Diagnostics of warm dense matter by high-resolution X-ray spectroscopy of hollow ions

A Ya Faenov,V E Fortov,R Kodama,S A Pikuz,I Yu Skobelev,T A Pikuz

doi:10.1017/s0263034614000743

A Ya Faenov, V E Fortov + Show 4 more

Open Access

https://doi.org/10.1017/s0263034614000743

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Abstract

AbstractThe short review on the possible applications of the hollow ion spectra for the diagnostics of the high-temperature plasma created by intensive laser and particle beams is presented. Because of the hollow ion spectra features are defined mainly by the mechanisms of their excitation, we consider the various types of the high-temperature plasma where different excitation processes are important. It is shown that like ordinary spectral lines, spectra of the hollow ions offer considerable diagnostic opportunities. At the present time, hollow ion spectra are used mainly to investigate plasma heated by X-ray radiation, but the hollow ions must be generated when plasma is heated by fast heavy ion beams too. In this case, the resultant substance state will be also characterized by solid-state density, and some spatial regions of targets will have relatively low temperatures, i.e., will be a nonideal plasma. It is emphasized that hollow ion spectra are promising diagnostic tool for both nonideal plasma and warm dense matter.

Highlights

The X-ray emissions from plasma produced by low contrast optical or infrared laser pulses of picosecond and femtosecond duration, begun being investigated in details during the past 20 years
In paper by Faenov et al (2012), it was shown that the key information regarding the existence of the dense cluster core at the moment of the main laser pulse arrival can be obtained by means of the observation of the hollow ion spectra
During the past years many observations have been done on such exotic atomic objects as hollow ions

Summary

Introduction

The X-ray emissions from plasma produced by low contrast optical or infrared laser pulses of picosecond and femtosecond duration, begun being investigated in details during the past 20 years. The radiation generated in the hot region will produce hollow ions in the cold region where the electron temperature is not high enough to ionize the ion outer-shells (Abdallah et al, 2000; Colgan et al, 2010).

Results

Conclusion