title: Effects of the transparent cathode on the performance of a relativistic magnetron with axial radiation.
abstract: Experimental investigation of the transparent cathode used in a relativistic magnetron with axial radiation is reported in this paper. The transparent cathode is composed of six separate stalks with the diameter of 6 mm. Under the working condition of 549 kV and ∼0.38 T, the relativistic magnetron with the transparent cathode experimentally produces a 550 MW microwave. The radiation mode is TE(11) at the frequency of 2.35 GHz. The total efficiency is 16.7%. The variations of the relative positions between the separate stalks and the anode blocks can perform the maximum difference of 4 ns in microwave duration. Compared with the conventional solid cathode, the transparent cathode provides faster startup time of 12 ns, relatively wider pulse duration of 35% and relatively higher efficiency of 10.6%.
authors.affiliation: College of Optoelectric Science and Engineering, National University of Defense Technology, Changsha, Hunan 410073, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Li
authors.forename: Yong-gui
authors.initials: YG
authors.lastname: Liu
authors.forename: Jun
authors.initials: J
authors.lastname: Zhang
authors.forename: Ting
authors.initials: T
authors.lastname: Shu
authors.forename: Han-wu
authors.initials: HW
authors.lastname: Yang
authors.forename: Yu-wei
authors.initials: YW
authors.lastname: Fan
authors.forename: Cheng-wei
authors.initials: CW
authors.lastname: Yuan