Journal article
Measurement and interpretation of the velocity space correlation of a laboratory plasma fluctuation with laser induced fluorescence
Journal of instrumentation, Vol.8(11), pp.C11015-C11015
11/19/2013
DOI: 10.1088/1748-0221/8/11/C11015
Abstract
A technique for probing velocity space correlations has been developed using laser-induced fluorescence. In this paper, a description of the experimental setup is given, with results to follow in a later publication. The experiment consists of a cylindrical plasma column 3 m long and radius ∼ 0.25 cm, holding singly-charged argon ions (Ar II) with density n ∼ 10 9 cm-3, Ti,|| ∼ .06 eV, and a 1 kG axial magnetic field. Two separate metastable lines are excited by single frequency lasers at 611 nm and 668 nm. These lasers may tune with a precision of .01 pm. The separate lasers are used to measure independent slices of the velocity distribution function. To confirm the velocity distribution and magnetic field, the Doppler-broadened, sigma-polarized Zeeman line for each transition is measured. With this, the absolute parallel component of ion velocity subject to LIF can be determined. The two separate lasers then give us a signal as a function of two separate parallel ion velocities. Two point correlation is used to reduce the noise floor on the plasma fluctuation. This fluctuation is then investigated as a function of the difference in velocity.© 2013 IOP Publishing Ltd and Sissa Medialab srl.
Details
- Title: Subtitle
- Measurement and interpretation of the velocity space correlation of a laboratory plasma fluctuation with laser induced fluorescence
- Creators
- S W MattinglyJ BerumenF ChuR HoodF Skiff
- Resource Type
- Journal article
- Publication Details
- Journal of instrumentation, Vol.8(11), pp.C11015-C11015
- DOI
- 10.1088/1748-0221/8/11/C11015
- ISSN
- 1748-0221
- eISSN
- 1748-0221
- Language
- English
- Date published
- 11/19/2013
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199694302771
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