Determination of laser-induced plasma temperature

We develop a method to measure the evolution of the temperature of laser-in duced plasma during the initial period by using a plasma flash. The plasma emission is considered as blackbody radiation during the first detonation s tage,and bremsstrahlung radiation during its expansion period. Based on the Planck formula and the bremsstrahlung radiation formula,a the plasma tempe rature evolution during the initial period is obtained, which is helpful fo r the presented measurement methods to determine the temperature evolution during the entire process. (C) 2000 John Wiley & Sons, Inc.