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Microchannel Plates in Astronomy and Planetary Science

By James David Carpenter

Abstract

Since their declassification in the late 1960s microchannel plates (MCPs) have been used as detectors for X-ray and extreme ultraviolet (EUV) astronomy, offering a unique sensitivity in the EUV waveband. The post 1990 era, however, has seen a universal, and unexplained, reduction in EUV quantum efficiency (QE). An analysis of microchannel plate glass composition has recorded variations in along channel composition for the first time. These observations may provide insight into the lost QE problem and present a way forward for the development of future EUV missions. \ud Although originally developed as photon detectors MCPs have more recently been applied as low mass X-ray optics for X-ray astronomy and planetary science, where fluorescent X-rays from planetary surfaces yield information on surface composition. The Mercury Imaging X-ray Spectrometer (MIXS), on the BepiColombo mission to Mercury, will have two instrument channels, both of which use MCP optical elements. The optimisation of the high spatial resolution imaging X-ray optics of MIXS-T is described and the novel MCP collimator geometry for the high throughput MIXS-C channel is introduced for the first time. The performance of both channels at Mercury is predicted. \ud An in situ investigation into the effects of the International Space Station space environment on MCP optics has led to the serendipitous discovery of nanometre scale dust particles in near Earth space and the realisation of filmed MCPs as extremely sensitive cosmic dust detectors. Analysis of the exposed samples and evaluation of the discovery are presented and possibilities for future dedicated experiments are explored. \ud Microchannel plates continue to be an important technology in astronomy and planetary science. This thesis describes developments in traditional MCP applications and the introduction of new ones, all of which will lead to unique measurement capabilities and significant scientific advancements

Publisher: University of Leicester
Year: 2006
DOI identifier: 10.1029/2004JE002392
OAI identifier: oai:lra.le.ac.uk:2381/7983

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Citations

  1. (1997). 14 other authors,
  2. (1984). 37, ICRU International Commission on Radiation Units and Measurements, Stopping Powers for Electrons and Positrons, doi
  3. (2000). A micromachined collimator for planetary mission, 3rd round table on micro/nano-technologies for Space,
  4. (1984). Advances in soft X-ray performance of Microchannel Plate Detectors . doi
  5. (1969). AIAA Hypervelocity Impact Conference, doi
  6. (2000). and 16 other authors,
  7. (2001). and 26 other authors,
  8. (1981). Basaltic Volcanism Study Project, Basaltic volcanism on the terrestrial planets, sponsored by the Lunar and Planetary Institute, doi
  9. (2000). BepiColombo: an interdiciplinary cornerstone mission to planet Mercury.
  10. (1998). Eds, doi
  11. (1995). Esa internal report, Statement of work for the development of microchannel plate imaging system for hard X-rays, ESA TRP contract 12193/96/NL/SB,
  12. (2003). Exploring Mercury: The Iron Planet, Springer-Praxis,
  13. (1970). Geochemical exploration of the Moon and Planets, doi
  14. (1993). Hard X-ray Telescope: a proposal for the ESA M3 mission opportunity.
  15. (1991). Hypervelocity impact microfoil perforations in the LEO space environment (LDEF,
  16. (1992). Hypervelocity impacts on space detectors: decoding the projectile parameters. in Hypervelocity impacts in space,
  17. (2000). Imaging X-ray fluorescence using microchannel plate (MCP) optics, CHESS report, see HTTP://www.Ins.cornell.edu/public/reu/2000reports/skala.pdf,
  18. (1997). Imaging X-ray Fluorescence,
  19. (1989). Impact cratering: a geologic process, doi
  20. (1975). In: Interplanetary dust and zodiacal light; doi
  21. (2001). Instrumentation. In Interplanetary Dust, edited by E.GrĂ¼n., doi
  22. (1965). Investigations of high speed impact phenomena,
  23. (1970). LASL report LA-4403,
  24. (1981). Low energy X-ray interactions, photoionization, scattering, specular and Bragg reflection, doi
  25. (1994). MCP optics, doi
  26. (1966). Meteoroid impact on the Lunar surface, The lunar surface Layer, doi
  27. (2001). Microchannel plates in Astronomy, Thesis,
  28. (2001). Near Earth Environment, in Interplanetary Dust, doi
  29. (1988). Origin and composition of Mercury,
  30. (2004). Particle size effects in X-ray fluorescence at a large phase angle: importance on elemental analysis of asteroid Eros (433), Lunar and planetary space science conference,
  31. (2004). personal communication,
  32. (1978). Planetary gamma ray spectroscopy, In NASA. Goddard Space Flight Centre Gamma Ray Spectry.
  33. Present bounds on the bulk composition of Mercury - Implications for planetary formation processes,
  34. (2004). Processing, analysis and interpretation of data from impact detectors,
  35. (2004). RHESSI Observations of a Simple Large X-ray Flare on 11-03-2003, Arxiv preprint astro-ph/0401381,
  36. (1994). Scientific Microchannel plates,
  37. The cratering record on Mercury and the origin of impacting objects, doi
  38. (1986). The Giotto particulate impact analyser,
  39. (2002). The new NASA Orbital debris engineering model ORDEM2000, presented at NASA/TP-2002-210780, S-890, NASA,
  40. (1994). The Q reference manual,
  41. (1963). The scattering of electromagnetic waves from rough surfaces, doi
  42. (2001). The Spectroscopy of DA White Dwarfs At High Resolution, PhD Thesis,
  43. (2001). The Xray spectrometer for Mercury MESSENGER, workshop on Mercury: Space Environment and Interior, doi
  44. (2001). X-ray data booklet,
  45. (1984). X-ray detectors in Astronomy. Cambridge Astrophysics Series.
  46. (2004). X-ray mirror expose experiment on
  47. (1993). X-rays and their properties, doi
  48. (2003). X-rays study at Mercury distance, ESA internal report,
  49. (1968). XComputing devices report 989/FR1,

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