Broad-frequency range of a 250 GHz medium-power gyrotron traveling-wave amplifier with a distributed-loss structure
A gyrotron traveling-wave amplifier (gyro-TWA) with a distributed-loss structure can achieve high gain over a broad bandwidth. In this study, a low-voltage, low-current subterahertz gyro-TWA with medium power (∼10 W) over a broad-frequency range (∼10 GHz) is designed. The excessive length of the cop...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2022-05-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0093711 |
| _version_ | 1817975632172154880 |
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| author | Yi Sheng Yeh Chien-Lun Hung Tsun-Hsu Chang |
| author_facet | Yi Sheng Yeh Chien-Lun Hung Tsun-Hsu Chang |
| author_sort | Yi Sheng Yeh |
| collection | DOAJ |
| description | A gyrotron traveling-wave amplifier (gyro-TWA) with a distributed-loss structure can achieve high gain over a broad bandwidth. In this study, a low-voltage, low-current subterahertz gyro-TWA with medium power (∼10 W) over a broad-frequency range (∼10 GHz) is designed. The excessive length of the copper section in this gyro-TWA leads to reflective oscillations and absolute instabilities. Reflective oscillations can be suppressed for a gyro-TWA with a high lossy-section resistivity and a short copper section. Absolute instabilities, conversely, can be suppressed for a gyro-TWA with a long lossy section and high lossy-section resistivity. The proposed gyro-TWA has a high lossy-section resistivity, a long lossy section, and a short copper section, which not only avoids mode competition but also achieves the desired characteristics of a high gain and broad-frequency range. For a 12 kV, 0.3 A electron beam, the frequency range of the 250 GHz 10 W level gyro-TWA with a distributed-loss structure, is ∼10 GHz when the input power is between 1 and 10 mW. |
| first_indexed | 2024-04-13T21:52:25Z |
| format | Article |
| id | doaj.art-ffb3e9e297e94d23b3fc40a1fabd1988 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-04-13T21:52:25Z |
| publishDate | 2022-05-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-ffb3e9e297e94d23b3fc40a1fabd19882022-12-22T02:28:23ZengAIP Publishing LLCAIP Advances2158-32262022-05-01125055017055017-810.1063/5.0093711Broad-frequency range of a 250 GHz medium-power gyrotron traveling-wave amplifier with a distributed-loss structureYi Sheng Yeh0Chien-Lun Hung1Tsun-Hsu Chang2Department of Electro-Optical Engineering, Southern Taiwan University of Science and Technology, Tainan 710, TaiwanDepartment of Communication Engineering, National Penghu University of Science and Technology, Penghu 880, TaiwanDepartment of Physics, National Tsing Hua University, Hsinchu 300, TaiwanA gyrotron traveling-wave amplifier (gyro-TWA) with a distributed-loss structure can achieve high gain over a broad bandwidth. In this study, a low-voltage, low-current subterahertz gyro-TWA with medium power (∼10 W) over a broad-frequency range (∼10 GHz) is designed. The excessive length of the copper section in this gyro-TWA leads to reflective oscillations and absolute instabilities. Reflective oscillations can be suppressed for a gyro-TWA with a high lossy-section resistivity and a short copper section. Absolute instabilities, conversely, can be suppressed for a gyro-TWA with a long lossy section and high lossy-section resistivity. The proposed gyro-TWA has a high lossy-section resistivity, a long lossy section, and a short copper section, which not only avoids mode competition but also achieves the desired characteristics of a high gain and broad-frequency range. For a 12 kV, 0.3 A electron beam, the frequency range of the 250 GHz 10 W level gyro-TWA with a distributed-loss structure, is ∼10 GHz when the input power is between 1 and 10 mW.http://dx.doi.org/10.1063/5.0093711 |
| spellingShingle | Yi Sheng Yeh Chien-Lun Hung Tsun-Hsu Chang Broad-frequency range of a 250 GHz medium-power gyrotron traveling-wave amplifier with a distributed-loss structure AIP Advances |
| title | Broad-frequency range of a 250 GHz medium-power gyrotron traveling-wave amplifier with a distributed-loss structure |
| title_full | Broad-frequency range of a 250 GHz medium-power gyrotron traveling-wave amplifier with a distributed-loss structure |
| title_fullStr | Broad-frequency range of a 250 GHz medium-power gyrotron traveling-wave amplifier with a distributed-loss structure |
| title_full_unstemmed | Broad-frequency range of a 250 GHz medium-power gyrotron traveling-wave amplifier with a distributed-loss structure |
| title_short | Broad-frequency range of a 250 GHz medium-power gyrotron traveling-wave amplifier with a distributed-loss structure |
| title_sort | broad frequency range of a 250 ghz medium power gyrotron traveling wave amplifier with a distributed loss structure |
| url | http://dx.doi.org/10.1063/5.0093711 |
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