학술논문
Internal measurement of magnetic turbulence in ELMy H-mode tokamak plasmas.
Document Type
Letter
Author
Source
Subject
*MAGNETIC measurements
*PLASMA turbulence
*TURBULENCE
*PLASMA confinement
*POLARIMETRY
*PEDESTALS
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Language
ISSN
1070-664X
Abstract
Magnetic turbulence is directly observed internally in the pedestal of ELMy H-mode tokamak plasmas using a newly developed Faraday-effect polarimetry measurement. Fluctuation amplitude is δ b r ≥ 15 G (150–500 kHz), with a ratio of magnetic to density fluctuation | δ b r / B | / | δ n / n | ≥ 0.15. Magnetic turbulence is identified as resulting from micro-tearing-instability and mode growth accompanied by degraded plasma confinement is observed. [ABSTRACT FROM AUTHOR]