Ion temperature gradient instability: Progress report

Technical Report · Sun Jan 01 04:00:00 EST 1989

OSTI ID:5723464

Anomalous ion thermal conductivity remains an open physics issue for the present generation of high temperature Tokamaks. It is generally believed to be due to Ion Temperature Gradient Instability (/eta//sub i/ mode). However, it has been difficult, if not impossible to identify this instability and study the anomalous transport due to it, directly. Therefore the production and identification of the mode is pursued in the simpler and experimentally convenient configuration of the Columbia Linear Machine (CLM). CLM is a steady state machine which already has all the appropriate parameters, except /eta//sub i/. This parameter is being increased to the appropriate value of the order of 1 by 'feathering' a tungsten screen located between the plasma source and the experimental cell to flatten the density profile and appropriate redesign of heating antennas to steepen the ion temperature profile. Once the instability is produced and identified, a thorough study of the characteristics of the mode can be done via a wide range of variation of all the critical parameters: /eta//sub i/, parallel wavelength, etc.

• Research Organization: Columbia Univ., New York, NY (USA)
• DOE Contract Number: FG02-87ER53257
• OSTI ID: 5723464
• Report Number(s): DOE/ER/53257-2; ON: DE89016574
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107* -- Fusion Energy-- Plasma Research-- Instabilities
CLOSED PLASMA DEVICES
DOCUMENT TYPES
INSTABILITY
ION TEMPERATURE
PHYSICAL PROPERTIES
PLASMA INSTABILITY
PROGRESS REPORT
TEMPERATURE GRADIENTS
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES