COMPARISON OF SENSORS FOR RESISTIVE WALL MODE FEEDBACK CONTROL MILESTONE No.145 CONTAINING PLASMA INSTABILITIES WITH METAL WALLS Metadata

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Title

  • Main Title COMPARISON OF SENSORS FOR RESISTIVE WALL MODE FEEDBACK CONTROL MILESTONE No.145 CONTAINING PLASMA INSTABILITIES WITH METAL WALLS

Creator

  • Author: Strait, E. J.
    Creator Type: Personal
  • Author: CHU, M. S.
    Creator Type: Personal
  • Author: Garofalo, A. M.
    Creator Type: Personal
  • Author: Lahaye, R. J.
    Creator Type: Personal
  • Author: Okabayashi, M.
    Creator Type: Personal
  • Author: Reimerdes, H.
    Creator Type: Personal
  • Author: Scoville, J. T.
    Creator Type: Personal
  • Author: Turnbull, A. D.
    Creator Type: Personal

Contributor

  • Sponsor: United States
    Contributor Type: Organization

Publisher

  • Name: General Atomic Company
    Place of Publication: United States
    Additional Info: General Atomics (United States)

Date

  • Creation: 2002-09-01

Language

  • English

Description

  • Content Description: OAK A271 COMPARISON OF SENSORS FOR RESISTIVE WALL MODE FEEDBACK CONTROL MILESTONE No.145 CONTAINING PLASMA INSTABILITIES WITH METAL WALLS. The most serious instabilities in the tokamak are those described by ideal magneto-hydrodynamic theory. These modes limit the stable operating space of the tokamak. The ideal MHD calculations predict the stable operating space of the tokamak may be approximately doubled when a perfectly conducting metal wall is placed near the plasma boundary, compared to the case with no wall (free boundary). The unstable mode distortions of the plasma column cannot bulge out through a perfectly conducting wall. However, real walls have finite conductivity and when plasmas are operated in the regime between the free boundary stability limit and the perfectly conducting wall limit, the unstable mode encountered in that case the resistive wall mode, can leak out through the metal wall, allowing the mode to keep slowly growing. The slow growth affords the possibility of feedback stabilizing this mode with external coils. DIII-D is making good progress in such feedback stabilization research and in 2002 will use an improved set of mode sensors inside the vacuum vessel and closer to the plasma surface which are expected theoretically to improve the ability to stabilize the resistive wall mode.
  • Physical Description: 19 pages

Subject

  • Keyword: Feedback
  • Keyword: Stabilization
  • STI Subject Categories: 70 Plasma Physics And Fusion Technology
  • Keyword: Doublet-3 Device
  • Keyword: Stability
  • Keyword: Plasma

Source

  • Other Information: PBD: 1 Sep 2002

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Report

Format

  • Text

Identifier

  • Grant Number: AC03-99ER54463
  • DOI: 10.2172/813662
  • Office of Scientific & Technical Information Report Number: 813662
  • Archival Resource Key: ark:/67531/metadc737202

Note

  • Display Note: INIS; OSTI as DE00813662
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