Commissioning results of Nb3Sn cavity vapor diffusion deposition system at JLab
- Jefferson Lab., Newport News, VA (United States)
Nb3Sn 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 Nb3Sn 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 Nb3Sn coating the cavity had a Q0 of about 1010 and was limited by the high field Q-slope at Eacc ≅ 27 MV/m. Coated cavity exhibited the superconducting transition at about 17.9 K. The low-field quality factor was about 5∙109 at 4.3 K and 7∙109 at 2.0 K decreasing with field to about 1∙109 at Eacc ≅ 8 MV/m at both temperatures. The highest field was limited by the available RF power.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- DOE Contract Number:
- AC05-06OR23177
- OSTI ID:
- 1221900
- Report Number(s):
- JLAB-ACC-15-2048; DOE/OR/23177-3355; TRN: US1601455
- Resource Relation:
- Conference: IPAC 2015, Richmond, VA (United States), 3-8 May 2015
- Country of Publication:
- United States
- Language:
- English
Similar Records
A superconducting Nb/sub 3/Sn coated multicell accelerating cavity
New results of development on high efficiency high gradient superconducting rf cavities
Related Subjects
36 MATERIALS SCIENCE
CEBAF ACCELERATOR
NIOBIUM BASE ALLOYS
TIN ALLOYS
BINARY ALLOY SYSTEMS
SUPERCONDUCTING CAVITY RESONATORS
TRANSITION TEMPERATURE
GHZ RANGE 01-100
COMMISSIONING
PHYSICAL VAPOR DEPOSITION
DIFFUSION
QUALITY FACTOR
PERFORMANCE
ELECTRIC POTENTIAL
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE DEPENDENCE