Title :
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
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;
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
DOI :
10.1109/IVELEC.2009.5193465
