Electromagnetically Forming a Seamless Niobium Radio Frequency (RF) Superconducting Cavity--Advanced Energy Systems, Inc., 27 Industrial Blvd., Unite E, Medford, NY 11763-2286; 516-345-6264
Mr. Elvin Burger, Principal Investigator
Mr. Anthony Favale, Business Official
DOE Grant No. DE-FG02-99ER82727
Amount: $628,005

This project will further develop the process of electromagnetically forming a niobium radio frequency (RF) superconducting cavity for nuclear physics accelerators. This process eliminates costly machining and electron beam welding and improves performance characteristics. Phase I used a finite element analysis to determine the power required in the magnetic coils that would be used for forming the cavity, as well as the arrangement of the coils with respect to the workpiece and mandrel. An axisymmetric transient magnetic model was developed and used to determine eddy currents, power loss due to these eddy currents, and induced magnetic forces in the niobium workpiece, all as a function of time. These results were used to develop a detailed design of the tooling required to electromagnetically form a complete superconducting RF cavity. The Phase II project will fabricate a seamless niobium RF superconducting cavity and test it at the Department of Energy's Jefferson Laboratory Cryogenic Facility.

Commercial Applications and Other Benefits as described by the awardee: Niobium exhibits superconductivity, that is, the lack of electrical resistance at very low temperatures. As a result, niobium forming should be useful in electron beam accelerators, power generation, propulsion, and other electronic devices.