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

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; N
₂
and O
₂
. As a result, the velocity of the detonation front in O
₂
was faster than N
₂
. The peak of the electron density profile in O
₂
was higher than that in N
₂
. 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.