PEACE electron spectrometer

The Plasma Electron And Current Experiment (PEACE) instrument is designed to measure the electron velocity distribution in the vicinity of its host spacecraft, covering an energy range of ~1 eV to ~26 keV and detecting electrons arriving from all possible directions. Each PEACE instrument has two sensor heads, LEEA and HEEA, which are mounted on opposite sides of the spacecraft such that the instantaneous field of view of one is the same as that seen by the other half a spacecraft rotation period later. LEEA and HEEA differ only in geometric factor (HEEA admits more electrons than LEEA when measuring the same energy range). Both sensors sample 4*pi steradians per spin.All PEACE datasets are available on the ESA Cluster Science Archive at https://csa.esac.esa.int/

等离子体电子与电流实验（PEACE）仪器旨在测量其母航天器附近电子速度分布，涵盖能量范围约为1电子伏特至26千电子伏特，并能够检测来自所有可能方向的电子。每台PEACE仪器配备两个传感器头，即李氏电子能量分析仪（LEE A）和亥氏电子能量分析仪（HEEA），它们分别安装在航天器的对立两侧，使得一个传感器的瞬时视场在航天器旋转半周期后与另一个传感器所见相同。李氏电子能量分析仪与亥氏电子能量分析仪在几何因子上存在差异（在测量相同能量范围时，亥氏电子能量分析仪比李氏电子能量分析仪能够检测到更多的电子）。两个传感器均在每个自转周期内采样4π球面立体角。所有PEACE数据集均可在欧洲空间局（ESA）集群科学档案库中获取，访问地址为https://csa.esac.esa.int/。