The HEOS 2 and HELIOS micrometeoroid experiments

Dietzel, H.; Eichhorn, Güenther; Fechtig, H.; Grün, E.; Hoffmann, H.-J.; Kissel, J.

doi:10.1088/0022-3735/6/3/008

Cited by 129 publications

(81 citation statements)

References 10 publications

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“…Simultaneous focusing of all elements is not possible with conventional time-lag focusing time-of-flight mass spectrometers (Dietzel et al, 1973).…”

Section: Discussionmentioning

confidence: 99%

“…A prior composition analyzer (Auer and Sitte, 1968;Auer, 1971;Friichtenicht et al, 1973;Dietzel et al, 1973) utilizes the plasma that is emitted when a dust particle impacts upon a solid surface. Ions are extracted from the plasma and analyzed in a time-of-flight mass spectrometer with respect to their charge-to-mass ratios.…”

Section: Introductionmentioning

confidence: 99%

“…That analyzer has one major disadvantage resulting from its low overall efficiency: the proportions of ions observed in the mass spectrum are usually very much different from the proportions of elements in the original particle. For example, alkali metals are overrepresented whenever the impact velocities are below approximately 20 km/s, whereas an element having a high electron work function like carbon may not be observable at all even though the original particle consisted of pure carbon (Dietzel et al, 1973;Drapatz and Michel, 1974).…”

Section: Introductionmentioning

confidence: 99%

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Composition analyzer for microparticles using a spark ion source

Auer

Berg

1975

Review of Scientific Instruments

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Iron microparticles were fired onto a capacitor-type microparticle detector which responded to an impact with a spark discharge. Ion currents were extracted from the spark and analyzed in a time-of-flight mass spectrometer. The mass spectra showed the elements of both detector and particle materials. The total extracted ion current was typically 10 A within a period of 100 nsec, indicating very efficient vaporization of the particle and ionization of the vapor. Potential applications include research on cosmic dust, atmospheric aerosols and cloud droplets, particles ejected by rocket or jet engines, by machining processes, or by nuclear bomb explosions.

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“…Simultaneous focusing of all elements is not possible with conventional time-lag focusing time-of-flight mass spectrometers (Dietzel et al, 1973).…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Composition analyzer for microparticles using a spark ion source

Auer

Berg

1975

Review of Scientific Instruments

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“…[16] An empirical relation for the impact plasma production yield (Y, in Coulomb) has been derived from the laboratory experiments [Dietzel et al, 1973;Göller and Grün, 1989]:…”

Section: Dust Impact-plasma Currentmentioning

confidence: 99%

Spacecraft charging near Enceladus

Hsu¹,

Horányi²,

Kempf³

et al. 2012

Geophysical Research Letters

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[1] In the vicinity of Enceladus, a geologically active moon of Saturn, the modeled spacecraft potential is significantly more negative than indicated by the Cassini Langmuir probe measurements. To understand this potential difference, we introduce two new dust-related charging currents: a) the dust ram current; and b) the dust impact-plasma current, in addition to the customary collection of electrons and ions, and photoemission. Our results show that these dust currents are important at high relative speeds between the spacecraft and the dust, or in regions with a low plasma-to-dust ratio, and can lead to reduced spacecraft charging.

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“…The Dust Telescope [52,53] proposed for DuneXpress is the latest development which is based on dust analyzers flown on Helios [14], the Halley missions [36], on Stardust [35] and on Cassini [54]. A Dust Telescope is a combination of a trajectory sensor with an analyzer for the elemental composition of micrometeoroids [53].…”

Section: Dust Telescope 1 (Dt1)mentioning

confidence: 99%

DuneXpress

et al. 2008

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The DuneXpress observatory will characterize interstellar and interplanetary dust in-situ, in order to provide crucial information not achievable with remote sensing astronomical methods. Galactic interstellar dust constitutes the solid phase of matter from which stars and planetary systems form. Interplanetary dust, from comets and asteroids, represents remnant material from bodies at different stages of early solar system evolution. Thus, studies of interstellar and interplanetary dust with DuneXpress in Earth orbit will provide a comparison between the composition of the interstellar medium and primitive planetary objects. Hence DuneXpress will provide insights into the physical conditions during planetary system formation. This comparison of interstellar and interplanetary dust addresses directly themes of highest priority in astrophysics and solar system science, which are described in ESA's Cosmic Vision. The discoveries of interstellar dust in the outer and inner solar system during the last decade suggest an innovative approach to the characteriza-

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The HEOS 2 and HELIOS micrometeoroid experiments

Cited by 129 publications

References 10 publications

Composition analyzer for microparticles using a spark ion source

Composition analyzer for microparticles using a spark ion source

Spacecraft charging near Enceladus

DuneXpress

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