RETRACTED ARTICLE: Effects of Hot Limiter Biasing on Tokamak Runaway Discharges

In this research hot limiter biasing effects on the Runaway discharges were investigated. First wall of the tokamak reactors can affects serious damage due to the high energy runaway electrons during a major disruption and therefore its life time can be reduced. Therefore, it is important to find me...

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Bibliographic Details
Published in:Journal of fusion energy 2013-10, Vol.32 (5), p.580-588
Main Authors: Salar Elahi, A., Ghoranneviss, M., Ghanbari, M. R.
Format: Article
Language:English
Subjects:
Analysis
Atoms & subatomic particles
Control methods
Discharge
Electric fields
Electrodes
Electrons
Energy
Energy Systems
Field coils
Magnetic fields
Nuclear Energy
Nuclear Fusion
Original Research
Physics
Physics and Astronomy
Plasma
Plasma currents
Plasma Physics
Radiation
Spectrum analysis
Sustainable Development
Tokamak devices
Tokamaks
Velocity
Citations: Items that this one cites
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Summary:In this research hot limiter biasing effects on the Runaway discharges were investigated. First wall of the tokamak reactors can affects serious damage due to the high energy runaway electrons during a major disruption and therefore its life time can be reduced. Therefore, it is important to find methods to decrease runaway electron generation and their energy. Tokamak limiter biasing is one of the methods for controlling the radial electric field and can induce a transition to an improved confinement state. In this article generation of runaway electrons and the energy they can obtain will be investigated theoretically. Moreover, in order to apply radial biasing an emissive limiter biasing is utilized. The biased limiter can apply +380 V in the status of cold and hot to the plasma and result in the increase of negative bias current in hot status. In fact, in this experiment we try to decrease the generation of runaway electrons and their energy by using emissive limiter biasing inserted on the IR-T1 tokamak. The mean energy of these electrons was obtained by spectroscopy of hard X-ray. Also, the plasma current center shift was measured from the vertical field coil characteristics in presence of limiter biasing. The calculation is made focusing on the vertical field coil current and voltage changes due to a horizontal displacement of plasma column.
ISSN:0164-0313
1572-9591
DOI:10.1007/s10894-013-9618-9