Title :
Stable Sheet-Beam Transport in Periodic Nonsymmetric Quadrupole Field
Author :
Wang, Zhanliang ; Gong, Yubin ; Wei, Yanyu ; Duan, Zhaoyun ; Gong, Huarong ; Lu, Zhigang ; Yue, Lingna ; Yin, Hairong ; Xu, Jin ; Li, Yuanbao ; Liu, Pukun ; Park, Gun-Sik
Author_Institution :
Nat. Key Lab. of High Power Vacuum Electron., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
Stable sheet electron-beam transport is critical for sheet-beam microwave device which is attractive for high-power millimeter wave to terahertz-regime radiation. This paper studies the stable sheet-beam transport in periodic nonsymmetric quadrupole field. First, the conditions for stable round- and sheet-beam transport in periodic magnetic quadrupole field are deduced. In the deduction, we find that the symmetric quadrupole field and the space-charge field of sheet beam are not well matched. In order to settle this problem, we use periodic nonsymmetric quadrupole field instead of periodic symmetric quadrupole field to transport sheet beam. Finally, 3-D PIC simulations verify the conditions for stable sheet-beam transport and show that periodic nonsymmetric quadrupole field is intrinsically well suited for sheet-beam transport.
Keywords :
electron beam effects; plasma simulation; plasma transport processes; plasma-beam interactions; space charge; 3-D PIC simulations; particle in cell; periodic magnetic quadrupole field; periodic nonsymmetric quadrupole field; space-charge field; stable round- beam transport; stable sheet electron-beam transport; High-power millimeter wave; magnetic quadrupole; sheet beam;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2009.2035501
