A sapphire loaded TE011 cavity for surface impedance measurements: design, construction, and commissioning status

Conference · Sun Jul 10 00:00:00 EDT 2005

OSTI ID:859451

Phillips, L; Davis, G K; Delayen, J R; Ozelis, J P; Plawski, T; Wang, H; Wu, G

In order to measure the superconducting surface properties of niobium that are of interest to SRF applications, a facility which utilizes a Nb cavity operating in the TE011 mode at 7.65 GHz which provides a well-defined RF field on a disk shaped sample has been designed and fabricated. The RF losses due to the sample's surface impedance are determined by using a calorimetric technique. The system has the capability to measure such properties as Rs,(T), and penetration depth, which can then be correlated with surface properties and preparation processes. The design, fabrication, and results from initial commissioning operations will be discussed, along with the near term sample evaluation program.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE - Office of Energy Research (ER)
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 859451
• Report Number(s): JLAB-ACC-05-447; DOE/ER/40150-3629; TRN: US0504756
• Resource Relation: Conference: 12th SRF Workshop, Cornell University, July 10, 2005
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
SUPERCONDUCTING CAVITY RESONATORS
COMMISSIONING
CONSTRUCTION
DESIGN
IMPEDANCE
SAPPHIRE
SURFACE PROPERTIES
NIOBIUM