Dual mode (ordinary--extraordinary) correlation reflectometry for magnetic field and turbulence measurements (invited)

Journal Article · Mon Jan 01 04:00:00 EST 2001 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1319863· OSTI ID:40204793

Gilmore, M; Peebles, W A; Nguyen, X V

Dual mode [ordinary--extraordinary (O--X)] correlation reflectometry has the potential advantage of being able to determine magnetic field strength, |{und B}|, simultaneously with correlation properties of turbulence (e.g., radial correlation length, coherency, power spectra, etc.). Controlled dual mode correlation reflectometry experiments, conducted in the Large Plasma Device at UCLA, are presented. The purpose of these experiments was (1) to demonstrate the proof of principle of |{und B}| measurement, and (2) to make detailed comparisons between dual mode and single mode (O--O,X--X) reflectometer, and Langmuir probe radial correlation measurements. It is shown that, in these experiments, |{und B}| can be determined from O--X correlation measurements, interpreted via a one-dimensional numerical model. In addition, good agreement is found between correlation lengths (within 10%--15%), coherency, and power spectra measured by O--X, O--O, and X--X reflectometry, and a Langmuir probe array.

• Sponsoring Organization: (US)
• OSTI ID: 40204793
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 1 Vol. 72; ISSN 0034-6748
• Publisher: The American Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
LANGMUIR PROBE
MAGNETIC FIELDS
PHYSICS
PLASMA
SPECTRA
TURBULENCE
UCLA