PROBLEM TO BE SOLVED: To provide a multi-radiation generation device capable of individually controlling emission and non-emission of electrons of a plurality of electron emission sources with a simpler configuration.SOLUTION: Disclosed is a radiation generation device which has a plurality of sets of a cathode 1 and a target 4 and also has a common extraction electrode 2 with respect to the cathode 1 and the target 4. A potential of the extraction electrode 2 is made constant, and a cutoff potential higher than the potential of the extraction electrode 2 and an electron emission potential lower than the potential of the extraction electrode 2 are selectively switched to be applied to the cathode 1.【課題】より簡易な構成によって、複数の電子放出源の電子の放出／非放出を個別に制御しうるマルチ放射線発生装置を提供する。【解決手段】カソード１とターゲット４とを複数組有し、該カソード１及びターゲット４に対して共通の引き出し電極２を有する放射線発生装置において、引き出し電極２の電位を一定とし、該引き出し電極２の電位よりも高いカットオフ電位と、該引き出し電極２の電位よりも低い電子放出電位とを、選択的に切り換えてカソード１に印加する。【選択図】図１
