[2] Brownridge J D. Nature, 1992, 358: 287.
[3] Brownridge J D, Raboy S. Journal of Applied Physics, 1999, 86(1): 640.
[4] Hanamoto K, Kawabe A, Sakoda A, et al. Nuclear Instruments and Methods in Physics Research A, 2012, 669: 66.
[6] Rosenman G, Shur D, Krasik Y E, et al. Journal of Applied Physics, 2000, 88(11): 6109.