The last decade has contributed to the rapid progress in gyrotron development. Megawatt-class, continuous wave gyrotrons are employed as high-power millimeter (mm)-wave sources for electron cyclotron heating (ECH) and current drive tokamaks stellarators. development pushes ECH from a minor major method. Also based technological complexes successfully applied resonance ion sources, microwave cer...

INTRODUCTION In this paper, we aim to discover “distinguished” researchers who have not been widely known based on bibliometrics. In many cases, some criteria concerning the amount of research achievements, such as the number of papers published and citations received, are determined, and then the research activities are evaluated regarding whether the criteria are satisfied. However, the simpl...