Summary of performance of superconducting radio-frequency cavities built from CBMM niobium ingots

Journal Article · Fri Dec 04 00:00:00 EST 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4935322· OSTI ID:22492689

Ciovati, Gianluigi; Dhakal, Pashupati; Kneisel, Peter

Several Nb ingots have been provided by CBMM to Jefferson Lab since 2004 as part of an R&D collaboration aimed at evaluating the performance of superconducting radio-frequency cavities built from ingots with different purity, as a results of different ingot production processes. Approximately 32 multi- and single-cell cavities with resonant frequency between ∼1.3-2.3 GHz were built, treated and tested at 2 K at Jefferson Lab between 2004 and 2014. The average peak surface field achieved in cavities made of RRR∼260 and RRR∼100-150 ingots was (119 ± 4) mT and (100 ± 8) mT, respectively. Higher quality factor values at 2.0 K have been measured in medium-purity, compared to higher purity material.

• OSTI ID: 22492689
• Journal Information: AIP Conference Proceedings, Vol. 1687, Issue 1; Conference: Ingot niobium summary workshop, Newport News, VA (United States), 4 Dec 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
CEBAF ACCELERATOR
COMPARATIVE EVALUATIONS
GHZ RANGE 01-100
IMPURITIES
NIOBIUM
PERFORMANCE
QUALITY FACTOR
RADIOWAVE RADIATION
RF SYSTEMS
SUPERCONDUCTING CAVITY RESONATORS