Magnetostrictive fast tuners for SRF cavities

Energen, Inc. has demonstrated new tuners based on magnetostrictive actuators to address SRF cavity fast tuning requirements for next-generation particle accelerators. Prototype fast tuners were fabricated and delivered to DESY, Argonne National Lab and Jefferson Lab. Results are reported from tests at Jefferson Laboratory, which were done under realistic operating conditions. In these tests, Energen´s fast tuner was found to have a tuning range double the required 1200 Hz and provided precise, nanometer-resolution motion. Slow tuner results have been reported in earlier papers.