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Author Nelson, S. D. ♦ Reitter, T. ♦ Caplan, M. ♦ Moeller, C.
Sponsorship USDOE
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PLASMA PHYSICS AND FUSION ♦ ECR HEATING ♦ RF SYSTEMS ♦ TOKAMAK DEVICES ♦ HOT PLASMA ♦ GHZ RANGE 100-1000 ♦ WINDOWS ♦ COOLING SYSTEMS ♦ DESIGN ♦ STRESS ANALYSIS ♦ POWER TRANSMISSION ♦ TIME DOMAIN ANALYSIS
Abstract The sectional high-frequency internally-cooled window, as proposed by General Atomics(1), has unique potential for allowing microwave sources to reach multi-megawatt CW levels with application to ECRH. Designs are being investigated using computational electromagnetic (EM), thermal, and mechanical codes at 110 GHz and 170 GHz to examine the design tradeoffs between RF performance and thermal mechanical safety margins. The EM analyses are for the window, under vacuum at one MW and includes variations in the shapes of the cooling fins, the surface treatment of the window elements themselves, the cooling fin tip treatment, the window pitch angle, and the waveguide effects. One advantage of the distributed cooled window is it{close_quote}s extensibility to higher power levels. Results in the modeling efforts are presented showing the EM field concentrations (which then will feed into the thermal analysis), the energy scattering/reflection, the transmitted launch angle variation as a function of physical geometry, and the spatial energy distribution and loss as a function of time and position. {copyright} {ital 1996 American Institute of Physics.}
ISSN 0094243X
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-02-01
Publisher Department Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publisher Place United States
Volume Number 355
Issue Number 1
Technical Publication No. CONF-9505105-
Organization Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)


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