Influence of highly charged impurities on ion temperatures measured with active-beam plasma diagnostics

Journal Article · Sat Aug 01 00:00:00 EDT 1987 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.339732· OSTI ID:6489333

Donne, A J.H.; de Heer, F J

The presence of highly charged impurity ions in a (tokamak) plasma can be very disturbing if one wants to apply active-beam scattering diagnostics, for instance, for the measurement of the local ion temperature, since it is nearly impossible to separate particles scattered by the main plasma constituent from those scattered by the impurity ions. In this work it is shown, by making use of already published theoretical results of the electron-loss probability as a function of impact parameter, that not only for H, but also for He injected neutrals, the effect of impurity ions on the relevant energy distribution of scattered neutrals is negligible.

• Research Organization: Association Euratom-FOM, FOM-Instituut voor Plasmafysica, Rijnhuizen, P. O. Box 1207, 3430 BE Nieuwegein, The Netherlands
• OSTI ID: 6489333
• Journal Information: J. Appl. Phys.; (United States), Vol. 62:3
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ION-ATOM COLLISIONS
CHARGE EXCHANGE
PLASMA DIAGNOSTICS
BEAM-PLASMA SYSTEMS
TOKAMAK DEVICES
IMPURITIES
ION TEMPERATURE
ENERGY SPECTRA
EXPERIMENTAL DATA
IMPACT PARAMETER
SCATTERING
ATOM COLLISIONS
CLOSED PLASMA DEVICES
COLLISIONS
DATA
INFORMATION
ION COLLISIONS
NUMERICAL DATA
SPECTRA
THERMONUCLEAR DEVICES
700102* - Fusion Energy- Plasma Research- Diagnostics