Properties of well isolated warm dense matter produced by collision of high-speed plasma jets

The properties of warm dense matter are crucial for understanding the physics underlying star formation, stellar evolution, and inertial confinement fusion (ICF).We present soft X-ray measurements of a well-isolated warm dense plasma system produced by collision of high-speed plasma jets in ICF-related experiments with double-cone targets.The colliding plasma was found to exhibit a structure consisting of hotter inner core and colder outer shell.The core region emits continuum Planckian radiation with an effective temperature of 45 53 0 44 eV .. .The outer shell, which has electron density around 23 -3 10 cm and temperature of 34 26 2 12 eV .. , introduces absorption lines of carbon ions superposed on the continuum spectra.Two-dimensional radiation hydrodynamic simulations and synthetic X-ray spectral image reveal the detailed physical processes diagnosed with the experimental measurements.