Journal
PHYSICAL REVIEW LETTERS
Volume 108, Issue 13, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.135006
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Funding
- U.S. Department of Energy by the Lawrence Livermore National Laboratory [DE-AC52-07NA27344]
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We have imaged hard x-ray (> 100 keV) bremsstrahlung emission from energetic electrons slowing in a plastic ablator shell during indirectly driven implosions at the National Ignition Facility. We measure 570 J in electrons with E> 100 keV impinging on the fusion capsule under ignition drive conditions. This translates into an acceptable increase in the adiabat alpha, defined as the ratio of total deuterium-tritium fuel pressure to Fermi pressure, of 3.5%. The hard x-ray observables are consistent with detailed radiative-hydrodynamics simulations, including the sourcing and transport of these high energy electrons.
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