High-Q ferrite-tuned cavity

Technical Report · Mon Aug 01 04:00:00 EDT 1983

OSTI ID:5753864

Earley, L M; Thiessen, H A; Carlini, R D; Potter, J M

Rapid-cycling proton synchrotrons, such as the proposed LAMPF II accelerator, require approximately 10 MV per turn rf with 17% tuning range near 50 MHz. The traditional approach to ferrite-tuned cavities uses a ferrite which is longitudinally biased (rf magnetic field parallel to bias field). This method leads to unacceptably high losses in the ferrite. At Los Alamos, we are developing a cavity with transverse bias (rf magnetic field perpendicular to the bias field) that makes use of the tensor permeability of the ferrite. Initial tests of a small (10-cm-diam) quarter-wave singly re-entrant cavity tuned by several different ferrites indicate that the losses in the ferrite can be made negligible compared with the losses due to the surface resistivity of the copper cavity.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5753864
• Report Number(s): LA-9823-MS; ON: DE84000128
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430100* -- Particle Accelerators-- Design
Development
& Operation
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
ACCELERATORS
ALLOYS
BEAMS
CARBON ADDITIONS
CAVITY RESONATORS
CYCLIC ACCELERATORS
DATA
ELECTRIC FIELDS
ELECTRONIC EQUIPMENT
EQUIPMENT
EXPERIMENTAL DATA
FERRITE
INFORMATION
IRON ALLOYS
MAGNETIC FIELDS
NUCLEON BEAMS
NUMERICAL DATA
PARTICLE BEAMS
PROTON BEAMS
RESONANCE
RESONATORS
SYNCHROTRONS
TUNING