Comparison of the electron density measurements using Thomson scattering and emission spectroscopy for laser induced breakdown in one atmosphere of helium

Journal Article · Mon Dec 26 00:00:00 EST 2011 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3672817· OSTI ID:22027855

Nedanovska, E; Nersisyan, G; Lewis, C L. S.; Riley, D; Graham, W G ^[1]; Morgan, T J; Huewel, L ^[2]

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1. Department of Physics and Astronomy, Centre for Plasma Physics, Queen's University Belfast, BT71NN (United Kingdom)
2. Department of Physics, Wesleyan University, Middletown, Connecticut 06459 (United States)

Thomson scattering from laser-induced plasma in atmospheric helium was used to obtain temporally and spatially resolved electron temperature and density profiles. Electron density measurements at 5 {mu}s after breakdown are compared with those derived from the separation of the allowed and forbidden components of the 447.1 nm He I line. Plasma is created using 9 ns, 140 mJ pulses from Nd:YAG laser at 1064 nm. Electron densities of {approx}5 x 10{sup 16 }cm{sup -3} are in good agreement with Thomson scattering measurements, benchmarking this emission line as a useful diagnostic for high density plasmas.

• OSTI ID: 22027855
• Journal Information: Applied Physics Letters, Vol. 99, Issue 26; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
74 ATOMIC AND MOLECULAR PHYSICS
BREAKDOWN
COMPARATIVE EVALUATIONS
ELECTRON DENSITY
ELECTRON TEMPERATURE
EMISSION SPECTROSCOPY
HELIUM
ION TEMPERATURE
LASER-PRODUCED PLASMA
LIGHT TRANSMISSION
NEODYMIUM LASERS
PHOTON EMISSION
PLASMA DENSITY
PLASMA DIAGNOSTICS
THOMSON SCATTERING