Using time-resolved penumbral imaging to measure low x-ray emission signals from capsule implosions at the NIF
Abstract not provided
42 ENGINEERING↗
Engineering topics
Redmer, R
Publications and source records attributed to Redmer, R.
Ionization Measurements in 30-fold Compressed, Near-Degenerate Plasmas
Abstract not provided
42 ENGINEERING↗
Simulating x-ray Thomson scattering signals from high-density, millimetre-scale plasmas at the National Ignition Facility
Abstract not provided
42 ENGINEERING↗
JUPITER MODELS WITH IMPROVED AB INITIO HYDROGEN EQUATION OF STATE (H-REOS.2)
The amount and distribution of heavy elements in Jupiter gives indications on the process of its formation and evolution. Core mass and metallicity predictions, however, depend on the equations of state (EOSs) used and on model assumptions. We present an improved ab initio hydrogen EOS, H-REOS.2, and compute the internal structure and thermal evolution of Jupiter within the standard three-layer approach. The advance over our previous Jupiter models with H-REOS.1 by Nettelmann et al. is that the new models are also consistent with the observed {approx}> 2 times solar heavy element abundances in Jupiter's atmosphere. Such models have a rock core mass M{sub c} = 0-8 M{sub Circled-Plus }, total mass of heavy elements M{sub Z} = 28-32 M{sub Circled-Plus }, a deep internal layer boundary at {>=}4 Mbar, and a cooling time of 4.4-5.0 Gyr when assuming homogeneous evolution. We also calculate two-layer models in the manner of Militzer et al. and find a comparable large core of 16-21 M{sub Circled-Plus }, out of which {approx}11 M{sub Circled-Plus} is helium, but a significantly higher envelope metallicity of 4.5 times solar. According to our preferred three-layer models, neither the characteristic frequency ({nu}{sub 0} {approx} 156 {mu}Hz) nor the normalized moment of inertia ({lambda} {approx}0.276) is sensitive to the core mass but accurate measurements could well help to rule out some classes of models.
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