8-Channels piezo-driver-power amplifier for correction of SC cavities' deformations in linear accelerators

Superconducting (SC) resonant cavities are the integral part of accelerator models in linear accelerators. The 9-cell 1,3GHz cavites can be operated with high operating gradients up to 40MV/m. They are susceptible to small changes of dimension caused by Lorenz forces and mechanical vibrations. The piezoelectric based fast tuners, driven by power amplifiers, are dedicated for compensation purpose. The paper presents recent development in this field.