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Thermal electron Bernstein wave (EBW) radiation of an overdense plasma was measured with an oblique viewing angle at the W7-AS stellarator. The spectrum consists of local cyclotron-emission part and a nonlocal high-frequency part. Edge temperature perturbations excited by carbon injection were used to demonstrate the relation between frequency and position of emission. Since for the EBW's no density limits exist, the operation window of the electron-cyclotron-emission diagnostic can be extended to densities above the cutoff density

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Authors: BRAMBILLA M, Max-Planck-Institut fur Plasmaphysik (DE)
Bibliographic Reference: Article: Nuclear Fusion, 38(1998)12, 1805-1817
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