Radio-frequency electromagnetic field measurements for direct detection of electron Bernstein waves in a torus plasma.
Radio-frequency electromagnetic field measurements for direct detection of electron Bernstein waves in a torus plasma.
复制标题
用于直接检测环面等离子体中电子伯恩斯坦波的射频电磁场测量。
DOI：
10.1063/1.3082047
复制
发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Y. Ogawa
中科院分区：
文献类型：
--
作者：
E. Yatsuka;K. Kinjo;J. Morikawa;Y. Ogawa
为了直接识别环形等离子体中的模式转换电子伯恩斯坦波（EBW），我们研制了一套干涉测量系统，将探测天线插入等离子体中，直接探测注入等离子体柱外的诊断微波。在这项工作中，等离子体的生产和加热实现了2.45 GHz，2.5千瓦的电子回旋加热（ECH），而诊断进行了较低的功率（10 W）的单独频率（1-2.1 GHz）的微波。三个组成部分，即，用插入等离子体中的三个探测天线同时测量ECRF电场的两个电磁（环形和极向）和一个静电（如果折射率充分高于1，则其对应于径向分量）。通过实验检查每个分量信号的选择性。激励天线具有很高的线极化方向选择性。作为用于检测电磁部件的探测天线，我们采用了长度为35 mm的微带天线，并且可以利用该天线分离ECRF电场的极向（O波）和环形（X波）分量。为了检测作为静电波的EBW，使用小尖端（1 mm）天线。作为初步结果，我们检测到的信号具有EBW的三个特征，即，短波长、反向传播和静电。
To identify the mode-converted electron Bernstein wave (EBW) in a torus plasma directly, we have developed an interferometry system, in which a diagnostic microwave injected outside of the plasma column was directly detected with the probing antenna inserted into the plasma. In this work, plasma production and heating are achieved with 2.45 GHz, 2.5 kW electron cyclotron heating (ECH), whereas diagnostics are carried out with a lower power (10 W) separate frequency (1-2.1 GHz) microwave. Three components, i.e., two electromagnetic (toroidal and poloidal directions) and an electrostatic (if refractive index is sufficiently higher than unity, it corresponds to radial component), of ECRF electric field are simultaneously measured with three probing antennas, which are inserted into plasma. Selectivities of each component signal were checked experimentally. Excitation antennas have quite high selectivity of direction of linear polarization. As probing antennas for detecting electromagnetic components, we employed a monopole antenna with a length of 35 mm, and the separation of the poloidal (O-wave) and toroidal (X-wave) components of ECRF electric field could be available with this antenna. To detect EBW, which is an electrostatic wave, a small tip (1 mm) antenna was used. As the preliminary results, we detected signals that have three characteristics of EBW, i.e., short wavelength, backward propagation, and electrostatic.
影响因子：
8.6
作者：
Syunichi Shiraiwa;K. Hanada;Makoto Hasegawa;H. Idei;H. Kasahara;O. Mitarai;Kazuo Nakamura;Nobuhiro Nishino;H. Nozato;M. Sakamoto;Keisuke Sasaki;Kohnosuke Sato;Y. Takase;Takuma Yamada;H. Zushi
通讯作者：
Syunichi Shiraiwa;K. Hanada;Makoto Hasegawa;H. Idei;H. Kasahara;O. Mitarai;Kazuo Nakamura;Nobuhiro Nishino;H. Nozato;M. Sakamoto;Keisuke Sasaki;Kohnosuke Sato;Y. Takase;Takuma Yamada;H. Zushi