Measurements of electron density and temperature in the H-1 heliac plasma by helium line intensity ratios

Journal Article · Thu Mar 15 04:00:00 EDT 2012 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.3692756· OSTI ID:22072253

Shuiliang, Ma; Howard, John; Blackwell, Boyd D; Thapar, Nandika ^[1]

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1. Plasma Research Laboratory, Australian National University, Canberra ACT 0200 (Australia)

Electron density and temperature distributions in the H-1 heliac plasma are measured using the helium line intensity ratio technique based on a collisional-radiative model. An inversion approach with minimum Fisher regularization is developed to reconstruct the ratios of the local emission radiances from detected line-integrated intensities. The electron density and temperature inferred from the He I 667.8/728.1 and He I 728.1/706.5 nm line ratios are in good agreement with those from other diagnostic techniques in the inner region of the plasma. The electron density and temperature values appear to be a little high in the outer region of the plasma. Some possible causes of the discrepancy in the outer region are discussed.

• OSTI ID: 22072253
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 3 Vol. 83; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ELECTRON DENSITY
ELECTRON TEMPERATURE
H-1 HELIAC
HELIUM
PLASMA
PLASMA DIAGNOSTICS
TEMPERATURE DISTRIBUTION