Uncertainty propagation in [ital q] and current profiles derived from motional Stark effect polarimetry on TFTR (abstract)

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

DOI:https://doi.org/10.1063/1.1146415· OSTI ID:6711537

Batha, S H; Levinton, F M ^[1]; Bell, M G; Wieland, R M ^[2]; Hirschman, S P ^[3]

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1. Fusion Physics and Technology, Inc., Torrance, California 90503-1673 (United States)
2. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)
3. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)

The magnetic-field pitch-angle profile, [gamma][sub [ital p]]([ital R])[equivalent to]arctan([ital B][sub pol]/[ital B][sub tor]), is measured on the TFTR tokamak using a motional Stark effect (MSE) polarimeter. Measured profiles are converted to [ital q] profiles with the equilibrium code VMEC. Uncertainties in the [ital q] profile due to uncertainties in the [gamma][sub [ital p]]([ital R]), magnetics, and kinetic measurements are quantified. Subsequent uncertainties in the VMEC-calculated profiles of current density and shear, both of which are important for stability and transport analyses, are also quantified. Examples of circular plasmas under various confinement modes, including the supershot and [ital L] mode, will be given.

• DOE Contract Number: AC02-76CH03073
• OSTI ID: 6711537
• 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
COMPUTER CALCULATIONS
CURRENTS
ELECTRIC CURRENTS
INCLINATION
PLASMA DIAGNOSTICS
PLASMA RADIAL PROFILES
POLARIMETRY
STARK EFFECT
TFTR TOKAMAK
THERMONUCLEAR DEVICES
TOKAMAK DEVICES