Electron density diagnostics by Fe XXII line intensity ratio

1987 ◽  
Vol 123 (8) ◽  
pp. 405-409 ◽  
Author(s):  
Kuniaki Masai ◽  
Takako Kato
Keyword(s):  
Electron Density ◽  
Line Intensity ◽  
Intensity Ratio ◽  
Line Intensity Ratio ◽  
Density Diagnostics

scholarly journals Electron Density Enhancement During an UV Explosive Event

2001 ◽  
Vol 203 ◽  
pp. 407-409
Author(s):  
M. S. Madjarska ◽  
J. G. Doyle ◽  
L. Teriaca
Keyword(s):  
High Resolution ◽  
Electron Density ◽  
Line Intensity ◽  
Intensity Ratio ◽  
Mhd Simulations ◽  
Line Intensity Ratio ◽  
Density Enhancement ◽  
Sensitive Line ◽  
Clear Increase ◽  
Explosive Event

High resolution temporal observations performed with the SUMER spectrometer on SoHO provide us the opportunity to investigate the electron density variations in the solar mid-transition region due to explosive event-like phenomena. The O IV 1401.16/1404.81 density sensitive line intensity ratio shows a clear increase during a strong explosive event, corresponding to an electron density enhancement of a factor of ~ 3 with respect to pre-event values. This is consistent with recent MHD simulations (2.5 D).

Electron density profile measurements from hydrogen line intensity ratio method in Versatile Experiment Spherical Torus

2016 ◽  
Vol 87 (11) ◽  
pp. 11E540
Author(s):  
YooSung Kim ◽  
Yue-Jiang Shi ◽  
Jeong-hun Yang ◽  
SeongCheol Kim ◽  
Young-Gi Kim ◽  
...  
Keyword(s):  
Electron Density ◽  
Density Profile ◽  
Line Intensity ◽  
Intensity Ratio ◽  
Electron Density Profile ◽  
Ratio Method ◽  
Spherical Torus ◽  
Hydrogen Line ◽  
Line Intensity Ratio

scholarly journals Plasma Parameters of a Prominence Observed on October 16/17 1999 by SUMER and CDS/SOHO

2001 ◽  
Vol 203 ◽  
pp. 410-412 ◽  
Author(s):  
M. S. Madjarska ◽  
J.-C. Vial ◽  
K. Bocchialini ◽  
V. N. Dermendjiev
Keyword(s):  
Line Intensity ◽  
Intensity Ratio ◽  
Plasma Parameters ◽  
Solar Prominences ◽  
Line Intensity Ratio ◽  
Density Diagnostics

The aim of the present study is to confirm and enrich the results obtained so far on dynamics and diagnostics of solar prominences. A prominence observed on October 16/17, 1999 in the frame of the updated JOP09 was studied. A density diagnostics was made on the basis of the line intensity ratio O IV 1401/1404. The Doppler velocities were derived using SUMER Si IV, O IV and CDS O V 629.73 Å lines.

The relative intensities of nitrogen lines in the semi-coronal regime

1973 ◽  
Vol 9 (1) ◽  
pp. 77-88 ◽  
Author(s):  
W. A. Cilliers ◽  
J. D. Hey ◽  
J. P. S. Rash
Keyword(s):  
Spectral Line ◽  
Electron Temperature ◽  
Electron Density ◽  
Line Intensity ◽  
Intensity Ratio ◽  
Spectral Lines ◽  
Spectral Line Intensity ◽  
Line Intensity Ratio ◽  
Ratio Data ◽  
Intensity Ratios

At plasma densities lower than about 1018 cm-3, strictly speaking, the LTE model cannot be used when the electron temperature is calculated from measured spectral line intensity ratios. In this work a number of nitrogen spectral lines were studied at an electron density of about 1016 cm-3, and the results are discussed with reference to the LTE and semi-coronal models. A method is suggested for analyzing line intensity ratio data from plasmas in the semi-coronal regime.

scholarly journals Density Diagnostics of Solar Emission Lines from the Nitrogen-like Mg VI Ion

1990 ◽  
Vol 142 ◽  
pp. 443-444
Author(s):  
P.K. Raju ◽  
R. Vasundhara
Keyword(s):  
Electron Density ◽  
Line Intensity ◽  
Emission Lines ◽  
Solar Plasma ◽  
Theoretical Line ◽  
Intensity Ratios ◽  
Density Diagnostics

The variation of theoretical line intensity ratios with electron density for Mg VI ion are presented. This study indicates that the line intensity ratios for Mg VI can be used to infer electron density for solar plasma.

On green-to-red line intensity ratio in the solar corona

Solar Physics ◽  
1976 ◽  
Vol 46 (1) ◽  
pp. 183-184 ◽  
Author(s):  
S. Chandra ◽  
U. Narain
Keyword(s):  
Solar Corona ◽  
Line Intensity ◽  
Intensity Ratio ◽  
Line Intensity Ratio ◽  
Red Line
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