Thermal analysis of the APT power coupler and similarities to superconducting magnet current leads

Conference · Thu Dec 31 04:00:00 EST 1998

OSTI ID:350911

Waynert, J A; Daney, D E; Prenger, F C

A detailed thermal analysis has been performed of the 210 kW, 700 MHz RF power coupler (PC) which transfers microwave energy from high power klystrons to the superconducting (SC) resonant cavities for the acceleration of protons. The work is part of the design for Accelerator Production of Tritium funded by the US Department of Energy. The PC is a co-axial design with the RF power transmitted in the annular region between two concentric cylinders. The PC provides a thermal connection from room temperature to superconducting niobium operating at 2.15 K. Heat transfer mechanisms considered are conduction, infra-red radiation, RF joule heating in normal and superconducting materials, and, forced and natural convection cooling. The objective of the thermal analysis is to minimize the required refrigeration power subject to manufacturability and reliability concerns. The problem is reminiscent of the optimization of superconducting magnet leads. The similarities and differences in the results between SC leads and PCs are discussed as well as the critical parameters in the PC optimization.

• Research Organization: Los Alamos National Lab., NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 350911
• Report Number(s): LA-UR--98-4065; CONF-9809130--; ON: DE99002592
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
CONDUCTOR DEVICES
DESIGN
HEAT TRANSFER
LINEAR ACCELERATORS
MICROWAVE POWER TRANSMISSION
RF SYSTEMS
SUPERCONDUCTING CAVITY RESONATORS
THERMAL ANALYSIS