Optimizing conversion efficiency and reducing ion energy in a laser-produced Gd plasma

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Title: Optimizing conversion efficiency and reducing ion energy in a laser-produced Gd plasma
Authors: Cummins, T. (Thomas)
Otsuka, Takamitsu
Yugami, Noboru
Jiang, Weihua
Endo, Akira
Li, Bowen
O'Gorman, Colm
Dunne, Padraig
Sokell, Emma
O'Sullivan, Gerry
Higashiguchi, Takeshi
Permanent link: http://hdl.handle.net/10197/3688
Date: 2012
Abstract: We have demonstrated an efficient extreme ultraviolet (EUV) source at 6.7 nm by irradiating Gd targets with 0.8 and 1.06 μm laser pulses of 140 fs to 10 ns duration. Maximum conversion efficiency of 0.4% was observed within a 0.6% bandwidth. A Faraday cup observed ion yield and time of flight signals for ions from plasmas generated by each laser. Ion kinetic energy was lower for shorter pulse durations, which yielded higher electron temperatures required for efficient EUV emission, due to higher laser intensity. Picosecond laser pulses were found to be the best suited to 6.7 nm EUV source generation.
Funding Details: Science Foundation Ireland
Type of material: Journal Article
Publisher: American Institute of Physics
Copyright (published version): 2012 American Institute of Physics
Keywords: Plasma;Gadolinium;Plasma kinetic theory;Plasma light propagation;Plasma production by laser;Spectroscopic light sources
Subject LCSH: Gadolinium
Laser plasmas
DOI: 10.1063/1.3684242
Language: en
Status of Item: Peer reviewed
Appears in Collections:Physics Research Collection

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