Hard X-ray generation and plasma filament formation under interaction of femtosecond laser pulses with large molecular clusters

We have demonstrated that the efficiency of hard X-ray generation (with energy 2 − 4 keV) from the femtosecond laser excitation (intensity I ∼ 10 16 W/cm 2 , pulse energy E ∼ 5 mJ) of large molecular clusters (SF 6 , CF 3 I) can reach ∼ 10 −6 (with yield ∼ 10 9 photons/J). It was shown that at maxim...

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Bibliographic Details
Published in:The European physical journal. D, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2013-03, Vol.67 (3), Article 55
Main Authors: Gordienko, Vyacheslav M., Dzhidzhoev, Murat S., Zhvaniya, Irina A., Platonenko, Viktor T., Trubnikov, Dmitriy N., Fedorov, Denis O.
Format: Article
Language:English
Subjects:
Applications of Nonlinear Dynamics and Chaos Theory
Atomic
Molecular
Optical and Plasma Physics
Physical Chemistry
Physics
Physics and Astronomy
Quantum Information Technology
Quantum Physics
Regular Article
Spectroscopy/Spectrometry
Spintronics
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Summary:We have demonstrated that the efficiency of hard X-ray generation (with energy 2 − 4 keV) from the femtosecond laser excitation (intensity I ∼ 10 16 W/cm 2 , pulse energy E ∼ 5 mJ) of large molecular clusters (SF 6 , CF 3 I) can reach ∼ 10 −6 (with yield ∼ 10 9 photons/J). It was shown that at maximal X-ray yield, the plasma filament is essentially non-uniform and has a multifocal structure. It was observed that the amplitude of the central and trailing spectral components of the chirped laser pulse decreases after its interaction with the cluster target as a result of efficient laser energy absorption under self-focusing conditions.
ISSN:1434-6060
1434-6079
DOI:10.1140/epjd/e2013-30497-7