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BepiColombo GW Fraser Space Research Centre,

BepiColombo GW Fraser Space Research Centre, Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH 1. The BepiColombo Mission 2. The challenge of Mercury 3. MIXS 4. In anticipation – results from MESSENGER. Direction of MPO motion. Solar Coronal Primary

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BepiColombo GW Fraser Space Research Centre,

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  1. BepiColombo GW Fraser Space Research Centre, Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH 1. The BepiColombo Mission 2. The challenge of Mercury 3. MIXS 4. In anticipation – results from MESSENGER

  2. Direction of MPO motion Solar Coronal Primary X-ray Flux X-ray fluorescent and backscattered flux Planetary X-ray Remote Sensing

  3. NASA Mercury probe MESSENGER Launched 3rd August 2004 Mercury orbital insertion 18th March 2011 X-Ray Spectrometer (XRS) Collimated gas proportional counter X-ray fluorescence spectrometer. Three GPCs equipped with filters to overcome resolution limitations and resolve Al, Mg and Si fluorescence lines GPC1 4.5 μm Mg filter GPC2 6.3 μm Al filter GPC3 unfiltered Heritage of Design – Apollo 15, NEAR Shoemaker (never before in an active magnetosphere)

  4. Observed by MESSENGER –Targets for MIXS

  5. MIXS

  6. Science requirements for the mapping of the elemental composition of Mercury on global, intermediate and local scales dictate two complementary X-ray channels Wide field-of-view – Non-Imaging Collimator MIXS-C Narrow field-of-view – Imaging Telescope MIXS-T Common Detector Format for programmatic simplicity Common Enabling Technology – low mass, microchannel plate (MCP) optics

  7. MIXS-T X-ray results from Optically-Representative Sextant

  8. An X-ray Lens – the Square-Pore MCP Incident X-rays Double reflection (2-axes, true focus) Diffuse background Single reflection (1 axis, line focus)

  9. MCP Geometries 20-100 μm pores Unit size 40 x 40 mm 0.9 mm square multifibres Channel aspect ratio 10:1 -500:1 60% open area Planar (point-to-point focus) Radially packed, spherically slumped Wolter Type 1 approximation (top) Square packed, spherically slumped Lobster Eye geometry Square packed, cylindrically slumped Kirkpatrick Baez geometry K : few grams per square cm effective area, Manufactured by Photonis France Key technology for LOFT..... Optical microscopy of multifibres

  10. MIXS Optical Elements

  11. Calculated count rates in each channel for various solar states MIXS-T MIXS-C

  12. Optics module vibration testing at RALSpace 2nd Eigen-Frequency – MCP optic Measured 2394 Hz Predicted 2133Hz.

  13. Shock test on STM+ Shock input Accelerometers Ringing plate

  14. MIXS Status • FM delivery soon • All DEPFET detectors manufactured • All coated and filmed MCPs delivered to Leicester • delta Instrument Critical Design Review completed

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