Plasma production by means of discharge in a spherical cavity
- Russian Academy of Sciences, Institute of Spectroscopy, Troitsk, Moscow reg., 142190 (Russian Federation)
The work is devoted to the study of plasma, appearing as a result of cumulation of shock wave with form close to spherical. The shock wave was obtained by triggering of fast discharge (dI/dt about 10{sup 12} A/s) on inner surface of cavity, made from insulator. Spherical cavity with radius 4.5 mm was filled with Ar at 80 Pa. Inductive storage with semiconductive opening switch was used as a current driver. Spherical plasma with diameter about 1 mm, emitting in vacuum ultraviolet (vuv), was detected by means of pinhole measurements with time gated microchannel plate camera, starting about 50 ns from the beginning of the discharge. vuv spectra have shown the presence spectral lines of ArV-ArVIII ions, which gives the estimation of electron temperature as 30 eV. The plasma ball reveals no instabilities, keeps its characteristics and emits vuv radiation during 300 ns. After 600 ns from the beginning of the discharge plasma emits a flux of electrons with energies about 1 keV with temporal structure about 100 ns.
- OSTI ID:
- 21476237
- Journal Information:
- Journal of Applied Physics, Vol. 107, Issue 10; Other Information: DOI: 10.1063/1.3393769; (c) 2010 American Institute of Physics; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ARGON IONS
ELECTRON TEMPERATURE
ELECTRONS
EV RANGE
FAR ULTRAVIOLET RADIATION
ION TEMPERATURE
KEV RANGE
MICROCHANNEL ELECTRON MULTIPLIERS
MULTICHARGED IONS
PLASMA
PLASMA PRODUCTION
SHOCK WAVES
SPHERICAL CONFIGURATION
ULTRAVIOLET SPECTRA
CHARGED PARTICLES
CONFIGURATION
ELECTROMAGNETIC RADIATION
ELECTRON MULTIPLIERS
ELECTRON TUBES
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
IONS
LEPTONS
RADIATIONS
SPECTRA
ULTRAVIOLET RADIATION