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Temperature and pressure effects on the properties of positive

streamers in air

Citation for published version (APA):

Huiskamp, T., Heesch, van, E. J. M., Beckers, F. J. C. M., Hoeben, W. F. L. M., & Pemen, A. J. M. (2012). Temperature and pressure effects on the properties of positive streamers in air. In Book of Abstracts of the 24th Symposium Plasma Physics and Radiation Technology, 6-7 March 2012, Lunteren, The Netherlands (pp. 31-). Dutch Physical Society.

Document status and date: Published: 01/01/2012 Document Version:

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Temperature and pressure effects on the properties of positive

streamers in air

T. Huiskamp, E.J.M. van Heesch, F.J.C.M. Beckers, W.F.L.M. Hoeben, A.J.M. Pemen Department of Electrical Engineering, Eindhoven University of Technology We present experimental results on how the properties of positive, pulsed streamers in air depend on E/N (in V/cm2). Streamers are generated in a wire-cylinder reactor at constant voltage (so constant E). The density is changed either by varying the temperature (20-500 oC) at constant pressure (1000 mbar), or by varying the pressure (379-1000 mbar) at constant temperature (ambient temperature). A fast ICCD-camera (200 ps shutter-time) is used to analyze the spatial and temporal development of the streamers.

As an example, Fig. 1 shows the average streamer velocity as function of E/N. Increasing E/N results in higher energy-per-pulse and faster streamer development. A significant difference can be observed when changing the density by varying the temperature (black line), or by varying the pressure (grey line). The temperature effect is much more pronounced than the density effect. We will discusses these observations and compare them with findings in literature.

Fig. 1 Streamer velocity when varying E/N by temperature (black line) or by pressure (grey line)

This study is supported by the Dutch Technology Foundation STW as part of the Building on Transient Plasma program.

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