학술논문
Evidence of non-Maxwellian ion velocity distributions in spherical shock-driven implosions.
Document Type
Academic Journal
Author
Mannion OM; Sandia National Laboratories, Albuquerque, New Mexico 87185, USA.; Taitano WT; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.; Appelbe BD; Centre for Inertial Fusion Studies, The Blackett Laboratory, Imperial College, London SW72AZ, United Kingdom.; Crilly AJ; Centre for Inertial Fusion Studies, The Blackett Laboratory, Imperial College, London SW72AZ, United Kingdom.; Forrest CJ; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.; Glebov VY; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.; Knauer JP; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.; McKenty PW; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.; Mohamed ZL; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.; Stoeckl C; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.; Keenan BD; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.; Chittenden JP; Centre for Inertial Fusion Studies, The Blackett Laboratory, Imperial College, London SW72AZ, United Kingdom.; Adrian P; Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.; Frenje J; Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.; Kabadi N; Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.; Gatu Johnson M; Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.; Regan SP; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.
Source
Publisher: American Physical Society Country of Publication: United States NLM ID: 101676019 Publication Model: Print Cited Medium: Internet ISSN: 2470-0053 (Electronic) Linking ISSN: 24700045 NLM ISO Abbreviation: Phys Rev E Subsets: PubMed not MEDLINE; MEDLINE
Subject
Language
English
Abstract
The ion velocity distribution functions of thermonuclear plasmas generated by spherical laser direct drive implosions are studied using deuterium-tritium (DT) and deuterium-deuterium (DD) fusion neutron energy spectrum measurements. A hydrodynamic Maxwellian plasma model accurately describes measurements made from lower temperature (<10 keV), hydrodynamiclike plasmas, but is insufficient to describe measurements made from higher temperature more kineticlike plasmas. The high temperature measurements are more consistent with Vlasov-Fokker-Planck (VFP) simulation results which predict the presence of a bimodal plasma ion velocity distribution near peak neutron production. These measurements provide direct experimental evidence of non-Maxwellian ion velocity distributions in spherical shock driven implosions and provide useful data for benchmarking kinetic VFP simulations.