The effect of viewing angle on the spectral behavior of a Gd plasma source near 6.7 nm

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Title: The effect of viewing angle on the spectral behavior of a Gd plasma source near 6.7 nm
Authors: O'Gorman, Colm
Otsuka, Takamitsu
Yugami, Noboru
Jiang, Weihua
Endo, Akira
Li, Bowen
Cummins, T. (Thomas)
Dunne, Padraig
Sokell, Emma
O'Sullivan, Gerry
Higashiguchi, Takeshi
Permanent link: http://hdl.handle.net/10197/3689
Date: 2012
Abstract: We have demonstrated the effect of viewing angle on the extreme ultraviolet (EUV) emission spectra of gadolinium (Gd) near 6.7 nm. The spectra are shown to have a strong dependence on viewing angle when produced with a laser pulse duration of 10 ns, which may be attributed to absorption by low ion stages of Gd and an angular variation in the ion distribution. Absorption effects are less pronounced at a 150-ps pulse duration due to reduced opacity resulting from plasma expansion. Thus for evaluating source intensity it is necessary to allow for variation with both viewing angle and target orientation.
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 sources;Gadolinium;Plasma production by laser;Plasma transport processes
Subject LCSH: Gadolinium
Laser plasmas
Transport theory
DOI: 10.1063/1.3701593
Language: en
Status of Item: Peer reviewed
Appears in Collections:Physics Research Collection

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