Design and high power processing of RFQ input power couplers

Author

Kang, Y.W. ; Vassioutchenko, A. ; Aleksandrov, A.V. ; Anderson, D. ; Champion, M.S. ; Crofford, M. ; Gibson, P. ; Hardek, T. ; Ladd, P. ; McCarthy, M.P. ; Stout, D.

Author_Institution

Oak Ridge Nat. Lab., Oak Ridge

fYear

2007

fDate

25-29 June 2007

Firstpage

2505

Lastpage

2507

Abstract

A RF power coupling system has been developed for future upgrade of input coupling of the RFQ in the SNS linac. The design employs two coaxial loop couplers for 402.5 MHz operation. Each loop is fed through a coaxial ceramic window that is connected to an output of a magic-T waveguide hybrid through a coaxial to waveguide transition. The coaxial loop couplers are designed, manufactured, and high power processed. Two couplers will be used in parallel to power the accelerating structure with up to total 800 kW peak power at 6% duty cycle. RF and mechanical properties of the couplers are discussed. Result of high power RF conditioning that is performed in the RF test facility of the SNS is presented.

Keywords

UHF couplers; accelerator RF systems; coaxial waveguides; linear accelerators; waveguide transitions; RFQ input power couplers; SNS linac; ceramic window; coaxial loop couplers; frequency 402.5 MHz; high power RF conditioning; magic-T waveguide hybrid; mechanical properties; waveguide transition; Acceleration; Ceramics; Coaxial components; Couplers; Linear particle accelerator; Manufacturing processes; Mechanical factors; Performance evaluation; Radio frequency; Waveguide transitions;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2007. PAC. IEEE

Conference_Location

Albuquerque, NM

Print_ISBN

978-1-4244-0916-7

Type

conf

DOI

10.1109/PAC.2007.4441298

Filename

4441298