Hard X-ray generation and plasma filament formation under interaction of femtosecond laser pulses with large molecular clustersстатья
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Дата последнего поиска статьи во внешних источниках: 15 февраля 2024 г.
Аннотация:We have demonstrated that the efficiency of hard X-ray generation (with energy 2−4 keV) fromthe femtosecond laser excitation (intensity I ∼ 10^16 W/cm2, pulse energy E ∼ 5 mJ) of large molecularclusters (SF6, CF3I) can reach ∼10^−6 (with yield ∼10^9 photons/J). It was shown that at maximal X-rayyield, the plasma filament is essentially non-uniform and has a multifocal structure. It was observed thatthe amplitude of the central and trailing spectral components of the chirped laser pulse decreases afterits interaction with the cluster target as a result of efficient laser energy absorption under self-focusingconditions.