|Publisher DOI:||10.1109/TED.2018.2810501||Title:||Magnetic Field Tapering Approaches for Backward-Wave Oscillation Suppression in Helix Traveling-Wave Tubes||Language:||English (United States)||Authors:||Hagermann, Moritz
|Issue Date:||Jun-2018||Source:||IEEE Transactions on Electron Devices 6 (65): 2236-2242 (2018-06)||Journal or Series Name:||IEEE transactions on electron devices||Abstract (english):||Two magnetic field tapering concepts for the suppression of backward-wave oscillations in helix traveling-wave tubes (TWTs) are presented. Therefore, the beam-wave interaction in a homogeneous helix section is modified. Increasing the field strength reduces the beam diameter and consequently the beam-wave coupling, while an additional offset in the focusing field alters the synchronism between both. The theoretical background is introduced and results from a 1-D small-signal and a 3-D particle-in-cell code are presented and compared. Furthermore, a concept to apply the suppression techniques to a complete TWT is presented, and the influence on the amplifier output characteristics is analyzed.||URI:||http://hdl.handle.net/11420/2461||ISSN:||0018-9383||Institute:||Hochfrequenztechnik E-3||Type:||(wissenschaftlicher) Artikel|
|Appears in Collections:||Publications without fulltext|
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