RadCam™ precisely and rapidly locates gamma radiation sources by acquiring and superimposing a color-coded nuclear image over a video image of the interrogated area. RadCam™ features include:

  • Precise location of radiation sources
  • Energy and intensity level detection,with spectroscopic capability from 60-1500 KeV
  • Rapid detection over a wide area
  • Pan and Tilt
  • Remote Operation
  • Fast, accurate, easy to use

The system is designed for harsh-environment field use and includes a ruggedized lap-top computer.

Applications

  • RadCam™ may be used in nuclear safety, radiation protection, and homeland security border and port surveillance.
  • RadCam™ gamma manages radioactive source contamination in research reactors, test reactors, and nuclear power generation.
  • RadCam™ monitors all phases of the nuclear materials fuel cycle, including refinement, fuel storage, decommissioning, site characterization, and storage of nuclear waste.
  • RadCam™ may be integrated with a highly maneuverable, stair-climbing robot for operation in severe environments.

Radiation Security Detection Systems – Homeland Security Radioactive Source Detection – Nuclear Safeguards & Detection Instruments – Radiation Camera – RadCam


PERFORMANCE

Gamma Energy Range Less than 60 keV to greater than 1.5 MeV
Dynamic Response Single Image better than 10:1 SNR
Activity Dynamic Range Less than 3.7 x 104 Bq to more than 3.7 x 1011 Bq
System Field of View 35 degrees
Nominal Time-to-Image 2 min with CA and 3.7 x 108 Bq point source at 40 m; 20 sec @ 3 m
Image Interval 4-mode: Counts, Time, Either, Both

GENERAL

Detector: Position-sensitive Photomultiplier Tube
Scintillator: Sodium Doped Cesium Iodide (CsI(Na))
Aperture: Sintered Tungsten Coded Mask* or Tungsten Pinhole
Operating System: Microsoft™ Windows 7
Control Software: RadCam™ rapid, real-time, image display, and processing. MS Windows standard file handling, naming, and saving.

*The mask, anti-mask position of the coded-aperture collimator enhances nuclear image quality by reducing background gamma events that do not correlate with gamma sources located in the nuclear camera’s gamma-radiation field-of-view.

A discrete source of gamma radiation in the system’s field of view will appear on the system monitor as a “hot spot.” The “hot spot” is presented in color – typically a dark red area to indicate the source of radiation, surrounded by cooler shades, indicating the edges of the hottest radioactivity.

RadCam™ software controls allow the user to adjust thresholds corresponding to the minimum and maximum intensity of the radiation signal displayed in the color scale of the image.

radiation_sources_in_pipes

Spectroscopy
Spectroscopy is a quantification of each detected gamma photon’s energy. The data acquired using the RadCam™ includes the x-y location (direction) and also the energy of each detected gamma photon. The energy information is stored approximately 500 channels deep for each x-y location in the system’s field of view. The user has the option to view the energy spectrum of the gamma photons that produced the color image, and to set energy thresholds on the spectrum.

Radiation data is filtered through a pin-hole aperture, also known as a collimator, which consists of a narrow tungsten shield, through which gamma photons pass. Inside the imager, the nuclear detector measures the direction to, and energy of, each “event”, or gamma photon. The RadCam™ software uses these detected locations to create the color-coded nuclear image shown on the monitor.

The RadCam™’s coded-aperture is a collection of many pin-holes of various shapes in a specific pattern. The pattern is uniquely designed for accurate reconstruction of the nuclear image and can reverse itself upon a 90-degree rotation of the coded aperture. Each hole in the pattern (or mask) becomes a solid in the rotated (anti-mask) position, and each location in the mask that was a solid becomes a hole. The mask, anti-mask position of the coded-aperture collimator enhances nuclear image quality by reducing (in the image) gamma events that do not correlate with the mask/anti-mask positions of the coded-aperture.

For further information about RadCam™ system, please contact Radiation Monitoring Devices, Inc:

Peter Waer
Product Manager
Radiation Monitoring Devices, Inc.
44 Hunt Street
Watertown, MA 02472

Tel: 617-668-6801 (general)
Tel: 617-668-6896 (direct)
Email: pwaer@rmdinc.com