Transient plasma ball generation system at long distance
A new device based on very short pulsed discharges, generating plasmas balls and plumes over very long distances (up to several meters). These plasma balls travel in a dielectric guide at the end of which there is generation of an apparent plasma plume like zone, with a shape and intensity dependent on the discharge repetition rate. A secondary mixture plasma can be produced close to a given surface by adding other gas fluxes in the main gas stream. The plasma balls can be generated in gases at a repetition rate in the range from single shot to multi-kilohertz.
1. A plasma ball generation device comprising a didecthc barrier,
a discharge cell made entirely in insulating materials,
two or more electrodes arranged in the discharge cell,
the discharge cell being filled with a high pressure gas and wherein an electrical discharge is generated between the two or more electrodes at a discharge duration of sub-microseconds,
wherein an outlet of the cell is connected to an insulating guide, and
the insulating guide includes a secondary material inlet.
2. The plasma ball generation device according to claim 1 , wherein the discharge duration is subnanoseconds.
3. The plasma ball generation device according to claim 1 , wherein the guide comprises a dielectric wall.
4. The plasma ball generation device according to claim 1 , wherein the cell comprises a gas inlet connected to a gas source.
5. The plasma ball generation device according to claim 1 , wherein at least one of the electrodes is connected to the gas through the dielectric barrier.
6. The plasma ball generation device according to claim 1 , wherein at least one of the electrodes is split in several pieces to enable a synchronisation.
7. The plasma ball generation device according to claim 1 , wherein the two or more electrodes are arranged along the guide so as to be electrically connected by a plasma ball generated by the plasma ball generation inside the guide, to form an ultra-fast switch device.