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Abstract

In present day tokamaks carbon is one of the most widely used materials for limiters and wall coatings. It is important to know to what extent carbon containing molecules like CH(4) or CO play a role in the fuelling and impurity release during a discharge. Emission spectroscopy offers a method to determine the strength and the nature of the molecular particle sources. It can also be used to study the breakup processes of the molecular species on their way from the source through the plasma. Unfortunately, there is presently not much information for a plasma with parameters close to that of a tokamak boundary layer concerning observable lines or bands with reasonable intensities, which could be used for absolute flux measurements of the interesting molecules and their radicals in the plasma edge of a tokamak.

Additional information

Authors: POSPIESZCZYK A, Institut für Plasmaphysik, KFA Jülich GmbH (DE);HOGAN J, ORNL, Oak Ridge (US);RA Y, Institute of Plasma and Fusion Research, UCLA, Los Angeles (US);HIROOKA Y, Institute of Plasma and Fusion Research, UCLA, Los Angeles (US);CONN R W, Institute of Plasma and Fusion Research, UCLA, Los Angeles (US);GOEBEL D, Institute of Plasma and Fusion Research, UCLA, Los Angeles (US);LABOMBARD B, Institute of Plasma and Fusion Research, UCLA, Los Angeles (US);NYGREN R E, Institute of Plasma and Fusion Research, UCLA, Los Angeles (US)
Bibliographic Reference: Paper presented: 16th European Conference on Controlled Fusion and Plasma Physics, Venezia (IT), March 13-17, 1989
Availability: Available from (1) as Paper EN 34779 ORA
Record Number: 198910626 / Last updated on: 1994-12-01
Category: PUBLICATION
Original language: en
Available languages: en