PRIKLADNAYA FIZIKA
(Applied Physics)
The Scientific and Technical Journal
| 2016, No. 2 | Founded in 1994. | Moscow |
Features of a radial distribution of plasma parameters at the initial section
of a supersonic jet created by the pulsed discharge in a capillary
A. S. Pashchina, A. V. Efimov, V. F. Chinnov, and A. G. Ageev
Joint Institute for High Temperatures of the Russian Academy of Sciences
Bld. 2, 13 Izhorskaya str., Moscow, 125412, Russia
E-mail: fgrach@mail.ru
Received March 14, 2016
The results of spectroscopic studies of the initial section of the supersonic plasma jet created by a pulsed discharge
in the capillary with the ablative wall are presented. Features of the spatial distribution of the electron density and the intensity of the
spectral components, which, in particular, caused by the high electron temperature in the hot central zone, exceeding the "normal" temperature,
as well as significant non-isobaricity at the initial section of supersonic jet are revealed. The radiative properties of high-temperature jet
core (intensity and profile of the Balmer lines Hα and Hβ, relative intensities of C II lines) registered with
high temporal (1—50 μs) and spatial
(30—50 micron) resolution allowed to establish basic patterns of pressure and temperature distributions in the vicinity of the central shock.
The presence of the molecular components exhibiting their emission properties at the plasma jet periphery permit us to estimate the parameters
of the plasma in the spatial domain, where “detached” shock waves of the supersonic jet are created.
PACS: 52.70.Kz; 52.75.Hn; 52.35.Tc
Keywords: pulse discharge, capillary, ablation, spectroscopy, supersonic jet, pressure profile, electron density, temperature.
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