摘要
分析了用于纳秒脉冲电流测量的微分环标定难点,提出微分环现场标定方法。通过脉冲形成线脉冲充电以解决微分环标定中信噪比较低、可信度较差等问题;分析了脉冲形成线充电时间、充电电压及脉冲形成开关击穿电压等回路参数对标定结果的影响。基于闪光二号加速器,对测量二极管电流的微分环进行了现场标定,前级隔离开关平均击穿电压为25kV时,微分环标定回路电流达到1.3kA,微分环灵敏度为9.31×1010,方差为0.15×1010。
This paper puts forward a field calibration method of differential ring for nanosecond pulse current measurement after analyzing the problems in calibration. To resolve the low signal to-noise ratio and low reliability issues, the pulse charging principle of pulse forming line is analyzed. The relation between calibration result and charging capacitance, charging inductance, pulse forming line voltage and pulse forming switch breakdown voltage is also analyzed. Field calibration of the differential ring for pulsed electron beam current measurement is conducted on the Flash Ⅱ accelerator. When the average breakdown voltage of the front gap switch is 25 kV, the calibration current is 1.3 kA, the average sensitivity of the differential ring is 9.31 × 10^10 with a de- viation of 0. 15× 10^10.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2012年第2期501-504,共4页
High Power Laser and Particle Beams
关键词
微分环
分布参数
现场标定
信噪比
脉冲形成线
differential ring
distributed parameter
field calibration
signal-to-noise ratio
pulse forming line
