Hamamatsu-photonics K.k.

Tadaoki Matsushita

Tutomu Inazuru

Kenji Suzuki

Hiroki Kawakami

Yutaka Ochiai

Toshihiro Suzuki

Tsutomu Nakamura

Takane Yokoi

Mitsumasa Furukawa

Harumoto Sawada

An X-ray tube includes spacer which is cylindrical so it does not block electrons directed from a grid electrode toward a focusing electrode , and which has one end fixed to the grid electrode and the other end abutting against the focusing electrode . The distance between the grid electrode and focusing electrode is set to a predetermined distance by the spacer

X-ray tube

An X-ray tube includes spacer which is cylindrical so it does not block electrons directed from a grid electrode toward a focusing electrode , and which has one end fixed to the grid electrode and the other end 8c abutting against the focusing electrode . The distance between the grid electrode and focusing electrode is set to a predetermined distance by the spacer

An X-ray tube in which a cathode is heated to emit electrons and the electrons are bombarded against an anode target thereby generating X-rays includes a stem substrate mounted on an opening of a container housing the cathode a plurality of pins extending through the insulating substrate and adapted to supply a voltage into the container and pin covers mounted on the pins in the container and arranged at positions away from a surface of the stem substrate to cover base portions of the pins

This invention aims at providing an X-ray apparatus having a stable X-ray output. Since the focus electrode of the X-ray tube of the X-ray apparatus according to this invention maintains a ground potential, the focus diameter of electrons bombarded against a target becomes constant. Hence, the X-ray output emerging from an exit window is stabilized. Since the potential ratio of a cathode to the target is always constant, the electric field distribution between the cathode and the target is stabilized, thereby stabilizing the X-ray output emerging from the exit window.

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Hamamatsu, Japan

Tadaoki Matsushita