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.

这些研究人员的目的是研究从实验室中的极端紫外线波长区域，从真空紫外线从真空紫外线进行太阳光子溅射。 将选择冰的温度来模拟逼真的行星条件。 从天文材料表面的原子和分子溅射是许多天文环境中的传质和进化的重要过程，例如彗星，小行星，冰冷的行星，卫星，卫星，环和星际粉尘粒。 溅射的激发源是太阳光子，太阳风，磁层颗粒和微晶石。 在几个实验室中，已经进行了有关溅射的实验。 但是，太阳能光子溅射并非如此。 当前的理论和模型计算假设太阳能光子能直接转换为热量，从而控制天文材料的蒸发。 由于所需的数据不可用，因此尚未包括由于溅射而造成的质量损失。 DRS执行的实验。吴和法官应提供这些数据。