Electron Bernstein wave research on the national spherical torus experiment

G. Taylor, A. Bers, T. S. Bigelow, M. D. Carter, J. B. Caughman, J. Decker, S. Diem, P. C. Efthimion, N. M. Ershov, E. Fredd, R. W. Harvey, J. Hosea, F. Jaeger, J. Preinhaelter, A. K. Ram, D. A. Rasmussen, A. P. Smirnov, J. B. Wilgen, J. R. Wilson

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    Abstract

    Off-axis electron Bernstein wave current drive (EBWCD) may be critical for sustaining non-inductive high β NSTX plasmas. Modeling results predict that the ∼ 100 kA of off-axis current needed to stabilize a solenoid-free high β NSTX plasma could be generated by by 3 MW of 28 GHz EBW power. Synergy with the bootstrap current may enhance CD efficiency by ∼ 10%. EBW radiometry measurements on NSTX support coupling to EBWs by launching elliptically polarized electromagnetic waves oblique to the confining magnetic field. Plans are being developed to implement a 1 MW, 28 GHz proof-of-principle EBWCD system to test the EBW coupling, heating and CD physics at high rf power densities on NSTX.

    Original languageEnglish
    Title of host publicationRADIO FREQUENCY POWER IN PLASMAS
    Subtitle of host publication16th Topical Conference on Radio Frequency Power in Plasmas
    Pages337-340
    Number of pages4
    DOIs
    StatePublished - Sep 26 2005
    EventRADIO FREQUENCY POWER IN PLASMAS: 16th Topical Conference on Radio Frequency Power in Plasmas - Park City, UT, United States
    Duration: Apr 11 2005Apr 13 2005

    Publication series

    NameAIP Conference Proceedings
    Volume787
    ISSN (Print)0094-243X
    ISSN (Electronic)1551-7616

    Conference

    ConferenceRADIO FREQUENCY POWER IN PLASMAS: 16th Topical Conference on Radio Frequency Power in Plasmas
    Country/TerritoryUnited States
    CityPark City, UT
    Period04/11/0504/13/05

    Keywords

    • Electron Bernstein waves
    • Spherical tokamaks

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