PPPS 2019

Session

4.4 High Energy Density Matter

O7C

27 Jun 2019, 10:00

DoubleTree at the Entrance to Universal Orlando

Conveners

4.4 High Energy Density Matter

• Mark Hess (Sandia National Laboratories)

980. A Study of Magnetized Jet Stability Using High Energy Density Plasmas

Hannah Hasson (University of Rochester), Pierre Gourdain (University of Rochester)

27/06/2019, 10:00

4.4 High Energy Density Matter

Invited

Astrophysical jets are ubiquitous structures observed in diverse environments, ranging in scale from young stellar objects to supermassive black holes. Most theories assume a gravitational engine to be responsible for generating the powerful axial flows of the jet from an accretion disk. However, the processes that maintain jet collimation and stability remain poorly understood. To understand...

1089. Thomson Scattering Measurements of Bow-shocks in Radiatively-cooled Magnetically Accelerated Plasma Flows

Simon Bott-Suzuki (University of California San Diego)

27/06/2019, 10:30

4.4 High Energy Density Matter

Oral

Shock formation in dense, hot plasma flows where radiation loss is important continues to be an interesting topic for a variety of physics areas in HEDP and beyond. Characterization of the upstream and downstream plasma conditions can help determine the energy balance across the shock and access fundamental parameters including the plasma compressibility. Pulsed power-driven, large spatial...

1153. An absorption spectroscopy platform to measure photoionization fronts in the laboratory

Heath LeFevre (University of Michigan)

27/06/2019, 10:45

4.4 High Energy Density Matter

Oral

In present day star forming regions, large, young stars introduce ionizing radiation sources to cold gas clouds. This radiation acts to heat the surrounding gas cloud, causing expansion and a rocket effect. The heat wave that propagates through the gas cloud, causing these changes, is driven by the ionizing radiation in the high-energy tail of the stellar emission, which we call a...

663. Nernst Thermomagnetic Waves in Magnetized High Energy Density Plasmas

Dr Alexander Velikovich (Naval Research Laboratory)

27/06/2019, 11:00

4.4 High Energy Density Matter

Invited

The Nernst effect plays the dominant role in the subsonic transport of magnetic flux in high-energy-density (HED) plasmas, where the plasma beta is high, and the temperature diffusivity is much greater than the magnetic diffusivity [1]. This is the parameter range characteristic of MagLIF and other magneto-inertial fusion approaches near stagnation. We demonstrate the transport of magnetic...

545. Electrical explosions of cylindrical wire arrays in different materials

Dr David Yanuka (Imperial College London)

27/06/2019, 11:30

4.4 High Energy Density Matter

Oral

Underwater electrical wire explosions have attracted much attention in the recent decade due to the high energy density deposition into the wire, which is possible because of the high breakdown voltage of water compared to air and vacuum, preventing surface breakdown. Moreover, water’s small compressibility also contributes to higher energy density deposition, with the plasma maintaining a...

1092. Exploring Properties of Warm Dense Matter Using Microsecond Timescale Pulse Power Drive

Robert Reinovsky (LANL)

27/06/2019, 11:45

4.4 High Energy Density Matter

Oral

The properties, such as equation of state, electrical and thermal conductivity, of warm dense matter is an emerging area of study that applies to the astrophysics of gas giants; to the early stages of ICF capsule implosion; to the initial process of wire or foil cylinder explosions and to the formation of surface plasmas on conductors under fast rising high current densities.

“Warm-dense...