X-Ray Production PDF

Production of x-ray Basic Requirements for Production of X-Rays 1- Supply of Electrons 2- Movement of the Electrons Cloud of electrons Glass Envelope Anode Cathode  Components and Properties of an X-Ra...

Production of x-ray Basic Requirements for Production of X-Rays 1- Supply of Electrons 2- Movement of the Electrons Cloud of electrons Glass Envelope Anode Cathode  Components and Properties of an X-Ray Tube - An x-ray tube consists of two electrodes sealed into an evacuated glass envelope. 1- A negative electrode (cathode) which incorporates a fine tungsten coil or filament. 2- A positive electrode (anode) which incorporates a smooth flat metal target, usually of tungsten. Characteristics of anode 1- High atomic number (74). The higher the atomic number of a material the more efficient is the conversion from electrical energy into X-ray energy. 2- High melting point (690.F*). Most of the energy in the electrons bombarding the target is dissipated in the form of heat. The extremely high melting point of tungsten permits operation of the target at very high temperatures. 3- High thermal conductivity. Permits rapid removal of heat from the target, allowing maximum energy input for a given area size. 4- Low vapor pressure. This reduces the amount of target material vaporized during operation.  The X-Ray Tube High-voltage cables 80 – 140 kV Anode Rotor Vacuum Oil Cathode Bearings Stator windings Lead shielding x-ray beam