The MFAx4.3

Quad Channel Mixed-Field Analyser

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 coincidence and multiplicity counting, security and safeguards, mixed-field assay and imaging.

The analyser can function with or without a host PC. In stand-alone mode, separate digital TTL outputs for gamma and neutron events are provided from each channel for analysis using secondary instrumentation such as a coincidence counter. These outputs have a high real-time throughput and are synchronised in time with the incident event.

Connection to a PC or tablet via either Ethernet or Wi-Fi enables the use of a Graphical User Interface (GUI) where system configuration, auto-calibration and the analysis of PSD and PHS data can be performed. The GUI supports touchscreen functionality and scales appropriately to the number of MFA devices detected on the network.

An auto-calibration feature provides a convenient means for response matching detectors by automatically fine-tuning the dedicated HV supplies to align the PHS spectra obtained using a calibration source (typically 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
System
Input voltage 28 V to 40 V DC, 65 W
Dimensions 35 cm x 26 cm x 11 cm
Mass 4.8 kg
Temperature range Operating: 0ºC to 50ºC
Digitiser
Channel 4
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 32 Mbit EEPROM
Input protection Over limit diode protected
High voltage
Channels 4
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 coef. 50 ppm/0C
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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