Hebei Provincial Key Laboratory of Optic Electronic Information Materials

Baoding, China

Hebei Provincial Key Laboratory of Optic Electronic Information Materials

Baoding, China

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Dong L.,Hebei University | Dong L.,Hebei Provincial Key Laboratory of Optic Electronic Information Materials | Zhang X.,Hebei University | Zhang X.,Hebei Provincial Key Laboratory of Optic Electronic Information Materials | And 4 more authors.
Gaodianya Jishu/High Voltage Engineering | Year: 2014

In order to analyze the spatiotemporal structure of square superlattice pattern, for the first time, we took the instantaneous pictures corresponding to different current pulses in one shoot, using an intensified charge coupled device (ICCD) camera with three channels. Stable square superlattice patterns are obtained in different experimental conditions. In each half voltage cycle, the current waveform of the pattern is comprised of three current pulses, two of which are at the rising edge of the absolute value of voltage and the third one is at the falling edge. Consequently, the square superlattice pattern consists of three square sublattices. Two of them, which are composed of small dots and big dots respectively, represent discharge at the rising edge of the absolute value of voltage and interleave with each other. The other one, formed by small dots, locates at the centre of big dots, and represents at the falling edge of the voltage. Further analysis indicates that wall charges play an important role in forming the spatiotemporal structure of square superlattice patterns.


Dong L.,Hebei University | Dong L.,Hebei Provincial Key Laboratory of Optic Electronic Information Materials | Shen Z.,Hebei University | Shen Z.,Hebei Provincial Key Laboratory of Optic Electronic Information Materials | And 8 more authors.
Gaodianya Jishu/High Voltage Engineering | Year: 2012

The spatiotemporal structure of luminous square pattern in each half cycle of the applied voltage is investigated in a dielectric barrier discharge system by using a high speed camera for the first time. In air-argon dielectric barrier discharge, the discharge undergoes the random filament-hexagonal pattern-square pattern-chaos as the applied voltage increase. It is found that the square pattern is very stable. In every half cycle of the applied voltage, the discharge of the square pattern has two current pulses. A high speed camera is employed to take the pictures of discharges during the two current pulses by setting the exposure times to correspond to each pulse. It is found that a sparse luminous square sub-lattice pattern appears during each current pulse, and the interleaving of the two sets of sub-lattices results in the luminous square pattern observed by naked eye.

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