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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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Presentation Transcript
slide1

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

slide2

Direction of MPO motion

Solar

Coronal

Primary

X-ray Flux

X-ray fluorescent and backscattered flux

Planetary X-ray Remote Sensing

slide3

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)

slide6
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

slide9

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)

mcp geometries
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

optics module vibration testing at ralspace
Optics module vibration testing at RALSpace

2nd Eigen-Frequency – MCP optic

Measured 2394 Hz Predicted 2133Hz.

shock test on stm
Shock test on STM+

Shock input

Accelerometers

Ringing plate

slide15

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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