Simulation of a New Plasma Mitigation Method by Transferring Part Poloidal Magnetic Energy in J-TEXT
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The magnitude of the damaging effect caused by plasma disruptions increases with the energy dissipated inside the vacuum vessel (VV) during plasma disruptions. To mitigate the disruption damage, a new method aiming at reducing the total energy dissipated inside the VV is proposed. By adding a group of coils on tokamak that are inductively coupled with plasma and conducting these coils during disruption, part of the poloidal magnetic energy can be coupled and be dissipated outside the VV, which leads to a reduction of the energy dissipated inside the VV. This new method is named poloidal magnetic energy transfer (MET) and the coils are named energy transfer coils. This method is firstly proposed and analyzed in J-TEXT. The principle of MET is described and the effect of MET is calculated with a simplified lump-parameter circuit. A 23 % reduction of the magnetic energy dissipated inside the VV can be obtained.
KeywordsTokamak Plasma disruption Disruption mitigation Magnetic energy transfer J-TEXT
This work is supported by the National ITER Project of China (No. 2013GB113003 and 2015GB111002) and the Fundamental Research Funds for the Central Universities, HUST: cx-15-061.
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