Observation of hydrogen and helium satellites in a turbulent plasma

Abstract Time-resolved measurements of satellites about the (1 s 2 s −1 s 3 d ) forbidden transition in helium, satellites both of the H δ line of hydrogen and of its splittings and, finally, satellites of He II 4868 A have been observed. The behavior of these satellites is correlated relative to each other and to previously reported satellites both on H β and near the 6632 A (1 s 2 p −1 s 3 p ) forbidden transition in helium. The appearance of the satellites is attributed to a strong field interaction between orthogonal components of the dynamic and quasistatic electric fields generated in a plasma by an instability.