HIGH-RESOLUTION X-RAY-DIAGNOSTICS OF HIGH-TEMPERATURE PLASMA WITH PICOSECOND TIME RESOLUTION

X-Ray spectral diagnostics of plasma, produced on the surface of solid targets by two successive nano- and picosecond pulses following one a nother with an interval of 1.2 ns, was performed with high time resolu tion (down to 2 ps) and high spectral resolution (up to 5X10(3)). The heating and the increase in the density of the preplasma, produced by the nanosecond pulse as a result of the action of a short (1-ps) inten se pulse, was observed. The plasma parameters were determined at diffe rent stages of heating. (C) 1995 American Institute of Physics.