Effect of plasma sheath structure in plasma focus

Journal Article · Mon Feb 01 04:00:00 EST 1993 · IEEE Transactions on Plasma Science (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/27.221118· OSTI ID:6232155

Wang, Xin Xin; Tsin, Tsin Chi ^[1]

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1. Tsinghua Univ., Beijing (China)

The development of plasma sheath in the run-down phase and pinch phase in a plasma focus is studied with laser interferometry. The time-resolved interferograms show that the structures of plasma sheaths in the run-down phase are different at low and high pressures of filling gas. This leads to a distinct plasma pattern above the anode. At low pressure the plasma sheath in the run-down phase has clear boundaries, resulting in better compression in the pinch phase and a higher X-ray yield. At high pressure the plasma sheath is turbulent at the back side and becomes disordered in the pinch phase, giving little or no X-ray emission. The effect of a ceiling', i.e., a metal plate placed above the anode, is investigated. With the ceiling' the reproducibility of X-ray emission is much improved.

• OSTI ID: 6232155
• Journal Information: IEEE Transactions on Plasma Science (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Transactions on Plasma Science (Institute of Electrical and Electronics Engineers); (United States) Vol. 21:1; ISSN ITPSBD; ISSN 0093-3813
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700410* -- Specific Fusion Devices & Experiments-- (1992-)
BEAMS
DATA
ELECTROMAGNETIC RADIATION
EQUIPMENT
EXPERIMENTAL DATA
INFORMATION
INTERFEROMETRY
ION BEAMS
IONIZING RADIATIONS
MORPHOLOGY
NUMERICAL DATA
OPEN PLASMA DEVICES
PINCH EFFECT
PLASMA FOCUS
PLASMA FOCUS DEVICES
PLASMA SHEATH
RADIATION SOURCES
RADIATIONS
THERMONUCLEAR DEVICES
USES
X RADIATION
X-RAY EQUIPMENT
X-RAY SOURCES