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CCLDAS: Instrument development

Z. Sternovsky, and the CCLDAS team LASP, University of Colorado, Boulder, CO. CCLDAS: Instrument development . Motivation for dust instruments on and around the Moon ELDA: Electrostatic Lunar Dust Analyzer LDEX: Lunar Dust Experiment Summary. Outline.

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CCLDAS: Instrument development

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  1. Z. Sternovsky, and the CCLDAS team LASP, University of Colorado, Boulder, CO CCLDAS: Instrument development

  2. Motivation for dust instruments on and around the Moon ELDA: Electrostatic Lunar Dust Analyzer LDEX: Lunar Dust Experiment Summary Outline

  3. Dust near the surface and in the exosphere LEAM: Lunar Ejecta and Meteorite Experiment Clementine observations • Submicron sized dust • n ~ exp(H/HS), HS = 5 – 20 km • at 50 km alt. n ≈ 100 m-3 • 0.1 micron

  4. ELDA: Electrostatic Lunar Dust Analyzer Dust Trajectory Sensor (DTS) • PIDDP development (start summer of 2008) • Wire electrode array to detect the charge on the dust • Accurate trajectory reconstruction (1% speed, 1 deg direction)

  5. ELDA cont. CU laboratory measurements

  6. ELDA cont. ELDA: Combination of DTS with a deflection unit to Measure the charge, mass and trajectory (source) of single dust grains on the lunar surface Under development

  7. LDEX: Lunar Dust Experiment Dust detector for the LADEE mission UV spectrometer and neutral mass spectrometers on LADEE On-orbit dust detection ( approx. 20 – 100 km altitude range) Sensitivity to r = 0.2 micron dust Launch March 2012 LDEX prototype instrument built at LASP

  8. LDEX testing and calibration Heidelberg dust accelerator Impact signal Dust Impact charge QI mass m Time constant τI  impact velocity Q = 0.5 m v3.5 Submicron Fe particles, v = 1-20 km/s

  9. LDEX operation principle Operation principle Impact ionization dust detector MCP is used for improved sensitivity

  10. LDEX current status

  11. Summary Instrument development for future missions are part of the CCLDAS goals Instruments Dust detectors for orbit (LDEX) Lunar dust transport monitor (ELDA) Impact monitoring and composition analysis (LAMA) Electric field and plasma probes for the lunar surface

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