Investigation of edge neutral flux on the ISX-B tokamak using a low-energy charge-exchange analyzer Metadata

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  • Main Title Investigation of edge neutral flux on the ISX-B tokamak using a low-energy charge-exchange analyzer


  • Author: Thomas, D. M.
    Creator Type: Personal


  • Name: Oak Ridge National Laboratory
    Place of Publication: Tennessee


  • Creation: 1983-08-01


  • English


  • Content Description: To study the emission of D/sup 0/ from the periphery of a tokamak plasma, a low-energy neutral particle spectrometer optimized for (16 < E < 500 eV) has been built and employed on the Impurity Study Experiment (ISX-B) tokamak. The diagnostic utilizes a cesium vapor cell to form negative ions from the incident D/sup 0/ neutrals and a four-channel electrostatic analyzer to energy analyze the negative ions. The spectrometer was absolutely calibrated using D/sup 0/ beams formed by electron capture by positive ions in a gas cell and by photo-detachment of negative ions by a yttrium-aluminum-garnet laser. For the observation region chosen on ISX-B (120/sup 0/ toroidally away from the limiter, near the gas puff), the neutral particle flux has a two-component nature. These data are well fit by two separate exponential distributions of equivalent temperatures 6 to 8 eV for particle energies below about 80 eV and 70 to 80 eV for particle energies above 80 eV. For ohmically heated discharges, the measured particle flux in the energy range 25 to 700 eV is approx. 2.5 x 10/sup 15/ cm/sup -2/.s/sup -1/; the mean particle energy is approx. 70 eV, and the calculated flux at the wall is approx. 30 mW/cm/sup 2/. The major effect of neutral beam heating is to increase the particle flux in the 25- to 700-eV range by a factor of 3.
  • Physical Description: Pages: 86


  • Keyword: Isotopes
  • Keyword: Plasma Diagnostics
  • Keyword: Hydrogen Isotopes
  • Keyword: Odd-Odd Nuclei
  • STI Subject Categories: 70 Plasma Physics And Fusion Technology
  • Keyword: Isx Tokamak
  • Keyword: Charge Exchange
  • Keyword: Atoms
  • Keyword: Light Nuclei
  • Keyword: Beam Analyzers
  • Keyword: Deuterium
  • Keyword: Stable Isotopes
  • Keyword: Plasma Sheath
  • Keyword: Tokamak Type Reactors 700102* -- Fusion Energy-- Plasma Research-- Diagnostics
  • Keyword: Nuclei
  • Keyword: Thermonuclear Reactors
  • Keyword: Electrostatic Analyzers


  • Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted


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


  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Report


  • Text


  • Other: DE83016959
  • Report No.: ORNL/TM-8671
  • Grant Number: W-7405-ENG-26
  • DOI: 10.2172/5935357
  • Office of Scientific & Technical Information Report Number: 5935357
  • Archival Resource Key: ark:/67531/metadc1102603


  • Display Note: NTIS, PC A05/MF A01; 1.