Title :
Design and initial testing of omniguide traveling-wave tube structures
Author :
Smirnova, Evgenya ; Carlsten, Bruce ; Earley, Lawrence ; Haynes, Brian
Author_Institution :
Los Alamos Nat. Lab., Los Alamos
Abstract :
We propose to use the photonic band gap (PBG) structures for the construction of a wide-band traveling- wave tube (TWT) at W-band. Interest in millimeter-waves has increased in recent years due to applications in communications, remote sensing, and basic research. The development of wide-band mm-wave TWT amplifiers is underway at Los Alamos National Laboratory. PBG TWT structures have great potential for very large bandwidth and linear dispersion. In addition, being cheap to fabricate, PBG structures enhance the commercial transferability of the W-band TWT technology. We employ an omniguide which is a one-dimensional version of a PBG structure representing a periodic system of concentric dielectric tubes as a slow-wave structure. A silica omniguide was designed to support the TM01-like mode with a phase velocity matching the one of the 120keV electron beam. The structure was fabricated, cold-tested and will be installed in our laboratory for the hot test.
Keywords :
electron accelerators; electron beams; linear accelerators; photonic band gap; Los Alamos National Laboratory; PBG structures; TWT amplifiers; W-band; dielectric tubes; electron beam; linear dispersion; omniguide traveling-wave tube structures; photonic band gap; remote sensing; silica omniguide structures; wide-band traveling- wave tube; Bandwidth; Broadband amplifiers; Dielectrics; Laboratories; Millimeter wave technology; Periodic structures; Photonic band gap; Remote sensing; Testing; Wideband;
Conference_Titel :
Particle Accelerator Conference, 2007. PAC. IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
978-1-4244-0916-7
DOI :
10.1109/PAC.2007.4441264
