Identification of errors in the electron density measurements of a tangential interferometer/polarimeter system during a tokamak discharge

Journal Article · Mon Oct 15 00:00:00 EDT 2012 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4745223· OSTI ID:22093942

Arakawa, H.; Kawano, Y.; Itami, K. ^[1]

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1. Japan Atomic Energy Agency, 801-1, Mukoyama, Naka 311-0193 (Japan)

A new method for the comparative verification of electron density measurements obtained with a tangential interferometer and a polarimeter during a discharge is proposed. The possible errors associated with the interferometer and polarimeter are classified by the time required for their identification. Based on the characteristics of the errors, the fringe shift error of the interferometer and the low-frequency noise of the polarimeter were identified and corrected for the JT-60U tangential interferometer/polarimeter system.

• OSTI ID: 22093942
• Journal Information: Review of Scientific Instruments, Vol. 83, Issue 10; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CONFINEMENT
ELECTRIC DISCHARGES
ELECTRON DENSITY
INTERFEROMETERS
JT-60U TOKAMAK
PLASMA DENSITY
PLASMA DIAGNOSTICS
POLARIMETERS
VERIFICATION