论文标题
开发Xuanlong-50血浆诊断的高频磁探针
Development of high-frequency magnetic probe for plasma diagnostics of XuanLong-50
论文作者
论文摘要
在Xuanlong-50（EXL-50）球形圆环上设计和开发了高频磁探针，以测量由等离子体中的能量离子和电子引起的高频磁场波动。详细介绍了探针的磁环，无线电过滤器，射频（RF）限制器和数据采集系统。初步测试的结果表明，探针可以在1-180 MHz范围内具有频率响应。使用快速的傅立叶变换在时频域中分析了EXL-50等离子体的波动数据。使用此诊断系统，检测到不同的高频不稳定性。特别是，观察到了明显的频率chi，这与Berk-Breizman模型预测的尾驱动不稳定性的颠簸一致。
A high-frequency magnetic probe has been designed and developed on XuanLong-50 (EXL-50) spherical torus to measure high-frequency magnetic field fluctuations caused by energetic ions and electrons in the plasma. The magnetic loop, radio filters, radio-frequency (RF) limiter, and data acquisition system of the probe are described in detail. The results of the preliminary test show that the probe can have a frequency response within the 1- 180 MHz range. The fluctuation data from the EXL-50 plasma were analyzed in the time-frequency domain using fast Fourier transforms. Using this diagnostic system, distinct high-frequency instabilities were detected. In particular, significant frequency chirping was observed, which is consistent with the bump on tail drive instability predicted by the Berk-Breizman model.
