Title :
A magnetostrictive tuning mechanism for SRF cavities
Author :
Joshi, Chad ; Bent, Bruce ; Drury, Michael ; Preble, Joseph ; Nguyen, Viet
Author_Institution :
Energen Inc., Billerica, MA, USA
Abstract :
Energen, Inc. has designed, built and demonstrated a fine tuning mechanism for superconducting radiofrequency (SRF) cavities used in particle accelerators. This tuner is based on giant magnetostrictive materials being developed by Energen Inc. Magnetostrictors elongate when exposed to a small magnetic field. This extension is reversible and repeatable enabling a wide range of applications. The magnetostrictive tuner was specifically designed to meet the requirements of the Thomas Jefferson National Accelerator Facility in Newport News, VA. The tuner consists of a high force linear actuator that elongates the cavity along its axis thereby changing its resonant frequency. It is installed in the dead leg of the existing mechanical tuner. This mechanism has a motion range that provides a tuning range of up to 6400 Hz. Preliminary tests at Jefferson Laboratory demonstrated cavity tuning capability
Keywords :
accelerator cavities; electron accelerators; linear colliders; magnetostrictive devices; superconducting cavity resonators; CEBAF; SRF cavities; Thomas Jefferson National Accelerator Facility; cavity tuning capability; fine tuning mechanism; giant magnetostrictive materials; high force linear actuator; magnetostrictive tuning mechanism; magnetostrictors; particle accelerators; resonant frequency; superconducting radiofrequency cavities; Linear particle accelerator; Magnetic fields; Magnetic materials; Magnetic resonance; Magnetostriction; Radio frequency; Superconducting magnets; Superconducting materials; Tuners; Tuning;
Conference_Titel :
Particle Accelerator Conference, 1999. Proceedings of the 1999
Conference_Location :
New York, NY
Print_ISBN :
0-7803-5573-3
DOI :
10.1109/PAC.1999.795404
