Masayuki Niino

TL;DR: In this article, a low-melting alloy is used as a filler to fill the grooves in the outer side of a rocket combustor. But the inner cylinder is formed by forming a Cu plating shell on the periphery of the inner cylin.

TL;DR: In this paper, a new insight to laser plasma interactions and/or new mechanism of laser thrust generation was given, and experimental results and physical insights were presented as to propelled mass and velocity dependence on laser energy and temporal behavior of impulse generation, as well as enhancement of impact generation over the conventional ablation scheme.

TL;DR: In this article, the laser conditions for producing efficient thrust on debris were discussed and the results of momentum coupling coefficients measured with ps and ns pulse duration were presented, where it was suggested that this minimization can be achieved by using ultrashort pulse interactions where laser pulse duration is too short for thermal conduction to take place deep into debris.

TL;DR: The concept of the Laser Energy NETwork (LE-NET) and the multi-purpose laser propulsion system being studied at NAL are overviewed in this article, where the SEL is expected to minimize the SPS weight considerably, leading low-cost realization of the LE-NET.

TL;DR: The Japanese activity of the laser application in space is reviewed and the target is to realize the low cost space transportation system using laser ablation, which can be reduced to less than one twenty-fifth of the current cost.