A design study of a permanent magnet quadrupole focused helix traveling-wave tube

Author

Abe, David K. ; Kishek, Rami ; Petillo, John J. ; Chernin, David P. ; Levush, Baruch

Author_Institution

Vacuum Electron. Branch, U.S. Naval Res. Lab., Washington, DC, USA

fYear

2009

fDate

28-30 April 2009

Firstpage

554

Lastpage

555

Abstract

Periodic permanent magnet quadrupole (PMQ) lattices have the potential to provide the strong focusing required to successfully transport higher current beams than conventional PPM lattices. We present a design example of a PMQ lattice optimized for a 16 kV, 0.81 A beam along with particle simulations using the electron transport code, MICHELLE 3D. We also present analyses of the interaction of the elliptical beam formed in the PMQ lattice with a helical traveling-wave circuit to provide insights into the advantages afforded by PMQ focusing.

Keywords

permanent magnets; travelling wave tubes; MICHELLE 3D; PMQ focusing; PMQ lattice; current 0.81 A; electron transport code; elliptical beam; helical traveling-wave circuit; particle simulations; periodic permanent magnet quadrupole lattices; permanent magnet quadrupole focused helix traveling-wave tube; voltage 16 kV; Circuit simulation; Design optimization; Electron beams; Lattices; Magnetic analysis; Magnetic confinement; Permanent magnets; Power amplifiers; Stability; Voltage; Permanent magnet quadrupole focusing; TWT; traveling-wave tube;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference, 2009. IVEC '09. IEEE International

Conference_Location

Rome

Print_ISBN

978-1-4244-3500-5

Electronic_ISBN

978-1-4244-3501-2

Type

conf

DOI

10.1109/IVELEC.2009.5193465

Filename

5193465