Evidence of high-n hollow-ion emission from Si ions pumped by ultraintense x-rays from relativistic laser plasma
Evidence of high-n hollow-ion emission from Si ions pumped by ultraintense x-rays from relativistic laser plasma
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DOI：
10.1209/0295-5075/114/35001
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发表时间：
2016-05-01
期刊：
影响因子：
1.8
通讯作者：
Woolsey, N.
中科院分区：
文献类型：
--
作者：
Colgan, J.;Faenov, A. Ya.;Woolsey, N.
我们报道了在达到辐射优势动力学机制（RDKR）的强激光等离子体相互作用中产生的超强x射线辐射通过泵浦在Si靶中产生的高n空心离子（K或L壳层中没有电子的离子）的首次观察。通过观察硅等离子体的高分辨x射线发射光谱，发现了这些新型中空离子在高能密度等离子体中的存在。等离子体动力学计算证实了这一点，强调了强大的辐射源能够从光原子最内层完全剥离电子的能力。空离子光谱诊断提供了一个独特的机会来表征实验室和天体物理等离子体的强x射线辐射。利用这一技术，我们通过观察中空离子在靶体前后两侧的不对称辐射，为RDKR的存在提供了证据。中国人民解放军版权所有
We report on the first observation of high-n hollow ions (ions having no electrons in the K or L shells) produced in Si targets via pumping by ultra-intense x-ray radiation produced in intense laser-plasma interactions reaching the radiation dominant kinetics regime (RDKR). The existence of these new types of hollow ions in high-energy density plasma has been found via observation of highly resolved x-ray emission spectra of silicon plasma. This has been confirmed by plasma kinetics calculations, underscoring the ability of powerful radiation sources to fully strip electrons from the innermost shells of light atoms. Hollow-ions spectral diagnostics provide a unique opportunity to characterize powerful x-ray radiation of laboratory and astrophysical plasmas. With the use of this technique we provide evidence for the existence of the RDKR via observation of asymmetry in the observed radiation of hollow ions from the front and rear sides of the target. Copyright (C) EPLA, 2016