Feasibility Study Of Nb/Cu Clad Superconducting Rf Cavities

For the future large scale application of superconducting (sc) rf cavities like TESLA, one has to fabricate the cavities cheaply to achieve high gradients and high Q values (E-acc > 25 MV/m, Q > 1 x 10(10)). The amount of niobium material has to be decreased and the complex welding structure should be eliminated to reduce the fabrication cost. We propose to fabricate seamless clad cavities out of niobium and copper material and report the results of a feasibility study.