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Properties of high-z plasma produced by 1-picosecond laser pulse

The results of investigation of ion emission from various solid targets, irradiated with an intense 1-ps laser pulse are reported. The ion measurements were based on the time- of-flight method and were performed with the use of ion collectors and electrostatic ion-energy analyzer. The emission of highly-charged heavy ions is demonstrated for the first time for a plasma produced with an ultrashort laser pulse. Ion collector signals show two groups of ions existence of which corresponds to different mechanisms of their generation. Ion yield depends essentially on the laser beam focusing conditions. A production of intense streams of highly charged, high energy ions was observed.