skip to main content

Title: Influence of laser pulse duration on extreme ultraviolet and ion emission features from tin plasmas

We investigated the role of laser pulse duration and intensity on extreme ultraviolet (EUV) generation and ion emission from a laser produced Sn plasma. For producing plasmas, planar slabs of pure Sn were irradiated with 1064 nm Nd:YAG laser pulses with varying pulse duration (5–20 ns) and intensity. Experimental results performed at CMUXE indicate that the conversion efficiency (CE) of the EUV radiation strongly depend on laser pulse width and intensity, with a maximum CE of ∼2.0% measured for the shortest laser pulse width used (5 ns). Faraday Cup ion analysis of Sn plasma showed that the ion flux kinetic profiles are shifted to higher energy side with the reduction in laser pulse duration and narrower ion kinetic profiles are obtained for the longest pulse width used. However, our initial results showed that at a constant laser energy, the ion flux is more or less constant regardless of the excitation laser pulse width. The enhanced EUV emission obtained at shortest laser pulse duration studied is related to efficient laser-plasma reheating supported by presence of higher energy ions at these pulse durations.
Authors:
 [1] ;  [2] ; ; ; ;  [3] ;  [1]
  1. HiLASE Project, Department of Diode-Pumped Lasers, Institute of Physics of the ASCR, Na Slovance 2, 18221 Prague (Czech Republic)
  2. (CMUXE), Purdue University, West Lafayette, Indiana 47907 (United States)
  3. School of Nuclear Engineering and Center for Materials Under Extreme Environment (CMUXE), Purdue University, West Lafayette, Indiana 47907 (United States)
Publication Date:
OSTI Identifier:
22252194
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 3; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; EFFICIENCY; EMISSION; EXCITATION; EXTREME ULTRAVIOLET RADIATION; FARADAY CUPS; IONS; IRRADIATION; NEODYMIUM LASERS; PLASMA; PULSES