Background in channel electron multiplier detectors due to penetrating radiation in space
Background in channel electron multiplier detectors due to penetrating radiation in space
复制标题
空间穿透辐射导致通道电子倍增器探测器的背景
DOI：
10.1109/tns.2006.874497
复制
发表时间：
2006
影响因子：
1.8
通讯作者：
H. Funsten
中科院分区：
文献类型：
--
作者：
E. MacDonald;M. F. Thomsen;H. Funsten
地球空间环境中的穿透辐射可以在空间仪器上使用的电子倍增器探测器中产生实质性的背景。计算了地球同步轨道上LANL卫星的磁层等离子体分析仪的背景计数率，并将其与周围穿透粒子辐射环境进行了比较，以便为估计和预测整个磁层的探测器背景计数率奠定基础。对于几个太阳高能质子事件和相对论电子事件，结果表明，在大气压上无屏蔽的沟道电子倍增器(CEM)探测器中的本底计数与大于50 MeV质子或大于1.1 MeV电子的通量高度相关。用于表征穿透辐射的高能质子和电子测量分别来自GOES卫星上的EPS仪器和LANL卫星上的SOPA仪器。这些事件期间地球同步轨道上的高能谱可以与AP/AE-8内磁层通量模型相比较。根据CEM背景与地球同步轨道环境穿透辐射之间的相关性，我们推断了背景对内磁层的响应，这是未来前往该地区执行任务的高度相关的仪器设计参数。
Penetrating radiation in the Earth's space environment can induce substantial backgrounds in electron multiplier detectors used on space instruments. Background count rates from the Magnetospheric Plasma Analyzer (MPA) on LANL satellites in geosynchronous orbit are calculated and compared to the ambient penetrating particle radiation environment to develop a basis for estimating and predicting detector background count rates throughout the magnetosphere. For several solar energetic proton events and, separately, relativistic electron events, it is shown that background counts in the largely unshielded channel electron multiplier (CEM) detectors on MPA are highly correlated with fluxes of greater than 50 MeV protons or greater than 1.1 MeV electrons. The energetic proton and electron measurements used to characterize the penetrating radiation come from the EPS instrument on the GOES satellites and the SOPA instrument on the LANL satellites, respectively. The high-energy spectrum at geosynchronous orbit during these events can be compared with the AP/AE-8 models of the inner magnetosphere fluxes. Based on the correlation between CEM background and ambient penetrating radiation at geosynchronous, we extrapolate the background response to the inner magnetosphere, a highly relevant instrument design parameter for future missions to this region.