Spectroscopic analysis of non-LTE gold plasmas

Author

Hansen, S.B. ; Heeter, R.F. ; Foord, M.E. ; Fournier, K.B. ; Froula, D.H. ; Mackinnon, A.J. ; May, M.J. ; Schneider, M.B. ; Young, B.K.F.

Author_Institution

Lawrence Livermore Nat. Lab., CA, USA

fYear

2004

fDate

1-1 July 2004

Firstpage

346

Abstract

Summary form only given. Understanding and predicting the characteristics of non-LTE plasmas plays an important role in the development of inertial confinement fusion schemes. This paper presents a preliminary spectroscopic analysis of M-shell gold spectra collected over a wide range of electron and radiation temperatures. The 2.9-4.2 keV emission spectra are obtained from gold samples embedded in beryllium disks that are directly heated by the Omega laser, forming plasmas with electron densities near 10/sup 21/ cm/sup -3/ and electron temperatures from 1 to 3 keV. Some of the disks are placed within hohlraums, providing a finite radiation temperature near 150 eV. The spectra from these plasmas are analyzed to determine the variation of the gold charge state balance over a wide range of plasma conditions. The spectroscopic analysis is complemented by Thomson scattering and imaging of plasma expansion, which provide independent estimates of electron densities and temperatures.

Keywords

gold; plasma density; plasma diagnostics; plasma inertial confinement; plasma production by laser; plasma temperature; Au; Au-Be; M-shell gold spectra; Thomson scattering; beryllium disks; electron density; electron temperature; emission spectra; gold charge state balance; inertial confinement fusion; nonLTE gold plasmas; omega laser heating; plasma expansion imaging; radiation temperature; spectroscopic analysis; Electron emission; Gold; Inertial confinement; Laser fusion; Plasma confinement; Plasma density; Plasma properties; Plasma temperature; Spectroscopy; Temperature distribution;

fLanguage

English

Publisher

ieee

Conference_Titel

Plasma Science, 2004. ICOPS 2004. IEEE Conference Record - Abstracts. The 31st IEEE International Conference on

Conference_Location

Baltimore, MD, USA

ISSN

0730-9244

Print_ISBN

0-7803-8334-6

Type

conf

DOI

10.1109/PLASMA.2004.1340065

Filename

1340065