[Ion temperature gradient instability and transport: Progress report]

Technical Report · Mon Jun 01 04:00:00 EDT 1992

DOI:https://doi.org/10.2172/10144174· OSTI ID:10144174

Anomalous ion thermal conductivity remains in open physics issue for the present generation of high temperature Tokamaks. It is now believed to be due to the Ion Temperature Gradient (ITG or n{sub i}) instability. The production and identification of this instability is being studied in the simpler and experimentally convenient configuration of the steady state Columbia Linear Machine (CLM). The slab branch of this instability has been produced (by two different heating methods), identified and reported for the first time. The transition of the slab branch to the toroidal branch (more relevant for Tokamaks) has now been studied by turning on the mirror current and gradually increasingly it in CLM. This has enabled us to identify the toroidal/trapped ion branch of the ITG mode for the first time. A preliminary measurement of the ion thermal conductivity due to the mode indicates a highly anomalous value.

• Research Organization: Columbia Univ., New York, NY (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FG02-87ER53257
• OSTI ID: 10144174
• Report Number(s): DOE/ER/53257--5; ON: DE92013590
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700330
700340
HEAT TRANSFER
ION TEMPERATURE
PLASMA INSTABILITY
PLASMA KINETICS, TRANSPORT, AND IMPURITIES
PLASMA WAVES, OSCILLATIONS, AND INSTABILITIES
PROGRESS REPORT
TEMPERATURE GRADIENTS
TOKAMAK DEVICES