Details

Autor(en) / Beteiligte

• Walsh, C A
• Chittenden, J P
• McGlinchey, K
• Niasse, N P L
• Appelbe, B D

Titel

Self-Generated Magnetic Fields in the Stagnation Phase of Indirect-Drive Implosions on the National Ignition Facility

Ist Teil von

• Physical review letters, 2017-04, Vol.118 (15), p.155001-155001, Article 155001

Ort / Verlag

United States

Erscheinungsjahr

2017

Link zum Volltext

Quelle

PROLA

Beschreibungen/Notizen

• Three-dimensional extended-magnetohydrodynamic simulations of the stagnation phase of inertial confinement fusion implosion experiments at the National Ignition Facility are presented, showing self-generated magnetic fields over 10^{4}  T. Angular high mode-number perturbations develop large magnetic fields, but are localized to the cold, dense hot-spot surface, which is hard to magnetize. When low-mode perturbations are also present, the magnetic fields are injected into the hot core, reaching significant magnetizations, with peak local thermal conductivity reductions greater than 90%. However, Righi-Leduc heat transport effectively cools the hot spot and lowers the neutron spectra-inferred ion temperatures compared to the unmagnetized case. The Nernst effect qualitatively changes the results by demagnetizing the hot-spot core, while increasing magnetizations at the edge and near regions of large heat loss.