Optimized design of polarizers with low ohmic loss and any polarization state for the 28 GHz QUEST ECH/ECCD system
Optimized design of polarizers with low ohmic loss and any polarization state for the 28 GHz QUEST ECH/ECCD system
复制标题
针对 28 GHz QUEST ECH/ECCD 系统的低欧姆损耗和任意偏振态偏振器的优化设计
DOI：
10.1016/j.fusengdes.2016.11.019
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发表时间：
2017
影响因子：
1.7
通讯作者：
Sakuji Kobayashi
中科院分区：
文献类型：
--
作者：
Toru Ii Tsujimura;Hiroshi Idei;Shin Kubo;Sakuji Kobayashi
在大功率长脉冲毫米波电子回旋加热和电流驱动传输线（ECH/ECCD）中，极化器槽镜面的欧姆损耗是降低传输损耗的重要问题之一。本文在线偏振入射波激发下，针对不同凹槽参数，在模拟的真实尺寸偏振器斜接弯曲中评估了镜面上的欧姆损耗。为QUEST球形托卡马克装置上新的28 GHz传输线优化设计了低欧姆损耗的偏振器。计算的最佳欧姆损耗被限制为只有小于1.5倍大的铜平面镜在室温下的理论损耗。偏振片的铜圆矩形槽在机械加工中比较容易光滑，所得表面粗糙度不超过0.15 μm，仅为趋肤深度的0.38倍。所设计的椭圆偏振器和偏振旋转器的组合也可以实现反射波的任意偏振态。
In a high-power long-pulse millimeter-wave transmission line for electron cyclotron heating and current drive (ECH/ECCD), the ohmic loss on the grooved mirror surface of polarizers is one of the important issues for reducing the transmission loss. In this paper, the ohmic loss on the mirror surface is evaluated in simulated real-scale polarizer miter bends for different groove parameters under a linearly-polarized incident wave excitation. The polarizers with low ohmic loss are optimally designed for a new 28 GHz transmission line on the QUEST spherical tokamak. The calculated optimum ohmic loss is restricted to only less than 1.5 times as large as the theoretical loss for a copper flat mirror at room temperature. The copper rounded-rectangular grooves of the polarizers were relatively easy to make smooth in mechanical machining and the resultant surface roughness was not more than 0.15 μm, which is only 0.38 times as large as the skin depth. The combination of the designed elliptical polarizer and the polarization rotator can also realize any polarization state of the reflected wave.
使用 3 镜谐振器技术测量 140 GHz 金属反射器的欧姆损耗
DOI：
10.1023/a:1015064616703
发表时间：
2001
期刊：
International Journal of Infrared and Millimeter Waves
影响因子：
--
作者：
W. Kasparek;A. Fernández;F. Hollmann;R. Wacker
通讯作者：
R. Wacker
沟槽表面反射特性的二维FDTD算法数值计算
DOI：
10.1007/s10762-011-9778-5
发表时间：
2011
期刊：
Journal of Infrared, Millimeter, and Terahertz Waves
影响因子：
--
作者：
B. Plaum;E. Holzhauer;C. Lechte
通讯作者：
C. Lechte
用于高功率微波传输的偏振器斜接弯曲：欧姆损耗和冷却
DOI：
10.1016/j.fusengdes.2015.11.017
发表时间：
2016
期刊：
影响因子：
--
作者：
J. Doane;H. Grunloh;W. Martin;W. Wu
通讯作者：
W. Wu