Description and expected performance of flight-model, 12-gigahertz, output stage tube for the communications technology satellite

The flight model output stage tube for the Communications Technology Satellite is described. The output stage tube is a 12-GHz, 200-W, coupled cavity traveling wave tube. The tube has a multistage depressed collector for efficiency enhancement. Collector cooling is accomplished by direct radiation to space. Expected rf performance and factors affecting on orbit performance and life are discussed

Clayton Enterprise, 04-20-1906

https://digitalrepository.unm.edu/clayton_ec_news/1119/thumbnail.jp

Clayton Enterprise, 08-03-1906

https://digitalrepository.unm.edu/clayton_ec_news/1134/thumbnail.jp

Clayton Enterprise, 05-26-1905

https://digitalrepository.unm.edu/clayton_ec_news/1073/thumbnail.jp

Clayton Enterprise, 09-07-1906

https://digitalrepository.unm.edu/clayton_ec_news/1139/thumbnail.jp

Clayton Enterprise, 05-19-1905

https://digitalrepository.unm.edu/clayton_ec_news/1072/thumbnail.jp

Ion beam treatment of potential space materials at the NASA Lewis Research Center

Ion source systems in different configurations, have been used to generate unique morphologies for several NASA space applications. The discharge chamber of a 30 cm ion source was successfully used to texture potential space radiator materials for the purpose of obtaining values of thermal emittance greater than 0.85 at 700 and 900 K. High absorptance surfaces were obtained using ion beam seed texturing, for space radiator materials that were flown on the Long Duration Exposure Facility (LDEF) for 5.8 years in space. An ion source discharge chamber was also used to develop electrode surfaces with suppressed secondary electron emission characteristics for use in collectors in microwave amplifier traveling wave tubes. This was accomplished by sputtering textured carbon onto copper as well as texturing copper using tantalum and molybdenum as sacrificial texture inducing seeding materials. In a third configuration, a dual ion beam system was used to generate high transmittance diamondlike carbon (DLC) films

Clayton Enterprise, 09-01-1905

https://digitalrepository.unm.edu/clayton_ec_news/1087/thumbnail.jp

Clayton Enterprise, 05-12-1905

https://digitalrepository.unm.edu/clayton_ec_news/1071/thumbnail.jp

Clayton Enterprise, 03-09-1906

https://digitalrepository.unm.edu/clayton_ec_news/1113/thumbnail.jp