Design and analysis of first mirror plasma cleaning electrical circuit for Edge Thomson scattering ITER diagnostics

Ulf Stephan,Olaff Steinke,Andrey Ushakov,Ad Verlaan,Eiichi Yatsuka,Masahito Yokoyama,Andre Rijfers,Diogo Ribeiro,Lucas Moser,Michele Bassan,Matthew P. Maniscalco,Erik van Beekum,Takaki Hatae

Fusion Engineering and Design（2022）

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摘要

•Modeling includes RF electrical circuit for ETS First Mirror plasma cleaning.•Compact vacuum notch-filter structure is considered for several frequencies.•Matching with a passive vacuum pre-matcher suits low plasma impedances.•Plasma impedance is measured in a representative geometry in helium and argon plasma.•Generator power of 1 kW may be needed to produce sufficient ion flux in cleaning plasma.

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关键词

Edge Thomson scattering,ITER diagnostics,First mirror,Plasma cleaning,Radio-frequency discharges,RF cables,Vacuum,Notch filter

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