Accession Number : ADA321851

Title :   Low Voltage, Millimeter-Wave Cerenkov Amplifiers.

Descriptive Note : Final rept. 30 Sep 91-29 Sep 96,

Corporate Author : WISCONSIN UNIV-MADISON DEPT OF ELECTRICAL AND COMPUTER ENGINEERING

Personal Author(s) : Booske, John H. ; Scharer, John E.

PDF Url : ADA321851

Report Date : NOV 1996

Pagination or Media Count : 12

Abstract : Research results establish that novel periodic magnetic focusing optics offer the opportunity to propagate much higher beam currents than previously achievable in slow wave vacuum microwave devices. Several new sources for sheet electron beams have been designed and numerically analyzed, including 2 different thermionic electron gun designs as well as one approach that uses magnetic quadrupole optics for converting a conventional round beam into a large aspect ratio ellipical (i.e., sheet) beam. Round beam focusing by short period PPQM arrays was also studied. We have developed new understanding of the relatively unexplored area of hybrid electromagnetic waveguide mode dynamics. The dispersive properties of a slow wave grating system have been measured and compared with the theoretical model.

Descriptors :   *MILLIMETER WAVE EQUIPMENT, *ELECTRON OPTICS, MATHEMATICAL MODELS, QUADRUPOLE MOMENT, ELECTRON BEAMS, GRATINGS(SPECTRA), ASPECT RATIO, CERENKOV RADIATION, SLOW WAVE CIRCUITS, ELECTRON GUNS, PERIODIC FUNCTIONS, THERMIONIC EMISSION.

Subject Categories : Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE