Intensity limits for propagation of 0.527 microm laser beams through large-scale-length plasmas for inertial confinement fusion |
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Authors: | Niemann C Divol L Froula D H Gregori G Jones O Kirkwood R K Mackinnon A J Meezan N B Moody J D Sorce C Suter L J Bahr R Seka W Glenzer S H |
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Institution: | Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550, USA. |
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Abstract: | We have established the intensity limits for propagation of a frequency-doubled (2omega, 527 nm) high intensity interaction beam through an underdense large-scale-length plasma. We observe good beam transmission at laser intensities at or below 2x10(14) W/cm(2) and a strong reduction at intensities up to 10(15) W/cm(2) due to the onset of parametric scattering instabilities. We show that temporal beam smoothing by spectral dispersion allows a factor of 2 higher intensities while keeping the beam spray constant, which establishes frequency-doubled light as an option for ignition and burn in inertial confinement fusion experiments. |
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