The Njord device is a flexible plasma device, which can be used with a helicon saddle antenna system to produce an inductively coupled plasma at one end of the chamber, in which for certain plasma parameters an ion beam has been detected, indicating that a double layer is formed near the entrance to the source. In addition, it can be used with a plasma produced by filaments along the walls and in an anode chamber at the opposite end from the helicon source. The anode chamber can be biased independently from the main chamber wall, which allows for ion or electron beam formation through a gridded hole between the anode and main chamber.
Text: Å. Fredriksen Drawings: G. Tribulato
Data sets: G. Tribulato, H. S. Byhring, C. Charles, and Å. Fredriksen.