Barium tungsten electrodes (usually referring to barium-containing tungsten-based reserve cathodes) play a vital role in pulsed lasers, especially gas discharge-excited pulsed lasers, and are mainly used as high-performance cathodes. Its application core lies in providing an efficient, stable and long-life electron emission source to support the high current and high repetition frequency pulse discharge required by the laser.

The application of barium tungsten electrode in high-frequency plasma benefits from its unique material properties: tungsten provides stability and heat resistance, and barium reduces the work function to improve the electron emission ability. This electrode is an efficient electron emission source in high-frequency plasma systems, which can help generate and maintain stable plasma and is widely used in material processing, surface treatment and plasma chemistry.

Low-temperature plasma refers to plasma generated at relatively low temperatures (usually room temperature to several hundred degrees Celsius). It has attracted much attention due to its unique advantages in materials science, biomedicine, environmental science and aerospace technology.

The realization of the machining accuracy of barium tungsten electrodes requires comprehensive control of multiple influencing factors such as material properties, machining parameters, environmental conditions, operating skills and quality inspection.