阳加速器水传输线D-dot的设计、标定和实验

 应用D-dot探测器进行了阳加速器水传输线电压测量，利用探头与高压电极之间的结构电容获得脉冲电压的微分信号，通过RC积分取得电压信号。利用Pspice软件的瞬态分析功能模拟结合实验结果估算了探测器的杂散参数，进行了幅频响应特性分析；运用频响分析解释了测试结果。在加速器低电压短路实验状态下，用电阻分压器对其进行了在线标定。测量结果表明D-dot探测器获取了正确的电压波形，且工作稳定可靠。

Design, calibration and measurement of D-dot monitor for Yang accelerator water transmission line

A D-dot monitor was designed to measure the voltage of Yang accelerator water transmission line.A signal proportional to the time derivative of the voltage was given with capacitor from high voltage electrode to the probe and the voltage was given with the RC integrator.The parameters(inductance and capacitance) were estimated using the transient analysis of OrCAD/Pspice and the amplitude-frequency response of the monitor was analyzed.The result of measurement can be explained using the analysis.The monitor was calibrated in-situ with resistive divider while accelerator was short-circuit at lower Marx-bank charge voltages.The experimental result indicates that the designed D-dot monitor is satisfactory to the measurement requirement.