Frequency tuning of the CEBAF upgrade cavities

Conference · Mon Mar 01 04:00:00 EST 1999

DOI:https://doi.org/10.1109/PAC.1999.795403· OSTI ID:755239

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

Long-term plans for CEBAF at Jefferson Lab calls 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.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 755239
• Report Number(s): DOE/ER/40150-1427; JLAB-ACT-99-05
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
CEBAF ACCELERATOR
GEV RANGE 10-100
MODIFICATIONS
PLANNING
RF SYSTEMS
SPECIFICATIONS
SUPERCONDUCTING CAVITY RESONATORS
TUNING