Topic: Plasma generator, plasma jets, plasma jets for various applications, plasma generation, generating plasma

Plasma technology: The Openair® plasma jets as plasma generator

Plasma is generated by high voltage

The most important components of a plasma installation are the plasma jets and generators. An atmospheric-pressure plasma is generated by means of high-voltage discharge inside the plasma jet. A directed flow of air along the discharge section detaches parts of the plasma and transports them through a diaphragm to the surface of the material to be treated. The diaphragm holds back any parts of the stream of plasma carrying charge. In addition, it determines the geometry of the emergent beam.

Plasma striking the surface of the material	Plasma jet for large treatment widths	Openair® plasma jets for various applications

Power of plasma jets

Depending on the power of the plasma jets a single plasma beam can be up to 50 mm in length and achieve a treatment width of 25 mm. Depending on the power required in treatment the plasma source is moved at a spacing of 10 to 40 mm and at a speed of 6 to 600 mm/min relative to the surface of the material to be treated.

Apart from the single jets, Plasmatreat rotary systems are also available for pretreating relatively large areas. Depending on the application they comprise several plasma generators which rotate at very high speed. With plasma jets of suitable diameter in an appropriate arrangement surfaces up to 2,000 mm wide can be treated in a single pass.