Abstract
The effect of plasma particle bombardment on beryllium foil windows was investigated by the displacement measurement of the window foil. It was experimentally verified that the beryllium foil began to vibrate after a shot of plasma focus discharge. It was also verified by the displacement measurement that the particle bombardment caused a thermal expansion of the foil. All these dynamic effects of particle bombardment suggested that fatigue fracture of the foil played an important role in the process of the beryllium foil destruction.
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