【摘要】 对于铁电阴极材料,电流发射密度是其关键性能指标。发射电流密度越大,发射出电子能量越高,则材料可以做为强流电子束源应用。然而由于受地电流耦合信号的影响,往往不易测得样品的真实发射电流密度信号。为此,通过实践探讨,对已有的常规测试电路进行了优化,解决了地电流干扰问题,最终确定了较好的测试电路,获得比较满意的测试信号结果。更多还原

【Abstract】 For the ferroelectric cathode materials,the higher the electron emission density is,and the higher the electron energy is.Then the materials can be used with the high-energy electron beam resource.Thus the electron density is the crucial parameter for the ferroelectric cathode material,which is greatly dependent on the testing electronic circuit.Because of the influence of the coupled signal led by the earth-current,it is difficult to obtain the true signal of the samples.The coupled signal was screened,a better electronic circuit was emended and the content results were obtained with it.更多还原