Measurement of Electron Density Evolution by the Optical Fiber Interferometer on Theta Pinch Plasmas*

2021 ◽  
Author(s):  
Tao Lan ◽  
Sen Zhang ◽  
Weixing Ding ◽  
Ge Zhuang ◽  
Zhengwei Wu ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Electron Density ◽  
Density Evolution ◽  
Theta Pinch

scholarly journals Die zeitliche Änderung der radialen Elektronendichteverteilung beim Theta-Pinch

1963 ◽  
Vol 18 (8-9) ◽  
pp. 895-900
Author(s):  
Franz Peter Küpper
Keyword(s):  
Density Distribution ◽  
Electron Density ◽  
Electron Density Distribution ◽  
Electron Distribution ◽  
Radial Symmetry ◽  
Zero Order ◽  
Time Interval ◽  
Interferometric Method ◽  
Density Distributions ◽  
Theta Pinch

In a θ-pinch the radial symmetry of the electron density distribution as a function of time has been measured by a MACH—ZEHNDER interferometer. In a time interval of 400 nsec during a discharge an image converter made three pictures (exposure times of 10 nsec each) . Up to 100 nsec after the first compression, the experimental results show different density distributions for the cases of trapped parallel and antiparallel magnetic fields. Complete radial symmetry of the electron density distribution was not found.Another interferometric method for measuring the radial symmetry of the electron distribution by observing “zero order” fringes is described.

Electron density evolution after L–H transitions and the L–H/H–L cycle in ASDEX Upgrade

2012 ◽  
Vol 52 (11) ◽  
pp. 114026 ◽  
Author(s):  
M. Willensdorfer ◽  
E. Wolfrum ◽  
A. Scarabosio ◽  
F. Aumayr ◽  
R. Fischer ◽  
...  
Keyword(s):  
Electron Density ◽  
Density Evolution

Electron density and plasma dynamics of a spherical theta pinch

2012 ◽  
Vol 19 (3) ◽  
pp. 033505 ◽  
Author(s):  
C. Teske ◽  
Y. Liu ◽  
S. Blaes ◽  
J. Jacoby
Keyword(s):  
Electron Density ◽  
Plasma Dynamics ◽  
Theta Pinch

Long-time measurements of line-integrated plasma electron density using a two-color homodyne optical fiber interferometer

2021 ◽  
Vol 92 (9) ◽  
pp. 093506
Author(s):  
Tao Lan ◽  
Sen Zhang ◽  
Weixing Ding ◽  
Ge Zhuang ◽  
Zhengwei Wu ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Electron Density ◽  
Plasma Electron ◽  
Long Time ◽  
Plasma Electron Density

GAS LASER MEASUREMENTS OF THE ELECTRON DENSITY OF A PLASMA PRODUCED BY A VERY FAST THETA‐PINCH PREHEATER

1965 ◽  
Vol 7 (2) ◽  
pp. 29-30 ◽  
Author(s):  
A. C. C. Warnock ◽  
W. M. Deuchars ◽  
J. Irving ◽  
D. E. Kidd
Keyword(s):  
Electron Density ◽  
Gas Laser ◽  
Laser Measurements ◽  
Theta Pinch

Laser Induced Tunnel Ionization and Electron Density Evolution in Air

2005 ◽  
Vol 74 (8) ◽  
pp. 2255-2259
Author(s):  
Pawan K. Tiwari ◽  
G. J. H. Brussaard ◽  
M. J. v. d. Wiel ◽  
V. K. Tripathi
Keyword(s):  
Electron Density ◽  
Density Evolution ◽  
Tunnel Ionization

Déplacements des raies d'émission de l'ion ArII dans un plasma dense

1982 ◽  
Vol 60 (6) ◽  
pp. 820-824 ◽  
Author(s):  
P. A. Simard
Keyword(s):  
Qualitative Analysis ◽  
Spectroscopic Study ◽  
Electron Density ◽  
Argon Plasma ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Theta Pinch ◽  
First Time ◽  
Very High ◽  
Plasma Effect

A spectroscopic study of the emission from an argon plasma produced by a small theta-pinch is described. The electron density in the plasma is very high and the temperature relatively cool. Values obtained for these quantities are [Formula: see text] and [Formula: see text]. Wavelengths of many ArII lines have been measured between 2700 and 5000 Å. Many of these lines exhibit small shifts to the blue or to the red but others show large red shifts. Particularly significant are the multiplets 4p4P−4d4P, 4p4P−5s4P and 4p4S−4d4P where the measured shifts are about 6.0 ± 0.8 cm−1. These shifts have been interpreted as plasma polarization shifts. A plasma effect on the spin–orbit coupling in ArII has also been observed for the first time. A qualitative analysis of these phenomena is given.

scholarly journals Exploring the temporally resolved electron density evolution in extreme ultra-violet induced plasmas

2014 ◽  
Vol 47 (30) ◽  
pp. 302001 ◽  
Author(s):  
R M van der Horst ◽  
J Beckers ◽  
S Nijdam ◽  
G M W Kroesen
Keyword(s):  
Electron Density ◽  
Ultra Violet ◽  
Density Evolution
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