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Profiles of the electron temperature and electron density are needed for the description of the plasma in the boundary. The spectroscopical observation of thermal atomic beams entering the plasma is used for the quasicontinuous determination of the profiles. Lithium sources based on heated Al/Li or Cu/Li alloys are attachable in any position around the torus, delivering profiles of n(e) up to 5 x 1.0 E12/cm3. Helium sources are able to measure T(e) and n(e) profiles in the range of 10 eV to 150 eV and 2 x 1.0 E12/cm3 to 2 x 1.0 E13/cm3, respectively. Both sources and methods for the evaluation of the plasma parameter are described.

Additional information

Authors: SCHWEER B, Forschungszentrum Jülich GmbH (KFA) (DE)
Bibliographic Reference: Article: KFKI-RMKI-KFA-IPP Workshop on the Use of Atomic Beams in Plasma Experiments, Budapest, Ungarn, Report KFKI-1993-19/D (1993) pp. 103-111
Record Number: 199311520 / Last updated on: 1994-11-28
Original language: en
Available languages: en