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Particle fluxes into the plasma and their velocity distributions can be obtained by measuring both spectral and spatial line density profiles of hydrogen and impurities as well as their integrated intensities. With the injection of helium and/or lithium atoms, information about local electron densities and temperatures can be obtained by scanning their spatial line emission profiles. Near the wall, highly stripped ion densities can be measured with charge exchange excitation by fast ion beams. Velocity distributions of neutrals can be detected by laser induced fluorescence. For the interpretation of the intensities, a thorough knowledge of the excitation mechanisms and their dependence on the plasma parameters is essential.

Additional information

Authors: POSPIESZCZYK A, Forschungszentrum Jülich GmbH (KFA) (DE)
Bibliographic Reference: Article: Atomic and Plasma-Material Interaction Processes in Controlled Thermonuclear Fusion (1993) pp. 213-242
Record Number: 199311250 / Last updated on: 1994-11-29
Original language: en
Available languages: en