A5013454935- Space Satellite Systems and Control
- Plasma Diagnostics and Applications
- Ionosphere and magnetosphere dynamics
- Electron and X-Ray Spectroscopy Techniques
- High-Velocity Impact and Material Behavior
- Planetary Science and Exploration
- Electromagnetic Launch and Propulsion Technology
- Radiation Effects in Electronics
- Spacecraft Design and Technology
- High voltage insulation and dielectric phenomena
- Transportation Safety and Impact Analysis
- Electrostatic Discharge in Electronics
- Analytical Chemistry and Sensors
- Energetic Materials and Combustion
- Spacecraft and Cryogenic Technologies
- Advanced Battery Technologies Research
- Solar and Space Plasma Dynamics
- Photocathodes and Microchannel Plates
- Astro and Planetary Science
- Semiconductor materials and devices
- Space exploration and regulation
- Rocket and propulsion systems research
- Silicone and Siloxane Chemistry
- Graphite, nuclear technology, radiation studies
- Advancements in Battery Materials
Japan Aerospace Exploration Agency
2008-2024
Tsukuba Medical Center Hospital
2022
Toranomon Hospital
2022
Institute of Space and Astronautical Science
2015-2018
High Energy Accelerator Research Organization
2009
Institute of Electrical Engineering
2009
Japan Women's University
2003
Covers advancements in spacecraft and tactical strategic missile systems, including subsystem design application, mission analysis, materials structures, developments space sciences, processing manufacturing, operations, applications of technologies to other fields.
The exploration of energization and radiation in geospace (ERG) satellite, nicknamed "Arase," is the second satellite a series small scientific satellites created by Institute Space Astronautical Science Japan Aerospace Exploration Agency. It was launched on December 20, 2016, Epsilon launch vehicle. purpose ERG project to investigate how high-energy (over MeV) electrons belts surrounding Earth are generated lost monitoring interactions between plasma waves electrically charged particles. To...
Covers advancements in spacecraft and tactical strategic missile systems, including subsystem design application, mission analysis, materials structures, developments space sciences, processing manufacturing, operations, applications of technologies to other fields.
We investigated the effect of hypervelocity impacts micrometeoroids and small-scale orbital space debris (M/OD) on structures by comparing numerical simulation results obtained using AUTODYN-2D hydrocode with experiments a two- stage light gas gun. The response an aluminum honeycomb structure to 6 km/s high-velocity is shown discussed. AUTODYN-2D, which used for impact analysis complex physical systems including fluid solid materials, was simulate at 2–15 km/s. Material models in allow...
We studied how to measure the secondary electron emission (SEE) of metal and insulating materials used for satellite thermal insulation or other such purposes. The SEE yields measurement is very important analyzing charge accumulation on surfaces due space environment because irradiated electrons influences amount surface charge. Therefore, we tried yields. To SEE, an improved scanning microscope (SEM) system that has a beam-blanking unit Faraday cup. From this system, can obtain...
We compared numerical simulation results obtained using AUTODYN-3D, which is used for impact analysis of complex physical systems including fluid and solid materials, with experimental a two-stage light gas gun. The response electric power supply cable harnesses subjected to high-velocity at 4.01 km/s shown discussed. In addition, AUTODYN-3D was applied the hypervelocity micrometeoroids space debris (M/OD) 15 20 km/s, respectively. Material models in are also discussed investigated order...
Small particles of less than 0.5 mm diameter collide with spacecraft solar panels, which work as an electrical power supply. Sustained arc discharging does not occur during such impacts, although trigger discharges are generated several hundreds milliseconds. The performance the panels is degraded slightly, but enough to affect satellite systems.
This paper describes the study framework for material property measurements related to spacecraft charging, methods, and measurement results. report introduces a summary of some typical results following brief explanation project.
Flashover discharge on the solar array is an issue of spacecraft charging, because potentially causes catastrophic failure a satellite. The experiment has been carried out to investigate propagation area flash-over discharge. During discharge, neutralization current flows strings. charge was calculated relationship between and distance from cathode spot. result in maximum plasma 3m simulated geostationary orbit.
This paper reported the surface and volume resistivity of typical insulators under atmospheric condition vacuum condition. The measured materials are some kinds alumina ceramics which have different purity Al2O3 component. It was confirmed that for almost all insulator higher than In addition, we checked dependence on ambient pressure from to medium Desorption moisture vapor would be main cause increase in vacuum. On other hand, had little change between
We studied how to measure the secondary electron emission (SEE) of metal and insulating materials used for satellite thermal insulation or other such purposes. SEE yield measurement is very important analyzing charge accumulation on surfaces due space environment because irradiated electrons influences amount surface charge. Therefore, we tried yield. To SEE, an improved SEM system that has a beam blanking unit Faraday cup. From this system, can obtain characteristics from by with energy...
We studied the measurement of secondary electron emission (SEE) metal and insulating materials used for satellite thermal insulation or other such purposes. The SEE yield is very important analyzing charge accumulation on surfaces in a space environment because related to irradiated electrons influences amount surface charge. considered degradation phenomena spacecraft caused by radioactive rays. Those yields might change nondegradation sample. measured that are treated using process. In...
We studied measurement of secondary electron emission (SEE) metal and insulating materials used for satellite thermal insulation or other such purposes. The SEE yield is very important analyzing charge accumulation on surfaces a space environment because related to irradiated electrons influences the amount surface charge. Therefore, we tried measure yield. Furthermore, must consider degradation phenomena spacecraft caused by radioactive rays. According materials, those yields might change...
Solar panel failure is putatively caused by electrostatic charge and discharge. An investigation of its causes efforts to determine measures for the future require both verification under as realistic a space environment possible enhanced ground tests. A plasma chamber was developed at Tsukuba Space Center carry out charge/discharge tests verify low-Earth-orbit satellites solar durability against discharge (ESD). This paper describes results ESD extremely low temperatures. The primary arc...
We investigated the effect of hypervelocity impacts micrometeoroids and small-scale orbital space debris (M/OD) on structures by comparing numerical simulation results obtained using AUTODYN-3D hydrocode with experiments a two-stage light gas gun. compared simulations experimental response Wire Probe anTenna (WPT) wire subjected to high-velocity impacts. show WPT from 2 km/s up 15 km/s. also verified Ballistic limit curve is shown downside line.
Abstract A considerable amount of aluminum oxide particles are generally produced during the Solid Rocket Motor (SRM) combustion. project determining damage caused by slag impact on spacecrafts in orbit is drafted to acquire physical property data SRM JAXA. After grand firing test small SRMs, all was collected and analyzed. This study describes investigation results regarding characteristics current possible scenario particle formation process.