Abstract
A systematic investigation of the dynamical behaviors and traits of negative corona discharge in pure oxygen is performed and the microscopic physical mechanism of the discharge is studied. In the meantime, a new dynamical model is presented, which can predict different discharge phases including steady-state discharge and periodic discharge of saw-tooth pulses. The change in the discharge outputs with time is analyzed comprehensively using the nonlinear dynamics method, and the Trichel pulsed oscillation and the dynamical characteristics are described. In addition, the positive ions impacting the cathode and the negative ions can be treated as feedback signals for maintaining pulsed discharge at the constant external excitation. It is found that the gas pressure levels significantly affect the discharge behaviors and the pulsed characteristics of charged particles and glow radiation. In particular, the microscopic mechanism of gas pressure level influencing the negative corona discharge is discovered. Meanwhile, the pulsed characteristics of the discharge outputs are studied, and an explanation of the microscopic formation mechanism of the symmetrical and asymmetrical jagged pulses of diverse outputs is given. It is revealed that the mass, migration speed, and migration time of various particles have a great influence on discharge behaviors.
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