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Streamer knotwilg branching; sudden transition in morphology of positive streamers in nitrogen

Heijmans, Luuk ; Clevis, T.T.J. ; Nijdam, Sander ; Veldhuizen, E.M. ; Ebert, Ute; Multiscale Dynamics

Journal of Physics D: Applied Physics, 2015, Vol.48, pp.1-10 [Tạp chí có phản biện]

ISSN: ; ISSN: 0022-3727

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  • Nhan đề:
    Streamer knotwilg branching; sudden transition in morphology of positive streamers in nitrogen
  • Tác giả: Heijmans, Luuk ; Clevis, T.T.J. ; Nijdam, Sander ; Veldhuizen, E.M. ; Ebert, Ute
  • Multiscale Dynamics
  • Chủ đề: Streamer ; Streamer Branching ; Streamer Discharge Morphology ; Leftover Ionisation ; Knotwilg
  • Là 1 phần của: Journal of Physics D: Applied Physics, 2015, Vol.48, pp.1-10
  • Mô tả: htmlabstractWe describe a peculiar branching phenomenon in positive repetitive streamer discharges in high purity nitrogen. We name it knotwilg branching after the Dutch word for a pollard willow tree. In a knotwilg branching a thick streamer suddenly splits into many thin streamers. Under some conditions this happens for all streamers in a discharge at about the same distance from the high-voltage electrode tip. At this distance, the thick streamers suddenly bend sharply and appear to propagate over a virtual surface surrounding the high-voltage electrode, rather than following the background electric field lines. From these bent thick streamers many, much thinner, streamers emerge that roughly follow the background electric field lines, creating the characteristic knotwilg branching. We have only found this particular morphology in high purity nitrogen at pressures in the range 50 to 200 mbar and for pulse repetition rates above 1 Hz; the experiments were performed for an electrode distance...
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: ; ISSN: 0022-3727

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