Laser-produced annular plasmas

Veloso F.; Chuaqui, H; Aliaga-Rossel, R; Favre, M.; Mitchell, IH; Wyndham E.

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 ∼103-104 m/s. Electron densities of 1018 cm-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. © 2006 American Institute of Physics.

Más información

Título según WOS: Laser-produced annular plasmas
Título según SCOPUS: Laser-produced annular plasmas
Título de la Revista: REVIEW OF SCIENTIFIC INSTRUMENTS
Volumen: 77
Número: 6
Editorial: AIP Publishing
Fecha de publicación: 2006
Idioma: English
URL: http://scitation.aip.org/content/aip/journal/rsi/77/6/10.1063/1.2206773
DOI:

10.1063/1.2206773

Notas: ISI, SCOPUS