Publications

Basilio, Lorena I.; Brener, Igal B.; Burckel, David B.; Shaner, Eric A.; Wendt, J.R.; Luk, Ting S.; Ellis, A.R.; Bender, Daniel A.; Clem, Paul G.; Rasberry, Roger D.; Langston, William L.; Ihlefeld, Jon I.; Dirk, Shawn M.; Warne, Larry K.; Peters, D.W.; El-Kady, I.; Reinke, Charles M.; Loui, Hung L.; Williams, Jeffery T.; Sinclair, Michael B.; McCormick, Frederick B.

Abstract not provided.

Digest of Technical Papers-IEEE International Pulsed Power Conference

VanDevender, J.P.; Langston, William L.; Pasik, Michael F.; Coats, Rebecca S.; Pointon, Timothy D.; Seidel, David B.; Jennings, C.A.; McKee, G.R.; Schneider, Larry X.

We have developed a new type of convolute called the Clam Shell MITL (CSMITL) to couple multi-level accelerators to a common load. The CSMITL has magnetic nulls only at large radius where the cathode electric field is kept below the threshold for emission, has only a simply connected magnetic topology to avoid plasma motion along magnetic field lines into highly stressed gaps, and has electron injectors that ensure efficient electron flow even in the limiting case of self-limited MITLs. We report the first experimental results on a CSMITL, which convolutes two disk feeds on the Saturn accelerator into a single disk feed. Experiments with a high impedance electron beam load operating at twice the self-limited impedance of the CSMITL confirm key design features and demonstrate robust operation. © 2011 IEEE.

Proceedings - 2011 International Conference on Electromagnetics in Advanced Applications, ICEAA'11

Johnson, William Arthur.; Langston, William L.; Basilio, Lorena I.; Warne, Larry K.

A first principles calculation for the transfer capacitance of a Beldon cable is carried out by the use of filamentary constant, dipole, quadrupole, and octopole unknown charges placed at the center of each braid wire. Results are compared with full electrostatic simulations and a phenomenological model. © 2011 IEEE.

IEEE Antennas and Propagation Society, AP-S International Symposium (Digest)

Basilio, L.I.; Warne, Larry K.; Langston, William L.; Johnson, William Arthur.; Sinclair, M.B.

In this paper a simple effective-media analysis (including higher-order multipoles) is used to design a single-resonator, negative-index design based on a metal-core, dielectric-shell (MCDS) unit cell. In addition to comparing the performance of the MCDS design to other core-shell negative-index designs, performance trade-offs resulting from the relative positioning of the electric and magnetic modal resonances in the MCDS design are also discussed. © 2011 IEEE.

PIER B

Warne, Larry K.; Johnson, William Arthur.; Basilio, Lorena I.; Langston, William L.; Sinclair, Michael B.

Abstract not provided.

Johnson, William Arthur.; Langston, William L.; Basilio, Lorena I.; Warne, Larry K.

Abstract not provided.

Johnson, William Arthur.; Langston, William L.; Basilio, Lorena I.

Abstract not provided.

IEEE Transactions on Antennas and Propagation

Warne, Larry K.; Basilio, Lorena I.; Langston, William L.; Johnson, William Arthur.; Sinclair, Michael B.

Abstract not provided.

IEEE Antennas and Wireless Propagation Letters

Langston, William L.; Warne, Larry K.; Johnson, William Arthur.

Abstract not provided.

IEEE Antennas and Wireless Propagation Letters

Warne, Larry K.; Langston, William L.; Johnson, William Arthur.; Sinclair, Michael B.

Abstract not provided.

Johnson, William Arthur.; Warne, Larry K.; Basilio, Lorena I.; Langston, William L.

Abstract not provided.

Langston, William L.; Pasik, Michael F.; Coats, Rebecca S.; Pointon, Timothy D.; Seidel, David B.; McKee, George R.; Schneider, Larry X.

Abstract not provided.

