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Chin. Phys. B, 2009, Vol. 18(6): 2452-2458    DOI: 10.1088/1674-1056/18/6/055
PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES Prev   Next  

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)
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
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.
Keywords:  Cherenkov source      slow wave structure      photonic band gap      three-dimensional particle-in-cell  
Received:  06 October 2008      Revised:  21 December 2008      Accepted manuscript online: 
PACS:  52.65.Rr (Particle-in-cell method)  
  41.60.Bq (Cherenkov radiation)  
  42.70.Qs (Photonic bandgap materials)  
Fund: 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).

Cite this article: 

Gao Xi(高喜), Yang Zi-Qiang(杨梓强), Qi Li-Mei(亓丽梅), Lan Feng(兰峰), Shi Zong-Jun(史宗君), Li Da-Zhi(李大治), and Liang Zheng(梁正) Three-dimensional simulation of a Ka-band relativistic Cherenkov source with metal photonic-band-gap structures 2009 Chin. Phys. B 18 2452

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