PAC2013 - List of Authors (Robak, S.)

Paper	Title	Page
MOPAC17	RF-Components Embedded with Photonic-Band-Gap (PBG) and Fishnet-Metamaterial Structures for High Frequency Accelerator Application	102
	Y.-M. Shin Fermilab, Batavia, USA D. Boyden, S. Robak Northern Illinois University, DeKalb, Illinois, USA
	For development of high gradient RF-accelerators, RF waveguides and cavities have been designed with Photonic Band Gap (PBG) and fishnet-metamaterial structures. The designed structures are comprised of a periodically corrugated channel sandwiched between two photonic crystal slabs with alternating high to low dielectric constants and a multi-cell cavity-resonator designed with fishnet-metamaterial apertures. The structural designs are intended to only allow an operating-mode or -band within a narrow frequency range to propagate. The simulation analysis shows that trapped non-PBG modes are effectively suppressed down to ~ - 14.3 dB/cm, while PBG modes propagated with ~ 2 dB of insertion loss, corresponding to ~1.14 dB/cm attenuation. The preliminary modeling analysis on the fishnet-embedded cavity shows noticeable improvement of Q-factor and field gradient of the operating mode (TM010) compared to those of PBG-cavities. It is planned to test the fabricated Ka-band PBG-waveguide and S-band fishnet cavity structures with a microwave test bench/8510C Network Analyzer and 5.5 MW S-band klystron respectively.

Paper

Title

Page

RF-Components Embedded with Photonic-Band-Gap (PBG) and Fishnet-Metamaterial Structures for High Frequency Accelerator Application

102

Y.-M. Shin
Fermilab, Batavia, USA
D. Boyden, S. Robak
Northern Illinois University, DeKalb, Illinois, USA

For development of high gradient RF-accelerators, RF waveguides and cavities have been designed with Photonic Band Gap (PBG) and fishnet-metamaterial structures. The designed structures are comprised of a periodically corrugated channel sandwiched between two photonic crystal slabs with alternating high to low dielectric constants and a multi-cell cavity-resonator designed with fishnet-metamaterial apertures. The structural designs are intended to only allow an operating-mode or -band within a narrow frequency range to propagate. The simulation analysis shows that trapped non-PBG modes are effectively suppressed down to ~ - 14.3 dB/cm, while PBG modes propagated with ~ 2 dB of insertion loss, corresponding to ~1.14 dB/cm attenuation. The preliminary modeling analysis on the fishnet-embedded cavity shows noticeable improvement of Q-factor and field gradient of the operating mode (TM010) compared to those of PBG-cavities. It is planned to test the fabricated Ka-band PBG-waveguide and S-band fishnet cavity structures with a microwave test bench/8510C Network Analyzer and 5.5 MW S-band klystron respectively.