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.
Mannion, Owen M., et al. "Evidence of non-Maxwellian ion velocity distributions in spherical shock-driven implosions." Physical Review. E, vol. 108, no. 3, Sep. 2023. https://doi.org/10.1103/physreve.108.035201
Mannion, Owen M., Taitano, William T., Appelbe, Brian D., Crilly, Aidan J., Forrest, Chad J., Glebov, Vladimir Yu, Knauer, James P., McKenty, Patrick W., Mohamed, Zaarah L., Stoeckl, Christian, Keenan, Brett D., Chittenden, Jerry P., Adrian, Patrick, Frenje, Johan, Kabadi, N., Johnson, Maria Gatu, & Regan, Sean P. (2023). Evidence of non-Maxwellian ion velocity distributions in spherical shock-driven implosions. Physical Review. E, 108(3). https://doi.org/10.1103/physreve.108.035201
Mannion, Owen M., Taitano, William T., Appelbe, Brian D., et al., "Evidence of non-Maxwellian ion velocity distributions in spherical shock-driven implosions," Physical Review. E 108, no. 3 (2023), https://doi.org/10.1103/physreve.108.035201
@article{osti_2008335,
author = {Mannion, Owen M. and Taitano, William T. and Appelbe, Brian D. and Crilly, Aidan J. and Forrest, Chad J. and Glebov, Vladimir Yu and Knauer, James P. and McKenty, Patrick W. and Mohamed, Zaarah L. and Stoeckl, Christian and others},
title = {Evidence of non-Maxwellian ion velocity distributions in spherical shock-driven implosions},
annote = {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.},
doi = {10.1103/physreve.108.035201},
url = {https://www.osti.gov/biblio/2008335},
journal = {Physical Review. E},
issn = {ISSN 2470-0045},
number = {3},
volume = {108},
place = {United States},
publisher = {American Physical Society (APS)},
year = {2023},
month = {09}}
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 964https://doi.org/10.1016/j.nima.2020.163774