Ion cyclotron emission due to the newly-born fusion products induced fast Alfven wave radiative instabilities in tokamaks Metadata

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Title

  • Main Title Ion cyclotron emission due to the newly-born fusion products induced fast Alfven wave radiative instabilities in tokamaks

Creator

  • Author: Arunasalam, V.
    Creator Type: Personal

Contributor

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

Publisher

  • Name: Princeton University. Plasma Physics Laboratory.
    Place of Publication: Princeton, New Jersey
    Additional Info: Princeton Univ., NJ (United States). Plasma Physics Lab.

Date

  • Creation: 1995-08-01

Language

  • English

Description

  • Content Description: The velocity distribution functions of the newly born (t = 0) charged fusion products of tokamak discharges can be approximated by a monoenergetic ring distribution with a finite v{sub {parallel}} such that v{sub {perpendicular}} {approx} v{sub {parallel}} {approx} v{sub j} where (M{sub j}V{sub j}{sup 2}/2) = E{sub j}, the directed birth energy of the charged fusion product species j of mass M{sub j}. As the time t progresses these distribution functions will evolve into a Gaussian in velocity with thermal spreadings given by the perpendicular and parallel temperatures T{sub {perpendicular}j}(t) = T{sub {parallel}j}(t) with T{sub j}(t) increasing as t increases and finally reaches an isotropic saturation value of T{sub {perpendicular}j}(t {approx} {tau}{sub j}) = T{sub {parallel}j}(t {approx} {tau}{sub j}) = T{sub j}(t {approx} {tau}{sub j}) {approx} [M{sub j}T{sub d}E{sub j}/(M{sub j} + M)]{sup 1/2}, where T{sub d} is the temperature of the background deuterium plasma ions, M is the mass of a triton or a neutron for j = protons and alpha particles, respectively, and {tau}{sub j} {approx} {tau}{sub sj}/4 is the thermalization time of the fusion product species j in the background deuterium plasma and {tau}{sub sj} is the slowing-down time. For times t of the order of {tau}{sub j} their distributions can be approximated by a Gaussian in their total energy. Then for times t {ge} {tau}{sub sj} the velocity distributions of these fusion products will relax towards their appropriate slowing-down distributions. Here the authors will examine the radiative stability of all these distributions. The ion cyclotron emission from energetic ion produced by fusion reactions or neutral beam injection promises to be a useful diagnostic tool.
  • Physical Description: 40 p.

Subject

  • Keyword: Two-Stream Instability
  • Keyword: Protons
  • Keyword: Plasma Diagnostics
  • Keyword: Fusion Yield
  • STI Subject Categories: 70 Plasma Physics And Fusion
  • Keyword: Neutral Atom Beam Injection
  • Keyword: Spatial Distribution
  • Keyword: Cyclotron Harmonics
  • Keyword: Time Dependence
  • Keyword: Alfven Waves
  • Keyword: Cyclotron Radiation
  • Keyword: Tokamak Devices
  • Keyword: Plasma Instability
  • Keyword: Alpha Particles

Source

  • Other Information: PBD: Aug 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: DE96007487
  • Report No.: PPPL--3133
  • Grant Number: AC02-76CH03073
  • DOI: 10.2172/206581
  • Office of Scientific & Technical Information Report Number: 206581
  • Archival Resource Key: ark:/67531/metadc664104

Note

  • Display Note: INIS; OSTI as DE96007487
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