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Hayabusa2’s station-keeping operation in the proximity of the asteroid Ryugu

Astrodynamics 2020年第4期4卷 349-375页

作者： Yuto Takei Takanao Saiki Yukio Yamamoto Yuya Mimasu Hiroshi Takeuchi Hitoshi Ikeda Naoko Ogawa Fuyuto Terui Go Ono Kent Yoshikawa Tadateru Takahashi Hirotaka Sawada Chikako Hirose Shota Kikuchi Atsushi Fuji Takahiro Iwata Satoru Nakazawa Masahiko Hayakawa Ryudo Tsukizaki satoshi Tanaka Masanori Matsushita Osamu Mori Daiki Koda Takanobu Shimada Masanobu Ozaki Masanao Abe satoshi hosoda Tatsuaki Okada Hajime Yano Takaaki Kato Seiji Yasuda Kota Matsushima Tetsuya Masuda Makoto Yoshikawa Yuichi Tsuda Japan Aerospace Exploration Agency Sagarmihara 252-5210Japan The Graduate University for Advanced Studies Sagarmihara 252-5210Japan NEC Aerospace Systems LtdFruchu 183-8502Japan NEC Corporation Puchu 183-8501Japan

The Japanese interplanetary probe Hayabusa2 was launched on December 3,2014 and the probe arrived at the vicinity of asteroid 162173 Ryugu on June 27,*** its 1.4 years of asteroid proximity phase,the probe successfully accomplished numbers of record-breaking achievements including two touchdowns and one artificial cratering experiment,which are highly expected to have secured surface and subsurface samples from the asteroid inside its sample container for the first time in *** Hayabusa2 spacecraft was designed not to orbit but to hover above the asteroid along the sub Earth *** orbital and geometrical configuration allows the spacecraft to utilize its high-gain antennas for telecommunication with the ground station on Earth while pointing its scientific observation and navigation sensors at the *** paper focuses on the regular station-keeping operation of Hayabusa2,which is called“home position”(HP)-keeping ***,together with the spacecraft design,an operation scheme called HP navigation(HPNAV),which includes a daily trajectory control and scientific observations as regular activities,is *** the description on the guidance,navigation,and control design as well as the framework of optical and radiometric navigation,the results of the HP-keeping operation including trajectory estimation and delta-V planning during the entire asteroid proximity phase are summarized and evaluated as a first ***,this paper states that the *** operation in the framework of HPNAV had succeeded without critical incidents,and the number of trajectory control delta-V was planned fficiently throughout the period.

关键词： small body mission station-keeping guidance,navigation,and control(GNC) optical and radiometric navigation

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High-intensity laser-driven particle and electromagnetic wave sources for science, industry, and medicine

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Frontiers of Optoelectronics 2009年第3期2卷 299-303页

作者： Akito SAGISAKA Hiroyuki DAIDO Alexander S.PIROZHKOV Michiaki MORI Akifumi YOGO Koichi OGURA satoshi ORIMO Mamiko NISHIUCHI Jinglong MA Hiromitsu KIRIYAMA Shuhei KANAZAWA Shuji KONDO Yoshiki NAKAI Takuya SHIMOMURA Manabu TANOUE Atsushi AKUTSU Hajime OKADA Tomohiro MOTOMURA Tetsuya KAWACHI Sergei V.BULANOV Timur Zh.ESIRKEPOV Shigeki NASHIMA Makoto hosoda Hideo NAGATOMO Yuji OISHI Koshichi NEMOTO Il Woo CHOI Seong Ku LEE Jongmin LEE Advanced Photon Research Center and Photo-Medical Research Center Japan Atomic Energy Agency A.M.Prokhorov Institute of General Physics Russian Academy of Sciences Moscow Institute of Physics and Technology Department of Applied Physics Graduate School and Faculty of Engineering Osaka City University Institute of Laser Engineering Osaka University Central Research Institute of Electric Power Industry Advanced Photonics Research Institute Gwangju Institute of Science and Technology

We simultaneously observed both the fast proton generation and terahertz(THz) radiation in the laser pulse interaction with a thin-foil target. The maximum proton energy of ～2.3 Me V and an intense THz radiation were observed at the pulse duration of～30 fs. We also measured the proton beam and UV harmonics from a thin-foil target by changing the laser pulse duration. In the case of the ～500 fs, peaks of UV harmonics up to fourth order appeared. This unique combination of the multiple beams will provide useful applications such as pump-probe experiments.

关键词： high-intensity laser thin-foil target plasma proton electromagnetic wave

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