A swept two-frequency microwave reflectometer for edge density profile measurements on TFTR

Journal Article · Thu Oct 01 00:00:00 EDT 1992 · Review of Scientific Instruments; (United States)

DOI:https://doi.org/10.1063/1.1143654· OSTI ID:7153961

Hanson, G R; Wilgen, J B; Bigelow, T S; Collazo, I; Thomas, C E ^[1]

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1. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-8072 (United States)

The edge density profile can play a significant role in determining the plasma confinement and the coupling of the ion cyclotron resonance frequency (ICRF) heating power to the plasma. To experimentally measure the edge density profile in the Tokamak Fusion Test Facility (TFTR), a two-frequency microwave reflectometer is being built. This reflectometer will operate in a swept two-frequency configuration between 91 and 118 GHz using the extraordinary mode. The frequency separation between the two microwave signals will be held constant while the signals are swept across the frequency band. By measuring the differential phase delay between these two signals, the density profile can be reconstructed. Two-frequency profile reflectometry is discussed and results of modeling of this type of reflectometer measurement for TFTR are shown. Finally, the design of the TFTR edge profile reflectometer microwave system is described.

• OSTI ID: 7153961
• Journal Information: Review of Scientific Instruments; (United States), Vol. 63:10; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
PLASMA DIAGNOSTICS
MICROWAVE RADIATION
TFTR TOKAMAK
ANTENNAS
ICR HEATING
PLASMA DENSITY
WAVEGUIDES
CLOSED PLASMA DEVICES
ELECTRICAL EQUIPMENT
ELECTROMAGNETIC RADIATION
EQUIPMENT
HEATING
HIGH-FREQUENCY HEATING
PLASMA HEATING
RADIATIONS
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
700320* - Plasma Diagnostic Techniques & Instrumentation- (1992-)