Johnson, William Arthur.; Warne, Larry K.; Basilio, Lorena I.; Langston, William L.; Sinclair, Michael B.

Abstract not provided.

Johnson, William Arthur.; Basilio, Lorena I.; Langston, William L.

Abstract not provided.

Langston, William L.; Basilio, Lorena I.; Warne, Larry K.

Abstract not provided.

Proceedings - 2010 12th International Conference on Electromagnetics in Advanced Applications, ICEAA'10

Johnson, W.A.; Paulotto, S.; Jackson, D.R.; Wilton, D.R.; Langston, William L.; Basilio, Lorena I.; Baccarelli, P.; Valerio, G.; Celepcikay, F.T.

This paper presents a mixed-potential integral-equation formulation for analyzing 1-D periodic leaky-wave antennas in layered media. The structures are periodic in one dimension and finite in the other two dimensions. The unit cell consists of an arbitrary-shaped metallic/dielectric structure. The formulation has been implemented in the EIGER™ code in order to obtain the real and complex propagation wavenumbers of the bound and leaky modes of such structures. Validation results presented here include a 1-D periodic planar leaky-wave antenna and a fully 3-D waveguide test case. ©2010 IEEE.

Optics Express

Sinclair, Michael B.; Brener, Igal B.; Ten Eyck, Gregory A.; Basilio, Lorena I.; Langston, William L.

Abstract not provided.

Physical Review Special Topics in Accelerators and Beams

Langston, William L.; Pasik, Michael F.; Coats, Rebecca S.; Pointon, Timothy D.; Seidel, David B.; McKee, George R.; Schneider, Larry X.

Abstract not provided.

Langston, William L.; Basilio, Lorena I.

This paper presents a mixed-potential integral-equation formulation for analyzing 1-D periodic leaky-wave antennas in layered media. The structures are periodic in one dimension and finite in the other two dimensions. The unit cell consists of an arbitrary-shaped metallic/dielectric structure. The formulation has been implemented in the EIGER{trademark} code in order to obtain the real and complex propagation wavenumbers of the bound and leaky modes of such structures. Validation results presented here include a 1-D periodic planar leaky-wave antenna and a fully 3-D waveguide test case.

Langston, William L.; Warne, Larry K.; Johnson, William Arthur.; Sinclair, Michael B.; Basilio, Lorena I.

Abstract not provided.

Warne, Larry K.; Johnson, William Arthur.; Langston, William L.; Sinclair, Michael B.

This paper introduces an effective-media toolset that can be used for the design of metamaterial structures based on metallic components such as split-ring resonators and dipoles, as well as dielectric spherical resonators. For demonstration purposes the toolset will be used to generate infrared metamaterial designs, and the predicted performances will be verified with full-wave numerical simulations.

IEEE Antennas and Wireless Propagation Letters

Basilio, Lorena I.; Warne, Larry K.; Johnson, William Arthur.; Langston, William L.; Sinclair, Michael B.

Abstract not provided.

Journal of Vacuum Science and Technology B

Smolev, Svyatoslav; Ku, Zahyun; Brueck, S.R.J.; Brener, Igal B.; Sinclair, Michael B.; Ten Eyck, Gregory A.; Langston, William L.; Basilio, Lorena I.

The authors experimentally demonstrate a resonant hybridization between the magnetic dipole structural resonance in the permeability of a fishnet metamaterial and an electric dipole material resonance in the permittivity of the dielectric spacer layer. The hybrid resonances in the permeability and the negative index response exhibit an anticrossing behavior. A simple analytic model and numerical simulations using a rigorous coupled-wave analysis are in excellent qualitative agreement with the experiment. © 2010 American Vacuum Society.

Sinclair, Michael B.; Ten Eyck, Gregory A.; Langston, William L.; Basilio, Lorena I.

Abstract not provided.

Basilio, Lorena I.; Johnson, William Arthur.; Warne, Larry K.; Langston, William L.; Peters, D.W.; Sinclair, Michael B.

Abstract not provided.