Coherent and incoherent XUV emission in helium and neon,laser-driven plasmas |
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Authors: | Crane JK Perry MD Strickland D Herman S Falcone RW |
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Institution: | Lawrence Livermore Nat. Lab., California Univ., CA ; |
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Abstract: | The authors present results of measurements of high-order harmonic generation and XUV spontaneous emission in helium and neon plasmas excited by a short pulse laser at intensities between 1014 and 5×1017 W/cm2. They compare the observed behavior of the harmonics with recent single atom calculations in helium. A wavelength dependence to the efficiency of harmonic generation that has not been previously reported is observed. Line emission from excited state transitions in Ne7+ in a short pulse laser-driven plasma is also observed. In particular, strong emission and a rapid recombination rate for the 9.8-nm (3d-2p) transition that is a possible candidate for a recombination-pumped X-ray laser is shown |
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