Turbulent stagnation in a z-pinch plasma

Abstract

The ion kinetic energy in a stagnating plasma was previously determined by Kroupp et al. (Kroupp et al., 2011), from Doppler-dominated lineshapes augmented by measurements of plasma properties and assuming a uniform-plasma model. Notably, the energy was found to be dominantly stored in hydrodynamic flow. Here, we advance a new description of this stagnation as supersonically turbulent. Such turbulence implies a non-uniform density distribution. We demonstrate how to re-analyze the spectroscopic data consistent with the turbulent picture, and show this leads to better concordance of the overconstrained spectroscopic measurements, while also substantially lowering the inferred mean density.

6 pages, 2 figures, 1 table

References in corpus (10)

• Analytical theory for the initial mass function: CO clumps and prestellar cores
• The Density Probability Distribution in Compressible Isothermal Turbulence: Solenoidal versus Compressive Forcing
• Driving Turbulence and Triggering Star Formation by Ionizing Radiation
• Variations in Stellar Clustering with Environment: Dispersed Star Formation and the Origin of Faint Fuzzies
• The density structure and star formation rate of non-isothermal polytropic turbulence
• Density Probability Distribution Functions in Supersonic Hydrodynamic and MHD Turbulence
• Sudden viscous dissipation of compressing turbulence
• Mach number study of supersonic turbulence: The properties of the density field
• Compressing turbulence and sudden viscous dissipation with compression-dependent ionization state
• A lower bound on adiabatic heating of compressed turbulence for simulation and model validation

Cited by in corpus (5)

• Review of the 10th Non-LTE Code Comparison Workshop
• As a matter of force - Systematic biases in idealized turbulence simulations
• Bulk hydrodynamic stability and turbulent saturation in compressing hot spots
• Self-consistent feedback mechanism for the sudden viscous dissipation of finite-Mach-number compressing turbulence
• Magnetized Decaying Turbulence in the Weakly Compressible Taylor-Green Vortex