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Low temperature photoionized Ne plasmas induced by laser-plasma EUV sources

Published online by Cambridge University Press:  20 March 2015

A. Bartnik ,
H. Fiedorowicz ,
T. Fok ,
R. Jarocki ,
M. Szczurek  and
P. Wachulak
A. Bartnik*
Affiliation:
Institute of Optoelectronics, Military University of Technology, Warsaw, Poland
H. Fiedorowicz
Affiliation:
Institute of Optoelectronics, Military University of Technology, Warsaw, Poland
T. Fok
Affiliation:
Institute of Optoelectronics, Military University of Technology, Warsaw, Poland
R. Jarocki
Affiliation:
Institute of Optoelectronics, Military University of Technology, Warsaw, Poland
M. Szczurek
Affiliation:
Institute of Optoelectronics, Military University of Technology, Warsaw, Poland
P. Wachulak
Affiliation:
Institute of Optoelectronics, Military University of Technology, Warsaw, Poland
*
Address correspondence and reprint requests to: A. Bartnik, Military University of Technology, Warsaw, Mazowsze, Poland. Email: [email protected]
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Abstract

In this work, two laser-produced plasma (LPP) sources – extreme ultraviolet (EUV) and a LPP soft X-ray (SXR) source were used to create Ne photoionized plasmas. A radiation beam was focused onto a gas stream, injected into a vacuum chamber synchronously with the radiation pulse. EUV radiation spanned a wide spectral range with pronounced maximum centered at λ≈11 nm, while in case of the SXR source spectral maximum was at λ≈1.4 nm. Emission spectra of photoionized plasmas created this way were measured in a wide spectral range λ = 10–100 nm. The dominating spectral lines originated from singly charged ions (Ne II) and neutral atoms (Ne I). For the highest radiation fluence, spectral lines originating from Ne III and even Ne IV species were detected. Differences between the experimental spectra, obtained for all irradiation conditions, were analyzed. They were attributed either to different fluence or spectral distribution of driving photons.

Keywords

Extreme ultravioletLaser plasmaPhotoionizationSoft X rays
Type
Research Article
Information
Laser and Particle Beams , Volume 33 , Issue 2 , June 2015 , pp. 193 - 200
Copyright
Copyright © Cambridge University Press 2015 

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