Current drive and profile control in low aspect ratio tokamaks Metadata

Metadata describes a digital item, providing (if known) such information as creator, publisher, contents, size, relationship to other resources, and more. Metadata may also contain "preservation" components that help us to maintain the integrity of digital files over time.


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


  • 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


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


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


  • Creation: 1995-07-01


  • English


  • 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.


  • 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


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


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


  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article


  • Text


  • 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


  • Display Note: INIS; OSTI as DE95017054