Observation of simultaneous cohorent oscillations in discharge curent and probe floating potential in coaxial DC glow discharges

Summary form only given. Hysteresis effects in the I-V characteristics of DC glow discharges have been a subject of considerable interest in different system configurations^1-4. Mostly these effects are observed in the presence of a third (auxiliary anode) electrode and have been attributed to formation of structures at this electrode. Also, nonlinear oscillations observed in either the auxiliary anode current or the floating potential of a Langmuir probe (LP) were attributed to dynamic changes in the structures. Recently, however, observations of floating potential oscillations without the use of auxiliary electrodes were reported in coaxial electrode geometry⁴.