COMPUTER SIMULATIONS OF WAVEGUIDE WINDOW AND COUPLER IRIS FOR PRECISION MATCHING

Conference · Sat Jan 01 00:00:00 EST 2011

OSTI ID:1042809

Lee, Sung-Woo ^[1]; Kang, Yoon W ^[1]; Shin, Ki ^[1]; Vassioutchenko, Alexandre V ^[1]

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1. ORNL

A tapered ridge waveguide iris input coupler and a waveguide ceramic disk windows are used on each of six drift tube linac (DTL) cavities in the Spallation Neutron Source (SNS). The coupler design employs rapidly tapered double ridge waveguide to reduce the cross section down to a smaller low impedance transmission line section that can couple to the DTL tank easily. The impedance matching is done by adjusting the dimensions of the thin slit aperture between the ridges that is the coupling element responsible for the power delivery to the cavity. Since the coupling is sensitive to the dimensional changes of the aperture, it requires careful tuning for precise matching. Accurate RF simulation using latest 3-D EM code is desirable to help the tuning for maintenance and spare manufacturing. Simulations are done for the complete system with the ceramic window and the coupling iris on the cavity to see mutual interaction between the components as a whole.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1042809
• Resource Relation: Conference: PAC11 (Particle Accelerator Conference 2011), New York City, NY, USA, 20110328, 20110401
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
24 POWER TRANSMISSION AND DISTRIBUTION
ACCELERATORS
APERTURES
CAVITIES
CERAMICS
COMPUTERIZED SIMULATION
CROSS SECTIONS
DESIGN
DIMENSIONS
DRIFT TUBES
IMPEDANCE
LINEAR ACCELERATORS
MAINTENANCE
MANUFACTURING
NEUTRON SOURCES
POWER TRANSMISSION LINES
SPALLATION
TANKS
TUNING
WAVEGUIDES
DTL
RF
SNS