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Detailed design of the vacuum feedthrough for the ion cyclotron radio frequency(ICRF) antenna in EAST, along with an electro-analysis and thermal structural analysis, is presented.The electric field, the voltage standing wave ratio (VSWR) and the stresses in the vacuumfeedthrough are studied. A method using the rings of oxygen-free copper as the cushion and macrobeamplasma arc welding is applied in the assembly to protect the ceramic from being damagedduring welding. The vacuum leak test on the prototype of vacuum feedthrough is introduced.
Detailed design of the vacuum feedthrough for the ion cyclotron radio frequency (ICRF) antenna in EAST, along with an electro-analysis and thermal structural analysis, is presented. The electric field, the voltage standing wave ratio (VSWR) and the stresses in the A method using the rings of oxygen-free copper as the cushion and macro beamplasma arc welding is applied in the assembly to protect the ceramic from being damagedduring welding. The vacuum leak test on the prototype of vacuum feedthrough is introduced.