INNOVATIVE TUNING TECHNIQUES FOR LOW-BETA SRF CAVITIES *

Superconducting low- β cavities enable and often operate with high loaded Q’s and small loaded bandwidths, making them extremely sensitive to RF frequency errors which are large relative to the loaded cavity bandwidth. Mechanical vibrations which couple to the cavity field drive RF frequency errors which require a combination of tuners and extra RF power to compensate. This paper presents an overview of innovate techniques for low- β (0.05 < β < 0.6) superconducting cavity design and tuning to maximize RF field stability.