Abstract
Energy consumption is a major concern for future large-scale high-energy accelerator projects such as the compact linear collider (CLIC), future circular collider (FCC), and international linear collider (ILC). Thus, efficient generation of microwave power recently gained new attention by the accelerator community. In response, we propose an innovative two-stage multibeam klystron (TS-MBK) concept. It combines a very high RF power generation efficiency (84%) with a compact and cost effective electro-mechanical configuration. This article presents the concept and design study of a 1.0-GHz, 24-MW klystron. The technological novelties and mitigation of issues specific to this concept are described. TS-MBK performance has been validated using particle-in-cell computer simulations.
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