Plasma Wall Interactions in Heated Plasmas

  • J. Tachon


With the development of larger, more powerful magnetic confinement devices, the study of plasma-wall interactions becomes increasingly relevant to the controlled thermonuclear fusion program. To increase the plasma temperature in Tokamaks from the value reached by ohmic heating (1 – 2 keV), toward the value necessary for self sustaining fusion reactions (5 – 10 keV) requires a tremendous amount of additional power. This is achieved either by the injection of high energy neutral particles — called neutral beam injection (NBI) - or by high frequency electromagnetic radiation — also called radiofrequency heating (RF). In recent experiments the amount of power introduced by these “additional heating” schemes, greatly exceeds the ohmic power (in JET, PNBI + PRF = 25 MW, POH = 2 MW). While substantially increasing the energy density of the plasma a new set of problems are introduced which are associated with the increased plasma wall interactions due to additional heating.


Vacuum Vessel Metallic Impurity Neutral Beam Injection Light Impurity Lower Hybrid Resonance 


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Copyright information

© Plenum Press, New York 1986

Authors and Affiliations

  • J. Tachon
    • 1
  1. 1.Association Euratom — Cea Sur La Fusion, Département de Recherches sur la Fusion ContrôléeCentre d’Etudes NucléairesFontenay-aux-RosesFrance

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