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三梯度法是加速器发射度测量的一种常用方法,但在低能强流的加速器上,由于空间电荷效应很显著,常规的三梯度方法不再适用.修正三梯度法是常规三梯度法考虑空间电荷效应后的改进,本文描述了修正三梯度法用于强流脉冲电子束发射度测量的理论依据,介绍了修正三梯度方法的实验方案.在35MeV,26kA,～100ns和18MeV,26kA,～100ns的两种强流脉冲电子束进行了发射度的实际测量.文中给出了在两种电子束上分别获得的实验结果和误差分析.实验结果表明,修正三梯度方法是强流脉冲电子束发射度测量的一种有效的手段.
The three-gradient method is a common method for the measurement of accelerator’s emissivity, but the conventional three-gradient method is no longer applicable due to the significant space charge effect in the accelerator with low energy and high intensity. The modified three-gradient method is a conventional three- This paper describes the theoretical basis of the modified three-gradient method for the measurement of the intensity of pulsed electron beam with high current and introduces the experimental scheme of the modified three-gradient method.At the same time, 100ns two kinds of high-current pulsed electron beam were used to measure the emissivity.The experimental results and error analysis were respectively given on the two kinds of electron beams.The experimental results show that the modified three-gradient method is a high-intensity pulsed electron beam Emissivity measurement of an effective means.