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Title: Application of precision engineering for nanometre focussing of hard X-rays in synchrotron beam lines
Authors: Scott, Stewart
Advisors: Cheng, K
Keywords: Zone plates;Diamond light source;Phase change materials
Issue Date: 2011
Publisher: Brunel University School of Engineering and Design Theses
Abstract: Many modern synchrotron beamlines are able to focus X-rays to a few microns in size. Although the technology to achieve this is well established, performing routine experiments with such beams is still time consuming and requires careful set up. Furthermore there is a need to be able to carry out experiments using hard X-ray beams with even smaller beams of between 100nm and 10nm. There are focussing optics that are able to do this but integrating these optics into a stable and a usable experimental set up are challenging. Experiments can often take some hours and any change in position of the beam on the sample will adversely affect the quality of the results. Experiments will often require scanning of the beam across the sample and so mechanisms suitable for high resolution but stable scanning are required. Performing routine experiments with nanometre sized beams requires mechanical systems to be able to position the sample, focussing optics, detectors and diagnostics with significantly higher levels of stability and motion resolution than is required from so called micro focus beam lines. This dissertation critically reviews precision engineering and associated technologies that are relevant for building nano focus beamlines, and the following key issues are explored: • Long term position stability due to thermal effects • Short term position stability due to vibration • Position motion with nanometre incremental motion • Results of some tests are presented and recommendations given. Some test results are presented and guidance on designing nano focus beamlines presented.
Description: This thesis was submitted for the degree of Master of Philosophy and awarded by Brunel University.
Appears in Collections:Brunel University Theses
Dept of Mechanical Aerospace and Civil Engineering Theses

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