51. Development of 2-D Antenna Array for Microwave Imaging Reflectometry in LHD
- Author
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Kuwahara, Daisuke, TSUJI-IIO, SHUNJI, Nagayama, Yoshio, Yoshinaga, Tomokazu, Sugito, Masaharu, Shi, Zhongbing, Yamaguchi, Soichiro, Kogi, Yuichiro, and Mase, Atsushi
- Subjects
Astrophysics::Instrumentation and Methods for Astrophysics ,Microwave Reflectometry, Electron density profile, Density fluctuation, 2-D Antenna array ,Computer Science::Information Theory - Abstract
A 2-D antenna array for the Microwave Imaging Reflectometry (MIR) has been developed for the Large Helical Device (LHD). The MIR is a method of electron density diagnostics by the use of microwave radar techniques to obtain 2-D/3-D images of electron density fluctuations for the investigation of micro-turbulence and magneto-hydrodynamic instabilities in magnetically confined plasmas. The antenna array consists of five antennas in the toroidal direction and eight ones in the poloidal direction, respectively. As a test of an antenna element, a pyramidal horn antenna in the frequency range of 10-15 GHz was compared with the Yagi-Uda antenna. Based on the test results of the lower frequency antenna element, we manufactured a 2-D horn antenna array in the frequency rang of 50-75 GHz.
- Published
- 2009