Observation of ion heating during stimulated Buneman instability in a temporally growing plasma
Department of Physics, Indian Institute of Technology Kanpur - Kanpur - 208016, India
Received: 25 July 2014
Accepted: 15 September 2014
Observations and conclusive measurements of ion heating during stimulated Buneman instability (BI) are reported in a temporally growing plasma, created by short-pulse electromagnetic waves. The instability lasts for during the pulse on time and arises when the applied electric-field amplitude supersedes the threshold critical electric field for free acceleration. During the initial period of plasma development after the launch of the pulsed waves, the maximum growth of BI is registered at . The analysis of time-resolved measurements of electron and ion energy distributions indicates an anomalous collision frequency and a hot ion energy tail that persists for more than 700 ns. The energy from the instability is responsible for bringing about the intense and rapid ionization observed upon its termination.
PACS: 52.35.-g – Waves, oscillations, and instabilities in plasmas and intense beams / 52.35.Qz – Microinstabilities (ion-acoustic, two-stream, loss-cone, beam-plasma, drift, ion- or electron-cyclotron, etc.) / 52.80.Pi – High-frequency and RF discharges
© EPLA, 2014