Diagnostic instrument for the measurement of poloidal magnetic fields in tokamaks

Journal Article · Fri Aug 01 04:00:00 EDT 1986 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1138583· OSTI ID:5517905

West, W P; Thomas, D M; Ensberg, E S; deGrassie, J S; Baur, J F

A diagnostic system has been developed to measure the direction of the local magnetic field within the plasma of a tokamak by making use of Zeeman splitting in an injected neutral lithium beam. A linearly polarized dye laser is used to pump the ..pi.. component of the /sup 2/S-italic-/sup 2/P-italic resonant transition. The laser polarization is rotated at a fixed frequency, and phase analysis of the subsequent fluorescence identifies the local field direction. The instrument can monitor many radial points within the plasma simultaneously, allowing a current density profile to be determined on a single shot basis.

• Research Organization: GA Technologies Inc., P. O. Box 85608, San Diego, California 92138
• OSTI ID: 5517905
• Journal Information: Rev. Sci. Instrum.; (United States), Journal Name: Rev. Sci. Instrum.; (United States) Vol. 57:8; ISSN RSINA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
ALKALI METALS
BEAM INJECTION
CLOSED PLASMA DEVICES
CURRENT DENSITY
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSION SPECTROSCOPY
FLUORESCENCE SPECTROSCOPY
LASER RADIATION
LITHIUM
MAGNETIC FIELD CONFIGURATIONS
MAGNETIC FIELDS
METALS
NEUTRAL ATOM BEAM INJECTION
PLASMA DIAGNOSTICS
RADIATIONS
SPECTROSCOPY
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
ZEEMAN EFFECT