Direct asymmetry measurement of temperature and density spatial distributions in inertial confinement fusion plasmas from pinhole space-resolved spectra

TL;DR

This paper presents the first direct measurement of two-dimensional temperature and density distributions in an inertial confinement fusion core using space-resolved spectra, revealing detailed asymmetries.

Contribution

It introduces a novel diagnostic method combining pinhole imaging and spectral analysis to map temperature and density in ICF plasmas with high spatial resolution.

Findings

First 2D temperature and density images of ICF core

Detected asymmetries in core shape, size, and distributions

Enhanced understanding of implosion core dynamics

Abstract

Two-dimensional space-resolved temperature and density images of an inertial confinement fusion (ICF) implosion core have been diagnosed for the first time. Argon-doped, direct-drive ICF experiments were performed at the Omega Laser Facility and a collection of two-dimensional space-resolved spectra were obtained from an array of gated, spectrally resolved pinhole images recorded by a multi-monochromatic x-ray imager. Detailed spectral analysis revealed asymmetries of the core not just in shape and size but in the temperature and density spatial distributions, thus characterizing the core with an unprecedented level of detail.