中国物理B ›› 2009, Vol. 18 ›› Issue (6): 2452-2458.doi: 10.1088/1674-1056/18/6/055

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Three-dimensional simulation of Ka-band relativistic Cherenkov source with metal photonic-band-gap structures

李大治1, 高喜2, 杨梓强2, 亓丽梅2, 兰峰2, 史宗君2, 梁正2   

  1. (1)Institute for Laser Technology, 2-6 Yamada-Oka, Suita, Osaka 565-0871, Japan; (2)Research Institute of High Energy Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China
  • 收稿日期:2008-10-06 修回日期:2008-12-21 出版日期:2009-06-20 发布日期:2009-06-20
  • 基金资助:
    Project supported by the National Key Basic Research Program of China (Grant No 2007CB31040) and the National Natural Science Foundation of China (Grant No 60571020).

Three-dimensional simulation of a Ka-band relativistic Cherenkov source with metal photonic-band-gap structures

Gao Xi(高喜)a)†, Yang Zi-Qiang(杨梓强)a), Qi Li-Mei(亓丽梅)a), Lan Feng(兰峰)a), Shi Zong-Jun(史宗君)a), Li Da-Zhi(李大治)b), and Liang Zheng(梁正)a)   

  1. a Research Institute of High Energy Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China; b Institute for Laser Technology, 2-6 Yamada-Oka, Suita, Osaka 565-0871, Japan
  • Received:2008-10-06 Revised:2008-12-21 Online:2009-06-20 Published:2009-06-20
  • Supported by:
    Project supported by the National Key Basic Research Program of China (Grant No 2007CB31040) and the National Natural Science Foundation of China (Grant No 60571020).

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摘要： This paper presents a three-dimensional particle-in-cell (PIC) simulation of a Ka-band relativistic Cherenkov source with a slow wave structure (SWS) consisting of metal photonic band gap (PBG) structures. In the simulation, a perfect match layer boundary is employed to absorb passing band modes supported by the PBG lattice with an artificial metal boundary. The simulated axial field distributions in the cross section and surface of the SWS demonstrate that the device operates in the vicinity of the П point of a TM01-like mode. The Fourier transformation spectra of the axial fields as functions of time and space show that only a single frequency appears at 36.27~GHz, which is in good agreement with that of the intersection of the dispersion curve with the slow space charge wave generated on the beam. The simulation results demonstrate that the SWS has good mode selectivity.

关键词: Cherenkov source, slow wave structure, photonic band gap, three-dimensional particle-in-cell

Abstract: This paper presents a three-dimensional particle-in-cell (PIC) simulation of a Ka-band relativistic Cherenkov source with a slow wave structure (SWS) consisting of metal photonic band gap (PBG) structures. In the simulation, a perfect match layer boundary is employed to absorb passing band modes supported by the PBG lattice with an artificial metal boundary. The simulated axial field distributions in the cross section and surface of the SWS demonstrate that the device operates in the vicinity of the $\pi$ point of a TM01-like mode. The Fourier transformation spectra of the axial fields as functions of time and space show that only a single frequency appears at 36.27~GHz, which is in good agreement with that of the intersection of the dispersion curve with the slow space charge wave generated on the beam. The simulation results demonstrate that the SWS has good mode selectivity.

Key words: Cherenkov source, slow wave structure, photonic band gap, three-dimensional particle-in-cell

中图分类号:  (Particle-in-cell method)

  • 52.65.Rr
41.60.Bq (Cherenkov radiation) 42.70.Qs (Photonic bandgap materials)