Tungsten Electrode in Electron Gun Cathode
Tungsten electrodes are key thermionic emission materials used in electron gun cathode systems. They are widely applied in Electron Beam Welding (EBW), electron beam evaporation coating, X-ray equipment, electron microscopes, vacuum electronic devices, and scientific research instruments. In high-vacuum environments, tungsten electrodes serve as cathode emission sources, continuously releasing electrons to support electron beam generation and stable transmission. Their performance directly affects beam stability, focusing accuracy, and service life. Because electron gun systems require excellent electron emission stability, long cathode life, and outstanding high-temperature performance, high-purity tungsten and tungsten-based cathode material systems are commonly used.
1.Working Principle of Tungsten Electrode in Electron Gun Cathodes
Tungsten electrodes used as electron gun cathodes operate based on the principle of thermionic emission. When heated to high temperatures, the tungsten electrode emits electrons. In a high-vacuum environment, these electrons undergo minimal scattering and are accelerated and focused by electric fields to generate a high-energy electron beam for electron beam welding, thin-film deposition, material processing, inspection, and vacuum electronic devices. Tungsten has a melting point above 3410°C and a work function of approximately 4.5 eV. It offers excellent high-temperature stability and a low evaporation rate, enabling stable electron emission over extended operating periods.
2.Types of CTIA’s Tungsten Electrodes in Electron Gun Cathodes
The types and characteristics of CTIA’s tungsten electrodes in electron gun cathodes are shown below:
3.Applications of CTIA’s Tungsten Electrodes in Electron Gun Cathodes
CTIA’s tungsten electrodes, as electron gun cathodes, are mainly used in: (1) Electron beam welding equipment; (2) Electron beam evaporation coating equipment; (3) Scanning Electron Microscope (SEM); (4) Transmission Electron Microscope (TEM); (5) Industrial X-ray tubes and inspection equipment; (6) Vacuum electronic devices and scientific electron beam systems.
4.Specifications of CTIA’s Tungsten Electrodes in Electron Gun Cathodes
Diameter: 0.2–3.0 mm, customizable
Length: 5–100 mm, customizable
CTIA GROUP has over 30 years of experience in the manufacture of tungsten electrodes, supported by integrated capabilities in tungsten powder production, powder metallurgy, vacuum sintering, and precision machining. CTIA’s tungsten electrodes for electron gun systems are available in customized dimensions, tolerances, and tip configurations, delivering reliable electron emission performance for electron beam equipment, vacuum electronic devices, and advanced research applications.
For any inquiry, please contact tungsten electrode manufacturer: CTIA GROUP
Email: sales@chinatungsten.com
Tel: 0086 592 5129696 / 0086 592 5129595
Website: www.tungsten.com.cn
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