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Density and Temperature Profile Modifications with Electron Cyclotron Power Injection in Quiescent Double Barrier Discharges on DIII-D.
D. M. Thomas
T. H. Osborne
A. W. Leonard
W. P. West
E. J. Doyle
T. A. Casper
P. B. Snyder
K. H. Burrell
P. Gohil
C. J. Lasnier
J. M. Moller
J. Weiland
出版
United States. Department of Energy
, 2005
URL
http://books.google.com.hk/books?id=2viiAQAACAAJ&hl=&source=gbs_api
註釋
Quiescent double barrier (QDB) conditions often form when an internal transport barrier is created with high-power neutral-beam injection into a quiescent H-mode (QH) plasma. These QH-modes offer an attractive, high-performance operating scenario for burning plasma experiments due to their quasi-stationarity and lack of edge localized modes (ELMs). Our initial experiments and modeling using ECH/ECCD in QDB shots were designed to control the current profile and, indeed, we have observed a strong dependence on the q-profile when EC-power is used inside the core transport barrier region. While strong electron heating is observed with EC power injection, we also observe a drop in the other core parameters; ion temperature and rotation, electron density and impurity concentration. These dynamically changing conditions provide a rapid evolution of T{sub e} T{sub i} profiles accessible with 0.3
