High-accuracy time- and space-resolved Stark shift measurements (invited)

Journal Article · Wed Jan 01 00:00:00 EST 1997 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1147826· OSTI ID:451939

Bailey, J E; Adams, R; Carlson, A L; Ching, C H; Filuk, A B; Lake, P ^[1]

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1. Sandia National Laboratories, Albuquerque, New Mexico 87175-1196 (United States)

Stark-shift measurements using emission spectroscopy are a powerful tool for advancing understanding in many plasma physics experiments. We use simultaneous two-dimensional space- and time-resolved spectra to study the electric field evolution in the 20 TW Particle Beam Fusion Accelerator II ion diode acceleration gap. Fiber optic arrays transport light from the gap to remote streaked spectrographs operated in a multiplexed mode that enables recording time-resolved spectra from eight spatial locations on a single instrument. Design optimization and characterization measurements of the multiplexed spectrograph properties include the astigmatism, resolution, dispersion, and sensitivity. A semiautomated line-fitting procedure determines the Stark shift and the related uncertainties. Fields up to 10 MV/cm are measured with an accuracy {plus_minus}2{percent}{endash}4{percent}. Detailed tests of the procedure confirm that the uncertainty in the wavelength-shift error bars is less than {plus_minus}20{percent}. Development of an active spectroscopy probe technique that uses laser-induced fluorescence from an injected atomic beam to obtain three-dimensional space- and time-resolved measurements of the electric and magnetic fields is in progress. {copyright} {ital 1997 American Institute of Physics.}

• Research Organization: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 451939
• Report Number(s): CONF-960543-; ISSN 0034-6748; TRN: 97:006296
• Journal Information: Review of Scientific Instruments, Vol. 68, Issue 1; Conference: 11. annual high-temperature plasma diagnostics conference, Monterey, CA (United States), 12-16 May 1996; Other Information: PBD: Jan 1997
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION
PARTICLE BEAM FUSION ACCELERATOR
PLASMA DIAGNOSTICS
STARK EFFECT
EMISSION SPECTROSCOPY
STREAK PHOTOGRAPHY
ELECTRIC FIELDS
SPATIAL RESOLUTION
TIME RESOLUTION
VISIBLE RADIATION
LITHIUM
DATA ACQUISITION
DATA PROCESSING
particle beam fusion accelerators
time resolved spectroscopy
two-dimensional spectroscopy
visible spectroscopy
curve fitting
plasma transport processes
high-speed optical techniques