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小田 靖久; 山口 敏和*; 小紫 公也*; 梶原 健; 高橋 幸司; 坂本 慶司
Proceedings of IEEE MTT-S International Microwave Workshop Series (IMWS) on Innovative Wireless Power Transmission (IMWS-IWPT 2011), p.181 - 184, 2011/05
Microwave Rocket is an application of atmospheric discharge in a high-power millimeter-wave (MMW) beam. Microwave Rocket is expected to be a low-cost launch to orbit system. To launch Microwave Rocket, the long distance MMW beam transmission is an important technology. Because the space-radiated beam with small beam waist expanded and its power density decreases even with short distance transmission, it is hard to provide MMW power to Microwave Rocket. Thereby the beam launcher for beam transmission is necessary to optimize the beam profile. In this study, a 10 m distance beam transmission system for a sliding thruster was designed and tested. Transmission system with the quasi-optical beam launcher and focusing mirror system enabled the thruster to obtain a straight beam of which power density is high enough for plasma ignition after long range transmission.
小松 怜史*; 福成 雅史*; 山口 敏和*; 小紫 公也*; 荒川 義博*; 小田 靖久; 坂本 慶司; 船木 一幸*
no journal, ,
In order to construct huge space infrastructures, like Space Solar Power System (SSPS), low cost space transportation systems should be applied for transportation of these infrastructures because transportation cost a will be very expensive if conventional chemical rockets are used. One of the prospective solutions is a Microwave Rocket. This rocket can use the atmospheric air as a propellant during the flight in dense atmosphere. Thrust is generated by exhaust process of the compressed air by microwave detonation. Microwave detonation is a process in which a shockwave and an ionization wave front propagate together which begins with breakdown in the air by a high power microwave beam. A key to realize Microwave Rocket transportation system is developing high performance air-breathing system. CFD calculation was conducted to get the detail information of microwave detonation. Moreover, we developed thruster with reed valves and generated impulse using gyrotron. The effect of reed valves is discussed along with the calculation result.