Asymmetric double Langmuir probe: Small signal application

Journal Article · Tue Dec 01 04:00:00 EST 1987 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1139332· OSTI ID:6058045

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.

• Research Organization: Fusion Energy Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6058045
• Journal Information: Rev. Sci. Instrum.; (United States), Journal Name: Rev. Sci. Instrum.; (United States) Vol. 58:12; ISSN RSINA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
ASYMMETRY
CLOSED PLASMA DEVICES
DESIGN
ELECTRIC PROBES
LANGMUIR PROBE
NATIONAL ORGANIZATIONS
ORNL
PLASMA DENSITY
PLASMA DIAGNOSTICS
PROBES
SIGNALS
TEMPERATURE MEASUREMENT
THERMONUCLEAR DEVICES
THERMONUCLEAR REACTORS
TOKAMAK DEVICES
US AEC
US DOE
US ERDA
US ORGANIZATIONS