mechanism of this power convertor operation is connected with charge separation
by gas flow and may be close to the action of the well-known Van de Graaf
The physical properties just listed were revealed and studied in the vortex
plasmoid created by capacity-coupled high-frequency (HF) discharge. Some of the
important experimental results of vortex plasmoid physics are considered in this
The main goal of this chapter is to describe studies of longitudinal plasmoids
created by capacity-coupled high-frequency discharge in swirl flow . A longitudinal
plasmoid was created by high-frequency discharge in swirl flow at normal atmo-
The following tasks and problems were studied in this work:
Stable vortex plasmoid creation by a capacity-coupled high-frequency discharge
in swirl airflow. Study of the longitudinal plasmoid evolution and its structure at
a pulse repetitive regime of external high-frequency power pumping.
Physical properties of this plasmoid in swirl flow at a pulse repetitive regime of
external high-frequency power pumping.
Energy distribution inside the longitudinal vortex plasmoid created by the
capacity-coupled high-frequency discharge.
Generally speaking, this work is the continuation of Kapitsa's work. Note that the
listed tasks could be studied only with application of modern diagnostic instrumen-
tation (such as high-speed CCD camera, optical spectrometer with high resolution,
and electronic acquisition of measured data). This diagnostic instrumentation was
not available during Kapitsa's experiments. Thus, the experimental results obtained
in this work are actual and very important for the future development of plasmoids
and BL physics.
Capacity-Coupled High-Frequency Discharge
Parameters in High-Speed Gas Flow
It is shown that plasma formation created by capacity-coupled high-frequency
discharge (CHFD) in high-speed gas flow has a number of unusual properties
(Klimov 2004 , 2009 ; Klimov et al. 2009a , 2011 ):
A non-Maxwellian electron distribution function over energy. There is a group
(or groups) of fast electrons (an electron beam with the energy of about
10-1,000 eV). Thus, it is possible to produce radicals and excited molecules by
these fast electrons.
The plasmoid can be created in the airflow by a capacity-coupled high-frequency
discharge with a single internal electrode (one-electrode regime; the grounded
electrode is connected with the high-frequency generator by a space capacity)
or using two external electrodes, covered by a dielectric film (dielectric barrier