A motional Stark effect polarimeter with five viewing points has been installed to obtain current profiles in the JT-60U tokamak. Offset angles caused by Faraday rotation were calibrated by rapidly moving a plasma, keeping the $q$ profile unchanged. Polarized background light was observed and its effect was corrected by detecting the light which had a wavelength close to that of the beam emission. Current profiles in a current rampdown discharge were measured, and the $q$ value at the inversion radius of the sawtooth oscillation agreed with the theoretical value (unity) within $10$\%.
%0 Journal Article
%1 fujita.1997
%A Fujita, T.
%A Kuko, H.
%A Sugie, T.
%A Isei, N.
%A Ushigusa, K.
%D 1997
%J Fusion Engineering and Design
%K JT-60U MSE diagnostics tokamak
%P 289-292
%R 10.1016/S0920-3796(96)00659-X
%T Current profile measurements with motional Stark effect polarimeter in the JT-60U tokamak
%U http://dx.doi.org/10.1016/S0920-3796(96)00659-X
%V 34--35
%X A motional Stark effect polarimeter with five viewing points has been installed to obtain current profiles in the JT-60U tokamak. Offset angles caused by Faraday rotation were calibrated by rapidly moving a plasma, keeping the $q$ profile unchanged. Polarized background light was observed and its effect was corrected by detecting the light which had a wavelength close to that of the beam emission. Current profiles in a current rampdown discharge were measured, and the $q$ value at the inversion radius of the sawtooth oscillation agreed with the theoretical value (unity) within $10$\%.
@article{fujita.1997,
abstract = {A motional Stark effect polarimeter with five viewing points has been installed to obtain current profiles in the JT-60U tokamak. Offset angles caused by Faraday rotation were calibrated by rapidly moving a plasma, keeping the $q$ profile unchanged. Polarized background light was observed and its effect was corrected by detecting the light which had a wavelength close to that of the beam emission. Current profiles in a current rampdown discharge were measured, and the $q$ value at the inversion radius of the sawtooth oscillation agreed with the theoretical value (unity) within $10$\%.},
added-at = {2009-07-03T12:17:32.000+0200},
author = {Fujita, T. and Kuko, H. and Sugie, T. and Isei, N. and Ushigusa, K.},
biburl = {https://www.bibsonomy.org/bibtex/2441d3796b32521e2638f8a14400c0907/prodrigues},
description = {MSE implementation on JT-60U.},
doi = {10.1016/S0920-3796(96)00659-X},
interhash = {5b8b56ec4d0b4b0d2085a9b2ef9867e1},
intrahash = {441d3796b32521e2638f8a14400c0907},
issn = {0920-3796},
journal = {Fusion Engineering and Design},
keywords = {JT-60U MSE diagnostics tokamak},
pages = {289-292},
timestamp = {2009-07-06T12:45:44.000+0200},
title = {Current profile measurements with motional Stark effect polarimeter in the JT-60U tokamak},
url = {http://dx.doi.org/10.1016/S0920-3796(96)00659-X},
volume = {34--35},
year = 1997
}