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TY - CONF AU - Grama, V. AU - Wagner, A. ED - Casas, Joan ED - Schaa, Volker RW ED - Costa, Isidre ED - López, David ED - Prieto, Montserrat TI - Novel Numerical Method for Calculating the Shadow Projection and Collisions of a Multi-Axis Goniometer at Diamond J2 - Proc. of MEDSI2016, Barcelona, Spain, 11-16 September 2016 CY - Barcelona, Spain T2 - Mechanical Engineering Design of Synchrotron Radiation Equipment and Instrumentation Conference T3 - 9 LA - english AB - 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. PB - JACoW Publishing CP - Geneva, Switzerland SP - 267 EP - 271 KW - ion KW - detector KW - vacuum KW - factory KW - alignment DA - 2017/06 PY - 2017 SN - 978-3-95450-188-5 DO - doi:10.18429/JACoW-MEDSI2016-WEAA04 UR - http://jacow.org/medsi2016/papers/weaa04.pdf ER -