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托卡马克装置中存在强磁场、强电场,放电过程中真空度变化迅速。为满足这种特殊环境的真空测量要求,开展了抗强干扰快速测量真空规及仪器的研究。快规使用平板电极结构,在普通热阴极电离规管的基础上增加了调制极;仪器电路除完成稳发射、为加速极供电、离子流放大等基本功能外,它可以提供更大的灯丝电流,为调制极提供周期性脉冲电压,离子流和电子流放大器、调制/解调电路和锁相环电路相互配合,确保快速准确测量。仪器的主控制单元以微处理器为核心,可以设定系统运行的相关参数,离子流、发射电流、灯丝电流可供主控单元采集,以配合完成自动调整和相应控制。
There is a strong magnetic field in the tokamak device, a strong electric field, the degree of vacuum changes rapidly during the discharge. In order to meet the vacuum measurement requirements of this special environment, the research of anti-interference and rapid measurement of vacuum gauges and instruments has been carried out. The rapid use of flat-plate electrode structure, based on the ordinary hot cathode ionization regulation to increase the modulation pole; instrument circuit in addition to complete the stable emission, in order to accelerate the pole power supply, ion current amplification and other basic functions, it can provide greater filament current , Periodic pulse voltage for the modulation pole, ion current and electron current amplifier, modulation / demodulation circuit and phase-locked loop circuit cooperate to ensure fast and accurate measurement. The main control unit of the instrument takes the microprocessor as the core, and can set the relevant parameters of the system operation. The ion current, the emission current and the filament current can be collected by the main control unit to complete the automatic adjustment and corresponding control.