Buschmann, Lisa Marie; Fredriksen, Åshild (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-10)
The information about the electron population of a helicon source plasma that expands along a magnetic nozzle is important for understanding the plasma acceleration across the potential drop that forms in the nozzle. The electrons need an energy higher than the potential drop to escape from the source. At these energies the signal of a Langmuir probe is less accurate. An inverted RFEA measures the ...