Second generation laser-heated microfurnace for the preparation of microgram-sized graphite samples

Simple item page
dc.contributor.authorYang, Ben_AU
dc.contributor.authorSmith, AMen_AU
dc.contributor.authorLong, Sen_AU
dc.date.accessioned2022-05-05T22:29:53Zen_AU
dc.date.available2022-05-05T22:29:53Zen_AU
dc.date.issued2015-10-15en_AU
dc.date.statistics2022-05-04en_AU
dc.description.abstractWe present construction details and test results for two second-generation laser-heated microfurnaces (LHF-II) used to prepare graphite samples for Accelerator Mass Spectrometry (AMS) at ANSTO. Based on systematic studies aimed at optimising the performance of our prototype laser-heated microfurnace (LHF-I) (Smith et al., 2007 [1]; Smith et al., 2010 [2,3]; Yang et al., 2014 [4]), we have designed the LHF-II to have the following features: (i) it has a small reactor volume of 0.25 mL allowing us to completely graphitise carbon dioxide samples containing as little as 2 μg of C, (ii) it can operate over a large pressure range (0–3 bar) and so has the capacity to graphitise CO2 samples containing up to 100 μg of C; (iii) it is compact, with three valves integrated into the microfurnace body, (iv) it is compatible with our new miniaturised conventional graphitisation furnaces (MCF), also designed for small samples, and shares a common vacuum system. Early tests have shown that the extraneous carbon added during graphitisation in each LHF-II is of the order of 0.05 μg, assuming 100 pMC activity, similar to that of the prototype unit. We use a ‘budget’ fibre packaged array for the diode laser with custom built focusing optics. The use of a new infrared (IR) thermometer with a short focal length has allowed us to decrease the height of the light-proof safety enclosure. These innovations have produced a cheaper and more compact device. As with the LHF-I, feedback control of the catalyst temperature and logging of the reaction parameters is managed by a LabVIEW interface. Crown Copyright © 2015 Published by Elsevier B.V.en_AU
dc.identifier.citationYang, B., Smith, A. M., & Long, S. (2015). Second generation laser-heated microfurnace for the preparation of microgram-sized graphite samples. Paper presented to the AMS-13 the Thirteenth International Conference on Accelerator Mass Spectrometry, 24-29 August 2014, Aix en Provence, France. In Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 361, 363-371. doi:10.1016/j.nimb.2015.02.009en_AU
dc.identifier.conferenceenddate29 August 2014en_AU
dc.identifier.conferencenameAMS-13 The Thirteenth International Conference on Accelerator Mass Spectrometryen_AU
dc.identifier.conferenceplaceAix en Provence, Franceen_AU
dc.identifier.conferencestartdate24 August 2014en_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.pagination363-371en_AU
dc.identifier.urihttps://doi.org/10.1016/j.nimb.2015.02.009en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/13128en_AU
dc.identifier.volume361en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectGraphiteen_AU
dc.subjectGraphitizationen_AU
dc.subjectAluminiumen_AU
dc.subjectCarbonen_AU
dc.subjectCarbon dioxideen_AU
dc.subjectAcceleratorsen_AU
dc.subjectVacuum furnacesen_AU
dc.subjectMass spectroscopyen_AU
dc.titleSecond generation laser-heated microfurnace for the preparation of microgram-sized graphite samplesen_AU
dc.typeConference Paperen_AU
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
1-s2.0-S0168583X15001184-main.pdf
Size:
2.75 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Conference Publications