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Hot ion generation from nanostructured surfaces under intense, femtosecond irradiation

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arxiv physics/0610126 v1 pith:ZQGI5PSB submitted 2006-10-17 physics.plasm-ph physics.optics

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 This is my paper
classification physics.plasm-ph physics.optics
keywords targetspolishedcoppercunpelectronsfemtosecondintenseions
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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