Abstract
We investigated the ion characteristics in picosecond laser plasma at laser radiation intensity of up to 2 × 10 18 W/cm 2 . Our experimental observations of X-ray spectral line profiles confirmed the presence of a great quantity of high-energy ions (∼ 1 MeV) in laser plasma. Besides, by the L yα Doppler profile's red shift we revealed the high-energy ion motion directed inward the target. For this phenomenon we suggest our theoretical model. The high energy tail in the energy spectrum of ions in laser plasmas can be explained by the pinch effect. The effective way for production of beams of charged particles in laser plasmas is the electric drift of these particles in electromagnetic fields generated in the laser-produced plasmas.
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