Abstract
The ability to produce long-scale length (i.e. millimeter scale-length), homogeneous plasmas is of interest in studying a wide range of fundamental plasma processes. We present here a validated experimental platform to create and diagnose uniform plasmas with a density close or above the critical density. The target consists of a polyimide tube filled with an ultra low-density plastic foam where it was heated by x-rays, produced by a long pulse laser irradiating a copper foil placed at one end of the tube. The density and temperature of the ionized foam was retrieved by using x-ray radiography and proton radiography was used to verify the uniformity of the plasma. Plasma temperatures of 5–10 eV and densities around 1021 cm−3 are measured. This well-characterized platform of uniform density and temperature plasma is of interest for experiments using large-scale laser platforms conducting High Energy Density Physics investigations.
Highlights
The ability to produce long-scale length, homogeneous plasmas is of interest in studying a wide range of fundamental plasma processes
Producing long-scale length, uniform density plasmas has been a long-desired goal of the plasma physics community in order to study a wide range of fundamental processes related to electromagnetic waves or particles with plasmas while eliminating the effects of plasma gradients which can, for example, modify the growth of induced instabilities[1]
We report on the characterization, as achieved by x-ray[15] and proton[16,17] radiography, of the plasma that is contained within the cylinder and that was used in the study of ref
Summary
The ability to produce long-scale length (i.e. millimeter scale-length), homogeneous plasmas is of interest in studying a wide range of fundamental plasma processes. There are various ways to achieve this in the regime of low-density plasmas, i.e. densities
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