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Production and Electron Heating of Over‐Dense Plasmas by 2.45 GHz Electron Bernstein Waves on CHS
Author(s) -
Ikeda R.,
Igami H.,
Toi K.,
Kubo S.,
Takeuchi M.,
Suzuki C.,
Shoji T.,
Shimozuma T.,
Yoshimura Y.,
Takahashi H.,
Mutoh T.
Publication year - 2010
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.200900035
Subject(s) - plasma , microwave , cyclotron , electron , deposition (geology) , electron cyclotron resonance , atomic physics , ray tracing (physics) , physics , computational physics , magnetic field , electron temperature , materials science , optics , nuclear physics , geology , paleontology , quantum mechanics , sediment
Abstract Production and heating of over‐dense plasmas by 2.45 GHz microwave system under very low field condition was performed and demonstrated on CHS. In this experiment, microwave systems were arranged to aim at taking place mode conversion of launched electron cyclotron wave effectively into electron Bernstein wave (EBW). The power deposition profiles in produced over‐dense plasmas were measured directly by using power modulation technique at various magnetic configurations. The power deposition took place dominantly in overdense region. To clarify wave trajectories, power absorption mechanism and mode conversion, a numerical analysis by a ray‐tracing method was performed. Calculated ray‐trajectories accessed to the region where the experimentally obtained deposition profile has a peak (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)