Laser-produced annular plasmas
Abstract
A new technique is presented for the formation of annular plasmas on a metal surface with a high-power laser using a combination of axicon and converging lenses. The annular plasma formed on a titanium target in a chamber of hydrogen gas was investigated using schlieren imaging and Mach Zehnder interferometry. Expansion of the plasma was shown to be anisotropic with velocities of {approx}10{sup 3}-10{sup 4} m/s. Electron densities of 10{sup 18} cm{sup -3} were measured with radial profiles that confirm the presence of a hollow structure. The interferometric observations also show the presence of an inward shock wave traveling to the center of the annular plasma, which compresses the background neutrals, reaching a density around 18 times initial gas density, at 95 ns after the initial annular plasma is produced.
- Authors:
-
- Departamento de Fisica, Pontificia Universidad Catolica de Chile, Vicuna Mackenna 4860 Macul, Santiago 782-0436 (Chile)
- Publication Date:
- OSTI Identifier:
- 20853290
- Resource Type:
- Journal Article
- Journal Name:
- Review of Scientific Instruments
- Additional Journal Information:
- Journal Volume: 77; Journal Issue: 6; Other Information: DOI: 10.1063/1.2206773; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ANISOTROPY; ELECTRON DENSITY; HYDROGEN; INTERFEROMETRY; LASERS; PLASMA; PLASMA DENSITY; PLASMA DIAGNOSTICS; PLASMA HEATING; PLASMA PRODUCTION; SHOCK WAVES; SURFACES; TITANIUM
Citation Formats
Veloso, F, Chuaqui, H, Aliaga-Rossel, R, Favre, M, Mitchell, I H, and Wyndham, E. Laser-produced annular plasmas. United States: N. p., 2006.
Web. doi:10.1063/1.2206773.
Veloso, F, Chuaqui, H, Aliaga-Rossel, R, Favre, M, Mitchell, I H, & Wyndham, E. Laser-produced annular plasmas. United States. https://doi.org/10.1063/1.2206773
Veloso, F, Chuaqui, H, Aliaga-Rossel, R, Favre, M, Mitchell, I H, and Wyndham, E. 2006.
"Laser-produced annular plasmas". United States. https://doi.org/10.1063/1.2206773.
@article{osti_20853290,
title = {Laser-produced annular plasmas},
author = {Veloso, F and Chuaqui, H and Aliaga-Rossel, R and Favre, M and Mitchell, I H and Wyndham, E},
abstractNote = {A new technique is presented for the formation of annular plasmas on a metal surface with a high-power laser using a combination of axicon and converging lenses. The annular plasma formed on a titanium target in a chamber of hydrogen gas was investigated using schlieren imaging and Mach Zehnder interferometry. Expansion of the plasma was shown to be anisotropic with velocities of {approx}10{sup 3}-10{sup 4} m/s. Electron densities of 10{sup 18} cm{sup -3} were measured with radial profiles that confirm the presence of a hollow structure. The interferometric observations also show the presence of an inward shock wave traveling to the center of the annular plasma, which compresses the background neutrals, reaching a density around 18 times initial gas density, at 95 ns after the initial annular plasma is produced.},
doi = {10.1063/1.2206773},
url = {https://www.osti.gov/biblio/20853290},
journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 6,
volume = 77,
place = {United States},
year = {Thu Jun 15 00:00:00 EDT 2006},
month = {Thu Jun 15 00:00:00 EDT 2006}
}