Proposed Secondary electron emission and photoelectron emission measurements related to engineering design optimization guidelines and spacecraft charging

摘要

The key parameters in modeling spacecraft charging are the secondary electron emission (SEE) coefficient and photoelectron emission (PE) coefficient of metals and insulating materials. This work is focused on the analysis and measurement of SEE and PE. A review is presented of methods to measure SEE and PE -including the using SEM with short-pulsed electron for accelerating voltage of 600V-5kV, a vacuum chamber with a low energy electron beam for accelerating voltage 100V-2kV, a measurement system of photo-electron emission, and a photoelectron emission image by vacuum ultraviolet light (VUV). This review is based on joint studies conducted for Japan Aerospace Exploration Agency (JAXA) at High Energy Accelerator Research Organization (KEK), at Musashi Institute of Technology and at Saitama University to investigate the relation to spacecraft charging. This report summarizes some typical measurement results after briefly explaining the measurement project.