Fiber-optic heterodyne phase-shift measurement of plasma current

Journal Article · Sun Jun 01 04:00:00 EDT 1986 · Appl. Opt.; (United States)

DOI:https://doi.org/10.1364/AO.25.001770· OSTI ID:5405776

Chandler, G I; Forman, P R; Jahoda, F C; Klare, K A

By combining twisted optical sensing fiber and heterodyne phase detection of circular birefringence we have (a) overcome the distortion problem caused by residual linear birefringence in the Faraday rotation method of measuring enclosed current and (b) used only a single output detector without requiring intensity normalization. Resolution of 400 ampere-turns has been obtained in the hostile electromagnetic environment of a working thermonuclear fusion research device. The fiber was simply wound around the existing machine. The measured values are in excellent agreement with those of the electrical Rogowski coil installed when the machine was built.

• Research Organization: Los Alamos National Laboratory, Los Alamos, New Mexico 87545
• OSTI ID: 5405776
• Journal Information: Appl. Opt.; (United States), Journal Name: Appl. Opt.; (United States) Vol. 25:11; ISSN APOPA
• Country of Publication: United States
• Language: English

Related Subjects

657005 -- Theoretical Physics-- Optics
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BIREFRINGENCE
CURRENTS
ELECTRIC CURRENTS
ELECTRONIC EQUIPMENT
EQUIPMENT
FARADAY EFFECT
FIBER OPTICS
FIBERS
HETERODYNE RECEIVERS
LASL
MAGNETO-OPTICAL EFFECTS
MICROWAVE EQUIPMENT
NATIONAL ORGANIZATIONS
OPTICAL FIBERS
PHASE SHIFT
PLASMA DIAGNOSTICS
POLARIZATION
RADIO EQUIPMENT
REFRACTION
THERMONUCLEAR REACTORS
US AEC
US DOE
US ERDA
US ORGANIZATIONS