usbBase
Single-Channel MCA with PMT High-Voltage Supply

usbBase: USB-Powered MCA + HV-generator

The usbBase consists of a an eMorpho multichannel analyser and an integrated high voltage generator and divider to power the photomultiplier (PMT). It plugs directly onto the PMT and can be powered and controlled via USB.

The high voltage divider can deliver 50 µA DC current and 10 mA pulse current to the PMT anode while maintaining excellent gain stability.
The device is sealed and specified over a temperature range of -15°C to +70°C.

The device is potted and all connectors are sealed against water and moisture intrusion. The USB and GPIO connectors are IP67 watertight connectors.

• USB-powered & controlled
• Use with any scintillator
• Plugs directly onto PMT
• Versions for 10 and 8-dynode PMTs available

• Energy histogram (on board) 4096 x 32
• Time measurement: Real time, life time
• Rate measurement: Histogramming and
  true input pulse rate
• Oscilloscope: 1024-point waveform capture
• List mode: Stores energies and time stamps
• Pulse shape analysis:
  For pile up rejection and particle identification
• Integrated non-volatile memory, 256-byte to 128 kByte

• Low-power HV unit with high drive strength
• 50 µA PMT DC anode current
• 10 mA PMT anode pulse current

• Supply current: 140 mA to 300 mA at HV=1000V
• Power supply: USB
• 10-bit or 12-bit waveform digitizing ADC;
• 20 MSPS to 80 MSPS

• Sealed construction
• Connectors are IP67 water tight.

• Open source application programmer's interface (API)
• Graphics user interface (requires IGOR PRO license)

• GPIO supports DAQ synchronization between modules.
• GPIO may support external temperature sensor.

• Flyer
• User's manual
• GUI documentation
• API documentation
• Sample code documentation
• Mechanical dimensions
• PMT pin outs
• Compatible PMT