SC Cavities Fast Tuning System Based on Piezoelectric Actuators

摘要

Free Electron Laser in Hamburg (FLASH) accelerator is composed of 40 superconducting (SC) cavities equipped with both single and double piezoelectric actuators. The piezo tuners are used to tune the cavity to its main operating frequency. Dedicated multichannel analog and digital control system has been designed, fabricated and connected to all accessible piezo tuners to meet such a large scale machine configuration [1]. The fast tuning system has been used to support high gradient, high current beam acceleration experiment (9 mA tests) carried out in Deutsches Elektronen Synchrotron (DESY). During the studies the DC and AC modes of piezoelectric actuators control have been applied and preliminary tested.