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A calorimetric system for charge and kinetic energy characterizations of pulsed electron beams
Radiation Measurements ( IF 2 ) Pub Date : 2021-03-25 , DOI: 10.1016/j.radmeas.2021.106569
Maksim Serebrennikov , Egor Adamov , Artem Poloskov , Xiao Yu , Ivan Egorov

The monitoring of the cross-sectional distribution of an electron beam plays a significant role in scientific research and applications. A sectioned calorimeter system combined with a detector of total electron beam current by Faraday cup was developed for estimating the charge and energy distribution of pulsed electron beams. The calorimeter, consisting of a collector with 61 sections and a matrix of remote thermal sensors (pyrometers), allows measuring the cross-sectional energy distribution of pulsed electron beam with an electron kinetic energy up to 700 keV, energy density within 3.6 J/cm2, and total beam energy up to 50 J/pulse. The response of each section is separately monitored and the total current from all the collector sections is measured for beam charge calculation. The charge distribution is estimated in proportion to the total energy distribution. The system was tested with a pulsed electron beam ejected into the atmosphere (accelerating voltage 270 kV, current 140 A, 100 ns FWHM). The difference in the output between the developed system and diagnostics equipment of the accelerator is within 10%. With measured total energy of 4 J/pulse and transferred charge of 13.6 μC/pulse, an average electron kinetic energy of 115 keV was estimated, fulfills the monitoring of cross-sectional energy density and the estimation of the average electron kinetic energy.



中文翻译:

量热系统,用于表征脉冲电子束的电荷和动能

电子束横截面分布的监测在科学研究和应用中起着重要作用。开发了一种分段热量计系统,结合了法拉第杯的总电子束电流检测器,用于估算脉冲电子束的电荷和能量分布。量热仪由61个部分的收集器和一个远程热传感器(高温计)矩阵组成,可以测量脉冲动电子束的截面能量分布,电子动能高达700 keV,能量密度在3.6 J / cm之内2个,总光束能量高达50 J /脉冲。分别监视每个部分的响应,并测量所有集电极部分的总电流,以计算束电荷。电荷分布与总能量分布成比例估算。用脉冲电子束发射到大气中(加速电压270 kV,电流140 A,100 ns FWHM)对系统进行测试。加速器的开发系统和诊断设备之间的输出差异在10%以内。在测得的总能量为4 J /脉冲且转移电荷为13.6μC/脉冲的情况下,估计的平均电子动能为115 keV,可实现截面能量密度的监测和平均电子动能的估计。

更新日期:2021-03-30
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