| Autor: |
E. G. Zaidman, H. P. Freund |
| Rok vydání: |
1997 |
| Předmět: |
|
| Zdroj: |
AIP Conference Proceedings. |
| ISSN: |
0094-243X |
| DOI: |
10.1063/1.52335 |
| Popis: |
A time-dependent nonlinear analysis of a helix traveling wave tube is presented for a beam propagating through a sheath helix surrounded by a conducting wall. The effects of dielectric- and vane-loading are included as is the tapering of the helix pitch. Dielectric-loading is described when the gap between the helix and the wall is uniformly filled. Vane-loading describes the insertion of vanes running the length of the helix. The field is represented as a superposition of azimuthally symmetric waves in vacuo. An overall explicit sinusoidal variation is assumed, and the polarization and radial variation of each wave is determined by the boundary conditions in a vacuum circuit. The propagation of each wave as well as the interaction with the beam is included by allowing the amplitudes of the waves to vary in z and t. A dynamical equation is derived analogously to Poynting’s equation, and solved in conjunction with the 3-D Lorentz force equations. The model is compared with linear theory. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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