Toshiba Electron Tubes & Devices Co., Ltd.

Naoki Akahori

Hidero Anno

Tomonari Ishihara

According to one embodiment, an X-ray tube includes an anode target, a cathode including a filament and a convergence electrode which includes a groove portion, and an envelope. The groove portion includes a pair of first bottom surfaces which are located in the same plane as the filament and between which the filament is interposed in a width direction of the groove portion, and a pair of second bottom surfaces between which the filament and the pair of first bottom surfaces are interposed in a length direction of the groove portion and which are located closer to an opening of the groove portion than the pair of first bottom surfaces.

Growing community of inventors

Otawara, Japan

Naoki Akahori