Development and Characterization of Thin Film Superconducting Radio Frequency Surfaces for Accelerator Cavities
نویسنده
چکیده
Superconducting thin films have the potential to improve the performance of particle accelerators. Before these thin films can be implemented, a systematic study on structureproperty correlations is necessary. Here, we present the characterization of niobium thin films deposited onto both ceramic and metallic substrates. In particular, the film microstructure and superconducting properties are examined. Our findings show that the strain and crystallographic orientation of niobium films can adversely impact the transition between the superconducting and normal state as well as the lower critical field.
منابع مشابه
New Methods for Thin Film Deposition and First Investigations of the use of High Temperature Superconductors for Thin Film Cavities
Niobium thin film cavities have shown good and reliable performance for LEP and LHC, although there are limitations to overcome if this technique should be used for new accelerators such as the ILC. New coating techniques like High Power Impulse Magnetron Sputtering (HiPIMS) has shown very promising results and we will report on its possible improvements for Nb thin film cavity performance. Cur...
متن کاملMagnesium diboride coated bulk niobium: a new approach to higher acceleration gradient
Bulk niobium Superconducting Radio-Frequency cavities are a leading accelerator technology. Their performance is limited by the cavity loss and maximum acceleration gradient, which are negatively affected by vortex penetration into the superconductor when the peak magnetic field at the cavity wall surface exceeds the vortex penetration field (Hvp). It has been proposed that coating the inner wa...
متن کاملResults from Atomic Layer Deposition and Tunneling Spectroscopy for Superconducting Rf Cavities
Atomic Layer Deposition (ALD) is a process that synthesizes materials in successive monolayers, at rates up to 1 micron/hour. We have been using this technique at Argonne as a possible way to improve superconducting radio frequency (SCRF) cavities performances. Initial experiments using tunneling spectroscopy and ALD have led to a new model for dissipation mechanisms occurring at the surface an...
متن کاملDevelopment of an Optimized Quadrupole Resonator at HZB
Current superconducting cavities are generally made of solid Niobium. A possibility to reduce cost as well as increase the quality factor and/or accelerating fields is to use thin film coated cavities. Apart from Niobium thin films, other substances such as Magnesium diboride, Niobium nitride and Niobium-tin are promising candidates. Measuring the RF-properties of superconducting thin films, sp...
متن کاملSLAC-PUB-1134 WC) October 1972 CURRENT STATUS OF SUPERCONDUCTING ACCELERATOR TECHNOLOGY*
Superconducting accelerator technology is celebrating an anniversary this year. Ten years ago, in 1962, Q’s in the range 166-169 and peak rf mangetic fields on the order of 100 G were obtained in measurements on leadplated, S-band cavities at Stanford. While the theoretical possibility of building superconducting linear accelerators had been considered previously, these results marked, if not t...
متن کامل