Networking radiation sensor systems nitrd workshop september 20 2012
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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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Networking radiation sensor systems nitrd workshop september 20 2012

Networking Radiation Sensor SystemsNITRD WorkshopSeptember 20, 2012

Richard Vojtech, Ph.D.

Principal Deputy Assistant Director

Transformational and Applied Research Directorate Domestic Nuclear Detection Office


The questions

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?


The program goal

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?


Intelligent radiation sensor system

“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


Detector devices

Detector Devices

Smiths Detection

General Electric

Passport Systems


System characterization

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


Initial impressions from a networked system

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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