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The gyrotron is capable of efficiently generating high-power millimeter-terahertz radiation. In THz waveband, the bulky volume is one of the major factors hindering the gyrotron development. It is in pressing demand for the mini-table-top gyrotrons. In order to reduce the volume of the cathode, a broadband ultra-low-voltage gyrotron is investigated in this paper. Through parameter optimization, the...
In a magnetic cusp gun, the canonical-angular- momentum (CAM) spread of the initially emitted electrons is crucial in generating substantial beam velocity spread. A new method called electron beam flow-feature compensation is proposed to build an axis-encircling electron beam with zero velocity spread by optimizing the cross-flow trajectories to compensate for the initial CAM spread. This method provides...
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