A chondrule-like object captured by space-exposed aerogel on the international space station

Noguchi, Takaaki; Nakamura, Tomoki; Ushikubo, T.; Kita, N. T.; Valley, John W.; Yamanaka, Riyo; Kimoto, Yugo; Kitazawa, Yoshiaki

doi:10.1016/j.epsl.2011.06.032

Cited by 17 publications

(9 citation statements)

References 39 publications

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“…A density of 0.01 g cm −3 for the surface layer is was near the lowest value possible with the classic KEK method. Conversely, the performance of aerogels with a density of 0.03 g cm −3 has been proven in space; they were used in the previous Micro-Particles Capturer experiment conducted by JAXA [7]. Importantly, all the 60 mass-produced aerogel tiles met the dimensional requirements for the capture panel holder.…”

Section: Limited Tile Dimensionsmentioning

confidence: 99%

“…Low-density silica aerogels have been widely used in various space experiments as cosmic dust capture me-dia [5], both in low-Earth orbits (LEOs) [6,7] and deep space [8]. The capture of cosmic dust in space involves impact between the capture medium and dust grains with a size of tens of micrometers at a hypervelocity of several kilometers per second.…”

Section: Introductionmentioning

confidence: 99%

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Ultralow-density double-layer silica aerogel fabrication for the intact capture of cosmic dust in low-Earth orbits

Tabata

Kawai

Yano

et al. 2015

J Sol-Gel Sci Technol

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The fabrication of an ultralow-density hydrophobic silica aerogel for the intact capture cosmic dust during the Tanpopo mission is described. The Tanpopo experiment performed on the International Space Station orbiting the Earth includes the collection of terrestrial and interplanetary dust samples on a silica aerogel capture medium exposed to space for later ground-based biological and chemical analyses. The key to the mission's success is the development of highperformance capture media, and the major challenge is to satisfy the mechanical requirements as a spacecraft payload while maximizing the performance for intact capture. To this end, an ultralow-density (0.01 g cm −3 ) soft aerogel was employed in combination with a relatively robust 0.03 g cm −3 aerogel. A procedure was also established for the mass production of doublelayer aerogel tiles formed with a 0.01 g cm −3 surface open-topped, box-shaped base layer, and 60 aerogel tiles were manufactured. The fabricated aerogel tiles have been demonstrated to be suitable as flight hardware with respect to both scientific and safety requirements.

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Section: Limited Tile Dimensionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ultralow-density double-layer silica aerogel fabrication for the intact capture of cosmic dust in low-Earth orbits

Tabata

Kawai

Yano

et al. 2015

J Sol-Gel Sci Technol

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show abstract

“…For low indices of refraction, aerogels with n = 1.008 (density of 0.03 g/cm 3 ) were used for capturing cosmic dust at low earth orbit in the MicroParticles Capturer (MPAC) experiment implemented by the Japan Aerospace Exploration Agency aboard the International Space Station (e.g., Ref. [7]). However, producing and handling aerogels with these low densities was difficult.…”

Section: Introductionmentioning

confidence: 99%

Progress in Development of Silica Aerogel for Particle- and Nuclear-Physics Experiments at J-PARC

Tabata

Kawai²

2015

Proceedings of the 2nd International Symposium on Science at J-Parc — Unlocking the Mysteries of Life, Matter and the Universe

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This study presents the advancement in hydrophobic silica aerogel development for use as Cherenkov radiators and muonium production targets. These devices are scheduled for use in several particleand nuclear-physics experiments that are planned in the near future at the Japan Proton Accelerator Research Complex. Our conventional method to produce aerogel tiles with an intermediate index of refraction of approximately 1.05 is extended so that we can now produce aerogel tiles with lower indices of refraction (i.e., 1.03-1.04) and higher indices of refraction (i.e., 1.075-1.08); each with excellent transparency. A new production method, called pin drying, was optimized to produce larger area aerogels consistently with an ultrahigh index of refraction (>1.10). In addition, for use as a thermal-muonium-emitting material at room temperature, dedicated low-density aerogels were fabricated using the conventional method.

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“…The N isotopic anomalies may require even more extreme conditions. One recent model showed that 15 N enrichments comparable to values in primitive Solar System materials may be produced in amines and nitriles at 10 K [134]. It has also been proposed that photochemical self-shielding of N 2 in the solar nebula led to substantial N isotopic fractionation [135].…”

Section: Ancient Organic Dustmentioning

confidence: 99%

“…Two spacecraft have also returned cosmic dust directly from their source bodies: the NASA Stardust mission to comet 81P/Wild 2 [13] and the Japanese (JAXA) Hayabusa mission to the near-Earth asteroid Itokawa [14]. An interplanetary dust collector deployed on the international space station has also been used to collect meteoroids just before impacting the Earth [15]. The study of the Stardust cometary samples is highly challenging because they are diverse, intimately mixed with aerogel (the capture medium), and have experienced varying degrees of thermal and shock alteration as a result of the impact into the dust collector at 6 km/s.…”

Section: Modern Interplanetary Dustmentioning

confidence: 99%

Dust in the Solar System: Properties and Origins

Messenger¹,

Keller²,

Nguyen³

2014

Proceedings of the Life Cycle of Dust in the Universe: Observations, Theory, and Laboratory Experiments — PoS(LCDU2013)

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A chondrule-like object captured by space-exposed aerogel on the international space station

Cited by 17 publications

References 39 publications

Ultralow-density double-layer silica aerogel fabrication for the intact capture of cosmic dust in low-Earth orbits

Ultralow-density double-layer silica aerogel fabrication for the intact capture of cosmic dust in low-Earth orbits

Progress in Development of Silica Aerogel for Particle- and Nuclear-Physics Experiments at J-PARC

Dust in the Solar System: Properties and Origins

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