A plasma deflagration accelerator as a platform for laboratory astrophysics

作者：Underwood Thomas C; Loebner Keith T K; Cappelli Mark A

来源：High Energy Density Physics, 2017, 23: 73-80.

DOI：10.1016/j.hedp.2017.03.004

• Laboratory astrophysics
• Astrophysical jets
• Scaling laws
• Magnetohydrodynamics (MHD)

The replication of astrophysical flows in the laboratory is critical for isolating particular phenomena and dynamics that appear in complex, highly-coupled natural systems. In particular, plasma jets are observed in astrophysical contexts at a variety of scales, typically at high magnetic Reynolds number and driven by internal currents. In this paper, we present detailed measurements of the plasma parameters within deflagration -produced plasma jets, the scaling of these parameters against both machine operating conditions and the corresponding astrophysical phenomena. Using optical and spectroscopic diagnostics, including Schlieren cinematography, we demonstrate the production of current-driven plasma jets of similar to 100 km/s and magnetic Reynolds numbers of similar to 100, and discuss the dynamics of their acceleration into vacuum. The results of this study will contribute to the reproduction of various types of astrophysical jets in the laboratory and indicate the ability to further probe active research areas such as jet collimation, stability, and interaction.

• 出版日期2017-6