Bulletin of the American Physical Society
76th Annual Gaseous Electronics Conference
Volume 68, Number 9
Monday–Friday, October 9–13, 2023; Michigan League, Ann Arbor, Michigan
Session IW5: Poster Session II; Exhibition & Coffee (4:00pm-6:00pm)
4:00 PM,
Wednesday, October 11, 2023
Room: Michigan League, Ballroom
Abstract: IW5.00008 : Reducing Starting Current of Smith-Purcell Radiation with a Two-Layer Grating Structure*
Presenter:
Md Arifuzzaman Faisal
(Michigan State University)
Authors:
Md Arifuzzaman Faisal
(Michigan State University)
Peng Zhang
(Michigan State University)
This study presents a novel approach to enhance the coupling of evanescent waves with an electron beam in SPR by utilizing a two-layer grating structure. The operating frequency of SPR with the two-layer grating is determined through the derivation of a cold-tube dispersion relation, which is further validated by CST and PIC simulations [4]. PIC simulations reveal that the two-layer gratings exhibit significantly higher radiation intensity. Moreover, the two-layer metallic gratings demonstrate the generation of coherent SPR with a reduced beam starting current [3]. This reduction in beam current yields several advantageous effects for particle accelerators, such as minimizing beam loss, prolonging cathode lifetime, and mitigating the heating of beam-carrying components.
REFERENCE
[1] S. J. Smith and E. M. Purcell, Phys. Rev. 92, 1069 (1953).
[2] J. Shu, P. Zhang, M. Liang, S.-P. Yang, S.-M. Wang, and Y.-B. Gong, Chin. Phys. B 31, 044103 (2022).
[3] M. Arifuzzaman Faisal and P. Zhang, IEEE Trans. Electron Devices 70, 2860 (2023).
[4] J. P. Verboncoeur, A. B. Langdon, and N. T. Gladd, Comput. Phys. Commun. 87, 199 (1995).
*This work was supported by the Air Force Office of Scientific Research (AFOSR) YIP Grant No. FA9550-18-1-0061, the Office of Naval Research (ONR) YIP Grant No. N00014-20-1-2681, the Air Force Office of Scientific Research (AFOSR) Grant No. FA9550-20-1-0409, and Grant No. FA9550-22-1-0523.
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