Studies of end loss from a theta pinch using a Twyman--Green interferometer. Scientific report 77-4

Technical Report · Tue Nov 01 00:00:00 EST 1977

DOI:https://doi.org/10.2172/5198923· OSTI ID:5198923

Freeman, R. S.

The transient rate of flow of plasma from the ends of a short, high density, low temperature linear theta pinch was studied experimentally and analytically. Diagnostic devices were used to study the discharge and plasma properties; these included a Rogowski coil, a magnetic field probe and a Twyman-Green double pass interferometer which was illuminated by a 7 mW He--He laser. The interferometer was used to monitor the passage of fringes with respect to time at two radial positions simultaneously by the use of a photodetector consisting of two fast silicon photodiodes with supporting circuitry. One complete fringe represented a change in number density of 2.942 x 10/sup 16/ cm/sup -3/.

• Research Organization: Pennsylvania State Univ., University Park, PA (United States)
• DOE Contract Number: EY-76-S-02-4020
• OSTI ID: 5198923
• Report Number(s): COO-4020-4; TRN: 78-008122
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
INTERFEROMETERS
LINEAR THETA PINCH DEVICES
PLASMA DIAGNOSTICS
END EFFECTS
HELIUM-NEON LASERS
PLASMA DENSITY
THETA PINCH
GAS LASERS
LASERS
LINEAR PINCH DEVICES
MEASURING INSTRUMENTS
OPEN PLASMA DEVICES
PINCH DEVICES
PINCH EFFECT
THERMONUCLEAR DEVICES
700102* - Fusion Energy- Plasma Research- Diagnostics