Correlation reflectometry: An experimental investigation of measurement capability
- EE and MANE Departments and Institute of Plasma and Fusion Research, University of California, Los Angeles, California 90024 (United States)
The correlation reflectometer was conceived as a method of determining the interior correlation length of plasma turbulence in a nonperturbing and localized manner. Currently, measurements on different machines have produced different lengths and tendencies. Theories have been used to interpret the data from this diagnostic, but the diagnostic and theories remain unverified by direct validation with other diagnostics. As part of its ongoing research program aimed at the understanding and full utilization of reflectometry, UCLA has initiated a direct comparison between turbulent correlation lengths as measured by reflectometry and Langmuir probes. This investigation is performed on the CCT tokamak at UCLA. Initial results show good agreement between the two diagnostics, with radial coherence lengths in the range 1.0--3.0 cm depending upon the frequency of the fluctuation. A detailed description of the experiment and initial results are presented.
- DOE Contract Number:
- FG03-86ER53225
- OSTI ID:
- 6700879
- Journal Information:
- Review of Scientific Instruments; (United States), Vol. 66:1; ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CONTINUOUS CURRENT TOKAMAK
TURBULENCE
PLASMA DIAGNOSTICS
OPTICAL REFLECTION
COMPARATIVE EVALUATIONS
FLUCTUATIONS
LANGMUIR PROBE
CLOSED PLASMA DEVICES
ELECTRIC PROBES
EVALUATION
PROBES
REFLECTION
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
VARIATIONS
700320* - Plasma Diagnostic Techniques & Instrumentation- (1992-)