Submit Article

Asian Journal of Physics Vol. 33, Nos 9 & 10 (2024) 583-590

Dual mode sheet beam electron gun for a sub THz rectangular planar traveling wave tube amplifier

Ishita Srivastava*, Navya Sahu*, and G Naveen Babu#
*Department of Electrical Engineering, Shiv Nadar Institution of Eminence, Greater Noida-203 207, India
2Dayananda Sagar University, Bengaluru-562 112, India

This paper is dedicated to Dr Shrinivas Joshi

Towards optimizing the sheet beam characteristics for travelling wave tube (TWT) applications, this study presents a novel flat rectangular sheet-beam electron gun model that operates in dual modes to accommodate both high and low beam currents. Versatility of a sheet-beam electron gun enables seamless transitions between continuous and pulsed modes of operation, offers greater flexibility in development and deployment of the TWT. A meticulous focus on geometry of the electron gun arrangement, guarantees an enhanced beam generation efficiency and accuracy. Furthermore, the electron beam trajectory was optimized by strategically deploying Periodic Permanent Magnets (PPM) and pole pieces, ensuring precise positioning within the TWT’s drift tunnel. Through comprehensive optimization, the proposed electron gun significantly enhances the performance and efficiency of sheet beam transmission in TWTs, promising advancements in high-frequency signal amplification and communication systems. © Anita Publications. All rights reserved.
Doi: 10.54955/AJP.33.9-10.2024.583-589
Keywords: Sheet-beam, drift tunnel, Slow wave structure, High frequency amplification.

Peer Review Information
Method: Single- anonymous; Screened for Plagiarism? Yes
Buy this Article in Print © Anita Publications. All rights reserve

References

  1. Zheng Y, Gamzina D, Popovic B, Luhmann N C, Electron beam transport system for 263-GHz sheet beam TWT, IEEE Trans Electron Dev, 63(2016)4466–4472.
  2. Atkinson J E, Gajaria D D, Grant T J, Kimura T, Stockwell B C, Field M, Borwick R J, Brar B, Pasour J A, 8.3: A high aspect ratio, high current density sheet beam electron gun, In 2010 IEEE International Vacuum Electronics Conference (IVEC), (2010) 97-98. DOI: 10.1109/IVELEC.2010.5503586
  3. Baig A, Gamzina D, Kimura T, Atkinson J, Domier C, Popovic B, Himes L, Barchfeld R, Field M, Luhmann N C, Performance of a nano-CNC machined 220-GHz traveling wave tube amplifier,IEEE Trans Electron Dev, 64(2017)2390–2397.
  4. Qiu S, Zheng Y, Design of an Electron Optical System for a 263 GHz Sheet Beam TWT, In 2023 24th International Vacuum Electronics Conference (IVEC), (2023)1-2; doi. 10.1109/IVEC56627.2023.10157365.
  5. Ouyang Z, Shu G, Zhang L, He W, Design of a sheet electron beam gun for a sub-terahertz travelling wave amplifier, In 2020 Cross Strait Radio Science & Wireless Technology Conference (CSRSWTC), (2020)1-3;10.1109/CSRSWTC50769.2020.9372517.
  6. Pan H, Shu G, Xie X, Liao J, He J, He W, Design of a Sheet Beam Electron Gun for a 220 GHz Traveling Wave Tube In 2023 24th International Vacuum Electronics Conference (IVEC), (2023)1-2. doi.10.1109/IVEC56627.2023.10156894
  7. Jiang S, Wulam M, Xu Y, Tang T, Wang Z, Gong H, Gong Y, Duan Z, A novel tunable PCM focusing system for a 220 GHz sheet beam electron gun, In 2020 IEEE 21st International Conference on Vacuum Electronics (IVEC), (2020)383-384. doi. 10.1109/IVEC45766.2020.9520527
  8. Jiang S, Zhaoyun D, Guang Y, Leidong J, Xirui Z, Hanwen T, Zhanliang W, Huarong G, Yubin G, Sheet beam electron gun with high current for 220 GHz TWT. In 2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), pp. 1-2. IEEE, 2018.
  9. Zheng Y, Gamzina D, Luhmann N C, 0.2-THz dual mode sheet beam traveling wave tube,IEEE Trans Electron Dev, 64(2017)1767–1773.
  10. Li L, Wang Y, Liu W, Wang Y, Wang J, Srivastava A, So J K, Park G S, Development of high-current sheet beam cathodes for terahertz sources,IEEE Trans Electron Dev, 56(2009)762–768.
  11. Srivastava A, So J K, Wang Y, Wang J, Raju R S, Han S T, Park G S, Design of sheet-beam electron gun with planar cathode for terahertz devices,J Infrared Millim Terahertz Waves, 30(2009)670–678.
  12. Computer Simulation Tool – Particle Simulator, Dassault Systems, 2024

Related Posts