Optical emission spectroscopy of various materials irradiated by soft x-ray free-electron laser
Optical emission spectroscopy of various materials irradiated by soft x-ray free-electron laser
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软X射线自由电子激光照射下各种材料的发射光谱
DOI：
10.1117/12.822766
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Cihelka J
中科院分区：
文献类型：
--
作者：
Cihelka J
汉堡自由电子激光器（FLASH）输出的32.5nm和13.7nm的激光束分别被掠入射椭圆镜和离轴抛物面镜聚焦到20 μ m和1 μ m的光斑上。本文报道了能量为10 μJ的~10 fs脉冲在各种固体（Si，Al，Ti，Ta，Si_3N_4，BN，a-C/Si，Ni/Si，Cr/Si，Rh/Si，Ce：YAG，聚甲基丙烯酸甲酯- PMMA，不锈钢等）表面的掠入射和正入射聚焦。辐照度分别为1013 W/cm ~ 2和1016 W/cm ~ 2。在这些条件下产生的等离子体的光发射通过配备有iCCD头（iStar 720，Andor）的光栅（1200线/mm和/或150线/mm）光谱仪MS 257（Oriel）记录。令人惊讶的是，只有属于中性原子的线在1013 W/cm 2附近的强度下观察到。没有线的原子离子已被确定在紫外-可见光谱发射的等离子体形成的闪光灯光束聚焦在一个20微米的斑点。在1016 W/cm 2附近的强度下，OE光谱再次由原子线主导。然而，也记录到Al+和Al 2+的弱发射。Al/Al+的丰度比应至少为100。铝等离子体是非常冷的，通过计算机模拟铝等离子体OE谱，发现其激发温度为0.8eV。还记录了来自等离子体（典型的是碳;没有光谱线）和荧光体（在Ce：YAG晶体上，光谱仪记录了发光带和线等离子体发射）的宽带发射。
The beam of Free-Electron Laser in Hamburg (FLASH) tuned at either 32.5 nm or 13.7 nm was focused by a grazing incidence elliptical mirror and an off-axis parabolic mirror coated by Si/Mo multilayer on 20-micron and 1-micron spot, respectively. The grazing incidence and normal incidence focusing of ~10-fs pulses carrying an energy of 10 μJ lead at the surface of various solids (Si, Al, Ti, Ta, Si3N4, BN, a-C/Si, Ni/Si, Cr/Si, Rh/Si, Ce:YAG, poly(methyl methacrylate) - PMMA, stainless steel, etc.) to an irradiance of 1013W/cm2and 1016W/cm2, respectively. The optical emission of the plasmas produced under these conditions was registered by grating (1200 lines/mm and/or 150 lines/mm) spectrometer MS257 (Oriel) equipped with iCCD head (iStar 720, Andor). Surprisingly, only lines belonging to the neutral atoms were observed at intensities around 1013W/cm2. No lines of atomic ions have been identified in UV-vis spectra emitted from the plasmas formed by the FLASH beam focused in a 20-micron spot. At intensities around 1016W/cm2, the OE spectra are again dominated by the atomic lines. However, a weak emission of Al+and Al2+was registered as well. The abundance ratio of Al/Al+should be at least 100. The plasma is really cold, an excitation temperature equivalent to 0.8 eV was found by a computer simulation of the aluminum plasma OE spectrum. A broadband emission was also registered, both from the plasmas (typical is for carbon; there were no spectral lines) and the scintillators (on Ce:YAG crystal, both the luminescence bands and the line plasma emission were recorded by the spectrometer).
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热电子X射线诊断
DOI：
--
发表时间：
1997
期刊：
影响因子：
--
作者：
F. Rosmej
通讯作者：
F. Rosmej
XUV 激光照射固体目标的发射光谱
DOI：
--
发表时间：
2009
期刊：
影响因子：
--
作者：
T. Dzelzainis;F. Khattak;B. Nagler;S. Vinko;T. Whitcher;A. Nelson;R. Lee;S. Bajt;S. Toleikis;R. Fäustlin;T. Tschentscher;L. Juha;M. Kozlová;J. Chalupský;V. Hájková;J. Krzywiński;R. Soberierski;M. Jurek;M. Fajardo;F. Rosmej;P. Heinmann;J. Wark;D. Riley
通讯作者：
D. Riley
聚变、激光和重离子束产生的等离子体中空心离子复杂辐射发射的新型分析模型
DOI：
--
发表时间：
2001
期刊：
影响因子：
--
作者：
F. Rosmej
通讯作者：
F. Rosmej
软 X 射线自由电子激光束的亚微米聚焦
DOI：
10.1117/12.822498
发表时间：
2009
期刊：
Acta crystallographica. Section A, Foundations and advances
影响因子：
--
作者：
S. Bajt;H. Chapman;A. Nelson;R. Lee;S. Toleikis;P. Mirkarimi;J. Alameda;S. Baker;H. Vollmer;R. Graff;A. Aquila;E. Gullikson;J. Meyer Ilse;E. Spiller;J. Krzywiński;L. Juha;J. Chalupský;V. Hájková;J. Hajdu;T. Tschentscher
通讯作者：
T. Tschentscher
影响因子：
3.8
作者：
Chalupsky, J.;Juha, L.;Zastrau, U.
通讯作者：
Zastrau, U.