Present Status of Superconducting Accelerating Cavities

Abstract

This paper reviews the development of superconducting RF cavities for particle accelerators during the past several years. Development of material and fabrication technique is described. Some of the accelerator project in the world using superconducting RF cavities are introduced. At present the most serious problem to get higher accelerating gradient is to understand and cure the electrons by field emission. If this problem is solved and the accelerating field of 20-30MV/m is obtained, superconducting cavities could be used for a linear collider of TeV energy region.