Electrical Breakdown Characteristic of Oxygen-free Copper in Vacuum

Abstract

The realization of a stable operation of the accelerator structure at the acceleration field of 75MV/m is one of the most critical issues of the linac design for linear collider. Therefore, the analysis of surface conditions of oxygen-free copper enable to stand such electric high field is required. In this paper, the effect of the surface roughness of copper electrodes and cutting fluid on the electrical breakdown characteristics has been discussed. The experiments showed that the breakdown field decreases with increasing the surface roughness of the electrode and due to the cutting fluid remaining the electrode surface.