Journal article
High definition large area mapping of geological samples using a Maia detector array in the Nuclear Microprobe
JS Laird, CG Ryan, R Kirkham, S Hu, DP Siddons, PA Dunn, A Kuczewski, D Parry, M Jensen, F Rudzik, R Szymanski, R Dodanwela, S Hogan, G Moorhead, P Davey, DN Jamieson
Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms | ELSEVIER SCIENCE BV | Published : 2019
Abstract
A Maia detector array has been adapted and installed on the CSIRO-MARC Nuclear Microprobe. Maia uses an annular array of 384 silicon detectors to provide a solid-angle of 1.3 sr to improve the collection of X-rays induced by Particle Induced X-ray Emission (PIXE) using a micron focussed MeV proton beam. It features event-by-event data acquisition with dead-time correction and pileup rejection and a total count-rate capacity above 10 M/s, versatile stage and beam scanning modes (coupled to the DAQ-36 system described previously) to cater for a variety of sample configuration and experimental needs, precise measurement of transit time and integration of beam fluence per pixel, and spectral dec..
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Funding Acknowledgements
The authors acknowledge grant funding from the Australian Government through the National Collaborative Research Infrastructure Strategy and CSIRO infrastructure development support. The NMP upgrade and Maia installation incorporated student projects by Marcus Sakarellos, Aude Thoni and Daniel Antonelli.