Electron Beam Enabled Surface Composition, Charge, and Adsorbed Gas Determination
The Human Exploration and Development of Space Roadmap calls for Human Missions to Mars and other planets in the 2010 to 2023 timeframe.
Engineering topics
Publications and source records attributed to Wilcox, J..
The Human Exploration and Development of Space Roadmap calls for Human Missions to Mars and other planets in the 2010 to 2023 timeframe.
The development of a portable surface elemental analysis tool based on the excitation of characteristics x-rays at ambient pressure with an electron beam is described.
This paper reports on measurements that demonstrate that oxygen absorbed on clean polycrystalline Fe films can produce an excess current noise. The noise is indicative of dynamic processes occurring in the surface region of the film. We propose that the noise results from the dynamics of a reversible reaction between absorbed states. The measurements are accurately modeled with a single correlation time implying that surface heterogeneity is not important to the reaction. In addition to offering promise for future states of solid-state surface reactions, these measurements also have implications for the origin of 1/f current noise in conductors.
Solar variability influences upon terrestrial weather and climate are addressed. Both the positive and negative findings are included and specific predictions, areas of further study, and recommendations listed.