The dynamic velocity of long positive streamers observed using a multi-frame ICCD camera in a 57 cm air gap

The streamer propagation plays an important role in long air gap discharge. In this paper, a multi-frame intensified charge-coupled display (ICCD) camera was used to observe the long positive streamers in a 57?cm air gap. The propagation process of the 20?30?cm long streamers was captured, and the velocity variation in a single streamer was analysed. When applying a +210?290?kV lightning impulse voltage on a rod?plane gap with three different tips, the velocity of a streamer decreases from 8.3???2.7?mm?ns?1 at the ignition stage to 0.4???0.1?mm?ns?1 at the later stage. The influence of the applied voltage and the electrode size was obtained and analysed. Higher voltage amplitude and larger electrode size lead to a greater velocity. In addition, the relationship between the velocity and the background electric field is discussed here, and the experimental results are compared with an analytical model of different parameters.

[1]  Yuriy Serdyuk,et al.  The propagation of positive streamers in a weak and uniform background electric field , 2001 .

[2]  F. E. Peterkin,et al.  Triggering in trigatron spark gaps: A fundamental study , 1989 .

[3]  A. Kulikovsky.  POSITIVE STREAMER IN A WEAK FIELD IN AIR : A MOVING AVALANCHE-TO-STREAMER TRANSITION , 1998 .

[4]  S. Pancheshnyi,et al.  Development of a cathode-directed streamer discharge in air at different pressures: experiment and comparison with direct numerical simulation. , 2005, Physical review. E, Statistical, nonlinear, and soft matter physics.

[5]  N. Aleksandrov,et al.  Simulation of long-streamer propagation in air at atmospheric pressure , 1996 .

[6]  U. Ebert,et al.  Time Resolved Measurements of Streamer Inception in Air , 2008, IEEE Transactions on Plasma Science.

[7]  S. Starikovskaia,et al.  Role of photoionization processes in propagation of cathode-directed streamer , 2001 .

[8]  S. Pancheshnyi.  Role of electronegative gas admixtures in streamer start, propagation and branching phenomena , 2005 .

[9]  R. Zeng,et al.  The diameters of long positive streamers in atmospheric air under lightning impulse voltage , 2013 .

[10]  A. Luque,et al.  Positive and negative streamers in ambient air: modelling evolution and velocities , 2008, 0804.3539.

[11]  P. Williams,et al.  Experimental study of streamers in pure N2 and N2/O2 mixtures and a ≈13 cm gap , 2002 .

[12]  N. L. Allen,et al.  Dynamics of streamer propagation in air , 1999 .

[13]  G. Naidis.  Positive and negative streamers in air: velocity-diameter relation. , 2009, Physical review. E, Statistical, nonlinear, and soft matter physics.

[14]  J. Meek,et al.  Electrical breakdown of gases , 1953 .

[15]  I. Chalmers,et al.  The mechanism of spark breakdown in nitrogen, oxygen and sulphur hexafluoride , 1972, Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences.

[16]  N. L. Allen,et al.  The conditions required for the propagation of a cathode-directed positive streamer in air , 1995 .

[17]  Ute Ebert,et al.  Review of recent results on streamer discharges and discussion of their relevance for sprites and lightning , 2010 .

[18]  H. Raether.  Electron avalanches and breakdown in gases , 1964 .

[19]  S. Pancheshnyi,et al.  Two-dimensional numerical modelling of the cathode-directed streamer development in a long gap at high voltage , 2003 .

[20]  Lothar Schäfer,et al.  Multiple scales in streamer discharges, with an emphasis on moving boundary approximations , 2010 .

[21]  R. S. Sigmond.  The residual streamer channel: Return strokes and secondary streamers , 1984 .

[22]  R. Ono,et al.  Formation and structure of primary and secondary streamers in positive pulsed corona discharge—effect of oxygen concentration and applied voltage , 2003 .

[23]  J. Lowke,et al.  Streamer propagation in air , 1997 .

[24]  Yuri V. Shcherbakov,et al.  A high-speed high-responsive PMT-based detector , 2007, International Congress on High-Speed Imaging and Photonics.

[25]  van Ejm Bert Heesch,et al.  Analysis of streamer properties in air as function of pulse and reactor parameters by ICCD photography , 2008 .

[26]  R. Hackam,et al.  Propagation velocity of pulsed streamer discharges in atmospheric air , 2003 .

[27]  J. M. Meek,et al.  A Theory of Spark Discharge , 1940 .

[28]  Nicholas M. Spyrou,et al.  Numerical and experimental determination of ionizing front velocity in a DC point-to-plane corona discharge , 1995 .

[29]  A. Kulikovsky.  Analytical model of positive streamer in weak field in air: application to plasma chemical calculations , 1998 .

[30]  M. Nudnova,et al.  Streamer head structure: role of ionization and photoionization , 2008 .

[31]  Iu. P. Raizer.  Gas Discharge Physics , 1991 .

[32]  Chao Li,et al.  Spatially hybrid computations for streamer discharges : II. Fully 3D simulations , 2011, J. Comput. Phys..

[33]  N. Babaeva,et al.  Two-dimensional modelling of positive streamer dynamics in non-uniform electric fields in air , 1996 .

[34]  S. Katsuki,et al.  Positive- and Negative-Pulsed Streamer Discharges Generated by a 100-ns Pulsed-Power in Atmospheric Air , 2007, IEEE Transactions on Plasma Science.

[35]  M. Bayle,et al.  The development of breakdown in a homogeneous field at high overvoltages in helium-neon mixtures and nitrogen , 1975 .

[36]  Ute Ebert,et al.  Positive and negative streamers in ambient air: measuring diameter, velocity and dissipated energy , 2008, 0805.1376.

[37]  U. Ebert,et al.  Positive streamers in air and nitrogen of varying density: experiments on similarity laws , 2008, 0805.1364.