X-Band high power dry load for NLCTA

Author

Ko, K. ; Hoag, H. ; Lee, T. ; Tantawi, S.

Author_Institution

Linear Accel. Center, Stanford Univ., CA, USA

Volume

3

fYear

1995

fDate

1-5 May 1995

Firstpage

1726

Abstract

The specifications for the RF load to be used for absorbing the traveling wave at the end of an NLCTA accelerator section are that it be well matched over a broad band of frequencies (10% minimum), centered at 11.424 GHz, and capable of handling up to 63 MW peak and 3 kW average power. We present a ceramic (Aluminum Nitride+7% glassy carbon) load design which satisfies these requirements. It consists of a thin strip of dielectric material with a tapered surface placed inside each narrow wall of the waveguide. The complex dielectric constant of the ceramic at X-Band frequencies was first determined by measurement. Based on the measured values, a MAFIA model is used to evaluate the matching and the power dissipation. Results of the simulations indicate an optimal thickness of 0.045 in and overall length of 10 in

Keywords

accelerator RF systems; ceramics; colliding beam accelerators; dielectric-loaded waveguides; electron accelerators; linear colliders; waveguide components; 11.424 GHz; 3 kW; 63 MW; AlN-C; MAFIA model; NLCTA; NLCTA accelerator section; RF load; X-band frequencies; X-band high power dry load; ceramic load design; complex dielectric constant; dielectric material; matching; power dissipation; tapered surface; waveguide; Aluminum; Ceramics; Dielectric constant; Dielectric materials; Dielectric measurements; Frequency measurement; Power measurement; Radio frequency; Strips; Surface waves;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1995., Proceedings of the 1995

Conference_Location

Dallas, TX

Print_ISBN

0-7803-2934-1

Type

conf

DOI

10.1109/PAC.1995.505341

Filename

505341