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Quantitative correlation between facets defects of RDX crystals and their laser sensitivity

Yan, Zhonghua, Liu, Wei, Zhang, Chuanchao, Wang, Xuming, Li, Jinshan, Yang, Zongwei, Xiang, Xia, Huang, Ming, Tan, Bisheng, Zhou, Guorui, Liao, Wei, Li, Zhijie, Li, Li, Yan, Hongwei, Yuan, Xiaodong, Zu, Xiaotao
Journal of hazardous materials 2016 v.313 pp. 103-111
atomic force microscopy, crystals, light intensity, scanning electron microscopy, surface roughness, wavelengths
In this work, the {210} facets of cyclotrimethylenetrinitramine (RDX) single crystals with different quality were studied by scanning electron microscopy and atomic force microscopy. Their laser sensitivity was then assessed using a direct laser ignition test irradiated with ultraviolet laser (wavelength: 355nm, pulse width: 6.4ns). Quantitative relationships between laser sensitivity and surface defects of RDX (210) and (2¯1¯0) facets were investigated. It is determined that the laser sensitivity exhibits significant correlation with the surface roughness, size of which is comparable with scales of laser wavelength. 3D FDTD simulations disclose that this relationship can be well explained with light intensity modulation effects induced by micro-defects on the initial plane wave.