Rotary-transmission-target microfocus X-ray source and ray generation method

A rotary-transmission-target microfocus X-ray source used in a X-ray generation method, the rotary-transmission-target microfocus X-ray source comprising:

• a chamber, wherein an electron beam system, a rotary anode target system and a cooling system are installed in the chamber, the electron beam system is arranged on a same side as an anode target rotating shaft in the rotary anode target system, a motor in the rotary anode target system drives an anode target to rotate through a bevel gear transmission device, an electron beam emitted by the electron beam system vertically bombards a metal target of the anode target, and the cooling system is configured to cool the anode target;
• and
• the method comprising:
• keeping the chamber in a vacuum state, connecting a cathode tip to a heating current, and starting to preheat;
• rotating the anode target constantly at a predetermined speed;
• and enabling the cooling system;
• and
• applying an electric field by using a high-voltage power supply so that an electron beam emitted by the cathode is accelerated to a predetermined electron kinetic energy through the high-voltage electric field;
• focusing the electron beam by using a first focusing lens, a second focusing lens, and a third focusing lens, and focusing the electron beam, in a predetermined shape and size, to the anode target;
• bombarding the metal target of the anode target vertically with the electron beam, and converting the bombardment energy of the electron beam into heat energy and X-rays, wherein the X-rays first pass through the anode target and then pass through an X-ray window to irradiate in the shape of a cone beam.