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Gamma
Ray Imaging System
Fast
~ Portable
~ Spectroscopic
The RadCam 2000™
produces images of gamma radiation superimposed over a black
and white video image of the same field of view. The intensity
of the gamma radiation is presented in color with progressively
brighter colors corresponding to higher gamma activity. In
addition, spectra showing the isotopes present are shown for
user-selected areas of the image.
Standard System
The system runs in each of four basic modes:
- Pinhole collimator (high intensity applications)
- Coded aperture collimator (greater system sensitivity)
- Wide system field-of-view
- Narrow system field-of-view
System includes one coded
aperture collimator, one pinhole collimator, and the IMAGE
2000™ software.
RadCam 2000™ IMAGE 2000 software:
- Obtains image
- Displays an energy spectrum from an area-of-interest
in the image
- Displays an entire image based on spectral region-of-interest
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Features and Applications
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The monitor of the RadCam2000™ system presents a video
image of the interrogated scene. Onto this image the RadCam
gamma camera acquires and superimposes a color-coded nuclear
image based on the location, energy, and intensity of gamma
radiation from the interrogated scene.
Features
Detects gamma radiation. The pin-hole collimator, the coded-aperture
collimator, and user-set data acquisition time give the system
a wide range of sensitivity to gamma radiation.
The RadCam2000™ shows the location of radioactivity
and a spectrum of the detected gamma photons. This
spectroscopic feature helps the user identify the presence
of isotopes such as 137Cs, 60Co, or
57Co.
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.
The system is constructed for field use and includes a rugged
lap-top computer.
Applications
The RadCam2000™ may be applied to nuclear safeguards,
radiation protection, and homeland security, such as the remote
analysis of debris of a possible dirty bomb.
RadCam2000™ gamma radiation detection strengthens nuclear
security and reactor monitoring in research reactors, test
reactors, and nuclear power generation.
RadCam2000™ monitors a nuclear materials fuel cycle,
including refinement, fuel storage, decommissioning, site
characterization, and storage of nuclear waste.
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Technology/Specifications
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Performance
| Gamma Energy Range |
Less than 30 keV to greater than 1.5 MeV |
| Sensitivity/ Detection Limit |
Better than 3.7 x 104 Bq for 137Cs at 1m with 10:1
SNR. Similar for equivalent gamma intensities of Pu
and U (0.5 mg)
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| 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 |
Coded aperture wide 40 degrees/narrow 20
degrees |
| Nominal Time-to-Image |
30 s with coded aperture and 3.7 x 104
Bq point source at 1 m; 2 min with CA and 3.7 x 108
Bq point source at 40 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 XP
Control Software: IMAGE 2000™ rapid, real-time, image
display, and processing. MS Windows standard file handling,
naming, and saving.
Options
The standard system configuration is suitable for most applications.
Factory-installed options may be useful in particular applications:
- 1C: Wheeled cart
- 2B: Battery: For system use without 100-110VAC power
- 3D: Dosimetric Capability (includes laser range finder
and software)
- 4AR: Automatic rotation of coded aperture (hardware and
software)
- 5E: Ethernet control via wire network of LAN
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