Modifications of plasma edge electric field and confinement properties by limiter biasing on the KT-5C tokamak

Experiments using a biased multiblock limiter in the KT-5C tokamak show that positive biasing is more effective than negative biasing in modifying the edge electric field, suppressing fluctuations and improving plasma confinement. The biasing effect varies with the limiter area, the toroidal magneti...

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Published in:Journal of plasma physics 1995-12, Vol.54 (3), p.393-400
Main Authors: Gao, Hui, Zhai, Kan, Wen, Yi-Zhi, Wan, Shu-De, Wang, Gui-Ding, Yu, Chang-Xun
Format: Article
Language:English
Subjects:
Electric field effects
Electric fields
Electrons
Exact sciences and technology
Limiters
Magnetic confinement and equilibrium
Magnetic fields
Modification
Physics
Physics of gases, plasmas and electric discharges
Physics of plasmas and electric discharges
Plasma confinement
Plasmas
Temperature
Tokamaks
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cited_by cdi_FETCH-LOGICAL-c301t-b93a3ce8bea79efc5f771899998e5dc4d385c35d4f121c88b0b02321cd94fb4d3
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container_issue 3
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container_title Journal of plasma physics
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creator Gao, Hui
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Wen, Yi-Zhi
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description Experiments using a biased multiblock limiter in the KT-5C tokamak show that positive biasing is more effective than negative biasing in modifying the edge electric field, suppressing fluctuations and improving plasma confinement. The biasing effect varies with the limiter area, the toroidal magnetic field and the biasing voltage. By positive biasing, the edge profiles of the plasma potential, the electron temperature and the density become steeper, resulting in a reduced edge particle flux, an increased global particle confinement time and lower fluctuation levels of the edge plasma.
doi_str_mv 10.1017/S0022377800018560
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source Cambridge University Press:JISC Collections:Full Collection Digital Archives (STM and HSS) (218 titles)
subjects Electric field effects
Electric fields
Electrons
Exact sciences and technology
Limiters
Magnetic confinement and equilibrium
Magnetic fields
Modification
Physics
Physics of gases, plasmas and electric discharges
Physics of plasmas and electric discharges
Plasma confinement
Plasmas
Temperature
Tokamaks
title Modifications of plasma edge electric field and confinement properties by limiter biasing on the KT-5C tokamak
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