A5003154505- Planetary Science and Exploration
- Astro and Planetary Science
- Spaceflight effects on biology
- Spacecraft and Cryogenic Technologies
- Gas Dynamics and Kinetic Theory
- Space Science and Extraterrestrial Life
- Aerogels and thermal insulation
- High-pressure geophysics and materials
- Space Satellite Systems and Control
- High-Velocity Impact and Material Behavior
- Methane Hydrates and Related Phenomena
- Geology and Paleoclimatology Research
- Astrophysics and Star Formation Studies
- Lattice Boltzmann Simulation Studies
- Solar and Space Plasma Dynamics
- Aerospace Engineering and Energy Systems
- Vehicle emissions and performance
- Spacecraft Design and Technology
- Isotope Analysis in Ecology
- Space exploration and regulation
- Geomagnetism and Paleomagnetism Studies
- Atmospheric chemistry and aerosols
- Particle Dynamics in Fluid Flows
- Recycling and Waste Management Techniques
- Educational Robotics and Engineering
University of Aizu
2009-2025
Japan Aerospace Exploration Agency
2004-2024
Institute of Space and Astronautical Science
2004-2024
The Graduate University for Advanced Studies, SOKENDAI
2004-2007
Lawrence Livermore National Laboratory
2006
United States Naval Research Laboratory
2006
Brookhaven National Laboratory
2006
University of California, Berkeley
2006
University of Washington
2006
Johnson Space Center
2006
The bulk of the comet 81P/Wild 2 (hereafter Wild 2) samples returned to Earth by Stardust spacecraft appear be weakly constructed mixtures nanometer-scale grains, with occasional much larger (over 1 micrometer) ferromagnesian silicates, Fe-Ni sulfides, metal, and accessory phases. very wide range olivine low-Ca pyroxene compositions in requires a formation conditions, probably reflecting different locations protoplanetary disk. restricted compositional ranges for absence hydrous phases...
Imminent robotic and human activities on the Moon other planetary bodies would benefit from advanced in situ Computer Vision Machine Learning capabilities to identify quantify microparticle terrestrial contaminants, lunar regolith disturbances, flux of interplanetary dust particles, possible interstellar dust, β-meteoroids, secondary impact ejecta. The YOLO-ET (ExtraTerrestrial) algorithm, an innovation this field, fine-tunes Tiny-YOLO specifically address these challenges. Designed for...
Abstract— Outside the Earth's atmosphere, silica aerogel is one of best materials to capture finegrained extraterrestrial particles in impacts at hypervelocities. Because a superior insulator, captured grains are inevitably influenced by frictional heat. Therefore, we performed laboratory simulations hypervelocity using light‐gas guns impact into aerogels powders serpentine, cronstedtite, and Murchison CM2 meteorite. The samples were shot >6 km s −1 similar flyby speed comet P/Wild‐2...
Abstract The Tanpopo experiment is Japan's first astrobiology mission aboard the Japanese Experiment Module Exposed Facility on International Space Station. Tanpopo‐1 exposed silica aerogel panels to low Earth orbit from 2015 2016 capture micrometeoroids. We identified an impact track measuring approximately 8 mm long, which contained terminal grains in panel oriented toward space. exhibited a bulbous cavity with two thin, straight tracks branching it, each preserving grain at their ends....
New production methods of silica aerogel with high and low refractive indices have been developed. A very slow shrinkage alcogel at room temperature has made possible producing up to 1.265 without cracks. Even higher than 1.08, the transmission length obtained from this technique measured be about 10 20 mm 400 nm wave length. mold which endures in supercritical drying process provided extremely density 0.009 g/cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...
A large number of cometary dust particles were captured with low-density silica aerogel during the NASA Stardust mission. The penetrated into and formed various track shapes. To estimate properties particles, such as density size, based on morphology tracks, we carried out systematic experiments testing impacts at 6 km s−1 using projectiles sizes densities. We found that maximum diameter ratio length to in are good indicators projectile size density, respectively. Based these results,...
