Medium-energy particle experiments—electron analyzer (MEP-e) for the exploration of energization and radiation in geospace (ERG) mission

The medium-energy particle experiments—electron analyzer onboard the exploration of energization and radiation in geospace spacecraft measures the energy and direction of each incoming electron in the energy range of 7–87 keV. The sensor covers a 2π-radian disklike field of view with 16 detectors, and the full solid angle coverage is achieved through the spacecraft’s spin motion. The electron energy is independently measured by both an electrostatic analyzer and avalanche photodiodes, enabling significant background reduction. We describe the technical approach, data output, and examples of initial observations.

[1]  David G. Sibeck,et al.  Science Objectives and Rationale for the Radiation Belt Storm Probes Mission , 2012, Space Science Reviews.

[2]  H. Kojima,et al.  Significance of Wave-Particle Interaction Analyzer for direct measurements of nonlinear wave-particle interactions , 2013 .

[3]  R. Thorne,et al.  Relativistic theory of wave‐particle resonant diffusion with application to electron acceleration in the magnetosphere , 1998 .

[4]  David C. Joy,et al.  An introduction to Monte Carlo simulations , 1991 .

[5]  S. Kasahara,et al.  High-energy electron experiments (HEP) aboard the ERG (Arase) satellite , 2018, Earth, Planets and Space.

[6]  Fuminori Tsuchiya,et al.  The Plasma Wave Experiment (PWE) on board the Arase (ERG) satellite , 2017, Earth, Planets and Space.

[7]  Y. Omura,et al.  Dynamics of high‐energy electrons interacting with whistler mode chorus emissions in the magnetosphere , 2006 .

[8]  Satoshi Yagitani,et al.  Software-type Wave–Particle Interaction Analyzer on board the Arase satellite , 2017, Earth, Planets and Space.

[9]  Atsuhiro Nishida,et al.  The Geotail Mission , 1994 .

[10]  R. Horne,et al.  Electron acceleration in the Van Allen radiation belts by fast magnetosonic waves , 2007 .

[11]  Yuto Katoh,et al.  A study of generation mechanism of VLF triggered emission by self-consistent particle code , 2006 .

[12]  Y. Omura,et al.  Self‐consistent particle simulation of whistler mode triggered emissions , 2010 .

[13]  Y. Omura,et al.  Theory and simulation of the generation of whistler‐mode chorus , 2008 .

[14]  Thomas E. Moore,et al.  Magnetospheric Multiscale Overview and Science Objectives , 2016 .

[15]  T. Mukai,et al.  The Effect of Depletion Layer Thickness in Avalanche Photodiodes for Measurement of Low-energy Electrons , 2006 .

[16]  H. Kojima,et al.  Evaluation of waveform data processing in Wave-Particle Interaction Analyzer , 2014, Earth, Planets and Space.

[17]  Y. Saito,et al.  Avalanche photodiode for measurement of low-energy electrons , 2005 .

[18]  S. Kasahara,et al.  Variability of the minimum detectable energy of an APD as an electron detector , 2012 .

[19]  T. Mukai,et al.  Cusp type electrostatic analyzer for measurements of medium energy charged particles , 2006 .

[20]  Vassilis Angelopoulos,et al.  The THEMIS Mission , 2008 .

[21]  Takashi Tanaka,et al.  Theory, modeling, and integrated studies in the Arase (ERG) project , 2018, Earth, Planets and Space.

[22]  Joseph E. Borovsky,et al.  Measurement techniques in space plasmas : particles , 1998 .

[23]  Fuminori Tsuchiya,et al.  Ground-based instruments of the PWING project to investigate dynamics of the inner magnetosphere at subauroral latitudes as a part of the ERG-ground coordinated observation network , 2017, Earth, Planets and Space.

[24]  C. P. Escoubet,et al.  CLUSTER – SCIENCE AND MISSION OVERVIEW , 1997 .

[25]  S. Kasahara,et al.  Development of an APD With Large Area and Thick Depletion Layer for Energetic Electron Measurements in Space , 2010, IEEE Transactions on Nuclear Science.

[26]  Yuto Katoh,et al.  Relativistic particle acceleration in the process of whistler‐mode chorus wave generation , 2007 .

[27]  Umran S. Inan,et al.  Wave acceleration of electrons in the Van Allen radiation belts , 2005, Nature.

[28]  S. Livi,et al.  Next‐generation solid‐state detectors for charged particle spectroscopy , 2016 .

[29]  M. F. Thomsen,et al.  Helium, Oxygen, Proton, and Electron (HOPE) Mass Spectrometer for the Radiation Belt Storm Probes Mission , 2013, Space Science Reviews.

[30]  S. Kasahara,et al.  A noise attenuation method for medium-energy electron measurements in the radiation belt , 2009 .

[32]  Charles F. Kennel,et al.  LIMIT ON STABLY TRAPPED PARTICLE FLUXES , 1966 .