A new plasma source, the plasma emitter

A new plasma source, the ’’plasma emitter,’’ was successfully developed by using thermionic plasma emission from a mixture of aluminosilicate and barium oxide. At an operating temperature around 1300 K, we have a plasma of density 1×107–2×108 cm−3 and temperature ≃0.16 eV. The plasma emitter, being quite simple in its construction and especially cheap, is very useful for various kinds of plasma experiments and applications.