Radial density profile change near lower hybrid frequency in M=0 helicon wave plasmas

Abstract

Radial density profiles are measured near the lower hybrid frequencies with various magnetic fields and frequencies in m = 0 mode helicon wave plasmas. Abrupt radial density changes occur near the lower hybrid frequency where the electron density is higher. Experiments under various conditions such as various magnetic fields and gases show that these phenomena occur near the lower hybrid frequencies. (C) 1998 Elsevier Science B.V.