Study of Photon Sputtering of H2O Ices Under In-Situ Conditions

原位条件下水冰的光子溅射研究

• 批准号: 9115670
• 负责人: Chung-Yung Wu
• 金额: $ 19.35万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-03-15 至 1995-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9115670&HistoricalAwards=false
• 关键词: Study; Photon; Sputtering; H2O; Ices

The goal of these researchers is to study solar photon sputtering of molecular water ices from the vacuum ultraviolet through the extreme ultraviolet wavelength region in the laboratory. The temperatures for the ices will be chosen to simulate realistic planetary conditions. Sputtering of atoms and molecules from surfaces of astronomical materials is an important process for mass transfer and evolution in a number of astronomical environments, such as comets, asteroids, icy planets, satellites, rings, and interstellar dust grains. The excitation sources for sputtering are solar photons, solar wind, magnetospheric particles, and micrometeorites. Experiments on sputtering by energetic ions have been carried out in several laboratories. However, this is not the case for solar photon sputtering. Current theories and model calculations assume that the solar photon energies are directly converted into heat which controls the vaporization of the astronomical material. Mass loss due to sputtering has not been included since the required data are not available. The experiments performed by Drs. Wu and Judge should supply those data.

这些研究人员的目标是研究太阳光子溅射 从真空紫外线穿过 在实验室中的极紫外线波长区域。 的 冰的温度将被选择为模拟现实的 行星条件 天体表面原子和分子的溅射 材料是一个重要的传质和演化过程 在许多天文环境中，比如彗星， 小行星、冰冷的行星、卫星、星环和星际尘埃 晶粒 溅射的激发源是太阳光子， 太阳风、磁层粒子和微陨石。 进行了高能离子溅射实验 在几个实验室。 然而，太阳能的情况并非如此。 光子溅射 目前的理论和模型计算假设 太阳光子能量直接转化为热能 控制着天文物质的蒸发 质量 由于溅射造成的损失没有包括在内， 没有数据。 吴博士进行的实验和 法官应该提供这些数据。