipschultz, Brian LaBombard, Miklos Porkolab, J.L. Terry
Rok vydání:	1986
Předmět:	Nuclear and High Energy Physics Tokamak Materials science Silicon chemistry.chemical_element Plasma Condensed Matter Physics Lower hybrid oscillation law.invention Heat flux chemistry law Sputtering Impurity Limiter Atomic physics
Zdroj:	Nuclear Fusion. 26:1463-1474
ISSN:	1741-4326 0029-5515
DOI:	10.1088/0029-5515/26/11/002
Popis:	Impurity source mechanisms which appear during the heating of the Alcator C tokamak by injection of lower hybrid frequency waves are described. Silicon is a dominant impurity in these experiments where SiC was the limiter surface material. At low values of injected power, the silicon source rate is dominated by physical sputtering. As the amount of injected power is raised, evaporation caused by the tail electron heat flux to the limiter becomes the primary source for impurities entering the plasma. Measurements of silicon line emission from the plasma as well as other central and edge parameters are presented as functions of injected radiofrequency power.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2af5ca404e0187365fc0c3e6ef1e11e2 https://doi.org/10.1088/0029-5515/26/11/002 Zobrazit plný text záznamu