The Prototype Fundamental Power Coupler For The Spallation Neutron Source Superconducting Cavities: Design And Initial Test Results

Conference · Sat Sep 01 00:00:00 EDT 2001

OSTI ID:786469

Wilson, K M; Campisi, I E; Daly, E F; Davis, G K; Drury, M; Henry, J E; Kneisel, P; Myneni, G; Powers, T; Schneider, W J; Stirbet, M ^[1]; Kang, Y ^[2]; Cummings, K; Hardek, T ^[3]

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1. TJNAF
2. Spallation Neutron Source
3. LANL

Each of the 805 MHz superconducting cavities of the Spallation Neutron Source (SNS) is powered via a coaxial Fundamental Power Coupler (FPC) with a 50 Omega impedance and a warm planar alumina window. The design is derived from the experience of other laboratories; in particular, a number of details are based on the coupler developed for the KEK B-Factory superconducting cavities. However, other design features have been modified to account for the fact that the SNS FPC will transfer a considerably lower average power than the KEK-B coupler. Four prototypes have been manufactured so far, and preliminary tests performed on two of them at Los Alamos National Laboratory (LANL). During these tests, peak powers of over 500 kW were transferred through the couplers in the test stand designed and built for this purpose. This paper gives details of the coupler design and of the results obtained from the RF tests on the test stand during the last few months. A more comprehensive set of tests is planned for the near future.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 786469
• Report Number(s): JLAB-ACT-01-16; DOE/ER/40150-1906; TRN: US0108902
• Resource Relation: Conference: 2001 SRF Workshop, Tsukuba (JP), 09/06/2001--09/11/2001; Other Information: PBD: 1 Sep 2001
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
SUPERCONDUCTING CAVITY RESONATORS
DESIGN
NEUTRON SOURCES
PEAK LOAD
SPALLATION
PERFORMANCE
POWER SUPPLIES