ERG Science Center

Extremely High-Energy Electron Experiment, XEP

Measurement Principle

XEP consists of five SSDs for a lower energy range and one scintillator (GSO+PMT) for a higher energy range. XEP also has an anti-scintillator to eliminate contamination from sides.

Members

PI: Nana Higashio (JAXA/RDD)
Co-PI: Haruhisa Matsumoto (JAXA/RDD)

Instrument Specifications

Energy range	Electron from 400 keV to 20 MeV
G-factor	0.0088 cm²sr
Angular resolution	20° × 22.5°
Energy resolution	SSDs: <20% GSOZ: <50-60%
Size	317 mm × 250 mm × 174 mm
Weight	5281 g
Power	19.8 W
Data format	Table mode (18 ch) - 12 ch: SSD SUM; 4 ch: GSO List mode (for S-WPIA) Quasi-real time data (for space weather)

References

Higashio, N., T. Takashima, I. Shinohara, and H. Matsumoto, The extremely high-energy electron experiment (XEP) onboard the Arase (ERG) satellite, Earth, Planets and Space, 10.1186/s40623-018-0901-x, 2018.

Link

About this page

The ERG (Exploration of energization and Radiation in Geospace) project is a mission to elucidate acceleration and loss mechanisms of relativistic electrons around Earth during geospace storms. The project consists of the satellite observation team, the ground-based network observation team, and the integrated data analysis/simulation team.

The ERG Science Center is operated by Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA) and Institute for Space-Earth Environmental Research (ISEE), Nagoya University as a Joint Research Center for Space Science. The science center archives data related to the ERG project, releases the data to the public, develops integrated analysis tools for the data, and promotes studies related to the ERG project.