Omnidirectional Photonic Electric Field Sensor for Diagnosing Nuclear Weapons Effects

Award Information
Agency: Department of Defense
Branch: Defense Threat Reduction Agency
Contract: HDTRA1-11-P-0034
Agency Tracking Number: T102-011-0123
Amount: $99,975.00
Phase: Phase I
Program: SBIR
Awards Year: 2011
Solicitation Year: 2010
Solicitation Topic Code: DTRA102-011
Solicitation Number: 2010.2
Small Business Information
Srico, Inc.
DUNS: 609463302
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: Y
Principal Investigator
 Vincent Stenger
 Principal Research Engineer
 (614) 799-0664
Business Contact
 Judith Sriram
Title: VP&Business Manager
Phone: (614) 799-0664
Research Institution
High energy X-ray pulse sources used in nuclear weapons effects (NWE) tests can produce electromagnetic pulses through system generated electromagnetic pulse (SGEMP) effects. Improved diagnostics for NWE experiments is motivated by the need to accurately measure the test environment and to model the response of devices under test with reduced overall uncertainties in the presence of high energy X-ray radiation. In particular, Source Generated EMP (SGEMP) and Box Internal EMP (IEMP) experiments would greatly benefit from the development of compact, robust, non-perturbing electric and magnetic field sensors to measure the local fields induced by X-ray generated electron currents. SGEMP pulses can be as much as ten million volts per meter in strength, have rise times less than one nanosecond, and last for as much as several hundred nanoseconds. The current method of measuring electric and magnetic fields uses bulky and metallic B-dot and D-dot probes, which require an integrator to obtain the field values. At high frequencies, greater than several hundred megahertz, active integrators are required that limit the dynamic range and the low frequency response. This proposal specifically addresses the development of a photonic electric field sensor that would overcome the limitations of the D-dot electric field measurement devices. The photonic sensor optically isolates the SGEMP pulses from the measuring instrument to provide a safe and reliable measurement of high field strengths in high radiation energy environments. A compact, high speed, and omnidirectional sensor probe that does not suffer from electromagnetic field absorption and heating is the key component to an accurate SGEMP sensor. All-dielectric construction makes the proposed photonic probe technology inherently immune to EM heating effects, while highly flexible and thin optical fibers make it possible to route sensor cables through tightly confined spaces.

* information listed above is at the time of submission.

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