Generation of diffuse non-thermal atmosheric plasmas
OwnerMichael Kong, Xutao Denginventors
Life of this patent
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Abstract
A method of generating non-thermal atmospheric gas plasmas using an applied voltage with specially-shaped waveforms. The waveforms are shaped to avoid energy wastage by attenuating the voltage in the period after current discharge has occurred. A control system may also be used to shape the applied voltage waveform in response to the gas discharge current.
Claims20
A method of generating a gas plasma characterised by the feature that the applied voltage exhibits a waveform selected from the group consisting of:
- a waveform which is truncated, a waveform which decays asymmetrically from its peak value;
- and a waveform which is truncated and which decays asymmetrically from its peak value.
(canceled)
(canceled)
A method for generating a non-thermal atmospheric gas plasma comprising:
- applying a voltage having a periodic voltage waveform across a gas, thereby causing a current to flow through the gas, wherein the maximum magnitude of the voltage in each period is closer in time to a first preceding maximum in the magnitude of the current than to a second following maximum in the magnitude of the current and wherein the voltage waveform follows a sinusoidal function in a portion preceding the maximum magnitude of the voltage and is reduced below said sinusoidal function in a portion following the maximum magnitude of the voltage.
(canceled)
A method of generating a non-thermal atmospheric gas plasma characterised by applying a voltage having a periodic voltage waveform across a gas, thereby causing a current to flow through the gas, the voltage exhibits a waveform which decays asymmetrically from its peak value, wherein the peak value is the maximum magnitude of the voltage in each period, and wherein the peak value is closer in time to a preceding maximum in the magnitude of the current than to a second following maximum in the magnitude of the current.
(canceled)
Dependencies are inferred from the claim text.