| Autor: |
Tetsuo Seki, M. Sonehara, A. Nakanishi, H. Furui, Takashi Yamaguchi, Keishun Nakamura, H. Togashi, Osamu Watanabe, Akira Ejiri, Takuma Yamada, S. Tsuda, Takuma Wakatsuki, K. Imamura, Yoshihiko Nagashima, Hiroshi Kasahara, Yuichi Takase, Takahiro Shinya, Hidetoshi Kakuda, T. Inada, Kenji Saito, Fujio Shimpo, Naoto Tsujii, Junichi Hiratsuka, Takuya Oosako |
| Jazyk: |
angličtina |
| Rok vydání: |
2014 |
| Předmět: |
|
| Zdroj: |
Plasma and Fusion Research. 9(Special Issue 2):3402040 |
| ISSN: |
1880-6821 |
| DOI: |
10.1585/pfr.9.3402040 |
| Popis: |
RF magnetic probes can be used to measure not only the wavevector, but also the polarization of waves in plasmas. A 5-channel RF magnetic probe (5ch-RFMP) was installed in the TST-2 spherical tokamak and the waves were studied in detail during lower hybrid wave injection experiments. From the polarization measurements, the poloidal RF magnetic field is found to be dominant. In addition to polarization, components of k perpendicular to the major radial direction were obtained from phase differences among the five channels. The radial wavenumber was obtained by scanning the radial position of the 5ch-RFMP on a shot by shot basis. The measured wavevector and polarization in the plasma edge region were consistent with those calculated from the wave equation for the slow wave branch. While the waves with small and large k∥ were excited by the antenna, only the small k∥ component was measured by the 5ch-RFMP; this suggests that the waves with larger k∥ were absorbed by the plasma. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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