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首页> 外文期刊>Journal of Experimental and Theoretical Physics >Microdroplet Evolution Induced by a Laser Pulse
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Microdroplet Evolution Induced by a Laser Pulse

机译：激光脉冲引起的微滴演化

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摘要

Interaction between high-power ultrashort laser pulse and giant clusters (microdroplets) consisting of 109 to 1010 atoms is considered. The microdroplet size is comparable to the laser wavelength. A model of the evolution of a microdroplet plasma induced by a high-power laser pulse is developed, and the processes taking place after interaction with the pulse are analyzed. It is shown theoretically that the plasma is superheated: its temperature is approximately equal to the ionization potential of an ion having a typical charge. The microdroplet plasma parameters are independent of the pulse shape and duration. The theoretical conclusions are supported by experimental studies of x-ray spectra conducted at JAERI, where a 100-terawatt Ti-sapphire laser system was used to irradiate krypton and xenon microdroplets by laser pulses with pulse widths of 30 to 500 fs and intensities of 6 * 10~(16) to 2 * 10~(19) W/cm~2.
机译：考虑了高功率超短激光脉冲与由109至1010个原子组成的巨型簇（微滴）之间的相互作用。微滴的大小与激光波长相当。建立了由高功率激光脉冲引起的微滴等离子体演化的模型，并分析了与脉冲相互作用后发生的过程。理论上显示等离子体是过热的：其温度大约等于具有典型电荷的离子的电离电势。微滴血浆参数与脉冲形状和持续时间无关。在JAERI进行的X射线光谱实验研究支持了理论结论，其中使用100兆瓦的钛蓝宝石激光系统通过脉冲宽度为30至500 fs，强度为6的激光脉冲辐照k和氙微滴。 * 10〜（16）至2 * 10〜（19）W / cm〜2。

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