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

Volume

2

fYear

1999

fDate

1999

Firstpage

931

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1999. Proceedings of the 1999

Conference_Location

New York, NY

Print_ISBN

0-7803-5573-3

Type

conf

DOI

10.1109/PAC.1999.795404

Filename

795404