2010年8月
Electron Density Profile Measurement in Heliotron J with a Microwave AM Reflectometer
CONTRIBUTIONS TO PLASMA PHYSICS
- 巻
- 50
- 号
- 6-7
- 開始ページ
- 646
- 終了ページ
- 650
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1002/ctpp.200900023
- 出版者・発行元
- WILEY-V C H VERLAG GMBH
A microwave reflectometer is developed for electron density profile measurement in Heliotron J. An amplitude modulation (AM) type system is adopted to reduce density fluctuation effects. The carrier frequency ranges from 33 to 56 GHz, and the modulation frequency is 200 MHz. The X-mode is selected as the propagation mode in order to measure a hollow density profile which is typically observed in ECH plasmas. A test-bench examination using an aluminum reflection plate shows that the measured phase shift agrees well with that expected from the change in the plate position. The initial measurement results show that the reconstructed density profile has hollow profile at low density and steep gradient at the edge in ECH plasma. The hollowness is weakened as the averaged density increases. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
- リンク情報
- ID情報
-
- DOI : 10.1002/ctpp.200900023
- ISSN : 0863-1042
- J-Global ID : 201002277675849611
- Web of Science ID : WOS:000280787200032