Correlation reflectometry: An experimental investigation of measurement capability

Journal Article · Sun Jan 01 04:00:00 EST 1995 · Review of Scientific Instruments; (United States)

DOI:https://doi.org/10.1063/1.1146235· OSTI ID:6700879

Rhodes, T L; Taylor, R J; Peebles, W A ^[1]

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1. 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), Journal Name: Review of Scientific Instruments; (United States) Vol. 66:1; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700320* -- Plasma Diagnostic Techniques & Instrumentation-- (1992-)
CLOSED PLASMA DEVICES
COMPARATIVE EVALUATIONS
CONTINUOUS CURRENT TOKAMAK
ELECTRIC PROBES
EVALUATION
FLUCTUATIONS
LANGMUIR PROBE
OPTICAL REFLECTION
PLASMA DIAGNOSTICS
PROBES
REFLECTION
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TURBULENCE
VARIATIONS