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Novel Numerical Method for Calculating the Shadow Projection and Collisions of a Multi-Axis Goniometer at Diamond |
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- V. Grama, A. Wagner
DLS, Oxfordshire, United Kingdom
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Beamline I23 is a long-wavelength macromolecular crystallography beamline at Diamond Light Source. The end station is a unique instrument with a bespoke cryogenically cooled multi-axis goniometer and a large curved Pilatus 12M detector in a high vacuum environment. As experiments become limited by radiation damage to the crystals, optimised strategies are needed to orient crystals in the most efficient way to obtain a complete dataset with a minimal X-ray dose. Two key factors affect the optimisation strategies. Firstly, shadowing on the detector by the goniometer resulting in data loss in this region and secondly, collisions between the goniometer and other components in the end station restricting the available angular range for sample centering and data collection. This paper discusses the numerical methods for calculating the shadowing of a multi-axis goniometer on a semi-cylindrical detector and the calculation of the allowable angles for various conditions to prevent collisions with neighbouring components.
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Slides WEAA04 [61.267 MB]
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-MEDSI2016-WEAA04
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| About • |
paper received ※ 07 September 2016 paper accepted ※ 16 September 2016 issue date ※ 22 June 2017 |
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