Charged Particle Stopping Power Effects on Ignition: Some Results from an Exact Calculation

Details Charged Particle Stopping Power Effects on Ignition: Some Results from an Exact Calculation Charged Particle Stopping Power Effects on Ignition: Some Results from an Exact Calculation

2007-12-06

arxiv.org/abs/0712.1023v2

Physics of Plasmas 15 (2008) 056302

Physics

Plasma Physics

19 pages, 3 Figures, Published in the proceedings for the 49th Annual meeting of the APS Division of Plasma Physics, Orlando F

Scientific paper

10.1063/1.2840134

A completely rigorous first-principles calculation of the charged particle stopping power has recently been performed by Brown, Preston, and Singleton (BPS). This calculation is exact to leading and next-to-leading order in the plasma number density, including an exact treatment of two-body quantum scattering. The BPS calculation is therefore extremely accurate in the plasma regime realized during the ignition and burn of an inertial confinement fusion capsule. For deuterium-tritium fusion, the 3.5 MeV alpha particle range tends to be 20-30% longer than most models in the literature have predicted, and the energy deposition into the ions tends to be smaller. Preliminary numerical simulations indicate that this increases the rho-R required to achieve ignition.

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