Current sheath behavior and its velocity enhancement in a low energy Mather-type plasma focus device
- Department of Physics, University of Tehran, N. Kargar Ave, Tehran 14399 (Iran, Islamic Republic of)
The dynamics of the plasma sheath layer and its velocity enhancement have been studied in a low energy (4.9 kJ) Mather-type plasma focus device. Experiments were performed to study the effect of the Lorentz force variation on the current sheath expansion and movement, as well as the existence of traction between all parts of the sheath layer. Two different shape of anodes (cylindrical and step) along with an axial magnetic probe were used to investigate the effects of various experimental conditions, namely different charging voltages and gas pressures. In order to explore the upper limit of the current sheath velocity, a comparison has been made between the experimental data gathered by the probe and the Lee's computational model. The limitations governing the enhancement of the current sheath velocity that can lead to the deterioration of a good focusing phenomenon were also investigated. The increase of the current sheath velocity due to the usage of the step anode on ion generation and hard x-ray emissions have been demonstrated by means of an ion collector and a hard x-ray detector.
- OSTI ID:
- 21538095
- Journal Information:
- Journal of Applied Physics, Vol. 109, Issue 4; Other Information: DOI: 10.1063/1.3549017; (c) 2011 American Institute of Physics; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BALANCES
BENCHMARKS
CAPACITANCE
COMPARATIVE EVALUATIONS
COMPUTERIZED SIMULATION
EMISSION
EXPANSION
HARD X RADIATION
IONS
LAYERS
LORENTZ FORCE
MAGNETIC PROBES
PLASMA
PLASMA FOCUS
PLASMA FOCUS DEVICES
PLASMA PRESSURE
PLASMA SHEATH
REDUCTION
VELOCITY
X-RAY SOURCES
CHARGED PARTICLES
CHEMICAL REACTIONS
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
EVALUATION
IONIZING RADIATIONS
MEASURING INSTRUMENTS
OPEN PLASMA DEVICES
PHYSICAL PROPERTIES
PROBES
RADIATION SOURCES
RADIATIONS
SIMULATION
THERMONUCLEAR DEVICES
WEIGHT INDICATORS
X RADIATION