Innovative Materials for Microwave Tube Applications

The Phase I program investigated two applications for innovative coatings to address existing issues with RF source components in Navy systems. Calabazas Creek Research, Inc. (CCR) and N.C. State University (NCSU) performed analysis and experiments to determine if the proposed approaches would provide the require functionality.CCR investigated potential coatings to address arcing issues with RF sources subjected to stand-by operation. CCR identified a mechanism whereby the impact of barium oxide contamination could be mitigated by reducing or eliminating the availability of oxygen using a sputtered coating. Two potential coatings were applied to focus electrodes for the SPS-49 klystron. The effectiveness of the coating will be confirmed during the Phase I Option and the Phase II program.The program demonstrated that a coating could be applied to the internal surfaces of an RF source assembly to dramatically reduce corrosion. Analysis showed the coating was successfully applied to the internal device structures, confirming the effectiveness in achieving uniform and conformal coatings in complex structures.The Phase II program will complete the development of these two technologies, including integration into products used in Navy systems. Prototype products will be tested to confirm program goals are achieved.