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The importance of monopole antennas for dust observations: Why Wind/WAVES does not detect nanodust
- Source :
- Geophysical Research Letters, Geophysical Research Letters, American Geophysical Union, 2014, 41 (8), pp.2716-2720. ⟨10.1002/2014GL059988⟩, Geophysical Research Letters, 2014, 41 (8), pp.2716-2720. ⟨10.1002/2014GL059988⟩
- Publication Year :
- 2014
- Publisher :
- American Geophysical Union (AGU), 2014.
-
Abstract
- The charge released by impact ionization of fast dust grains impinging on spacecraft is at the basis of a well-known technique for dust detection by wave instruments. Since most of the impact charges are recollected by the spacecraft, monopole antennas generally detect a much greater signal than dipoles. This is illustrated by comparing dust signals in monopole and dipole mode on different spacecraft and environments. It explains the weak sensitivity of Wind/WAVES dipole antennas for dust detection, so that it is not surprising that this instrument did not detect the interplanetary nanodust discovered by STEREO/WAVES. We propose an interpretation of the Wind dust data, elsewhere discussed by Malaspina et al. (2014), which explains the observed pulse amplitude and polarity for interstellar dust impacts, as well as the non-detection of nanodust. This proposed mechanism might be the dominant dust detection mechanism by some wave instruments using dipole antennas.<br />Accepted for publication in Geophys. Res. Lett. (April 9, 2014)
- Subjects :
- 010504 meteorology & atmospheric sciences
Magnetic monopole
FOS: Physical sciences
01 natural sciences
law.invention
law
0103 physical sciences
Wind wave
Astrophysics::Solar and Stellar Astrophysics
Dipole antenna
Instrumentation and Methods for Astrophysics (astro-ph.IM)
010303 astronomy & astrophysics
Solar and Stellar Astrophysics (astro-ph.SR)
ComputingMilieux_MISCELLANEOUS
Astrophysics::Galaxy Astrophysics
0105 earth and related environmental sciences
Cosmic dust
Earth and Planetary Astrophysics (astro-ph.EP)
[PHYS]Physics [physics]
Physics
Spacecraft
business.industry
Computational physics
Dipole
Impact ionization
Geophysics
Astrophysics - Solar and Stellar Astrophysics
[SDU]Sciences of the Universe [physics]
Physics::Space Physics
General Earth and Planetary Sciences
Astrophysics::Earth and Planetary Astrophysics
Astrophysics - Instrumentation and Methods for Astrophysics
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
business
Interplanetary spaceflight
Astrophysics - Earth and Planetary Astrophysics
Subjects
Details
- ISSN :
- 00948276 and 19448007
- Volume :
- 41
- Database :
- OpenAIRE
- Journal :
- Geophysical Research Letters
- Accession number :
- edsair.doi.dedup.....710c1d9f7a90606849a7337c7221a541