Implosion Experiments using Glass Ablators for Direct-Drive Inertial Confinement Fusion
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Smalyuk-2010-Implosion Experiment.pdf
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Author(s)
Smalyuk, V. A.
Betti, R.
Delettrez, J. A.
Glebov, V. Yu.
Meyerhofer, D. D.
Radha, P. B.
Regan, S. P.
Sangster, T. C.
Sanz, J.
Seka, W.
Date Issued
April 2010
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Smalyuk, V.A. et al. "Implosion Experiments using Glass Ablators for Direct-Drive Inertial Confinement Fusion." Physical Review Letters 104.16 (2010): 165002. © 2010 The American Physical Society
Version
Final published version
Abstract
Direct-drive implosions with 20-μm-thick glass shells were conducted on the Omega Laser Facility to test the performance of high-Z glass ablators for direct-drive, inertial confinement fusion. The x-ray signal caused by hot electrons generated by two-plasmon-decay instability was reduced by more than ~40× and hot-electron temperature by ~2× in the glass compared to plastic ablators at ignition-relevant drive intensities of ~1×10[superscript 15] W/cm[superscript 2], suggesting reduced target preheat. The measured absorption and compression were close to 1D predictions. The measured soft x-ray production in the spectral range of ~2 to 4 keV was ~2× to 3× lower than 1D predictions, indicating that the shell preheat caused by soft x-rays is less than predicted. A direct-drive-ignition design based on glass ablators is introduced.
MIT Department
Massachusetts Institute of Technology. Plasma Science and Fusion Center
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.104.165002
