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TY - CONF AU - Butler, D.J. AU - Kelly, J.H. ED - Casas, Joan ED - Schaa, Volker RW ED - Costa, Isidre ED - López, David ED - Prieto, Montserrat TI - Design of the Diamond Light Source DMM for the VMXi Beamline 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 - A Double Multilayer Monochromator (DMM) was designed in-house for the VMXi beam-line. This paper describes the novel engineering solutions employed to build a high stability instrument. PiezoMotor® actuators drive sine-arm Bragg axes for both optics providing the coarse and fine motion in a single actuator. The long translation of the second multilayer is driven externally via a linear shift to eliminate in-vacuum pipe & cable motions. A high stability air bearing translates the whole DMM across the two multilayer stripes. The optics are water cooled via an Indium / Gallium eutectic alloy bath to minimise coupled vibrations. The DMM is operational on the VMXi beam-line, experimental and performance data is presented. PB - JACoW Publishing CP - Geneva, Switzerland SP - 420 EP - 424 KW - ion KW - vacuum KW - optics KW - GUI KW - radiation DA - 2017/06 PY - 2017 SN - 978-3-95450-188-5 DO - doi:10.18429/JACoW-MEDSI2016-FRBA03 UR - http://jacow.org/medsi2016/papers/frba03.pdf ER -