An electron-optical system based on superconducting coil for a 670 GHz traveling wave tube
This study proposes a novel electron-optical system (EOS) based on superconducting coils (SCs) for a 670 GHz traveling wave tube (TWT), demonstrating significant improvements in electron beam focusing capabilities. By utilizing magnetic field intensities significantly surpassing that of a permanent...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2025-03-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0257589 |
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| Summary: | This study proposes a novel electron-optical system (EOS) based on superconducting coils (SCs) for a 670 GHz traveling wave tube (TWT), demonstrating significant improvements in electron beam focusing capabilities. By utilizing magnetic field intensities significantly surpassing that of a permanent magnet, the electron beam is effectively compressed with the aim of achieving stable transmission of a current exceeding 30 mA through a channel with a diameter of 0.1 mm and a length of 100 mm. We developed and fabricated an electron gun operating at 23 kV with a current of 33 mA, aimed at assessing the feasibility of the SC EOS. In transmission experiments, we successfully obtained a collection electrode current approaching 24 mA, achieving an electron beam transmission rate of 76%. Furthermore, to assess the performance of the EOS, a preliminary design of a folded waveguide slow-wave structure for a 670 GHz TWT was developed. In the simulation analysis, an output power peak of 4.7 W at a frequency of 665 GHz was attained with an electron beam current of 30 mA. |
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| ISSN: | 2158-3226 |