rgy Dispersive X-ray fluorescence Spectrometer (XRF)- X-ray tube

X-ray tube

(1) Cathode - emits electrons. It is generally made of tungsten wire and releases thermal radiation electrons when heated by electricity.

(2) Anode - target, causing electrons to suddenly slow down and emit X-rays.

(3) Window - X-ray exit channel. It can both allow X-rays to be emitted and seal the tube. The window material is Lindeman glass composed of metallic beryllium or lithium beryllium borate. The window is often inclined at an Angle of 3 to 6 degrees to the target surface to reduce the obstruction of the emitted X-rays from the target surface.

(4) The efficiency of converting high-speed electrons into X-rays is only 1%, while the remaining 99% is dissipated as heat. Therefore, the target material should have good thermal conductivity, commonly made of brass or red copper, and also needs to be cooled by circulating water. Therefore, the power of the X-ray tube is limited, and a rotating anode is required for high power.

(5) Focus - The area on the surface of the anode target that is bombarded by electrons, from which X-rays are emitted. The size and shape of the focus are one of the important characteristics of the X-ray tube. The shape of the focus depends on the shape of the filament. A helical filament produces a rectangular focus

In X-ray diffraction work, fine focus and high intensity are desired. Fine focus points can improve resolution; High intensity can shorten the exposure time

The process by which an X-ray tube generates X-rays

The X-ray generator supplies heating current to the tungsten filament of the X-ray tube and provides a high-voltage electric field between the anode and the filament. The tungsten filament of the X-ray tube is heated to produce an electron cloud. Under the action of a high-voltage electric field, the electron cloud accelerates along the focusing tube and flies towards the anode target. The anode is bombarded by high-speed electrons, and the anode target material absorbs sufficient energy. The inner electrons of an atom then undergo transitions between energy levels in accordance with certain rules during the de-excitation process. Emit the absorbed energy out of the window in the form of X-rays.

Introduction to Long-Term Partners of KMX-RAY

Moxtek, USA www.moxtek.com

Moxtek was founded in 1986 and is divided into the X-ray department and the optical Devices department. It is a globally renowned high-tech enterprise that provides customers with innovative product application solutions.

Moxtek is one of the first companies in the world to produce small X-ray tubes. In addition, in the X-ray department, it also provides products such as Sin-PIN detectors, ultra-low noise junction field-effect transistors (JFETs), beryllium Windows and ultra-thin polymer X-ray Windows. Its products are widely used in high-performance X-ray equipment, such as EDXRF,WDXRF and XRF, etc., providing a complete set of solutions for X-ray tubes, Si-PIN detectors and digital pulse generators for XRF customers.