Speaker
Dr
Tilo Reinert
(University of North Texas, U.S.A.)
Description
Nuclear microprobe analyses involve the spectrometry of signals from a set of different detectors, e.g. for particle induced X-ray emission (PIXE); particles from backscattering (BS), transmission (STIM), or forward scattering; electron detection; or even for ion beam induced light (IBIL). Besides data acquisition from the preamplifiers with subsequent digital pulse processing, a data acquisition system also needs beam scanning with data synchronization, and desirably, beam and stage control.
We report on the design and development of a scalable multi-channel data acquisition system that is based on 1-GHz, 12-bit digitizers with on board FPGA digital pulse processing. The digital pulse processing uses a parameterized transfer function that enables flexible and user friendly filter setup for pulse shaping to handle the various preamplifier signal shapes. Build into a compact PXIe chassis the digitizers communicate and synchronize their data via the backplane with a two channel, 16-bit DAC scan module with on board FPGA scan control. The system is connected via a PXIe-PCIe controller to the control PC with the user interface. The digital data acquisition system is discussed and performance tests are presented.
Primary author
Dr
Tilo Reinert
(University of North Texas, U.S.A.)
Co-author
Mr
Markus Jäger
(University of Leipzig, Germany)
