Four-channel 500 MHz PXI Express Digital Processor
Four channel 14 bit 500 MSPS pulse processor.
32k MCA spectrum per channel.
Processor peaking times adjustable from 0.048 - 63.4 μs.
Waveform capture and Pulse Shape Analysis.
Sophisticated pile-up inspection.
Sub-nanosec Timing Resolution.
PXI Express platform: x4 link.
Front and back panel digital I/O signals.
The Pixie-500 Express is a 4-channel digital pulse processor on a single 3U CompactPCI/PXI Express card. Designed for fast detectors such as LaBr3 , fast silicon strip detectors, plastic scintillators, or high rate HPGe applications, the Pixie-500 Express not only offers very high speed waveform acquisition but also pulse height measurements and time stamping for event reconstruction.
Incoming signals are digitized at a rate of 500 MSPS with a 14-bit ADC. The digital data stream is used for triggering, pile-up inspection and filtering in real time. Waveforms with 2 ns sampling intervals can be stored in an on-board 256 MB FIFO. Pulse height reconstruction, accumulation of a 32k MCA spectrum for each channel, and optional pulse height analysis are performed on an event-by-event basis by a SHARC digital signal processor and a Virtex-4 FPGA. Waveforms and spectra can be read out through the x4 PCI Express data interface at rates of several hundred MByte/s (theoretical limit 800 MByte/s per slot). The readout does not interfere with the data acquisition.