scholarly journals Measurement of Electron Density and Temperature of Laser-Induced Copper Plasma

2013 ◽  
Vol 25 (4) ◽  
pp. 2192-2198 ◽  
Author(s):  
M.A. Naeem ◽  
M. Iqbal ◽  
N. Amin ◽  
M. Musadiq ◽  
Y. Jamil ◽  
...  
Keyword(s):  
Electron Density ◽  
Electron Density And Temperature ◽  
Copper Plasma

THEORETICAL ELECTRON DENSITY AND TEMPERATURE SENSITIVE EMISSION LINE RATIOS FOR HELIUM-LIKE Si XIII COMPARED TO DITE TOKAMAK OBSERVATIONS

1989 ◽  
Vol 50 (C1) ◽  
pp. C1-559-C1-564
Author(s):  
F. P. KEENAN ◽  
R. BARNSLEY ◽  
J. DUNN ◽  
K. D. EVANS ◽  
S. M. McCANN ◽  
...  
Keyword(s):  
Emission Line ◽  
Electron Density ◽  
Temperature Sensitive ◽  
Electron Density And Temperature

Anomalous features of the electron density in the topside ionosphere

1969 ◽  
Vol 311 (1507) ◽  
pp. 501-516 ◽  
Keyword(s):  
Electron Density ◽  
Power Supply ◽  
Data Rate ◽  
Power Lines ◽  
Topside Ionosphere ◽  
Telemetry Data ◽  
Electron Density And Temperature

The instruments which measure electron density and temperature are quite separate and independent in operation, but on account of the limitations in power supply and telemetry data rate the two experiments share the same power lines and some data channels.

scholarly journals Experimental stark widths and shifts of V II spectral lines

2020 ◽  
Vol 498 (2) ◽  
pp. 2068-2074 ◽  
Author(s):  
J Manrique ◽  
D M Díaz Pace ◽  
C Aragón ◽  
J A Aguilera
Keyword(s):  
Electron Density ◽  
Wavelength Range ◽  
Spectral Lines ◽  
Electron Density And Temperature ◽  
And Shifts

ABSTRACT We have measured the Stark widths and shifts of V II spectral lines in the wavelength range 2000–4200 Å belonging to 75 multiplets. The spectra are emitted by laser-induced plasmas generated from fused glass discs prepared by borate fusion. The electron density and temperature are in the ranges (0.72–6.5) × 1017 cm−3 and (11 000–14 900) K, respectively. To avoid self-absorption, we have used seven samples with vanadium concentrations selected by the CSigma graph methodology. This has allowed to include strong and weak lines in the study, including resonance and forbidden lines. The experimental widths and shifts are compared with theoretical values available in the literature.

Electron density and temperature measurements in the lower ionosphere as deduced from the warm plasma theory of the h.f. quadrupole probe

1972 ◽  
Vol 8 (2) ◽  
pp. 231-253 ◽  
Author(s):  
J. M. Chasseriaux ◽  
R. Debrie ◽  
C. Renard
Keyword(s):  
Magnetic Field ◽  
Numerical Integration ◽  
Electron Density ◽  
Lower Ionosphere ◽  
Great Difficulty ◽  
Maxwellian Plasma ◽  
Warm Plasma ◽  
Plasma Theory ◽  
Electron Density And Temperature ◽  
The Magnetic Field

The frequency response of the h.f. quadrupole probe is calculated to be used as a diagnostic tool for measurements of electron density and temperature. In §2 the magnetic field is assumed to be zero, and ion motions are neglected. For a Maxwellian plasma, the so-called ‘Landau wave approximation’ is compared with various more sophisticated treatments, such as numerical integration or super-Cauchy and multiple water-bag models. The range of validity of this approximation is shown to be large, and the results can be applied to the most interesting parts of the experimental observations. All results previously established are recovered with greater speed. Having studied various disturbances (collisions, inhomogeneity and relative motion of the probe with respect to the plasma), it is deduced that the best way to determine the electron temperature is to use the anti-resonances due to beating between the Landau wave and the cold plasma field. In § 3 we describe the quadrupole probe, launched in December 1971 as part of the CISASPE rocket experiment. To deduce the electron density and temperature from these measurements, it is necessary to consider the influence of a static magnetic field, such as the earth's magnetic field. The general case could be treated by numerical integration, though with great difficulty, but it is shown that in most ionospheric conditions, in the vicinity of the upper hybrid frequency ωT the above treatment is again possible, the plasma frequency simply being replaced by ωT, and the thermal velocity slightly modified. These assumptions are used to deduce the electron density and temperature profiles.

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