Radiation structure of laser-produced plasma at low-Mach number by 2-wavelength Mach-Zehnder interferometer

Author

Shimamura, Kohei ; Ofosu, Joseph A. ; Fukunari, Masafumi ; Komurasaki, Kimiya ; Koizumi, Hirotaka

Author_Institution

Dept. of Adv. Energy, Univ. of Tokyo, Kashiwa, Japan

fYear

2013

fDate

16-21 June 2013

Firstpage

1

Lastpage

5

Abstract

Propagation of a laser detonation wave was studied by two-wavelength Mach-Zehnder interferometry and laser-shadowgraph. To investigate the termination mechanism of the laser detonation wave, this study used a wedge nozzle and made a quasi-one dimensional propagation because the lateral expansion greatly influenced the LSD termination condition. We also investigated the dependency of gaseous form; N₂ and O₂. As a result, the velocity of the detonation front in O₂ was faster than N₂. The peak of the electron density profile in O₂ was higher than that in N₂. Furthermore, this distribution tends to increase when the position gets close to the target wall. This result has never been observed in two-dimensional situation.

Keywords

Mach number; Mach-Zehnder interferometers; detonation waves; electron density; nitrogen; nozzles; oxygen; plasma density; plasma diagnostics; plasma light propagation; plasma production by laser; plasma shock waves; plasma transport processes; LSD termination condition; N₂; O₂; electron density distribution; laser detonation wave front velocity; laser detonation wave propagation; laser shadowgraph; laser-produced plasma; low-Mach number; radiation structure; target wall; two-wavelength Mach-Zehnder interferometer; wedge nozzle; Ionization; Laser beams; Laser theory; Laser transitions; Measurement by laser beam; Plasmas; Propulsion;

fLanguage

English

Publisher

ieee

Conference_Titel

Pulsed Power Conference (PPC), 2013 19th IEEE

Conference_Location

San Francisco, CA

ISSN

2158-4915

Type

conf

DOI

10.1109/PPC.2013.6627537

Filename

6627537