Future Dust Detection Experiments on Japanese Space Missions

Details Future Dust Detection Experiments on Japanese Space Missions Future Dust Detection Experiments on Japanese Space Missions

Sep 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996dps....28.1605s&link_type=abstract

American Astronomical Society, DPS meeting #28, #16.05; Bulletin of the American Astronomical Society, Vol. 28, p.1120

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Scientific paper

Direct measurements of dust particle in space have unveiled characteristics of interplanetary and interstellar dust particles. In addition to the approved PLANET-B MDC (Mars Dust Counter) in 1998, two dust detectors with mass spectrometry are proposed for Japanese future space missions: lunar and asteroid missions. A lunar orbiter mission is planned by NASDA (National Space Development Agency of Japan) and ISAS (The Institute of Space and Astronautical Science). The mission, which has also a relay satellite and a test lander, will be launched in 2003 by H-II vehicle. The orbiter is three-axis stabilized satellite that has both lunar and anti-lunar direction platforms. We propose two dust analyzers involving mass spectrometry using impact ionization: one on the lunar side will measure dust flux from the moon and the other on the anti-lunar side will measure interplanetary and interstellar particles. Each dust analyzer which has an axisymmetric ion mirror is 4.3kg in weight and 240x275x357 mm(3) in shape with 38000mm(2) aperture area. We aim at chemical analysis (with mass resolution m/dm >= 300) of dust particles as small as 1 micron. MUSES-C is an asteroid sample return mission which is managed by ISAS. It will be launched in late 2001 by M-V, will arrive at asteroid Nereus in 2004 and return back to the Earth with surface samples in 2006. In addition to the sampler, several scientific instruments are proposed to be on board MUSES-C. We propose an impact ionization dust detector with a simple ion mirror for mass spectrometry. The detector is 1.0kg in weight and 180x125x275 mm(3) in shape. The main purpose is to measure time and spatial variations of interplanetary and interstellar dust particles and to investigate if dust particles are enhanced at Nereus orbit. To detect relatively low velocity particles around Nereus, we also propose to have a piezo film detector on the satellite surface.

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