Expectations for continuous miniaturization in mass spectrometry are not declining for years.
Portable instruments are highly welcome by the industry, science, space agencies, forensic …

This paper presents the highlights of joint observations of the inner magnetosphere by the
Arase spacecraft, the Van Allen Probes spacecraft, and ground-based experiments …

The Exploration of energization and Radiation in Geospace (ERG) project aims to study
acceleration and loss mechanisms of relativistic electrons around the Earth. The Arase …

The Exploration of energization and Radiation in Geospace (ERG) project explores the
acceleration, transport, and loss of relativistic electrons in the radiation belts and the …

Both solar wind and ionospheric sources contribute to the magnetotail plasma sheet, but
how their contribution changes during a geomagnetic storm is an open question. The source …

Energy circulation in geospace lies at the heart of space weather research. In the inner
magnetosphere, the steep plasmapause boundary separates the cold dense plasmasphere …

Using a novel wave-particle interaction analysis, we show observational evidence of energy
transfer from fast magnetosonic waves (MSWs) to low-energy protons in the magnetosphere …

We performed a statistical study of electromagnetic ion cyclotron (EMIC) wave distributions
and their coupling with energetic protons in the inner magnetosphere using the Arase …

The demonstrative space plasma physics communities in the world have been conducting
intensive research and development activities for instrument miniaturization because …

In this report, we describe the low-energy electron instrument LEPe (low-energy particle
experiments–electron analyzer) onboard the Arase (ERG) spacecraft. The instrument …