Effects of Magnetic Focusing on Power and Stability of VE Amplifiers
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arXiv
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866917871222784000 |
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| author | Jabotinski, Vadim J. Vlasov, Alexander N. Cooke, Simon J. |
| author_facet | Jabotinski, Vadim J. Vlasov, Alexander N. Cooke, Simon J. |
| contents | Theory and modeling of new discovered effects of the oscillating e-beam boundary formed in a magnetic focusing channel on the stability, gain, and power of VE amplifiers are presented. The RF structure and e-beam circuit parameters are computed for different beam envelope radii and oscillation amplitudes and then the self-excitation thresholds are obtained from the Determinant equations. A new solution of the beam envelope equation not limited by the small-amplitude oscillations is derived and used to determine the magnetic focusing conditions providing various beam envelope radii and oscillation amplitudes. It is shown for the example Ka-band serpentine structure that the optimum radius as well as axial position of the oscillating beam envelope allow achieving significantly greater gain and power of RF amplifiers. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_13112 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Effects of Magnetic Focusing on Power and Stability of VE Amplifiers Jabotinski, Vadim J. Vlasov, Alexander N. Cooke, Simon J. Accelerator Physics Applied Physics Computational Physics Plasma Physics Theory and modeling of new discovered effects of the oscillating e-beam boundary formed in a magnetic focusing channel on the stability, gain, and power of VE amplifiers are presented. The RF structure and e-beam circuit parameters are computed for different beam envelope radii and oscillation amplitudes and then the self-excitation thresholds are obtained from the Determinant equations. A new solution of the beam envelope equation not limited by the small-amplitude oscillations is derived and used to determine the magnetic focusing conditions providing various beam envelope radii and oscillation amplitudes. It is shown for the example Ka-band serpentine structure that the optimum radius as well as axial position of the oscillating beam envelope allow achieving significantly greater gain and power of RF amplifiers. |
| title | Effects of Magnetic Focusing on Power and Stability of VE Amplifiers |
| topic | Accelerator Physics Applied Physics Computational Physics Plasma Physics |
| url | https://arxiv.org/abs/2412.13112 |