The Tanpopo experiment was the first Japanese astrobiology mission on board International Space Station. It included exposure experiments of microbes and organic compounds as well a capture hypervelocity impacting microparticles. We deployed three Exposure Panels, each consisting 20 Units that contained microbes, compounds, an alanine UV dosimeter or ionizing radiation dosimeter. Panels were situated zenith face Exposed Experiment Handrail Attachment Mechanism (ExHAM) pointing in direction...
Tanpopo, dandelion, is the name of a grass whose seeds with floss are spread by wind. We propose analyses interplanetary migration microbes, organic compounds and meteoroids on Japan Experimental Module (JEM) International Space Station (ISS). In this paper we will introduce target basic design project.In "Tanpopo" project, ultra low-density aerogel be used to capture micrometeoroid debris. Particles captured for several after initial inspection gel tracks. Careful analysis tracks in provide...
We are developing a silica-aerogel-based cosmic dust collector for use in the Tanpopo experiment to be conducted on International Space Station. The mass production of simple two-layer hydrophobic aerogels was undertaken contamination-controlled environment, yielding more than 100 undamaged products. collector, comprising an aerogel tile and holder panel, designed resist launch vibration conform exposure attachment. To this end, box-framing with inner outer densities 0.01 0.03 g/cm3,...
TANPOPO, dandelion, is the name of a grass whose seeds with floss are spread by wind. We propose analyses interplanetary migration microbes, organic compounds and meteoroids on ISS-JEM. Ultra low density aerogel will be used to capture micrometeoroid debris. Particles captured for several after initial inspection gel tracks. Careful analysis tracks in provide size velocity dependence debris flux. The particles analyzed mineralogical, microbiological characteristics. To test survival microbes...
The Tanpopo mission is an astrobiology space experiment at the Japanese Experiment Module (JEM) 'Kibo' on International Space Station (ISS). One of sub-divided themes for intact capture organic bearing micrometeoroids in low Earth orbit using ultralow density silica aerogel (0.01 g/cm3). In order to evaluate damage matter during hyper velocity impacts into aerogel, Murchison meteorite powdered samples, analogs micrometeoroids, were fired flight-grade g/cm3) a two-stage light-gas gun with...
†† Heating tests of silica aerogel are carried out in an arcjet wind tunnel facility order to examine whether it is suitable for the sample collector material used Mars Aeroflyby Sample Collection mission. After heating tests, surface test piece visually inspected by using a digital microscope. Considerabel alterations observed on surface. The has become black, and many crevices have developed along In addition, seems hard due glassy material. confirm that such damaged plays role collector,...
A Mars Aero-flyby Sample Collection (MASC) mission has been proposed in a exploration project at Japan Aerospace Exploration Agency (JAXA). The MASC vehicle enters the Martian atmosphere, captures dust particles and atmospheric gases sampling altitudes between 30 50 km, returns back to Earth. In order improve feasibility of this project, development its system during flying dusty atmosphere is crucial. Since silica aerogel used as capturing medium for micrometeoroids space debris, it also...
New sample collector system is proposed for the return mission on Mars under consideration in JAXA. The new consists of silica aerogels and carbon to compensate each other their unique characteristics. In order demonstrate concept verify technical difficulties, several experiments are conducted this study. Heating tests carried out see whether can be applied aerodynamic heating environment. From tests, no significant difference observed between before after heating. Unlike aerogels, surface...
A Mars Aero-flyby Sample Collection (MASC) mission has been proposed lately at Japan Aerospace Exploration Agency (JAXA). In order to improve the feasibility of this mission, development its sampling system during flying in Martian dusty atmosphere capture floating micron-sized dust particles is crucial. Since aerogel used as a capturing medium for micrometeoroids and space debris, it also planned be MASC mission. utilize hypervelocity atmospheric flight, several unknown effects, such...