Ultrafast laser-collision-induced fluorescence in atmospheric pressure plasma
The implementation and demonstration of laser-collision-induced fluorescence (LCIF) generated in atmospheric pressure helium environments is presented in this communication. As collision times are observed to be fast (~10 ns), ultrashort pulse laser excitation (<100 fs) of the 2 3S to 3 3P (388.9 nm) is utilized to initiate the LCIF process. Both neutral-induced and electron-induced components of the LCIF are observed in the helium afterglow plasma as the reduced electric field (E/N) is tuned from <0.1 Td to over 5 Td. Under the discharge conditions presented in this study (640 Torr He), the lower limit of electron density detection is ~10 12 e cm -3. Lastly, the spatial profiles of the 2 3S helium metastable and electrons are presented as functions of E/N to demonstrate the spatial resolving capabilities of the LCIF method.
- Publication Date:
- Report Number(s):
- SAND-2017-0510J
Journal ID: ISSN 0022-3727; 650506
- Grant/Contract Number:
- AC04-94AL85000; SC0001939; AC04-94SL85000
- Type:
- Published Article
- Journal Name:
- Journal of Physics. D, Applied Physics
- Additional Journal Information:
- Journal Volume: 50; Journal Issue: 14; Journal ID: ISSN 0022-3727
- Publisher:
- IOP Publishing
- Research Org:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; atmospheric pressure plasma; diagnostics; laser-collision-induced fluorescence; ultrafast laser; laser-induced fluorescence; helium
- OSTI Identifier:
- 1345846
- Alternate Identifier(s):
- OSTI ID: 1361648
Barnat, E. V., and Fierro, A.. Ultrafast laser-collision-induced fluorescence in atmospheric pressure plasma. United States: N. p.,
Web. doi:10.1088/1361-6463/aa5f1e.
Barnat, E. V., & Fierro, A.. Ultrafast laser-collision-induced fluorescence in atmospheric pressure plasma. United States. doi:10.1088/1361-6463/aa5f1e.
Barnat, E. V., and Fierro, A.. 2017.
"Ultrafast laser-collision-induced fluorescence in atmospheric pressure plasma". United States.
doi:10.1088/1361-6463/aa5f1e.
@article{osti_1345846,
title = {Ultrafast laser-collision-induced fluorescence in atmospheric pressure plasma},
author = {Barnat, E. V. and Fierro, A.},
abstractNote = {The implementation and demonstration of laser-collision-induced fluorescence (LCIF) generated in atmospheric pressure helium environments is presented in this communication. As collision times are observed to be fast (~10 ns), ultrashort pulse laser excitation (<100 fs) of the 23S to 33P (388.9 nm) is utilized to initiate the LCIF process. Both neutral-induced and electron-induced components of the LCIF are observed in the helium afterglow plasma as the reduced electric field (E/N) is tuned from <0.1 Td to over 5 Td. Under the discharge conditions presented in this study (640 Torr He), the lower limit of electron density detection is ~1012 e cm-3. Lastly, the spatial profiles of the 23S helium metastable and electrons are presented as functions of E/N to demonstrate the spatial resolving capabilities of the LCIF method.},
doi = {10.1088/1361-6463/aa5f1e},
journal = {Journal of Physics. D, Applied Physics},
number = 14,
volume = 50,
place = {United States},
year = {2017},
month = {3}
}