The MFAx1.3

Single Channel Mixed-Field Analyser (MFA)

This extremely versatile digital analyser offers a complete real-time Pulse Shape Discrimination (PSD) solution for scintillation detectors with Multi-Channel Analyser (MCA) Pulse Height Spectra (PHS) analysis. The analyser has applications in coincident and multiplicity counting, security and safeguards, mixed-field assay and imaging.

The system can function with or without a host PC via an Ethernet connection. The PC connection affords the use of the PC-based Graphical User Interface (GUI) where system configuration, auto-calibration and the ability to analyse PSD and PHS data can be performed. When functioning independently (i.e. without a host PC) separate digital TTL outputs are available for analysis using secondary diagnostic instrumentation such as a coincident counter. The neutron and gamma TTL outputs toggle according to the event type, have a high real-time throughput, and are time correlated with the incident event.

An auto-calibration feature provides a convenient means for response matching detectors by automatically fine tuning the dedicated HV supply to align the PHS spectrum obtained using a calibration source (Cs-137).

  • 500 MSa/s sampling rate
  • 12-bit resolution
  • 3 Mpps PSD throughput
  • Time correlated TTL outputs
  • Built-in HV
  • Fully user configurable
  • Firmware upgradeable
  • Windows(R)-based interface
  • Low-contamination option
  • EJ301, EJ309, EJ299 and CLYC compatibility tested.
  • Neutron tomography
  • Plutonium/uranium assay
  • Multiplicity assay
  • Mixed field imaging
  • Spectroscopy
Item Data
System
Input voltage 28 V to 40 V DC, 25 W
Dimensions 26 cm x 26 cm x 11 cm
Mass 2.6 kg
Temperature range Operating: 0ºC to 50ºC
Digitiser
Channels 1
Full scale range 20 mVpp to 600 mVpp, user configurable VGA
Impedance 50 Ohm
Resolution 12-bit bipolar
Sampling rate 500 MSa/s
Acquisition window 148 ns
ADC clock Onboard PLL using internal oscillator
Communication interface Ethernet or Wi-Fi (<5 kpps), TTL (<3.3 Mpps), serial (used for debugging)
Onboard memory 16 Mbit EEPROM
Input protection Over limit diode protected
High voltage
Channels 1
High voltage max. -2000 V DC
Output voltage control via PC or tablet based graphical user interface
Regulation 0.001% for 0% to 100% load change
Stability 50 ppm/Hr, 200 ppm/8Hr
Temperature coefficient. 50 ppm/ºC
Current limit 120% of max. output current, 2 mA
Protection Short circuit and arc protected
Digital TTL output
Impedance 50 Ohm
Current limit 20 mA
Switching time <1 ns
Idle state 3.8 V, high
Active state 0 V, low
Pulse width 50 ns
Max. PSD throughput <3.3 Mpps/channel
Input-to-output jitter <6 ns
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