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Title First demonstration of a traveling wave antenna in a tokamak and relevance to the JFT-2M combline
Creator/Author Phelps, D.A. ; Moeller, C.P. ; Ikezi, H. ; Chiu, S.C.
Publication Date1995 Jun 01
OSTI IdentifierOSTI ID: 100031; Legacy ID: DE95015929
Report Number(s)GA-A--22051; CONF-9505105--13
DOE Contract NumberAC03-89ER51114
Other Number(s)Other: ON: DE95015929
Resource TypeConference
Resource RelationConference: 11. topical conference on radio frequency in plasmas, Palm Springs, CA (United States), 17-19 May 1995; Other Information: PBD: Jun 1995
Research OrgGeneral Atomics, San Diego, CA (United States)
Sponsoring OrgUSDOE, Washington, DC (United States)
Subject70 PLASMA PHYSICS AND FUSION; JFT-2M TOKAMAK; ANTENNAS; PLASMA; TOKAMAK DEVICES; TRAVELLING WAVES
Description/AbstractFirst observations of a traveling wave antenna (TWA) in a tokamak are reported. For a fractional bandwidth ({delta}{omega}/{omega}) of about 20%, TWA experiments using a four-element antenna in DIII-D showed less than 1% reflected power and excellent stability of the phase velocity of the launched wave -- even during giant ELMs. The power radiated into the plasma varied from about 40% during ELM-free H-mode to almost 90% during L-mode and ELMing H-mode. Theoretical modeling validated by these low power observations is used to predict the plasma load resistance of a high power combline being built for JFT-2M.
Country of PublicationUnited States
LanguageEnglish
FormatMedium: P; Size: 4 p.
Availability INIS; OSTI as DE95015929
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System Entry Date2008 Feb 04
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