低軌道宇宙環境下での材料曝露試験高度化のための原子状酸素収束化技術の開発

抄録

Atomic oxygen concentrator is developed in order to achieve acceleration tests of atomic oxygen exposures in low Earth orbit (LEO). A ``mufti ring-type'' atomic oxygen concentrator is designed with a computer simulation using the Hard Cube Model. It is made clear that the theoretical concentration factor of atomic oxygen is expected to be 64, however the experimental value is restricted to be approximately 9. The primary factor for limiting the concentration factor is considered to be a gas build-up near the focal point. In the ground test using a laser detonation source like this study, which gives an intense atomic oxygen beam pulse within 30 μs, the concentration factor is limited by the recombination reaction of atomic oxygen in the beam pulse. However, this is not a case in the real LEO space environment. It is expected that the ``multiple ring-type'' concentrator can be expected the concentration factor over 40 in LEO.