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Study of the Bootstrap Current in the EAST Tokamak

Author: ShenZuo
Tutor: ZhangXianMei
School: East China University of Science and Technology
Course: Atomic and Molecular Physics
Keywords: Bootstrap current Numerical Simulation Tokamak
CLC: TL631.24
Type: Master's thesis
Year: 2011
Downloads: 24
Quote: 0
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Abstract


The bootstrap current is the plasma spontaneously induced current for the Tokamak run is a very economical means . Adjusting the distribution of plasma parameters in the experiment can be by various means to control the size and distribution of the bootstrap current , have played an important role in improving the plasma confinement , the synergistic effect of the other outside the non-inductive current can reach the plasma current full-wave drive . In the future , a large share of the bootstrap current is essential for steady-state operation of the tokamak . This thesis is the first place to study the relationship between the plasma parameters and the bootstrap current to observe the impact of changes in a single parameter of the bootstrap current , the study found that the share of the impact of the total current density on the temperature of the plasma center and center bootstrap larger. The temperature distribution and the density distribution of little influence on the bootstrap current distribution influential , and the temperature distribution in the bootstrap current share greater impact , and the density distribution of the bootstrap current . Geometric parameters , the longitudinal field , the effective charge of the bootstrap current have varying degrees of impact . In this thesis work in the fixed total current situation , different distribution of lower hybrid drive current of the bootstrap current study . Off-axis lower hybrid current distribution can effectively improve the the bootstrap current share . The results of tokamak fusion experiments has certain reference value and theoretical guidance .

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CLC: > Industrial Technology > Nuclear technology > Controlled thermonuclear reactions ( fusion reaction theory and experimental facilities) > Thermonuclear device > Magnetic confinement devices > Closed plasma device > Tokamak
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