High definition large area mapping of geological samples using a Maia detector array in the Nuclear Microprobe

Journal Article · Sat Apr 20 00:00:00 EDT 2019 · Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms

DOI:https://doi.org/10.1016/j.nimb.2019.04.031· OSTI ID:1547290

Laird, J. S. ^[1]; Ryan, C. G. ^[2]; Kirkham, R. ^[2]; Hu, S. ^[2]; Siddons, D. P. ^[3]; Dunn, P. A. ^[2]; Kuczewski, A. ^[3]; Parry, D. ^[2]; Jensen, M. ^[2]; Rudzik, F. ^[4]; Szymanski, R. ^[4]; Dodanwela, R. ^[2]; Hogan, S. ^[2]; Moorhead, G. ^[2]; Davey, P. ^[2]; Jamieson, D. N. ^[4]

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1. Commonwealth Scientific and Industrial Research Organization (CSIRO), Clayton, VIC (Australia); Univ. of Melbourne (Australia)
2. Commonwealth Scientific and Industrial Research Organization (CSIRO), Clayton, VIC (Australia)
3. Brookhaven National Lab. (BNL), Upton, NY (United States)
4. Univ. of Melbourne (Australia)

A Maia detector array has been utilized 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 deconvolution of event data in real-time using the Dynamic Analysis method to provide element images during data collection. In this work we demonstrate the system on thin sections made from geological samples extracted from active seafloor hydrothermal vents in the PACMANUS hydrothermal field in Papua New Guinea.

• Research Organization: Brookhaven National Lab. (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES)
• Grant/Contract Number: SC0012704
• OSTI ID: 1547290
• Report Number(s): BNL-211928-2019-JAAM
• Journal Information: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 449, Issue C; ISSN 0168-583X
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
PIXE
Nuclear Microprobe
NMP
Maia detector
Data acquisition
Element imaging
Dynamic Analysis
GeoPIXE
Hydrothermal vents
PACMANUS
Volcanogenic massive sulfide deposits
VMS deposits