X-ray generation apparatus and x-ray imaging apparatus

An X-ray generation apparatus comprising:

• an X-ray generation tube including an insulating tube, a cathode including an electron emitting portion, and an anode including a target that generates X-rays when electrons from the electron emitting portion collide;
• an accommodating container configured to accommodate the X-ray generation tube;
• and
• a driving circuit configured to drive the X-ray generation tube,
• wherein the accommodating container has an opening end, and the X-ray generation tube is arranged to close the opening end,
• the accommodating container is filled with an insulating liquid to contact the insulating tube,
• the accommodating container has a first space storing the driving circuit, and a second space protruding from the first space and storing the X-ray generation tube,
• the accommodating container includes a protrusion portion surrounding the second space, and one end of the second space forms the opening end,
• the entire insulating tube is stored in the second space,
• the protrusion portion is made of a conductor, and an insulating member is provided to cover an inner surface of the protrusion portion,
• at least the entire side surface of the cathode is covered with a member, and
• the member is charged to negative polarity by friction with the insulating liquid.