Fusion Futures: Ceramic to Metal Bonding

The objective of this work package is to develop microwave vacuum windows for either circular or rectangular waveguide. There will be two general applications in which a ceramic is inserted into a waveguide or metallic wall: • Standard WR-## rectangular waveguide • Small circular or rectangular window with ceramic having a high index of refraction) The bonding should be compatible with ultra-high vacuum applications with leak rates kept below 10-9mbar/(l•s) The ceramic material is to be determined based on the suppliers capability, materials index of refraction and microwave transmission efficiency over the range of 25 to 400GHz. The metallic material is preferred to be either Aluminium (allow 6061 or 6062) and copper (CuCrZr).