Current drive and profile control in low aspect ratio tokamaks Metadata

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Title

  • Main Title Current drive and profile control in low aspect ratio tokamaks

Creator

  • Author: Chan, V.S.
    Creator Type: Personal
  • Author: Chiu, S.C.
    Creator Type: Personal
  • Author: Lin-Liu, Y.R.
    Creator Type: Personal
  • Author: Miller, R.L.
    Creator Type: Personal
  • Author: Turnbull, A.D.
    Creator Type: Personal

Contributor

  • Sponsor: United States. Department of Energy.
    Contributor Type: Organization
    Contributor Info: USDOE, Washington, DC (United States)

Publisher

  • Name: General Atomic Company
    Place of Publication: San Diego, California
    Additional Info: General Atomics, San Diego, CA (United States)

Date

  • Creation: 1995-07-01

Language

  • English

Description

  • Content Description: The key to the theoretically predicted high performance of a low aspect ratio tokamak (LAT) is its ability to operate at very large plasma current*I{sub p}. The plasma current at low aspect ratios follows the approximate formula: I{sub p} {approximately} (5a{sup 2}B{sub t}/Rq{psi}) [(1 + {kappa}{sup 2})/2] [A/(A {minus} 1)] where A {quadruple_bond} R/a which was derived from equilibrium studies. For constant q{psi} and B{sub t}, I{sub p} can increase by an order of magnitude over the case of tokamaks with A {approx_gt} 2.5. The large current results in a significantly enhanced {beta}{sub t} ({quadruple_bond} {beta}{sub N}I{sub p}/aB{sub t}) possibly of order unity. It also compensates for the reduction in A to maintain the same confinement performance assuming the confinement time {tau} follows the generic form {approximately} HI{sub p}P{sup {minus}1}/{sup 2}R{sup 3}/{sup 2}{kappa}{sup 1}/{sup 2}. The initiation and maintenance of such a large current is therefore a key issue for LATs.
  • Physical Description: 4 p.

Subject

  • Keyword: Mhd Equilibrium
  • Keyword: Ion Cyclotron-Resonance
  • STI Subject Categories: 70 Plasma Physics And Fusion
  • Keyword: Landau Damping
  • Keyword: Non-Inductive Current Drive
  • Keyword: Plasma Heating
  • Keyword: Tokamak Devices
  • Keyword: Aspect Ratio

Source

  • Conference: 22. European conference on controlled fusion and plasma physics, Bournemouth (United Kingdom), 2-7 Jul 1995

Collection

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

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article

Format

  • Text

Identifier

  • Other: DE95017054
  • Report No.: GA-A--22083
  • Report No.: CONF-950704--7
  • Grant Number: FG03-95ER54309
  • Office of Scientific & Technical Information Report Number: 102466
  • Archival Resource Key: ark:/67531/metadc619071

Note

  • Display Note: INIS; OSTI as DE95017054