Solar Cell Degradation Due to Proton Belt Enhancements During Electric Orbit Raising to GEO
Solar Cell Degradation Due to Proton Belt Enhancements During Electric Orbit Raising to GEO
复制标题
DOI：
10.1029/2019sw002213
复制
发表时间：
2019-07
期刊：
影响因子：
--
通讯作者：
Alexander R. Lozinski;R. Horne;S. Glauert;Giulio Del Zanna;D. Heynderickx;H. Evans
中科院分区：
文献类型：
--
作者：
Alexander R. Lozinski;R. Horne;S. Glauert;Giulio Del Zanna;D. Heynderickx;H. Evans
最近在地球同步卫星上采用全电力推进，通过取代化学推进剂，可以降低进入太空的成本。然而，最初将卫星送入地球静止轨道所需的时间约为200天。在此期间，卫星可能会受到捕获通量动态增加的影响，这对建模具有挑战性。为了了解这种新技术在辐射暴露方面的潜在惩罚，研究了几个关键参数对太阳能电池在电轨道提升期间退化的影响。这是通过计算一系列方法的非电离剂量随时间的累积来实现的。我们证明了在三种不同的电轨道提升场景和三种不同厚度的盖玻片下，在兆电子伏捕获质子通量的长寿命（数百天）增强期间发射引起的退化变化。结果表明，在一个活跃的环境中发射可以增加太阳能电池的退化，由于被困质子开始服务前的0.5%，与安静的环境相比。这种质子通量增强的关键能量范围是3-10 MeV（取决于屏蔽）。在不同的轨迹之间，或者当盖玻片厚度变化50 μm时，可能会发生百分之几的进一步变化。
The recent introduction of all‐electric propulsion on geosynchronous satellites enables lower‐cost access to space by replacing chemical propellant. However, the time period required to initially raise the satellite to geostationary orbit (GEO) is around 200 days. During this time the satellite can be exposed to dynamic increases in trapped flux, which are challenging to model. To understand the potential penalty of this new technique in terms of radiation exposure, the influence of several key parameters on solar cell degradation during the electric orbit raising period has been investigated. This is achieved by calculating the accumulation of nonionizing dose through time for a range of approaches. We demonstrate the changes in degradation caused by launching during a long‐lived (hundreds of days) enhancement in megaelectron volt trapped proton flux for three different electric orbit raising scenarios and three different thicknesses of coverglass. Results show that launching in an active environment can increase solar cell degradation due to trapped protons by ∼5% before start of service compared with a quiet environment. The crucial energy range for such enhancements in proton flux is 3–10 MeV (depending on shielding). Further changes of a few percent can occur between different trajectories, or when a 50‐μm change in coverglass thickness is applied.