Plasma rotation and the radial electric field during off-axis NBI in the DIII-D tokamak Metadata

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Title

  • Main Title Plasma rotation and the radial electric field during off-axis NBI in the DIII-D tokamak

Creator

  • Author: Gohil, P.
    Creator Type: Personal
  • Author: Burrell, K.H.
    Creator Type: Personal
  • Author: Osborne, T.H.
    Creator Type: Personal
    Creator Info: General Atomics, San Diego, CA (United States)
  • Author: Hassam, A.B.
    Creator Type: Personal
    Creator Info: Univ. of Maryland, College Park, MD (United States)

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: 1995-12-01

Language

  • English

Description

  • Content Description: Experiments have been carried out on the DIII-D tokamak to investigate whether off-axis NBI can: (a) drive significant perpendicular flow to lead to increased suppression of turbulence and improved confinement, and (b) be used to control the radial electric field profile. Measurements of both impurity ion poloidal and toroidal rotation profiles were made using charge exchange recombination spectroscopy. These experiments used a low current, low elongation (I{sub p} = 0.5 MA, {kappa} = 1.2) plasma whose magnetic axis was shifted 36 cm vertically upward from the vessel midplane and then shifted downward to be centered on the midplane later in the discharge. 10.7 MW of beam power was applied to maximize NBI effect while operating at low target densities and high temperature to minimize poloidal damping. Results from these experiments show a slight increase in impurity ion poloidal rotation velocity during the vertical shifted phase of off-axis NBI discharge. The toroidal rotation profile is more peaked during off-axis NBI. Both these effects lead to a change in the V x B contribution to the radial electric field during off-axis NBI.
  • Physical Description: 4 p.

Subject

  • Keyword: Plasma Diagnostics
  • Keyword: Shape
  • Keyword: H-Mode Plasma Confinement
  • Keyword: Confinement Time
  • STI Subject Categories: 70 Plasma Physics And Fusion
  • Keyword: Doublet-3 Device
  • Keyword: Rotating Plasma
  • Keyword: Plasma Impurities
  • Keyword: Neutral Atom Beam Injection
  • Keyword: Experimental Data

Source

  • Conference: IAEA technical committee meeting/ US-Japan workshop on H-mode physics, Princeton, NJ (United States), 18-20 Sep 1995

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

  • Other: DE96005252
  • Report No.: GA--A22183
  • Report No.: CONF-9509238--4
  • Grant Number: AC03-89ER51114
  • DOI: 10.2172/195709
  • Office of Scientific & Technical Information Report Number: 195709
  • Archival Resource Key: ark:/67531/metadc670469

Note

  • Display Note: INIS; OSTI as DE96005252