ASTROD I充电模拟和干扰
ASTROD I Charging Simulation and Disturbances
摘要：
ASTROD I计划作为单一航天器飞行任务。它将在航天器和地面站之间使用干涉测量和脉冲测距技术，对描述太阳系的参数进行高精度测量，并以更高的精度测试相对论重力。航天器的核心是一个测试质量，航天器将使用无阻力控制系统跟踪测试质量。该任务关键取决于保持测试质量的测地线运动。由于宇宙射线和太阳粒子对测试质量的充电将干扰其测地线运动。我们使用GEANT 4工具包和简化的几何模型模拟了充电过程，并估计ASTROD I测试质量将以24 +/-7 e+/s的速率充电，这是由于宇宙射线质子和α粒子（3 He和4 He）在太阳极小期。我们已经使用了这个模拟的结果来估计与测试质量充电相关的干扰的大小，对于最坏的情况，考虑到模型中的不确定性和潜在的充电贡献从次要的宇宙射线组件。
英文摘要：
ASTROD I is planned as a single spacecraft mission. It will use interferometric and pulse ranging techniques between the spacecraft and ground stations, to make high precision measurements of the parameters that describe the solar system, and to test relativistic gravity with improved accuracy. At the heart of the spacecraft is a test mass, which the spacecraft will follow using a drag-free control system. The mission critically depends on maintaining the geodesic motion of the test mass. Charging of the test mass due to cosmic rays and solar particles will disturb its geodesic motion. We have modelled the charging process using the GEANT4 toolkit and a simplified, geometrical model and estimate that the ASTROD I test mass will charge positively, at a rate of 24 +/-7 e+/s, due to cosmic ray protons and alpha particles (3He and 4He) at solar minimum. We have used the results of this simulation to estimate the magnitude of disturbances associated with test mass charging, for the worst-case scenario, taking into account uncertainties in the model and potential charging contributions from minor cosmic-ray components.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
