TWT Support Road Coating by MPCVD

Dielectric support rods such as alumina, quartz, BeO and diamond have been spaced around the helix to hold the helix in place and also to remove heat from helix. Interaction efficiency of TWT also depends on these support rod's shape and material among the other parameters 1 . For this purpose an homemade MPCVD 2 microwave plasma chemical vapor deposition) system has been built. The plasma characteristics and surface morphology of the rods and thermal analysis of the samples will be given.