Portal Monitors

Spectroscopic Portal Monitor (SPM) detects and identifies gamma and neutron radiation. These systems are designed to stop illicit shipment of Special Nuclear Material (SNM) and other radionuclides; they are equally effective in industrial applications for monitoring incoming and outgoing materials streams.

• Spectroscopic Portal Monitor (SPM) is an isotope-identifying Portal implemented with multiple NaI scintillation detectors.
• Any number of portals may be connected via Ethernet to a central control PC, which provide hardware setup and calibration functions.
• TCP/IP networking over Ethernet supports many units and essentially unlimited distance between desktop and portal.
• SPM Portal is based on PGT’s patented QCC algorithm and MCA2500R technology
• Each Portal includes two or more 2” x 4 x” 16” NaI scintillators with digital pulse processing electronics, using a 50 MHz 14-bit ADC with software control over the trapezoidal filter shaping time
• The system can operate either as a standard 1024-channel MCA in linear mode or as a 512-channel MCA in QCC™ (Quadratic Compression Converter™) mode. In QCC mode, the system delivers uniform peak resolution from 20 to 3000 keV with up to 512 channels of resolution.
• The system delivers simple alarm and analysis reports, and also includes the respected QuantumMCA software for advanced spectroscopic analysis.
• Standard Detector Configuration
  • 4 pcs of NaI 2” x 4” x 16” / 2 per side
  • 2 pcs of He3 Neutron Detectors / 1 per side

Applications

• Vehicle monitoring
• Rail monitoring
• Cargo monitoring
• Pedestrian monitoring
• SNM Interdiction
• Waste contamination monitoring
• Building entry/exit security
• Medical facilities
• Industrial facilities
• Power plants

Standard Detector Configuration

• 4 pcs of NaI 2” x 4” x 16” / 2 per side
• 2 pcs of He3 Neutron Detectors / 1 per side

Full Specifications

Specifications of Spectroscopic Portal Monitor Detector Configuration
4 pcs 2” x 4” x 16” NaI detectors
Neutron Detection: 2 pcs Helium-3 neutron detectors; 19.7 in length, 2 in dia, 4 atm, 220 cps/nv
Integrated  Electronics:
4 pcs Digital signal-processing MCA ‘s
Energy Range: 18 keV – 3 MeV typical, user selectable in Quantum Software
Type: Base converter 14-bit pipelined-flash
Conv. Modes: Linear 256, 512, 1024 (2048 optional)
QCC 256, 512 (U.S. Patent 5,608,222)
LLD/ULD: 0 to 100% of FS adjustable in < .01% steps
Zero: ±100% of FS adjustable by channels
Pulse Processor: Trapezoidal filter with adjustable time constant (40ns – 10μs)
Bias Supply: 0 to +1200 V in 1-V steps (computer controlled)
Controller I/O –MCA 10/100 Ethernet port
Power: 90-247 VAC, 50-60 Hz with universal power converter (included); or
9-16 VDC @ 500mA direct input for use with batteries;
Typical power consumption: 6 watts ; Built-in self-resetting 1.5A fuse
Dimensions: 3 meters high x 4 meters wide (distance between stands)
Temperature Range: -20 to 50°C
Clock: Battery-backed real-time clock/calendar
Controls: Remotely operated through PC software
Patented Technology: Quadratic Compression Conversion (QCC)