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本文简介了用于超导稳态磁镜等离子体物理实验装置中特殊电离真空计的原理、结构，并给出了仪器主要参数和性能的测试结果，表明双调制型热阴极电离规在强磁场下有较高的灵敏度和良好的线性，能排除来自外部的等离子体干扰和规管自身的Ｘ－光电流噪声。该仪器适合特殊环境中１０－９托－１０－４托范围之快速真空度测量，对Ｈ２的响应时间短于１毫秒。它也是热核聚变研究中很有用的一种“诊断”仪器。
This paper introduces the principle and structure of a special ionization vacuum gauge used in the experimental apparatus of the superconducting steady magnetic mirror plasma physics and presents the test results of the main parameters and performance of the instrument. It shows that the dual modulation hot cathode ionization gauge Under the high sensitivity and good linearity, can be excluded from the external plasma interference and regulate their own X-ray current noise. The instrument is suitable for rapid vacuum measurement in the range of 10-9 Torr to 10-4 Torr in a special environment. The response time to H2 is less than 1 millisecond. It is also a “diagnostic” instrument useful in thermonuclear fusion studies.