Open AccessSpectroscopic measurements of impurity temperatures and parallel ion flows in the DIII-D divertor
Author(s) -
R. C. Isler,
N.H. Brooks,
W.P. West,
A.W. Leonard,
G. R. McKee,
G. D. Porter
Publication year - 1998
Publication title -
osti oai (u.s. department of energy office of scientific and technical information)
Language(s) - English
Resource type - Reports
DOI - 10.2172/639745
Subject(s) - divertor , diii d , ion , impurity , zeeman effect , atomic physics , spectral line , multiplet , range (aeronautics) , chemistry , plasma , physics , materials science , magnetic field , nuclear physics , tokamak , organic chemistry , quantum mechanics , astronomy , composite material
Impurity ion temperatures and parallel flow velocities in the DIII-D divertor have been measured from the shapes and shifts of visible spectral lines of C II, C III, and B II. Spectral multiplet patterns are analyzed by fitting them to theoretical profiles that incorporate exact calculations for the Zeeman/Paschen-Back effect. Ion temperatures range from 4--20 eV. Both normal flows toward the target plate and reversed flows away from the target plate are observed in the outer divertor leg; only flows toward the plate are detected in the inner leg
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