Measurement of wave-particle interaction and metastable lifetime using laser-induced fluorescence
Abstract
Extensive information, such as ion temperature and wave-particle interactions, can be obtained by the direct measurement of ion distribution functions using laser-induced fluorescence (LIF). This nonintrusive plasma diagnostics provides an important window into the ion motions in phase-space. Previous simulation results suggest that LIF measurements, which are performed on metastable ions produced directly from neutral gas particles and also from ions in other electronic states, place restrictions on the metastable lifetime. In the case where metastable population is produced from direct ionization of neutral atoms, the velocity distribution measured using LIF will only faithfully represent processes which act on the ion dynamics in a time shorter than the metastable lifetime. In this paper, the metastable lifetime effects are explored experimentally for the first time using wave-particle interaction in an Argon multidipole plasma. Here, we demonstrate that this systematic effect can be corrected using the theory addressed in this paper based on the metastable lifetime and relative fraction of metastables produced from pre-existing ions.
- Publication Date:
- Research Org.:
- Univ. of Iowa, Iowa City, IA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1612581
- Alternate Identifier(s):
- OSTI ID: 1506166
- Grant/Contract Number:
- SC0016473
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 26; Journal Issue: 4; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; physics; laser induced fluorescence; plasma waves; plasma diagnostics; collisional excitation; wave particle interactions Absorption spectroscopy
Citation Formats
Chu, F., Hood, R., and Skiff, F. Measurement of wave-particle interaction and metastable lifetime using laser-induced fluorescence. United States: N. p., 2019.
Web. doi:10.1063/1.5089178.
Chu, F., Hood, R., & Skiff, F. Measurement of wave-particle interaction and metastable lifetime using laser-induced fluorescence. United States. https://doi.org/10.1063/1.5089178
Chu, F., Hood, R., and Skiff, F. Wed .
"Measurement of wave-particle interaction and metastable lifetime using laser-induced fluorescence". United States. https://doi.org/10.1063/1.5089178. https://www.osti.gov/servlets/purl/1612581.
@article{osti_1612581,
title = {Measurement of wave-particle interaction and metastable lifetime using laser-induced fluorescence},
author = {Chu, F. and Hood, R. and Skiff, F.},
abstractNote = {Extensive information, such as ion temperature and wave-particle interactions, can be obtained by the direct measurement of ion distribution functions using laser-induced fluorescence (LIF). This nonintrusive plasma diagnostics provides an important window into the ion motions in phase-space. Previous simulation results suggest that LIF measurements, which are performed on metastable ions produced directly from neutral gas particles and also from ions in other electronic states, place restrictions on the metastable lifetime. In the case where metastable population is produced from direct ionization of neutral atoms, the velocity distribution measured using LIF will only faithfully represent processes which act on the ion dynamics in a time shorter than the metastable lifetime. In this paper, the metastable lifetime effects are explored experimentally for the first time using wave-particle interaction in an Argon multidipole plasma. Here, we demonstrate that this systematic effect can be corrected using the theory addressed in this paper based on the metastable lifetime and relative fraction of metastables produced from pre-existing ions.},
doi = {10.1063/1.5089178},
journal = {Physics of Plasmas},
number = 4,
volume = 26,
place = {United States},
year = {Wed Apr 10 00:00:00 EDT 2019},
month = {Wed Apr 10 00:00:00 EDT 2019}
}
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