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1. 发明公开

EP3301682A1 HIGH POWER TW/PW LASER IRRADIATION 审中-公开
标题翻译：高功率TW / PW激光照射
公开(公告)号：EP3301682A1
公开(公告)日：2018-04-04
申请号：EP16464009.6
申请日：2016-10-14
申请人： National Institute for Laser, Plasma and Radiation Physics
发明人： National Institute for Laser, Plasma and Radiation Physics , Lungu, Petrica Cristian , Porosnicu, Corneliu-Constantin , Jepu, Ionut , Lungu, Mihail , Banici, Romeo , Marcu, Aurelian , Luculescu, , Ursescu, Daniel
IPC分类号： G21B1/13
CPC分类号： G21B1/13 , Y02E30/128
摘要： The present invention refers to the method used to form diamond nano-sized structures on certain substrates made from interest materials for nuclear fusion using lasers in impulses. The present invention uses short laser beams (fs, ps) produced with a repetition rate of 1- 10 Hz, and wavelength from around 750 nm until around 850 nm, the most frequent at a frequency of 800 nm in vacuum or gaseous atmosphere (air or deuterium).
The mixed films containing Be, C, W were obtained using the thermionic vacuum arc method (TVA). These films have thicknesses of 0.1 - 10 µm and interact directly with single or multiple laser beams as well as with the plasma produced by indirect laser beam irradiation in ambient gases as air or deuterium. The laser pulses produce diamond or fullerene nanostructures on the irradiated mixed materials surface.
By this method, the irradiated material is processed in a non-thermal mechanism. Multiphotonic interactions and collision ionizations combination creates plasmas in the impact areas of shorter term than the kinetic electron energy that can be transferred in the material. The produced plasma is not in thermal equilibrium, the irradiated material being changed from initial solid state in totally ionized plasma in such a short time that the thermal equilibrium can not be reached. As a result, a negligible thermal transfer to the layers outside the interaction area occurs. The transition of this non-thermal regime to the thermal regime depends on the irradiated material and it is in the range 1 to 20 ps. Due to the fact that the unexposed area heating is negligible, the adjacent material composition is substantially unaffected by the irradiation process proposed in the present invention.
摘要翻译：本发明涉及用于在利用激光激发核聚变的感兴趣材料制成的某些基底上形成金刚石纳米级结构的方法。本发明使用以1-10Hz的重复频率产生的短激光束（fs，ps）和从750nm附近直到850nm附近的波长，在真空或气体气氛（空气或氘）。含有Be，C，W的混合膜使用热离子真空电弧法（TVA）获得。这些薄膜的厚度为0.1 - 10μm，与单个或多个激光束以及间接激光束作为空气或氘在环境气体中产生的等离子体直接相互作用。激光脉冲在被照射的混合材料表面上产生金刚石或富勒烯纳米结构。通过这种方法，被照射的材料以非热机理进行处理。多光子相互作用和碰撞电离组合在短时间的撞击区域中产生等离子体，而不是在材料中可以转移的动能电子能量。产生的等离子体不处于热平衡状态，照射的材料在短时间内从完全电离的等离子体中的初始固态变为不能达到热平衡。结果，发生到相互作用区域之外的层的可忽略的热转移。这种非热状态向热状态的转变取决于被照射的材料，其范围为1至20 ps。由于未曝光区域的加热可以忽略不计，所以相邻的材料组合物基本上不受本发明提出的照射过程的影响。

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