Surface structure on diamond foils generated by spatially nonuniform laser irradiation
Surface structure on diamond foils generated by spatially nonuniform laser irradiation
复制标题
空间不均匀激光照射产生的金刚石箔表面结构
DOI：
10.1038/s41598-020-66036-3
复制
发表时间：
2020
影响因子：
4.6
通讯作者：
Shigemori Keisuke
中科院分区：
文献类型：
--
作者：
Kato Hiroki;Nagatomo Hideo;Nakai Mitsuo;Sakaiya Tatsuhiro;Terasaki Hidenori;Kondo Tadashi;Hironaka Yoichiro;Shimizu Katsuya;Shigemori Keisuke
在这里，我们报告的材料强度因素对产生的表面结构，由于不均匀的激光照射的影响。实验研究了材料强度对非均匀激光辐照下金刚石表面微扰产生的影响。我们以前的研究表明，更硬，更致密的材料减少表面扰动，由于空间不均匀的激光照射，这是再现良好的计算与多维流体动力学模拟代码。在这项工作中，我们发现，由于屈服强度失效的局部断裂产生高度的照射不均匀性。观察到一个典型的裂纹状表面结构，这是没有再现的二维模拟代码计算。二维模拟表明，在金刚石表面的压力局部超过Hugoniot弹性极限，由于不均匀的照射，这意味着发展的表面扰动的潜力。我们还测量了单晶金刚石和金刚石与薄的高原子序数（高Z）涂层在其表面上的扰动的面密度分布。实验结果表明，刚性材料和薄的高Z涂层的组合可以抑制由大的辐照不均匀性引起的固体强度效应。这里给出的知识适用于惯性约束聚变靶设计，激光材料加工，以及涉及固体和高能量密度等离子体的普遍问题。
Here we report on the effects of material strength factors on the generation of surface structure due to nonuniform laser irradiation. The influence of material strength on the generation of perturbation on a diamond surface subjected to nonuniform laser irradiation was experimentally investigated. Our previous investigations suggested that stiffer and denser materials reduce surface perturbation due to spatially nonuniform laser irradiation, which was reproduced well by calculations with multi-dimensional hydrodynamic simulation code. In this work, we found that local fractures due to yield strength failure are generated by high degrees of irradiation non-uniformity. A characteristic crack-like surface structure was observed, which was not reproduced by the 2D simulation code calculations at all. The 2D simulations showed that the pressure at the diamond surface locally exceeds the Hugoniot elastic limit due to nonuniform irradiation, implying the potential for development of surface perturbations. We also measured the areal-density distribution of perturbations for single-crystal diamond and diamond with a thin high atomic number (high-Z) coating on its surface. The experimental results imply that the combination of a stiff material and thin high-Z coating can suppress the solid-strength effects caused by large irradiation non-uniformity. The knowledge given here is applicable to inertial confinement fusion target design, laser material processing, and universal problems involving solids and high-energy-density plasmas.
登录
查看更多内容
影响因子：
2.2
作者：
H. Kato;K. Shigemori;H. Nagatomo;M. Nakai;T. Sakaiya;T. Ueda;H. Terasaki;Y. Hironaka;K. Shimizu;H. Azechi
通讯作者：
H. Kato;K. Shigemori;H. Nagatomo;M. Nakai;T. Sakaiya;T. Ueda;H. Terasaki;Y. Hironaka;K. Shimizu;H. Azechi
直接驱动平面目标上初始激光压印的单空间模式实验
DOI：
--
发表时间：
2002
期刊：
Physics of Plasmas 9
影响因子：
--
作者：
M.Nakai;H.Azechi;N.Miyanaga;K.Shigemori;T.Kawasaki;T.Nagaya;M.Nishikino;Y.Kanai;D.Ohnuki;H.Nishimura;H.Shiraga;O.Maegawa;R.Ishizaki;K.Nishihara;H.Takabe;T.Yamanaka
通讯作者：
T.Yamanaka
影响因子：
2.2
作者：
R. Nora;R. Betti;K. Anderson;A. Shvydky;A. Bose;K. Woo;A. Christopherson;J. Marozas;T. Collins;P. Radha;S. X. Hu;R. Epstein;F. Marshall;R. Mccrory;T. Sangster;D. Meyerhofer
通讯作者：
R. Nora;R. Betti;K. Anderson;A. Shvydky;A. Bose;K. Woo;A. Christopherson;J. Marozas;T. Collins;P. Radha;S. X. Hu;R. Epstein;F. Marshall;R. Mccrory;T. Sangster;D. Meyerhofer
影响因子：
2.2
作者：
H. Nagatomo;T. Johzaki;Tatsufumi Nakamura;H. Sakagami;A. Sunahara;K. Mima
通讯作者：
H. Nagatomo;T. Johzaki;Tatsufumi Nakamura;H. Sakagami;A. Sunahara;K. Mima
单晶中的各向异性冲击传播
DOI：
--
发表时间：
2005
期刊：
--
影响因子：
--
作者：
J. Eggert;D. Hicks;P. Celliers;D. Bradley;J. Cox;W. Unites;Gilbert W. Collins;R. McWilliams;R. Jeanloz;S. Bruygoo;P. Loubeyre
通讯作者：
P. Loubeyre