The properties of plasmas produced by high power laser were investigated. The electron temperatures of plasmas from different targets were estimated by the measurement of soft x-ray. Time _??_ variations of the reflected laser light from plasma were also investigated.
From the time of flight measurements with a Faraday cage and an electrostatic energy analyzer, the different charged ion could be separated and ion temperatures and drift velocities were obtained from their velocity profiles.
No influence of laser pulse duration to the temperature was observed in the cases of durations 2 ns, 4 ns and 10 ns. The experimental results for fast rising laser pulse were discussed and compared with those for slow rising one.
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