Asymmetric double Langmuir probe: Small signal application

Technical Report · Sun Nov 01 04:00:00 EST 1987

DOI:https://doi.org/10.2172/5824600· OSTI ID:5824600

Uckan, T.

We discuss the asymmetric double Langmuir probe (ADLP) and demonstrate the possibility of using it to measure plasma temperature T/sub e/ and density n when it is operated in the region of small signal response. The area of one of the ADLP collectors is considerably larger than the other. This probe can be operated at a relatively low applied voltage, eV/sub a/T/sub e/ < 1, and still provides sufficient information to determine the plasma T/sub e/ and n. There is no need for a direct measurement of the ion saturation current, which can be on the order of a few amperes in large fusion devices. This reduces the requirements on the probe power supply. 6 refs., 6 figs.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5824600
• Report Number(s): ORNL/TM-10391; ON: DE88003663
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209* -- Fusion Power Plant Technology-- Component Development &amp; Materials Testing
ASYMMETRY
CARBON
CURRENTS
ELECTRIC CURRENTS
ELECTRIC PROBES
ELECTRON TEMPERATURE
ELEMENTAL MINERALS
ELEMENTS
GRAPHITE
ION TEMPERATURE
LANGMUIR PROBE
MINERALS
NONMETALS
PLASMA DENSITY
PLASMA DIAGNOSTICS
PROBES
TESTING
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS