Detector Readout Systems
mesytec MPD-4 is a 4 channel pulse shape discriminator module. MPD-4 is used for particle discrimination in multi channel liquid scintillation detectors (for example BC501 or NE213). The identification signals are available as NIM and ECL pulses. For discriminator monitoring only 2 channels of peak sensing ADCs per scintillator channel are needed.
Fast preamps are integrated. The 4 channel unit fits into a single width (1/12) NIM module.
Fast preamps are integrated. The 4 channel unit fits into a single width (1/12) NIM module.
Features
- fast variable gain PMT input amplifier
- Signal filter, optimised for liquid scintillators
- Pulse shape detection unit based on a constant fraction discriminator (CFD) for rising edge stat and a zero crossing detector for tail length detection. The measured tail length is converted to an amplitude signal via time to analog converter (TAC)
- for monitoring:
- TAC output pulse (1 us) for neutron identification, amplitude independent
- Amplitude output pulse (1 us)
- Identification signals:
- Gate output (n + y signals)
- Trigger output selectable n or y or both
- Common trigger output, NIM, chainable
(also usable as ADC gate) - Multiple ECL trigger and amplitude / TAC signals at the rear side
- in fast mode:
- deadtime reduced to 250 ns. Trigger output width reduced to 30 ns. Analog outputs suppress
- all parameters can be set via front panel, USB
or mesytec control bus
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