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High resolution X-ray emission spectra from picosecond laser irradiated Ge targets

Published online by Cambridge University Press:  19 June 2007

J. Abdallah
Affiliation:
T-4, Atomic and Optical Physics, Los Alamos National Laboratory, Los Alamos, New Mexico
D. Batani
Affiliation:
Dipartimento di Fisica “G.Occhialini”, Università di Milano-Bicocca, Milano, Italy
T. Desai
Affiliation:
Dipartimento di Fisica “G.Occhialini”, Università di Milano-Bicocca, Milano, Italy
G. Lucchini
Affiliation:
Dipartimento di Fisica “G.Occhialini”, Università di Milano-Bicocca, Milano, Italy
A. Faenov
Affiliation:
Joint Institute for High Temperature, Russian Academy of Sciences, Moscow, Russia
T. Pikuz
Affiliation:
Joint Institute for High Temperature, Russian Academy of Sciences, Moscow, Russia A.M. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow, Russia
A. Magunov
Affiliation:
Joint Institute for High Temperature, Russian Academy of Sciences, Moscow, Russia
V. Narayanan
Affiliation:
Dipartimento di Fisica “G.Occhialini”, Università di Milano-Bicocca, Milano, Italy
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Abstract

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Investigations of a high resolution X-ray emission spectrum in the range 0.66–0.75 nm obtained by irradiating a Germanium target with high-power p-polarized, 40 picosecond laser radiation at 532 nm wavelength was done. Spectra in the wavelength region of 2l-4l′ and 2l-5l′ L-shell transitions in F-like, Ne-like and Na-like germanium ions were recorded using the FSSR-2D spectrometer equipped with a spherically bent quartz crystal with a spectral resolution λ/Δλ better than 5000. Spectral lines were compared with theoretical values obtained using the LANL plasma kinetic code ATOMIC. Fair agreement between experimental and theoretical spectral lines has been observed, which allowed to measure enough high bulk electron temperature values of 560 eV and electron density of ∼1021 cm−3 in Ge plasma irradiated by rather small commercial high repetition rate Nd:YAG laser system.

Type
Research Article
Copyright
© 2007 Cambridge University Press