Spectroscopy of atomic hydrogen in dense plasmas in the presence of dynamic fields: Intra-Stark spectroscopy
Journal Article
·
· Physical Review A. General Physics; (United States)
- Institut fuer Experimentalphysik V, Ruhr-Universitaet, 4630 Bochum (Germany)
The Lyman-{alpha} profile of hydrogen was studied in a gas-linear pinch, the plasma parameters of which were determined by Thomson scattering. The profiles displayed pronounced first- and second-order dips. The theory of dips in profiles of hydrogenlike spectral lines in plasmas containing quasimonochromatic electric fields, e.g., plasma waves or microwaves, is therefore further developed for high-density plasmas. The central point is the allowance of a spatial nonuniformity of the ion microfield that becomes more important with increasing density. Three qualitatively new features of the dip'' effect arise: (1) a significant shift of the dip positions (mostly to the blue side), (2) an appearance of dips in profiles of the central Stark components, and (3) an appearance of higher-order dips due to multiquantum resonances (between plasma waves and quasistatic Stark splitting). The measured blueshifts of the first- and the second-order dips are in fairly good agreement with the predictions of the present theory. This shift is much larger than the shift of the spectral line as a whole. The amplitude of the plasma waves as estimated from the measured half-widths of the dips was of the order of 2 MV/cm.
- OSTI ID:
- 5078250
- Journal Information:
- Physical Review A. General Physics; (United States), Journal Name: Physical Review A. General Physics; (United States) Vol. 44:12; ISSN 1050-2947; ISSN PLRAA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
664100* -- Theory of Electronic Structure of Atoms & Molecules-- (1992-)
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700320 -- Plasma Diagnostic Techniques & Instrumentation-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ELEMENTS
EMISSION SPECTRA
EMISSION SPECTROSCOPY
HYDROGEN
INELASTIC SCATTERING
LINEAR PINCH DEVICES
LYMAN LINES
NONMETALS
OPEN PLASMA DEVICES
PINCH DEVICES
PLASMA DIAGNOSTICS
PLASMA WAVES
SCATTERING
SPECTRA
SPECTRAL SHIFT
SPECTROSCOPY
STARK EFFECT
THERMONUCLEAR DEVICES
THOMSON SCATTERING
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700320 -- Plasma Diagnostic Techniques & Instrumentation-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ELEMENTS
EMISSION SPECTRA
EMISSION SPECTROSCOPY
HYDROGEN
INELASTIC SCATTERING
LINEAR PINCH DEVICES
LYMAN LINES
NONMETALS
OPEN PLASMA DEVICES
PINCH DEVICES
PLASMA DIAGNOSTICS
PLASMA WAVES
SCATTERING
SPECTRA
SPECTRAL SHIFT
SPECTROSCOPY
STARK EFFECT
THERMONUCLEAR DEVICES
THOMSON SCATTERING