Author :
Kim, Hyoung S. ; Uhm, Han S. ; Park, Gun S.
Abstract :
Manufacturing technologies for heavily-loaded helix TWT has been developed in Korea. There are many devices equipped for the manufacturing TWT in a new facility. We have designed and made laser welding M/C, RF Brazer, vacuum exhaust system, pyrolitic deposition M/C, triangulation & compression M/C for manufacturing helix TWT for special purpose. Besides, we have developed key technologies for helix TWT, such as fixture design for assembly and test, furnace brazing for part assembly, RF brazing triangulation & compression for helix circuit assembly, magnetization & tuning for PPM, metalizing & nickelizing for ceramic metallization, carbon coating on the ceramic rod, laser welding for assembly with coupler and helix circuit, vacuum exhaust for baking TWT envelope, vacuum sealing inspection, and thermal analysis on the couplers. With these technologies and devices, we have assembled electron gun, RF input/output connector, helix circuit, collector, and ppm magnets. The final-assembled TWT has been tested, which shows 36 dB and 9 GHz.
Keywords :
brazing; electric connectors; electron guns; fixtures; laser beam welding; magnetisation; metallisation; thermal analysis; travelling wave tubes; 36 dB; 9 GHz; Korea; RF brazer; RF brazing triangulation; RF input/output connector; TWT envelope; baking TWT; carbon coating; ceramic metallization; ceramic rod; collector; compression M/C; couplers; electron gun; heavily loaded helix TWT; helix circuit assembly; helix traveling wave tube; hot test; laser welding; magnetization; nickelization; ppm magnets; pyrolitic deposition; thermal analysis; triangulation; vacuum exhaust system; vacuum sealing inspection; Assembly; Ceramics; Circuit testing; Coupling circuits; Laser tuning; Magnetic circuits; Manufacturing; Optical design; Radio frequency; Welding;
