Verlag des Forschungszentrums Jülich
JUEL-3697
Rapp, Jürgen; Telesca, Giuseppe; Jaspers, Roger; Koslowski, Hans Rudolf; Ongena, Jef
Consistency Check on Zeff Diagnostics
18 S., 1999
On TEXTOR three different diagnostics for the determination of the ion effective
plasma charge (Zeff) are installed. All of them measure the bremsstrahlung in the
visible continuum. Additionally one can derive Zeff from the plasma resistivity.
The task of this investigation is to compare the different Zeff determinations in
order to minimize systematic errors. For this purpose different discharge conditions,
ohmic heating, auxiliary heating, low- and high density and impurity seeding were
investigated. An error analysis of the specific diagnostic methods is included.
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