Abstract
The China fusion engineering test reactor is a new tokamak device. The central solenoid (CS) model coil, which is responsible for developing and verifying the key manufacturing methods of a superconducting magnet, is now under engineering design. The rating current of the coil is 47.65 kA and total magnetically stored energy reaches 407 MJ, so a quench protection is required to discharge this huge stored energy. This paper gives a description of the quench protection of CS model coil. The circuit of the quench protection system is designed, which consists of the direct current circuit breaker, discharge resistor, diode, and fuse. The main parameters of these components were selected. The control system of quench protection is also introduced.
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