The new confocal heavy ion microprobe beamline at ANSTO: the first microprobe resolution tests and applications for elemental imaging and analysis

Simple item page
dc.contributor.authorPastuovic, Zen_AU
dc.contributor.authorSiegele, Ren_AU
dc.contributor.authorCohen, DDen_AU
dc.contributor.authorMann, Men_AU
dc.contributor.authorIonescu, Men_AU
dc.contributor.authorButton, Den_AU
dc.contributor.authorLong, Sen_AU
dc.date.accessioned2018-09-17T05:35:18Zen_AU
dc.date.available2018-09-17T05:35:18Zen_AU
dc.date.issued2017-08-01en_AU
dc.date.statistics2018-09-16en_AU
dc.description.abstractThe Centre for Accelerator Science facility at ANSTO has been expanded with the new NEC 6MV “SIRIUS” accelerator system in 2015. In this paper we present a detailed description of the new nuclear microprobe–Confocal Heavy Ion Micro-Probe (CHIMP) together with results of the microprobe resolution testing and the elemental analysis performed on typical samples of mineral ore deposits and hyper-accumulating plants regularly measured at ANSTO. The CHIMP focusing and scanning systems are based on the OM-150 Oxford quadrupole triplet and the OM-26 separated scan-coil doublet configurations. A maximum ion rigidity of 38.9amu-MeV was determined for the following nuclear microprobe configuration: the distance from object aperture to collimating slits of 5890mm, the working distance of 165mm and the lens bore diameter of 11mm. The overall distance from the object to the image plane is 7138mm. The CHIMP beamline has been tested with the 3MeV H+ and 6MeV He2+ ion beams. The settings of the object and collimating apertures have been optimized using the WinTRAX simulation code for calculation of the optimum acceptance settings in order to obtain the highest possible ion current for beam spot sizes of 1μm and 5μm. For optimized aperture settings of the CHIMP the beam brightness was measured to be ∼0.9pAμm−2mrad−2 for 3MeV H+ ions, while the brightness of ∼0.4pAμm−2mrad−2 was measured for 6MeV He2+ ions. The smallest beam sizes were achieved using a microbeam with reduced particle rate of 1000Hz passing through the object slit apertures several micrometers wide. Under these conditions a spatial resolution of ∼0.6μm×1.5μm for 3MeV H+ and ∼1.8μm×1.8μm for 6MeV He2+ microbeams in horizontal (and vertical) dimension has been achieved. The beam sizes were verified using STIM imaging on 2000 and 1000mesh Cu electron microscope grids. © 2017 Elsevier B.V.en_AU
dc.identifier.citationPastuovic, Z., Siegele, R., Cohen, D. D., Mann, M., Ionescu, M., Button, D., & Long, S. (2017). The new confocal heavy ion microprobe beamline at ANSTO: the first microprobe resolution tests and applications for elemental imaging and analysis. Paper presented to the 15th International Conference on Nuclear Microprobe Technology and Applications (ICNMTA), 1-5 August 2016, Lan Zhou, China. In Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 404, 1-8. doi:10.1016/j.nimb.2017.01.059en_AU
dc.identifier.conferenceenddate5 August 2016en_AU
dc.identifier.conferencenameThe 15th International Conference on Nuclear Microprobe Technology and Applicationsen_AU
dc.identifier.conferenceplaceLan Zhou, China.en_AU
dc.identifier.conferencestartdate1 August 2016en_AU
dc.identifier.govdoc8462en_AU
dc.identifier.issn0168-583Xen_AU
dc.identifier.journaltitleNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atomsen_AU
dc.identifier.pagination1-8en_AU
dc.identifier.urihttps://doi.org/10.1016/j.nimb.2017.01.059en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/9009en_AU
dc.identifier.volume404en_AU
dc.language.isoenen_AU
dc.publisherElsevier B.V.en_AU
dc.subjectAccelerator experimental facilitiesen_AU
dc.subjectEnergyen_AU
dc.subjectANSTOen_AU
dc.subjectElectron spectroscopyen_AU
dc.subjectResolutionen_AU
dc.subjectBeamsen_AU
dc.subjectBrightnessen_AU
dc.subjectPIXE analysisen_AU
dc.titleThe new confocal heavy ion microprobe beamline at ANSTO: the first microprobe resolution tests and applications for elemental imaging and analysisen_AU
dc.typeConference Paperen_AU
Files
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Conference Publications