Using the ROSS optical streak camera as a tool to understand laboratory experiments of laser-driven magnetized shock waves

Liao, Andy; Hartigan, Patrick; Fiksel, Gennady; Blue, Brent; Graham, Peter; Foster, John; Kuranz, Carolyn

doi:10.1017/hpl.2018.17

Title: Using the ROSS optical streak camera as a tool to understand laboratory experiments of laser-driven magnetized shock waves

Journal Article · Mon May 21 00:00:00 EDT 2018 · High Power Laser Science and Engineering

DOI:https://doi.org/10.1017/hpl.2018.17· OSTI ID:1765290

Liao, Andy ^[1]; Hartigan, Patrick ^[1]; Fiksel, Gennady ^[2]; Blue, Brent ^[3]; Graham, Peter ^[4]; Foster, John ^[4]; Kuranz, Carolyn ^[2]

Rice Univ., Houston, TX (United States)
Univ. of Michigan, Ann Arbor, MI (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Atomic Weapons Establishment (AWE), Berkshire (United Kingdom)

Supersonic flows with high Mach number are ubiquitous in astrophysics. High-powered lasers also have the ability to drive high Mach number, radiating shock waves in laboratory plasmas, and recent experiments along these lines have made it possible to recreate analogs of high Mach-number astrophysical flows under controlled conditions. Streak cameras such as the Rochester optical streak system (ROSS) are particularly helpful in diagnosing such experiments, because they acquire spatially resolved measurements of the radiating gas continuously over a large time interval, making it easy to observe how any shock waves and ablation fronts present in the system evolve with time. This paper summarizes new ROSS observations of a laboratory analog of the collision of a stellar wind with an ablating planetary atmosphere embedded within a magnetosphere. We find good agreement between the observed ROSS data and numerical models obtained with the FLASH code, but only when the effects of optical depth are properly taken into account.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Rice Univ., Houston, TX (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344; NA0002722

OSTI ID:: 1765290

Alternate ID(s):: OSTI ID: 1786961

Report Number(s):: LLNL-JRNL-817338; 1027297; TRN: US2206231

Journal Information:: High Power Laser Science and Engineering, Vol. 6; ISSN 2095-4719

Publisher:: Cambridge University PressCopyright Statement

Country of Publication:: United States

Language:: English

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