Investigation of the instabilities of an expanding plasma created during ablation of solid targets by intense femtosecond laser pulses

摘要

The expansion of a laser plasma created during irradiation of a solid target with intense femtosecond pulse is studied. The combined use of interferometry and depolarization measurements allowed us to reconstruct the spatial distribution of the plasma density and revealed the development of small-scale instabilities accompanied by megagauss magnetic field generation. The nature of the observed instabilities is discussed.