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arXiv physics/0610126physics.plasm-phphysics.optics
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飞秒强辐射下纳米结构表面的热离子产生

Hot ion generation from nanostructured surfaces under intense, femtosecond irradiation

S. Bagchi, P. Prem Kiran, M. K. Bhuyan, S. Bose, P. Ayyub, M. Krishnamurthy, G. Ravindra Kumar

摘要:

我们提出了纳米结构表面对来自强(5-36 Petwatt per sq.cm)飞秒激光产生的等离子体的离子和电子的发射的影响。从光学抛光的铜靶涂覆有铜纳米颗粒(CuNP)的电子被观察到比那些未涂覆的抛光靶热。在14-74 keV范围内的离子,观察到近两倍的增强,而离子产率在74-2000 keV范围内减少了2倍。使用大面积法拉第杯测量的总离子产率是更多的从铜NP目标比抛光铜目标,表明由于表面调制离子束发散增加。

英文摘要:

We present the effect of a nanostructured surface on the emission of ions and electrons from intense (5-36 Petwatt per sq.cm) femtosecond laser produced plasmas. Electrons from optically polished copper targets coated with copper nanoparticles (CuNP) are observed to be hotter than those from uncoated polished targets. A nearly two-fold enhancement is observed for ions in the range 14-74 keV, while ion yield decreases by a factor of 2 in the 74-2000 keV range. The total ion yields measured using a large area Faraday cup are more from CuNP targets than those from polished Cu targets, indicating increased ion beam divergence due to surface modulations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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