XUV spectroscopy of laser plasma from molecular coated metal targets

Atomic and Molecular Spectroscopy Pub Date : 1900-01-01 DOI:10.1117/12.375293

V. Papanyan, G. Nersisyan, F. Tittel

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Abstract

Metal targets covered by micrometer layers of metal- phthalocyanines or fullerenes are studied here. An increase in XUV yield due to the optimized absorption of the laser field is reported. Effects of high-temperature plasma rapid expansion (velocity about 106 cm/s) were observed. Moderate power nanosecond and picosecond neodymium lasers are used to produce an incident intensity of 1011 to 1013 W/cm2 on the targets. The plasma electron density was measured by fitting observed spectral profiles to the theoretical profiles. Collisional, Doppler, and Stark broadening mechanisms were considered in the calculations. Our measurement technique permits us to determine the electron density and temperature dependence on distances from the target surface from 1 mm (where Ne approximately equals 1018 cm-3 and Te approximately equals 14 eV are measured for aluminum plasma) up to approximately 5 mm (where Ne

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分子包覆金属靶激光等离子体的XUV光谱

本文研究了由金属-酞菁或富勒烯微米层覆盖的金属靶。由于优化了激光场的吸收，XUV产率得到了提高。观察到高温等离子体快速膨胀(速度约为106 cm/s)的影响。中等功率的纳秒和皮秒钕激光器用于在目标上产生1011至1013 W/cm2的入射强度。等离子体电子密度通过将观测到的谱线与理论谱线拟合来测量。计算中考虑了碰撞、多普勒和斯塔克展宽机制。我们的测量技术使我们能够确定电子密度和温度对距离目标表面的依赖关系，从1毫米(在铝等离子体中，Ne大约等于1018 cm-3, Te大约等于14 eV)到大约5毫米(Ne

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Atomic and Molecular Spectroscopy

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