129 years ago today, on January 18, 1896 (December 4, 1895), the X-ray machine was exhibited for the first time. January 18, 1896 - The X-ray machine was exhibited for the first time. X-ray machine is a device that generates X-rays, which is mainly composed of an X-ray tube and an X-ray machine power supply, and the X-ray tube is composed of a cathode filament (Cathod) and an anode target (Anode) and a vacuum glass tube. The X-ray electromechanical source can be divided into two parts: a high-voltage power supply and a filament power supply. The filament power supply is used to heat the filament, and the high-voltage output end of the high-voltage power supply is located at both ends of the cathode filament and the anode target, providing a high-voltage electric field to accelerate the flow of active electrons on the filament to the anode target, forming a high-speed electron flow. There are two ways to generate X-rays: brake radiation (Bremsstrahlung) and characteristic radiation (Characteristic). Brake radiation: After a high-speed electron suddenly slows down, its kinetic energy is released in the form of X-rays; Characteristic radiation: High-speed electrons hit atoms and electrons in peripheral orbits, making them free and releasing energy, which is X-rays. X shutdown is widely used in medical and health care, science education, and various fields of industry. For example, X-ray machines can be used in hospitals to assist doctors in diagnosing diseases, for industrial non-destructive testing, and for security inspections in railway stations and airports.