A feasibility study of an infrared tangential viewing polarimeter for measurement of the electron density profile in ITER (abstract)

Journal Article · Wed Jan 01 04:00:00 EST 1997 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1147909· OSTI ID:451840

Ma, C H; Hutchinson, D P; Richards, R K ^[1]; Irby, J ^[2]

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1. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
2. MIT Plasma Fusion Center, Cambridge, Massachusetts 02139 (United States)

Preliminary results of a feasibility study of a CO{sub 2} laser tangential viewing polarimeter for measuring electron density profiles in ITER are reported. For ITER plasma parameters and a polarimeter wavelength of 10.6 {mu}m, a Faraday rotation of up to 26{degree} is predicted. An electro-optic polarization modulation technique has been developed at ORNL. Laboratory tests of this polarimeter demonstrated a sensitivity of {le}0.01{degree}. Because of the similarity in the expected Faraday rotation in ITER and Alcator C-Mod, a collaboration between ORNL and the MIT Plasma Fusion Center has been undertaken to test this polarimeter system on Alcator C-Mod. A 10.6 {mu}m polarimeter has been constructed and integrated into the existing C-Mod multichannel two-color interferometer. Detailed analyses and the preliminary results of the C-Mod measurements will be shown.{copyright} {ital 1997 American Institute of Physics.}

• Research Organization: Oak Ridge National Laboratory
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 451840
• Report Number(s): CONF-960543--
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 1 Vol. 68; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALCATOR DEVICE
COLOR
ELECTRON DENSITY
FARADAY EFFECT
FEASIBILITY STUDIES
INFRARED RADIATION
ITER TOKAMAK
PLASMA DENSITY
PLASMA DIAGNOSTICS
POLARIMETERS
POLARIMETRY
SENSITIVITY
TESTING
TOKAMAK DEVICES
electro-optical modulation
measurement by laser beam
plasma toroidal confinement