Overview
The Relocatable
VACIS® unit is designed to provide
detailed radiographic images of large objects, specifically
large vehicles and cargo containers, by non-intrusive
means. It is capable of full target (bumper-to-bumper)
scans of objects up to 70 ft. (21.3 m) long. The unit
consists of two 90 ft. (27.4 m) long tracks, a gamma
ray source, and a 21 ft. (6.4 m) high detector tower.
Applications
The Relocatable VACIS unit can support many
requirements, including land border checkpoint contraband
screening,
seaport container and truck screening, manifest verification
and duty capture, force protection (military and high-threat
vehicle screening), and VIP vehicle security screening.
Features
The Relocatable VACIS unit utilizes a low-level gamma
ray radiation source to penetrate vehicles and cargo.
Absorption of this low-level radiation is progressively
measured by a sensitive array of detectors located on
the opposing side of the object. The truck, or target,
remains stationary during inspection, and the source
and detector arrays move synchronously along a set of
parallel tracks to cover the target's full length. Absorption
data is then fed to a computer where a digital image
is formed and optimized for display on a high resolution
video monitor. The radiographic image is analyzed by
the operator, and appropriate steps are taken if apparent
contraband and/or threat objects are present. Further
image analysis is available to the operator through the
integrated image processing software tools supplied with
the system. Image storage, transfer, and recall capabilities
are included.
Benefits
- Utilization of gamma rays, as opposed
to x-rays, allows for overall lower costs, higher
system availability,
ease of maintenance, and a smaller exclusion zone.
- It
typically scans at speeds of about 1 ft. (30 cm)
a second, allowing for full inspection of a 40 ft.
(12.2
m) container in less than one minute.
- The system is
easily relocated, with disassembly and reassembly
taking less than a day each.
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