Applied Science and Convergence Technology 2021; 30(5): 141-145
Published online September 30, 2021
Copyright © The Korean Vacuum Society.
aApplied Physics Laboratory for PLasma Engineering (APPLE), Department of Physics, Chungnam National University, Daejeon 34134, Republic of Korea
bDepartment of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea
cAgency for Defense Development (ADD), Daejeon 34186, Republic of Korea
dInstitute of Quantum Systems (IQS), Chungnam National University, Daejeon 34134, Republic of Korea
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In this experimental research, the characteristics of the discharge generated using a flexible electrode at intermediate pressure were investigated. We confirmed the discharge patterns according to the pulse width and frequency of a pulse generator with a fixed voltage under a pressure of 0.3 atm, which is the pressure at a typical flight altitude. Uniform discharge was found to occur at a frequency of 10 kHz with a pulse width of 4 µs and at a frequency of 20 kHz with a pulse width of 3 µs. To analyze the trend of discharge patterns, the voltage and current waveforms of the discharge in each condition were measured. In addition, the power dissipated by one cycle was calculated from the measured voltage and current waveforms. From the measurement and calculation results, it was confirmed that the dissipated power was large when the discharge occurred at a frequency of 20 kHz with a pulse width of 3 µs, that is, the brighter and more uniform discharge pattern, which was found to be the optimal discharge condition for the flexible electrode at a pressure of 0.3 atm.
Keywords: Flexible electrode, Intermediate pressure, Plasma, Radar cross section