Abstract

Four parameters of the He(I) 447.1-nm line with a forbidden component were measured. A pulsed arc was used as a plasma source. Electron density in the range (1.9-5.9) 10²¹ m^-3 was measured with a CO₂ laser interferometer. On the basis of the comparisons of the obtained results with several theories and empirical formulae for plasma density determination, it is shown that this line could be used for simple but precise electron density measurement, with an error less than <10% .

Simultaneous electron density and ion temperature measurements of a moderately dense plasma using Doppler and Stark broadened He ii lines

Joseph Davidson, Daniel R. Wells, Laxman G. Phadke, Joseph G. Hirschberg, Jack Tunstall, and Paul E. Ziajka
Appl. Opt. 17(10) 1481-1482 (1978)

Measurement of electron density and temperature from laser-induced nitrogen plasma at elevated pressure (1–6 bar)

Ashwin P. Rao, Mark Gragston, Anil K. Patnaik, Paul S. Hsu, and Michael B. Shattan
Opt. Express 27(23) 33779-33788 (2019)

VUV radiometry below 100 nm: the high-power hydrogen arc as a standard source of continuum radiation between 53 nm and 92 nm

K. Behringer and P. Thoma
Appl. Opt. 18(15) 2586-2594 (1979)

Spatially resolved determination of atomic particle densities and line shapes within an arc plasma by tomographic resonance interferometry

Georg Pretzler, Christian Haas, Theo Neger, and Helmut Jäger
Appl. Opt. 36(33) 8806-8814 (1997)

Continuous calibration of a vacuum ultraviolet system from 65 to 125 nm by a cascade arc and comparison with the calibrated line radiation of a hollow cathode

Robert Martin Frost and Peter Awakowicz
Appl. Opt. 36(9) 1994-2000 (1997)