The use of geometric effects in diagnosing ion density in ICF-related dot spectroscopy experiments
File(s)The use of geometric effects .pdf (687.19 KB)
Accepted version
Author(s)
Perez-Callejo, G
Liedahl, DA
Schneider, MB
Rose, SJ
Wark, JS
Type
Journal Article
Abstract
We describe a method to calculate the ion density of High Energy Density (HED) cylindrical plasmas used in dot spectroscopy experiments. This method requires only spectroscopic measurements of the Heα region obtained from two views (Face-on and Side-on). We make use of the fact that the geometry of the plasma affects the observed flux of optically thick lines. The ion density can be derived from the aspect ratio (height-to-radius) of the cylinder and the optical depth of the Heα-y line (1s2p 3P1 → 1s2 1S0). The aspect ratio and the optical depth of the y line are obtained from the spectra using ratios measured from the two directions of emission of the optically thick Heα-w line (1s2p 1P1 → 1s2 1S0) and the ratio of the optically thick to thin lines. The method can be applied to mid-Z elements at ion densities of 1019– and temperatures of a the order of keV, which is a relevant regime for Inertial Confinement Fusion (ICF) experiments.
Date Issued
2019-01-28
Online Publication Date
2020-01-28T07:00:20Z
Date Acceptance
2019-01-28
Citation
High Energy Density Physics, 2019, 30, pp.45-51
ISSN
1574-1818
Publisher
Elsevier
Start Page
45
End Page
51
Journal / Book Title
High Energy Density Physics
Volume
30
Copyright Statement
© 2019 Elsevier B.V. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000459339800007&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Physics, Fluids & Plasmas
Physics
Ion density
Dot spectroscopy
Cylindrical plasmas
X-ray spectroscopy
X-RAY SPECTROSCOPY
HELIUM-LIKE IONS
LASER-PRODUCED PLASMAS
ELECTRON-DENSITY
LINE RATIOS
EXTREME-ULTRAVIOLET
OPTICALLY THICK
TEMPERATURE
RESONANCE
EMISSION
Publication Status
Published
Date Publish Online
2019-01-28