Development of a multi-lane X-ray mirror providing variable beam sizes

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Abstract

Grazing incidence mirrors are used on most X-ray synchrotron beamlines to focus, collimate or suppress harmonics. Increasingly beamline users are demanding variable beam shapes and sizes at the sample position. We have now developed a new concept to rapidly vary the beam size and shape of a focused X-ray beam. The surface of an elliptically figured mirror is divided into a number of laterally separated lanes, each of which is given an additional longitudinal height profile calculated to shape the X-ray beam to a top-hat profile in the focal plane. We have now fabricated two prototype mirrors and present the results of metrology tests and measurements made with one of the mirrors focusing the X-rays on a synchrotron beamline. We envisage that such mirrors could be widely applied to rapid beam-size switching on many synchrotron beamlines.

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Laundy, D., Sawhney, K., Nistea, I., Alcock, S. G., Pape, I., Sutter, J., … Evans, G. (2016). Development of a multi-lane X-ray mirror providing variable beam sizes. Review of Scientific Instruments, 87(5). https://doi.org/10.1063/1.4950732

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