X-RAY TUBE

摘要

An X-ray tube (11) which improves the heat dissipating characteristics and ensures the insulating characteristics over the long term is offered. A supporting member (25) supports an anode target (21) at one end thereof and is provided with an attachment portion (28) around the outer circumference of the other end. The attachment portion (28) is attached to the inner circumferential surface of the cylindrical portion (14a) of the second vacuum envelope member (14) so that the heat conductivity from the supporting member (25) to the second vacuum envelope member (14) can be improved by means of the attachment portion (28). A terminal (38) is provided at the end surface portion (14b) on the side of the other end of the second vacuum envelope member (14) for applying a voltage to the anode target (21). The terminal (38) is positioned away from the attachment portion (28) so that the temperature of the insulating material (42) that insulates the terminal (38) can be kept low and the insulating characteristics can be ensured over the long term.