Frequency tuning of the CEBAF upgrade cavities

Author

Delayen, J.R. ; Doolittle, L. ; Feldl, E. ; Nguyen, V. ; Sachleben, W.

Author_Institution

Thomas Jefferson Nat. Accel. Facility, Newport News, VA, USA

Volume

2

fYear

1999

fDate

1999

Firstpage

928

Abstract

Long-term plans for CEBAF at Jefferson Lab call for achieving 12 GeV in the middle of the next decade and 24 GeV after 2010. In support of these plans, an Upgrade Cryomodule capable of providing more than twice the voltage of the existing ones is under development. One requirement is to operate the superconducting cavities, which are 40% longer than existing ones, at 2.5 times the original design gradient with the same amount of RF power. This puts stringent requirements on the accuracy of the frequency tuner: range of 400 kHz and resolution of 1 Hz. A new tuner design to meet these requirements is under development. This system avoids problem areas of previous designs by holding to the principles of not placing moving parts in the vacuum and/or low temperature space, and of having all drive components readily accessible for maintenance and replacement without cryomodule warm up

Keywords

accelerator cavities; electron accelerators; linear colliders; low-temperature production; superconducting cavity resonators; 12 GeV; 24 GeV; 400 kHz; CEBAF upgrade cavities; Upgrade Cryomodule; drive components; frequency tuning; low temperature space; superconducting cavities; Delay; Fluctuations; Frequency; Linear particle accelerator; Particle accelerators; Temperature; Tuners; Tuning; Vacuum systems; Voltage;

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.1999.795403

Filename

795403