For successful tokamak operation with adequate mode selection of the electron cyclotron wave, launching wave polarization should be accurately controlled. In this study, a new method is proposed to efficiently identify the response of polarizers using a geometric approach in the Stokes space, focusing on the fact that polarization can be represented as a vector in Stokes space and the response of a polarizer can be described as a rotation. The proposed methods are intended (i) to determine the response parameters of a polarizer or (ii) to determine the response parameters of two polarizers simultaneously. A simple measurement system was prepared to observe the polarizers’ output polarization in the 110/138 GHz transmission line. The determined response parameters of two polarizers can reproduce measured polarizations with sufficient accuracy above 99%. The direction of an output polarization circularity, the only feature of a polarization that could not be directly known from the prepared measurement, could also be determined with sufficient accuracy.

为了成功进行托卡马克操作并选择适当的电子回旋波模式，应精确控制发射波的极化。在这项研究中，提出了一种新的方法，该方法可以利用几何方法在斯托克斯空间中有效地识别偏振器的响应，重点是可以在斯托克斯空间中将偏振表示为矢量，并且可以将偏振器的响应描述为以下事实：旋转。所提出的方法旨在（i）确定偏振器的响应参数或（ii）同时确定两个偏振器的响应参数。准备了一个简单的测量系统，以观察110/138 GHz传输线中偏振器的输出偏振。所确定的两个偏振器的响应参数可以以高于99％的足够精度再现测量到的偏振。输出极化圆度的方向，即从准备的测量中不能直接得知的极化的唯一特征，也可以以足够的精度确定。