Characterization of the TFTR plasma edge by Langmuir-calorimeter probes

Technical Report · Sat Mar 01 00:00:00 EST 1986

DOI:https://doi.org/10.2172/5792169· OSTI ID:5792169

Kilpatrick, S J; Manos, D M; Budny, R V; Stangeby, P C; Ritter, R S; Young, K M

Two combination Langmuir-calorimeter probes were operated on the TFTR midplane to measure plasma properties of the scrape-off layer. Two different caloriemter elements were used: 0.5 x 3 x 8 mm Ta plates or 6.4 mm diameter graphite rods fitted with thermocouples. Separate graphite rods served as Langmuir elements. This paper presents Langmuir probe measurements of the radial profiles of edge density and electron temperature, and calorimeter measurements of heat flux. The variation of these quantities in certain operational regimes are presented, including dependence on ohmic and neutral beam heating, compression and free expansion, plasma major and minor radii, plasma current, and line integral density with and without Cr gettering.

• Research Organization: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 5792169
• Report Number(s): PPPL-2284; ON: DE86009758
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
PLASMA DIAGNOSTICS
CALORIMETERS
LANGMUIR PROBE
TFTR TOKAMAK
PLASMA SCRAPE-OFF LAYER
ELECTRON TEMPERATURE
HEAT FLUX
PLASMA DENSITY
THERMOCOUPLES
BOUNDARY LAYERS
ELECTRIC PROBES
LAYERS
MEASURING INSTRUMENTS
PROBES
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS
700102* - Fusion Energy- Plasma Research- Diagnostics