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Title: Exploring the crossover between high-energy-density plasma and ultracold neutral plasma physics

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/1.5119144· OSTI ID:1777877

In this paper, we present ideas that were part of the miniconference on the crossover between High Energy Density Plasmas (HEDP) and Ultracold Neutral Plasmas (UNPs) at the 60th Annual Meeting of the American Physical Society Division of Plasma Physics, November 2018. We give an overview of UNP experiments with an emphasis on measurements of the time-evolving ion density and velocity distributions, the electron-ion thermalization rate, and plasma self-assembly—all just inside the strongly coupled plasma regime. We also present theoretical and computational models that were developed to understand a subset of HEDP experiments. However, because HEDP experiments display similar degrees of strong coupling, many aspects of these models can be vetted using precision studies of UNPs. This comparison is important because some statistical assumptions used for ideal plasmas are of questionable validity in the strongly coupled plasma regime. We summarize two theoretical approaches that extend kinetic theories into the strong-coupling regime and show good agreement for momentum transfer and self-diffusion. As capabilities improve, both computationally and experimentally, UNP measurements may help guide the ongoing development of HEDP appropriate plasma models. Future opportunities in viscosity, energy relaxation, and magnetized plasmas are discussed.

Research Organization:
Univ. of Iowa, Iowa City, IA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Fusion Energy Sciences (FES); US Air Force Office of Scientific Research (AFOSR); National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
SC0016159; SC0014455; AC52-07NA27344; FA9550-17-1-0343; FA9550-17-1-0302; FA9550-17-1-0391; FA9550-12-1-0222; FA9550-17-1-0148; PHY-1453736; PHY-1500376
OSTI ID:
1777877
Alternate ID(s):
OSTI ID: 1571680; OSTI ID: 1899759
Report Number(s):
LLNL-JRNL-779426; TRN: US2209498
Journal Information:
Physics of Plasmas, Vol. 26, Issue 10; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 22 works
Citation information provided by
Web of Science

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