Journal
FUSION ENGINEERING AND DESIGN
Volume 88, Issue 11, Pages 2950-2955Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.fusengdes.2013.06.004
Keywords
Microwave reflectometer; Density profile; Heterodyne detection; Density fluctuation; Sawtooth; Tokamak
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Funding
- National Magnetic Confinement Fusion Program of China [2010GB10600, 2010GB10601]
- National Natural Science Foundation of China [11021565, 11275234]
- JSPS-NRF-NSFC A3 Foresight Program in the field of Plasma Physics (NSFC) [11261140328]
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A X-mode polarized W-band reflectometer for plasma density profile and fluctuation measurement is designed and installed on EAST. In measuring the density profile, a voltage controlled oscillator (VCO) is used as the source, allowing a high temporal resolution measurement. The density profile in a plasma with high magnetic field (3.0T) has been measured by combination of V- and W-band reflectometers. For fluctuation measurements, a frequency synthesizer is used instead of the VCO as a microwave source. The core density fluctuations during sawtooth activity are measured and analyzed. (C) 2013 Elsevier B.V. All rights reserved.
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