Copper, Tungsten and Molybdenum RF Breakdown Experiments

In this study, the experimental results for tungsten and molybdenum are compared to copper under the same high field conditions (350 MV/m and 500 MV/m). The RF pulse length for all three experiments is 150 ns. Tungsten and molybdenum are both refractory metals with robust physical properties that are recognized for their high melting point, low thermal expandability, low vapour pressure, and high yield strength. The CLIC study group at CERN has conducted several accelerator experiments at 30 GHz with structures that have tungsten and molybdenum iris inserts.