TEMPERATURE EFFECT ON LANGMUIR PROBE MEASUREMENT

Journal Article · Wed Apr 01 04:00:00 EST 1964 · Journal of Applied Physics (U.S.)

DOI:https://doi.org/10.1063/1.1713579· OSTI ID:4073163

Chen, C J

A substantial lowering of the work function of a tungsten Langmuir probe immersed in an argon plasma in a discharge tube is observed. The mechanism is thought to be similar to the Schottky effect. The electron temperature measurement is lowered about 30%, in a particular discharge condition, as the probe goes from room temperature to 2000 deg C. The charge number density measurement by saturation electron current appears to be higher by 15%, and that by ion saturation current appears to be higher by almost one order of magnitude. This phenomenon can also account for the discrepancy of the ratio of ion and electron saturation current. (auth)

• Research Organization: California Inst. of Tech., Pasadena
• Sponsoring Organization: USDOE
• NSA Number: NSA-18-015365
• OSTI ID: 4073163
• Journal Information: Journal of Applied Physics (U.S.), Journal Name: Journal of Applied Physics (U.S.) Vol. Vol: 35; ISSN JAPIA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

DENSITY
ELECTRIC DISCHARGES
ELECTRONS
LANGMUIR PROBE
MEASURED VALUES
PHYSICS
PLASMA
SAMPLING
TEMPERATURE
TUNGSTEN