Title :
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
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;
Conference_Titel :
Particle Accelerator Conference, 1995., Proceedings of the 1995
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-2934-1
DOI :
10.1109/PAC.1995.505341
