Intensity limits for propagation of 0.527 microm laser beams through large-scale-length plasmas for inertial confinement fusion.
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.
Niemann
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Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550, USA.
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Froula
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Gregori
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Jones
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Kirkwood
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Mackinnon
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Meezan
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Moody
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Suter
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Bahr
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Glenzer
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