A new CO 2 laser dispersion interferometer has been developed in the HL-2M tokamak to measure the electron density. In order to meet the needs of high-precision measurement, a data acquisition system with real-time signal conditioning (RSC) method is proposed. It can eliminate part of the impacts of environmental factors, such as mechanical vibration, light path changes, and plasma refraction effect during experiments. In harsh environments, the system can measure the line-integrated density with a high precision of 2 × 10 18 m −2 with the RSC method. The system has been tested in a recent HL-2A experimental campaign, and the results show that the RSC method plays an important role in the plasma electron density measurement.

中文翻译：

---

HL-2M色散干涉仪实时信号调理方法研究

在HL-2M托卡马克中开发了一种新的CO 2激光色散干涉仪，用于测量电子密度。为了满足高精度测量的需求，提出了一种采用实时信号调节（RSC）方法的数据采集系统。它可以消除部分环境因素的影响，例如机械振动，光路变化和实验过程中的等离子体折射效应。在恶劣的环境中，系统可以使用RSC方法以2×10 18 m -2的高精度测量线积分密度。该系统已经在最近的HL-2A实验中进行了测试，结果表明RSC方法在等离子体电子密度测量中起着重要的作用。