Commissioning results of Nb<sub>3</sub>Sn cavity vapor diffusion deposition system at JLab [electronic resource]
- Washington, D.C. : United States. Dept. of Energy. Office of Nuclear Physics ; Oak Ridge, Tenn. : distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2015
- Physical description
- 1 online resource (3 p.) : digital, PDF file.
- Thomas Jefferson National Accelerator Facility (U.S.). Researcher
- United States. Dept. of Energy. Office of Nuclear Physics. Sponsor
- United States. Dept. of Energy. Office of Scientific and Technical Information. Distributor
- Grigory Eremeev Author
- William A. Clemens Author
- Kurt M. Macha Author
- HyeKyoung Park Author
- R. Williams Author
- Nb<sub>3</sub>Sn as a BCS superconductor with a superconducting critical temperature higher than that of niobium offers potential benefit for SRF cavities via a lower-than-niobium surface resistance at the same temperature and frequency. A Nb<sub>3</sub>Sn vapor diffusion deposition system designed for coating of 1.5 and 1.3 GHz single-cell cavities was built and commissioned at JLab. As the part of the commissioning, RF performance at 2.0 K of a single-cell 1.5 GHz CEBAF-shaped cavity was measured before and after coating in the system. Before Nb<sub>3</sub>Sn coating the cavity had a Q<sub>0</sub> of about 10<sup>10</sup> and was limited by the high field Q-slope at E<sub>acc</sub> ≅ 27 MV/m. Coated cavity exhibited the superconducting transition at about 17.9 K. The low-field quality factor was about 5∙10<sup>9</sup> at 4.3 K and 7∙10<sup>9</sup> at 2.0 K decreasing with field to about 1∙10<sup>9</sup> at E<sub>acc</sub> ≅ 8 MV/m at both temperatures. The highest field was limited by the available RF power.
- Cebaf Accelerator.
- Niobium Base Alloys.
- Tin Alloys.
- Binary Alloy Systems.
- Superconducting Cavity Resonators.
- Transition Temperature.
- Ghz Range 01-100.
- Physical Vapor Deposition.
- Quality Factor.
- Electric Potential.
- Temperature Range 0000-0013 K.
- Temperature Dependence.
- Particle Accelerators.
- Materials Science.
- Publication date
- Published through SciTech Connect.
- " doe/or/23177--3355"
- IPAC 2015, Richmond, VA (United States), 3-8 May 2015.
- Grigory Eremeev; William A. Clemens; Kurt M. Macha; HyeKyoung Park; R. Williams.
- Funding Information