G - Physics – 01 – S
Patent
G - Physics
01
S
G01S 15/00 (2006.01)
Patent
CA 2041467
Process for generating powerful acoustical pulses by incorporating aluminum electrodes or high voltage/high current capacitors (or superconducting field coils) in the discharge circuits of plasma sparking devices ABSTRACT A plasma sparking device - "plasma gun," "plasma jet source" or "sparker" - is an electrically operated device that is used to generate acoustical pulses in underwater seismic range-finding and imaging. However, if the discharge power of a submerged plasma sparking device can be suitably stepped up (high current at high voltage), it can be made to produce acoustical pulses that are locally lethal, damaging or otherwise intolerable to a wide variety of unwanted marine organisms, including zebra mussels, thereby controlling their propagation in defined areas. Very powerful acoustical pulses from underwater or liquid- immersed plasma sparking devices have a number of other potential applications as well. The applicant has solved the problem of producing such high-powered acoustical pulses from liquid- immersed plasma sparking devices by the employment of high current/high voltage liquid dielectric capacitors (hereafter called oil-filled capacitors) or cryogenically cooled superconducting field coils in a plasma sparking device's spark discharge circuit. The applicant also has found that feeding electrodes made out of aluminum also significantly increase the power of the plasma plume at discharge and the consequent acoustical pulse.
Blake Cassels & Graydon Llp
Bryden Arthur D.
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