Space-Charge-Limiting Current of a Relativistic Electron Beam Propagating in a Rippled- Wall Waveguide
QIAN Bao-Liang1, LEI Yin-Zhao2, LIU Yong-Gui1, LI Chuan-Lu1
1Department of Applied Physics, National University of Defense Technology, Changsha 410073
2Center for Electromagnetics Research, Zhengzhou University of Technology, Zhengzhou 450002
Space-Charge-Limiting Current of a Relativistic Electron Beam Propagating in a Rippled- Wall Waveguide
1Department of Applied Physics, National University of Defense Technology, Changsha 410073
2Center for Electromagnetics Research, Zhengzhou University of Technology, Zhengzhou 450002
Abstract： A fluid model is used to derive the space-charge-limiting current of a relativistic electron beam drifting in a rippled-wall cylindrical waveguide. It is found that an enhancement of the space-charge-limiting current is found as long as optimum values of the ripple wavelength and amplitude are chosen. However, a very small ripple wavelength of the waveguide may reduce the space-charge-limiting current rapidly. The result should be of interest to the operation of backward-wave oscillators.
QIAN Bao-Liang;LEI Yin-Zhao;LIU Yong-Gui;LI Chuan-Lu. Space-Charge-Limiting Current of a Relativistic Electron Beam Propagating in a Rippled- Wall Waveguide
[J]. 中国物理快报, 2000, 17(3): 212-214.
QIAN Bao-Liang, LEI Yin-Zhao, LIU Yong-Gui, LI Chuan-Lu. Space-Charge-Limiting Current of a Relativistic Electron Beam Propagating in a Rippled- Wall Waveguide
. Chin. Phys. Lett., 2000, 17(3): 212-214.
2000, Vol. 17 
