Research & Development on Superconducting Niobium Materials via Magnetic Measurements

Conference · Tue Mar 01 00:00:00 EST 2011 · AIP Conf.Proc.

DOI:https://doi.org/10.1063/1.3579224· OSTI ID:1021420

S. B. Roy, V. C. Sahni, and G. R. Myneni

We present a study of superconducting properties of both large grain (1 mm average grain size) and small grain (50 micron average grain size) Niobium materials containing varying amounts of Tantalum impurities that have been used in the fabrication of high accelerating gradient superconducting radio frequency cavities. We found that a buffered chemical polishing of these Niobium samples causes a distinct reduction in the superconducting parameters like TC, wt- ppm to 1300 wt-ppm. Implications of these results on the performance of niobium superconducting radio frequency cavities are discussed, especially the anomalous high field RF losses that have been reported in the literature.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1021420
• Report Number(s): JLAB-ACC-10-1244; DOE/OR/23177-1676; TRN: US201117%%86
• Journal Information: AIP Conf.Proc., Vol. 1352; Conference: 1st International Symposium, SSTIN10, Newport News, USA, September 22-24, 2010
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CAVITIES
CHEMICAL POLISHING
FABRICATION
GRAIN SIZE
IMPURITIES
NIOBIUM
PERFORMANCE
TANTALUM