Boosting the electron beam transmittance of field emission cathode using a self-charging gate
Abstract The gate-type carbon nanotubes cathodes exhibit advantages in long-term stable emission owing to the uniformity of electrical field on the carbon nanotubes, but the gate inevitably reduces the transmittance of electron beam, posing challenges for system stabilities. In this work, we introdu...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2024-01-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-024-45142-0 |
| _version_ | 1797276392376762368 |
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| author | Dongyang Xiao Huanhuan Du Leimeng Sun Xiaochen Suo Yurong Wang Yili Zhang Shaolin Zhang Shuangyang Kuang Fangjing Hu Liangcheng Tu Daren Yu Peiyi Song |
| author_facet | Dongyang Xiao Huanhuan Du Leimeng Sun Xiaochen Suo Yurong Wang Yili Zhang Shaolin Zhang Shuangyang Kuang Fangjing Hu Liangcheng Tu Daren Yu Peiyi Song |
| author_sort | Dongyang Xiao |
| collection | DOAJ |
| description | Abstract The gate-type carbon nanotubes cathodes exhibit advantages in long-term stable emission owing to the uniformity of electrical field on the carbon nanotubes, but the gate inevitably reduces the transmittance of electron beam, posing challenges for system stabilities. In this work, we introduce electron beam focusing technique using the self-charging SiNx/Au/Si gate. The potential of SiNx is measured to be approximately −60 V quickly after the cathode turning on, the negative potential can be maintained as the emission goes on. The charged surface generates rebounding electrostatic forces on the following electrons, significantly focusing the electron beam on the center of gate hole and allowing them to pass through gate with minimal interceptions. An average transmittance of 96.17% is observed during 550 hours prototype test, the transmittance above 95% is recorded for the cathode current from 2.14 μA to 3.25 mA with the current density up to 17.54 mA cm−2. |
| first_indexed | 2024-03-07T15:27:39Z |
| format | Article |
| id | doaj.art-47d8a065a0344de09b3f0b13b0f5a6f1 |
| institution | Directory Open Access Journal |
| issn | 2041-1723 |
| language | English |
| last_indexed | 2024-03-07T15:27:39Z |
| publishDate | 2024-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj.art-47d8a065a0344de09b3f0b13b0f5a6f12024-03-05T16:35:56ZengNature PortfolioNature Communications2041-17232024-01-0115111010.1038/s41467-024-45142-0Boosting the electron beam transmittance of field emission cathode using a self-charging gateDongyang Xiao0Huanhuan Du1Leimeng Sun2Xiaochen Suo3Yurong Wang4Yili Zhang5Shaolin Zhang6Shuangyang Kuang7Fangjing Hu8Liangcheng Tu9Daren Yu10Peiyi Song11School of Optics and Electronic Information, Huazhong University of Science and TechnologySchool of Optics and Electronic Information, Huazhong University of Science and TechnologySchool of Optics and Electronic Information, Huazhong University of Science and TechnologyMOE Key Laboratory of Fundamental Physical Quantities Measurement & Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and TechnologyMOE Key Laboratory of Fundamental Physical Quantities Measurement & Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and TechnologyMOE Key Laboratory of Fundamental Physical Quantities Measurement & Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and TechnologyMOE Key Laboratory of Fundamental Physical Quantities Measurement & Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and TechnologyHubei Key Laboratory of Plasma Chemistry and Advanced Materials, School of Materials Science and Engineering, Wuhan Institute of TechnologyMOE Key Laboratory of Fundamental Physical Quantities Measurement & Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and TechnologyMOE Key Laboratory of Fundamental Physical Quantities Measurement & Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and TechnologyLab of Plasma Propulsion, Harbin Institute of Technology (HIT)MOE Key Laboratory of Fundamental Physical Quantities Measurement & Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and TechnologyAbstract The gate-type carbon nanotubes cathodes exhibit advantages in long-term stable emission owing to the uniformity of electrical field on the carbon nanotubes, but the gate inevitably reduces the transmittance of electron beam, posing challenges for system stabilities. In this work, we introduce electron beam focusing technique using the self-charging SiNx/Au/Si gate. The potential of SiNx is measured to be approximately −60 V quickly after the cathode turning on, the negative potential can be maintained as the emission goes on. The charged surface generates rebounding electrostatic forces on the following electrons, significantly focusing the electron beam on the center of gate hole and allowing them to pass through gate with minimal interceptions. An average transmittance of 96.17% is observed during 550 hours prototype test, the transmittance above 95% is recorded for the cathode current from 2.14 μA to 3.25 mA with the current density up to 17.54 mA cm−2.https://doi.org/10.1038/s41467-024-45142-0 |
| spellingShingle | Dongyang Xiao Huanhuan Du Leimeng Sun Xiaochen Suo Yurong Wang Yili Zhang Shaolin Zhang Shuangyang Kuang Fangjing Hu Liangcheng Tu Daren Yu Peiyi Song Boosting the electron beam transmittance of field emission cathode using a self-charging gate Nature Communications |
| title | Boosting the electron beam transmittance of field emission cathode using a self-charging gate |
| title_full | Boosting the electron beam transmittance of field emission cathode using a self-charging gate |
| title_fullStr | Boosting the electron beam transmittance of field emission cathode using a self-charging gate |
| title_full_unstemmed | Boosting the electron beam transmittance of field emission cathode using a self-charging gate |
| title_short | Boosting the electron beam transmittance of field emission cathode using a self-charging gate |
| title_sort | boosting the electron beam transmittance of field emission cathode using a self charging gate |
| url | https://doi.org/10.1038/s41467-024-45142-0 |
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