Rf superconductivity research and development at Los Alamos National Laboratory

Conference · Sun Jan 01 04:00:00 EST 1989

OSTI ID:5572589

Cooke, D W; Gray, E R; Houlton, R J; Lawrence, G P; McGill, J A; Meyer, E; Morris, C; Rusnak, B; Starke, T P

Los Alamos National Laboratory is engaged in two distinct areas of rf superconductivity research and development. One program is devoted to studying the rf properties of high-temperature superconductors (HTS) and assessing their potential for accelerator-cavity applications. Our best results to date have come from YBa{sub 2}Cu{sub 3}O{sub 7} films (0.8 {mu}m) electron-beam deposited onto LaGaO{sub 3} substrates. A typical surface resistance value is 0.2 {plus minus} 0.1 m{Omega} measured at 22 GHz and 4 K, which is only a factor of 2--4 higher than Nb. A second area of rf superconductivity R D at Los Alamos involves fabricating and testing conventional Nb superconducting rf cavities. Facilities are being constructed for polishing, cleaning,and testing both small (3-GHz) and large (805-MHz) Nb cavities. Much of our effort is being devoted to understanding the proper techniques for welding, cleaning, and handling Nb cavities, to ensure good high-field performance. Nb cavity applications are foreseen in upgrades to LAMPF, compact free-electron lasers, and high-current cw proton linacs. A single 402.5-MHz Nb cavity (in a beam cryostat) is presently being acquired from industry to provide a momentum compactor for the low-energy pion beam at LAMPF. 6 refs., 3 figs.

• Research Organization: Los Alamos National Lab., NM (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5572589
• Report Number(s): LA-UR-89-3331; CONF-8908145--4; ON: DE90002440
• Country of Publication: United States
• Language: English

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43 PARTICLE ACCELERATORS
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71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BEAMS
CAVITY RESONATORS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DESIGN
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON BEAMS
ELECTRONIC EQUIPMENT
EQUIPMENT
FREE ELECTRON LASERS
LASERS
LEPTON BEAMS
OXIDES
OXYGEN COMPOUNDS
PARTICLE BEAMS
PHYSICAL PROPERTIES
RESONATORS
RF SYSTEMS
SUPERCONDUCTING CAVITY RESONATORS
SUPERCONDUCTING DEVICES
SUPERCONDUCTIVITY
TRANSITION ELEMENT COMPOUNDS
USES
YTTRIUM COMPOUNDS