Design of High Power Vacuum Feedthrough for Multipactor Effect Suppression
- Resource Type
- Conference
- Authors
- Jang, Kwangho; Wi, Hyunho; Saito, Kenji; Kwak, Jonggu; Wang, Sonjong
- Source
- 2019 International Vacuum Electronics Conference (IVEC) Vacuum Electronics Conference (IVEC), 2019 International. :1-2 Apr, 2019
- Subject
- Aerospace
Communication, Networking and Broadcast Technologies
Engineered Materials, Dielectrics and Plasmas
Fields, Waves and Electromagnetics
Vacuum Feedthrough (VFT)
KSTAR
Current drive
Multipactor
- Language
A helicon current drive system need the high power vacuum feed-through (VFT) for the of upgraded KSTAR helicon current drive system. However, multipactor effect shows a problem of RF reflection in VFT vacuum region. So the proposed structure was to place a low electric field in the ceramic using a standing wave. The designed VFT shows the $\mathrm{E}_{\mathrm{z}}$ value close to zero and the electric field absolute value of about 1.7kV/cm when transmitting 1MW in ceramic. It showed the high Q value of transmission characteristics at 476MHz.