The results about the research on the characters of ion beam sputtering show that grid voltage and sputtering gas pressure have great influences on ion beam distribution and current.
溅射特性研究结果表明：屏极电压和溅射气压对离子束均匀性和束流密度影响显著；
This PIC simulating can be extended to gun with asymmetric construction such as grid-control gun and multiple beam gun etc.
这种三维粒子模拟可以扩展到非对称的电子枪的模拟，如橱控电子枪，多注电子枪等。
Using a new material, the transverse wave Angle beam probes in ultrasonic testing of welds for steel space grid structures with welded joints are made.
通过采用一种新材料，制造出了用于焊接球节点钢网架焊缝超声波探伤的超声波横波斜探头。
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