Investigation of the Dump Resistor for a Large Superconducting Coil

Abstract

A large superconducting coil needs a large resistor which dissipates the gigantic stored energy for emergency situations such as quench events. Simple dump resistor, which is made of stainless steel wire ropes with normal air-cooling, has been selected through the consideration of its feature. The results of the experiments using the wire ropes in diameter 26mm and 4mm, show their soundness as electrical resistance up to 800°C. It has been found that the inductance of this dump resistor is low enough. As an example, the dump resistors for the toroidal field coils of the International Thermonuclear Experimental Reactor (ITER), which is under design, has been designed.