%0 Journal Article
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%@archivingpolicy denypublisher denyfinaldraft12
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%3 edge density.pdf
%@dissemination WEBSCI
%X Edge density profiles were measured during natural and forced magnetic axis shifts in the low-aspect-ratio heliotron/torsatron CHS, using an 8 keV fast neutral lithium beam probe. The Shafranov shift of the magnetic axis (and hence the dislocation of the LCFS) that was negligible for a low density ECH discharge became substantial (similar to 4.5 cm) for a high density NBI discharge (<n(e)> similar to 2.5 x 10(13)cm(-3)) and the corresponding radius of the LCFS increased about 1.2 cm in major radius compared to the vacuum case. For NBI discharges with different settings of the vacuum magnetic axis R(ax) (fixed during the discharge), the measured edge density profiles indicated reasonable agreement between the theoretically and experimentally obtained LCFS radii for 90 cm < R(ax) < 101.6cm, while for R(ax) < 90 cm the measured radius was 10% larger than expected. When a change of R(ax) from 94.7 cm to 89.9 cm during a discharge was imposed externally, a well behaved plasma boundary moved inward smoothly by about 7.5 cm, while the steepness of the edge density profile changed for different values of R(ax). The steepest profile was attained for R(ax) = 92.1 cm when the highest energy content and average density were achieved.
%8 Sep.
%N 3
%T Edge Density Profile Variation During a Magnetic Axis Shift in the Chs Heliotron/Torsatron
%K EDGE DENSITY PROFILE, MAGNETIC AXIS SHIFT.
%@secondarytype PRE PI
%@group LAS-INPE-MCT-BR
%@copyholder SID/SCD
%@secondarykey INPE-12822-PRE/8112
%@issn 0164-0313
%2 sid.inpe.br/marciana/2005/03.08.16.06.16
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%B Journal of Fusion Energy
%@language English
%P 273-279
%4 sid.inpe.br/marciana/2005/03.08.16.06
%D 1993
%V 12
%A Ueda,  Mario,
%A Iguchi,  H.,
%A Yamada,  H.,
%A Okamura,  S.,
%A Nishimura,  K.,
%A Kubo,  S.,
%A Sagara,  A.,
%A Morita,  S, .,
%A Matsuoka,  K.,
%A Fujita,  J.,
%A Sasaki, S,
%@area FISMAT