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It is reasonable for inexperienced users to expect the beamline staff to assist with the first-round of the data analysis. This will generally involve using GeoPIXE to fit the fluorescence data.
Please feel free to contact us if you want help to refine your output, once you have a good idea of what you want to display for publication.
Data acquired using the Maia or Vortex detector
X-ray fluorescence data collected at XFM using the Maia and Vortex detectors can be analysed using GeoPIXE software. GeoPIXE has been developed by CSIRO and more information can be obtained from the GeoPIXE web-site.
See GeoPIXE help page for more information.
GeoPIXE Data Analysis Workshop videos
Please visit the Workshop recordings on the Microscopy Group workshop page.
Also see the GeoPIXE help page for more information.
XFM users have free access to analyse their XFM data on GeoPIXE on the Australian Synchrotron’s ASCI computing platform.
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You can access ASCI at: https://asci.synchrotron.org.au logging in with your Australian Synchrotron user portal credentials. Getting started on ASCI: https://asci.readthedocs.io/en/latest/index.html This has information on how to download your data from ASCI. |
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Your data at XFM is organised in the following manner. above: Data folders shown in Windows File Explorer ‘/data/XFM/data/<Round>/<User_EPN#>/’ where <Round> is the year and round number. e.g., <2020r3> and <User_EPN#> is e.g., <Harland_16496> within the experiment’s <User_EPN#> directory are the subdirectories:
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GeoPIXE will typically report concentrations as ppm or wt%. A percent sign is shown if the concentration is wt%, otherwise, it is ppm. A common unit in XRF microscopy is areal density, typically specified as μg/cm2 or ng/cm2. Recall that μg/g is equivalent to ppm, so say for example a concentration is reported as 250 ppm or 250 μg/g, for a 10 μm thick sample having 1.1 g/cm3 density. The conversion to areal density is Areal density, μg/cm2 = 250 μg/g x 1.1 g/cm3 x 10 μm x 0.0001 cm/μm = 0.275 μg/cm2 GeoPIXE assumes the sample is a uniform thickness, so both over-estimations and under-estimations in concentration are possible with deviations from 10 um specified thickness. The thickness, density and sample matrix (e.g., cellulose, quartz, pyrite) are explicitly stated in the GeoPIXE Yield file setup. |
Data retention policy
Information on user data retention on the Australian Synchrotron’s scientific storage can be found here.