DEMONSTRATION OF LASER-INDUCED X-RAY GENERATION IN AN EXPANDING LASER-PRODUCED PLASMA

X-ray emission at 10 nm stimulated by visible laser radiation at 614.2 nm in a beryllium laser produced plasma was investigated. A method of laser induced quenching;of metastable ions was applied to He-like Be2 + ions in the 1s2s(1)S(0) state. Laser excitation to the 1s2p(1)P(1) s tate was followed by an intense x-ray emission at a resonance 1s(21)S( 0)-1s2p P-1(1) transition. Time, angular, and polarization characteris tics of the radiation were studied; a linear polarization and a dipole type angular distribution have been found. The total energy radiated in a 1,5 ns pulse amounted to 10 mu J.