New developments in neutron imaging at DINGO
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Date
2021-11-25
Authors
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Publisher
Australian Nuclear Science and Technology Organisation
Abstract
The neutron radiography / tomography / imaging instrument DINGO is operational since October 2014 to support research at ANSTO. DINGO provides a useful tool to give a different insight into objects. A major part of applications from research and industrial users was demanding high resolution setup and fast scans on DINGO. The neutron beam size can be adjusted to the sample size from 25 x 25 mm 2 to 200 x 200 mm 2 with a resulting pixel size from 12μm to ~100μm. Depending on the sample composition a full tomography has been taken in 10 minute – 36 hours. During the recent OPAL long shutdown, a new sapphire filter has been installed to reduce the amount of epithermal and fast neutrons at the sample position. These high energy neutrons do not contribute to the image, only as noise, and increasing the radiation levels around the CMOS camera. This update will improve the image quality as well as the reliability of the whole instrument. In addition, we implement a new type of neutron tomography scan to address long samples like in drill cores. These samples can now be scanned horizontal up two 1.2 meter in length. For small core sizes we can run
up to three cores in one scan, which makes DINGO a very competitive instrument for fast high throughput imaging. A new software package for 3D reconstruction has been developed as well. It is an open source package based on the python toolbox “tomopy” with a GUI custom made for DINGO to enable users to run the reconstruction on their own computing environment. © 2021 The Authors
Description
Keywords
ANSTO, Australia, Measuring instruments, Neuton radiography, Images, Tomography, Neutron beams
Citation
Garbe, U., Bevitt, J., & Salvemini, F. (2021). New developments in neutron imaging at DINGO. Presentation to the ANSTO User Meeting, Online, 24-26 November 2021. Retrieved from: https://events01.synchrotron.org.au/event/146/contributions/4312/contribution.pdf