Investigation of the Debye Effect for Submarine Detection Navy SBIR FY2010.1 Sol No.: Navy SBIR FY2010.1 Topic No.: N101-037 Topic Title: Investigation of the Debye Effect for Submarine Detection Proposal No.: N101-037-0740 Firm: Cortana Corporation 520 N. Washington Street, #200 Falls Church, Virginia 22046 Contact: John Pierce Phone: (703) 534-8000 Web Site: www.cortana.com Abstract: This research will employ existing theories of the Debye Effect to estimate amplitudes of electromagnetic signals produced by a submarine operating in a realistic ocean environment. Estimates will incorporate known properties-mass, valence, volume, and friction coefficient-of each ionic species in seawater. Estimates will be made for a range of realistic acoustic sources associated with submarine operations, covering a range of frequencies and waveforms. The capabilities of electromagnetic signals to propagate in seawater independently of acoustic signals will be assessed. This research also will use existing theories of the Colloid Effect to estimate amplitudes of electromagnetic signals produced by a submarine operating in a realistic ocean environment. Estimates will incorporate known and estimated properties of organic detritus and other sources of colloids found in the ocean. Finally, this research will revise and adapt existing theories of electrokinetic interface conversion to apply to the case of charged surfactant layers at the air-water interface. Special attention will be given to the analysis of signals radiated directly into the atmosphere from the surface layer. Benefits: This research will evaluate the possibility that submarines can generate an electromagnetic signature by the Debye Effect and/or related electrokinetic effects. If the outcome of the research is positive, the results will provide the US Navy with an additional ASW tool for potential detection of hostile submarines. It will also provide the Navy with insights necessary to protect its own submarines. It the outcome is negative, the results will eliminate one possible vulnerability that might threaten US submarine security. Return