PAC2013 - List of Authors (Duan, Z.)

Paper	Title	Page
WEPBA13	Retrieval of Effective Parameters of Metamaterials for Accelerator and Vacuum Electron Device Applications	910
	Z. Duan, J.S. Hummelt, M.A. Shapiro, R.J. Temkin MIT/PSFC, Cambridge, Massachusetts, USA
	Funding: This work was supported by DOE, High Energy Physics (Grant No. DE-SC0010075) and the Fundamental Research Funds for the Central Universities (Grant No. ZYGX2010X010). Metamaterials (MTMs) are artificial electromagnetic materials comprised of sub-wavelength elements. A Double-Negative Metamaterial (DNM) has both negative permittivity and negative permeability and can be described by an effective medium theory. We investigate MTMs at microwave, millimeter wave, and THz frequencies for application as accelerator structures, as interaction circuits of high power microwave vacuum electron devices, and as beam diagnostics tools. In this paper, we propose a new method to retrieve the effective material parameters, i.e., effective permittivity and permeability. We first get the effective permeability analytically and then the effective permittivity numerically according to the dispersion characteristics. This method is different from that for the slab DNMs which is based on the scattering parameters. The approach presented here offers a solid foundation for metamaterial-based accelerator and vacuum electron device applications.

Paper

Title

Page

Retrieval of Effective Parameters of Metamaterials for Accelerator and Vacuum Electron Device Applications

910

Z. Duan, J.S. Hummelt, M.A. Shapiro, R.J. Temkin
MIT/PSFC, Cambridge, Massachusetts, USA

Funding: This work was supported by DOE, High Energy Physics (Grant No. DE-SC0010075) and the Fundamental Research Funds for the Central Universities (Grant No. ZYGX2010X010).
Metamaterials (MTMs) are artificial electromagnetic materials comprised of sub-wavelength elements. A Double-Negative Metamaterial (DNM) has both negative permittivity and negative permeability and can be described by an effective medium theory. We investigate MTMs at microwave, millimeter wave, and THz frequencies for application as accelerator structures, as interaction circuits of high power microwave vacuum electron devices, and as beam diagnostics tools. In this paper, we propose a new method to retrieve the effective material parameters, i.e., effective permittivity and permeability. We first get the effective permeability analytically and then the effective permittivity numerically according to the dispersion characteristics. This method is different from that for the slab DNMs which is based on the scattering parameters. The approach presented here offers a solid foundation for metamaterial-based accelerator and vacuum electron device applications.