X-ray absorption spectroscopy of exploding Al wire plasmas using X-pinch radiation sources

摘要

X-ray absorption spectroscopy is a powerful diagnostic technique useful for determining the charge state, temperature and density of plasmas under a wide range of conditions and situations. It has been employed for the last two decades to measure parameters of laser produced plasmas in the high energy density (HED) regime and to measure properties of the warm dense matter. Acquiring density, temperature and charge state information in a time and space resolved manner can shed much needed light on the properties of HED laboratory and astrophysical plasmas. In addition, if the spectral information is of sufficient quality, it can be used to better understand the atomic physics in relevant plasmas. Our particular interest was the study of the core-corona system generated in electrically exploded wires and wire array Z-pinches. This system is characterized by existence of a cold, <5eV, dense, >10