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      • HARVEST
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      INVESTIGATION OF RESISTIVE GEODESIC ACOUSTIC MODE IN THE EDGE OF STOR-M TOKAMAK

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      DING-THESIS.pdf (13.81Mb)
      Date
      2013-02-08
      Author
      Ding, Yue
      Type
      Thesis
      Degree Level
      Masters
      Metadata
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      Abstract
      A new resistive Geodesic Acoustic Mode (GAM) theory is developed by two-fluids analysis and resistive gyro-kinetic formulation in this thesis. An analytical expression is obtained for the resistive GAM frequency. This theory suggests a large collision frequency will prohibit the parallel current in tokamak, which establishes the cross-field charge neutrality condition ∇·J⊥= 0 for the existence of GAM at the edge plasma of tokamak. Therefore, the resistive GAM theory provides a more plausible explanation to edge GAM phenomena. Various probe arrays are designed and installed in the STOR-M tokamak to search for the poloidal GAM phenomena. A series of experiments were conducted in the L-mode and RMP discharges. The FFT and wavelet analyses indicate the existence of GAM phenomena in STOR-M, and the observed GAM frequencies match the theoretical predication using the resistive GAM model.
      Degree
      Master of Science (M.Sc.)
      Department
      Physics and Engineering Physics
      Program
      Physics
      Supervisor
      Hirose, Akira
      Committee
      Xiao, Chijin; Ghezelbash, Masoud; Merriam, Jim; Smolyakov, Andrei
      Copyright Date
      January 2012
      URI
      http://hdl.handle.net/10388/ETD-2012-01-896
      Subject
      Geodesic Acoustic Mode
      resistive
      plasma
      STOR-M
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