Plural three-wave resonances of space charge wave harmonics in transit section of klystron-type two-stream FEL with helical electron beam
| Autor: | Anastasia Serozhko, Iurii Volk, A. V. Lysenko, Oleksandr Rybalko |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Physics Klystron business.industry Electron 01 natural sciences Electromagnetic radiation 010305 fluids & plasmas law.invention Wavelength Two-stream instability Optics law Harmonics 0103 physical sciences Physics::Accelerator Physics Relativistic electron beam Atomic physics business Beam (structure) |
| Zdroj: | 2017 IEEE Microwaves, Radar and Remote Sensing Symposium (MRRS). |
| DOI: | 10.1109/mrrs.2017.8075053 |
| Popis: | We have carried out the research of plural three-wave resonances of space charge wave (SCW) harmonics in the transit section of the klystron type two-stream superheterodyne free-electron laser (TSFEL) with helical electron beam in cubic non-linear approximation. We have found out that two-stream instability critical frequency increases with increasing of two-stream electron beam input angle in the focusing longitudinal magnetic field. Due to this fact, the frequency domain in which plural three-wave parametric resonances of SCW harmonics take place increases. The two-stream instability growth rate also increases in helical electron beams with increasing of the beam input angle. Therefore, the saturation lengths in TSFELs with helical electron beams are shorter compared to TSFELs utilizing straight electron beams. We have shown that SCWs with broad frequency spectrum form in two-velocity helical relativistic electron beam due to plural three-wave parametric resonances. We have demonstrated that klystron-type TSFEL with helical electron beam can be used as a source of powerful multiharmonic electromagnetic waves in millimeter-infrared wavelength ranges. |
| Databáze: | OpenAIRE |
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