Neutron energy spectrum measurements from MagLIF implosions on Z
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Mannion, Owen↗
Engineering topics
Frenje, Johan
Publications and source records attributed to Frenje, Johan.
Evidence of non-Maxwellian ion velocity distributions in spherical shock-driven implosions
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. Furthermore, 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.
70 PLASMA PHYSICS AND FUSION TECHNOLOGY↗
Calibration of a compact recoil spectrometer for experiments on Z.
Abstract not provided.
Mannion, Owen↗
A Neutron Recoil-Spectrometer for Measuring Yield and Determining Liner Areal Densities at the Z Facility.
Abstract not provided.
Chang, Cody↗
γ-ray spectrometry for diagnosing high-repetition-rate Laser Direct-Drive Inertial-Fusion-Energy implosions.
Abstract not provided.
Frenje, Johan↗
Thermal decoupling of deuterons and tritons during the shock-convergence phase in Inertial Confinement Fusion implosions.
Abstract not provided.
Kabadi, Neel↗
MRSt S Specifications Report
The MRSt spectrometer is a magnetic spectrometer designed for momentum analyzing deuterons (10.7 – 14.2 MeV). The MRSt spectrometer will be attached to the target chamber of the National Ignition Facility (NIF) at Lawrence Livermore National Laboratory (LLNS), Livermore, California. This document defines the technical requirements for the design, analysis, fabrication, inspection, testing and delivery of the complete set of magnets, vacuum chambers, and accessories to become part of the spectrometer. The interface issues, including the support structures, need to be defined later by LLNS and the vendor, which will require time and dialog before a solution can be found. This “Specification Report for the MRSt-S System”, January 19, 2020 is based on and supersedes an earlier version “Specification Report for the MRSt-S System”, May 1, 2019 The vendor shall check these specifications for possible conflicts between statements in this document. Possible solutions to any such conflicts should be included in the proposal submitted by the vendor. The proposal shall also include the delivery FOB destination LLNS.
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND ↗