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太陽発電とGHz級振動子によるマイクロ波セイル
https://jaxa.repo.nii.ac.jp/records/8157
https://jaxa.repo.nii.ac.jp/records/815768f98c86-a0d3-4e72-a0b9-7168223f0929
Item type | 会議発表論文 / Conference Paper(1) | |||||
---|---|---|---|---|---|---|
公開日 | 2015-03-26 | |||||
タイトル | ||||||
タイトル | 太陽発電とGHz級振動子によるマイクロ波セイル | |||||
言語 | ||||||
言語 | jpn | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | ソーラーセイル | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 太陽エネルギー | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | マイクロウエーブセイル | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | セイル加速 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 水晶共振機 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 光学特性 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 宇宙探査機 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 高温 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | レーザービーム | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 研究開発 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | エミッタンス | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 反射率 | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | solar sail | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | solar energy | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | microwave sail | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | sail acceleration | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | quartz resonator | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | optical property | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | space probe | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | high temperature | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | laser beam | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | research and development | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | emittance | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | reflectance | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_5794 | |||||
資源タイプ | conference paper | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
その他のタイトル(英) | ||||||
その他のタイトル | Microwave beam-driven sail powered by solar energy with quartz resonators in GHz primary frequency | |||||
著者 |
今仁, 和武
× 今仁, 和武× Imani, Kazutake |
|||||
著者所属 | ||||||
日本ハイテク研究所 | ||||||
著者所属(英) | ||||||
en | ||||||
Japan HiTec Laboratory | ||||||
出版者 | ||||||
出版者 | 宇宙科学研究所 | |||||
出版者(英) | ||||||
出版者 | The Institute of Space and Astronautical Science (ISAS) | |||||
書誌情報 |
第22回宇宙エネルギーシンポジウム 平成14年度 en : The 22nd ISAS Space Energy Symposium March 12, 2003 p. 31-35, 発行日 2003-05 |
|||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | In order to drive space probes at high speed around solar system, interstellar region and the nearby stars, photon driven sails have been studied to develop solar light sail, laser and microwave sails. The sail acceleration a, which speed is to be near light speed at high temperature, is a function of the temperature T(K), area mass M(kg/sq m) and optical properties (emittance epsilon, reflectance rho and absorptance alpha), namely, a = 2.27 x 10(exp -15) epsilon(rho + 1)/alpha T(exp 4)/M. The temperature of solar sail, which is driven by concentrated solar beam from three reflectors at the Earth or Lagrange point, becomes approximately 180 C, and aluminum alloy reflector can be used. The temperature of laser sail driven by the laser beam on the rear surface of the moon becomes over 1,000 C, and the relatively smaller sail of deep space probes should be made of carbon fiber which is ion-plated by platinum. Nagaura Laboratory developed a new manufacturing process of quartz resonators featuring to make two-steps concave parts on the surface of the piezoelectric blank by using the conventional chemical etching method as the first step and making thinner typically 7 micrometers on another surface of the blank by the reactive ion etching as the second step. The typical reactance-frequency diagram of AE cut is measured that the primary resonance is approximated 212 MHz with the negligible spurious peaks. As the fundamental frequency is inversely proportional to the quartz thickness, thinner device as 1.5 micrometer will resonate near 1 GHz. The solar energy can be converted to electricity by thermal cycle generator or photovoltaic cell. The current solar cell array will be available for microwave beam tube transmitter with stacks of Magnetrons and TWT amplifiers in high conversion efficiency over 50 percent. For a required power density on axis of I, with transmitter diameter d, transmitter power P, microwave wavelength lambda, a maximum usable range of x is obtained to be x = 0.46 d/lambda times the square root of p/I. As the practical frequency for microwave devices is about 10 GHz (0.03 m), the beam intensity of 10 kW/sq m will be got by 1 km antenna with 1 GW transmitter at 5,000 km. When the microwave beam can be concentrated, the sail acceleration is approximately 1 gee, and the space probe will approach light speed in one year. | |||||
資料番号 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 資料番号: AA0045915007 |