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Networking Radiation Sensor Systems NITRD Workshop September 20, 2012

Networking Radiation Sensor Systems NITRD Workshop September 20, 2012. Richard Vojtech, Ph.D. Principal Deputy Assistant Director Transformational and Applied Research Directorate Domestic Nuclear Detection Office. The Questions.

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Networking Radiation Sensor Systems NITRD Workshop September 20, 2012

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  1. Networking Radiation Sensor SystemsNITRD WorkshopSeptember 20, 2012 Richard Vojtech, Ph.D. Principal Deputy Assistant Director Transformational and Applied Research Directorate Domestic Nuclear Detection Office

  2. The Questions • Will a networked system of portable radiation detectors outperform the same number of individual detector operating independently? • Will the networked system improve the ability to: • detect anomalous radioactive materials? • locate the materials? • identify the materials?

  3. The Program Goal • To demonstrate advanced technologies that improve the ability to detect, localize, and identifyradiological sources by combining data from multiple radiation detector nodes. • Key Questions: • How does the performance of the ensemble compare to that of the • individual detectors? • What are the strengths and weaknesses of each system approach? • Do trends in the data suggest which types of scenarios will • benefit the most from a tightly coupled network?

  4. “Intelligent” Radiation Sensor System Data Packet ~1 Hz Advanced algorithms combine the radiation, spatial, and temporal information from multiple sensors to make a collective assessment about the presence and location of radiological sources Sensor Array • Energy Spectrum • Sensor Position/Orientation • Timestamp N1 N2 Wireless Comms N5 N3 N4

  5. Detector Devices Smiths Detection General Electric Passport Systems

  6. System Characterization background step area Detector Pattern: Spiral + Rings Movable Track command trailers Subsetting 2 rings 6 quadrilaterals 7 triangles 2”x2” NaI (18) open “field” area Alt DD (4) Subsets 2 rings 6 quadrilaterals 7 triangles

  7. Initial Impressions from a Networked System • In simple cases IRSS shows benefits of networking for detection and agrees well with theoretical expectations • Networking can provide reduction in false alarms at the system level compared to a collection of individual sensors • Tracking of moving sources (even with a single sensor) was achieved with non-directional sensors

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