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

Earth, Planets and Space - Tập 70 - Trang 1-16 - 2018
Satoshi Kasahara1, Shoichiro Yokota2, Takefumi Mitani3, Kazushi Asamura3, Masafumi Hirahara4, Yasuko Shibano3, Takeshi Takashima3
1Department of Earth and Planetary Science, School of Science, The University of Tokyo, Tokyo, Japan
2Osaka University, Toyonaka, Japan
3Institute of Space and Astronautical Science, Sagamihara, Japan
4Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, Japan

Tóm tắt

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.

Tài liệu tham khảo

Angelopoulos V (2008) The THEMIS mission. Space Sci Rev 141(1):5. https://doi.org/10.1007/s11214-008-9336-1 Asamura K, et al (2017) Observations of low-energy ions with Arase/LEPi, In: American Geophysical Union fall meeting Burch JL, Moore TE, Torbert RB, Giles BL (2016) Magnetospheric multiscale overview and science objectives. Space Sci Rev 199(1):5–21. https://doi.org/10.1007/s11214-015-0164-9 Carlson CW, McFadden JP (2013) Design and application of imaging plasma instruments. In: Pfaff RF, Borovsky JE, Young DT (eds) Measurement techniques in space plasmas: particles. American Geophysical Union, Washington DC, pp 125–140. https://doi.org/10.1029/GM102p0125 Escoubet CP, Schmidt R, Goldstein ML (1997) Cluster – science and mission overview. Space Sci Rev 79(1):11–32. https://doi.org/10.1023/A:1004923124586 Funsten HO, Skoug RM, Guthrie AA, MacDonald EA, Baldonado JR, Harper RW, Henderson KC, Kihara KH, Lake JE, Larsen BA, Puckett AD, Vigil VJ, Friedel RH, Henderson MG, Niehof JT, Reeves GD, Thomsen MF, Hanley JJ, George DE, Jahn J-M, Cortinas S, De Los Santos A, Dunn G, Edlund E, Ferris M, Freeman M, Maple M, Nunez C, Taylor T, Toczynski W, Urdiales C, Spence HE, Cravens JA, Suther LL, Chen J (2013) Helium, oxygen, proton, and electron (HOPE) mass spectrometer for the radiation belt storm probes mission. Space Sci Rev 179:423–484 Higashio N, et al (2017) Energy dependence of relativistic electron variations in the outer radiation belt during the recovery phase of magnetic storms: Arase/XEP observation. In: American Geophysical Union fall meeting Hikishima M, Omura Y, Summers D (2010) Self-consistent particle simulation of whistler mode triggered emissions. J Geophys Res Space Phys 115(A12):A12246. https://doi.org/10.1029/2010JA015860 Hikishima M, Katoh Y, Kojima H (2014) Evaluation of waveform data processing in wave-particle interaction analyzer. Earth Planets Space 66(1):63. https://doi.org/10.1186/1880-5981-66-63 Horne RB, Thorne RM, Shprits YY, Meredith NP, Glauert SA, Smith AJ, Kanekal SG, Baker DN, Engebretson MJ, Posch JL, Spasojevic M, Inan US, Pickett JS, Decreau PME (2005) Wave acceleration of electrons in the Van Allen radiation belts. Nature 437:227–230 Horne RB, Thorne RM, Glauert SA, Meredith NP, Pokhotelov D (2007) Santol´ık, O.: Electron acceleration in the Van Allen radiation belts by fast magnetosonic waves. Geophys Res Lett 34(17):L17107. https://doi.org/10.1029/2007GL030267 Joy DC (1991) An introduction to Monte Carlo simulations. Scanning Microsc 5:329–337 Kasahara S, Asamura K, Saito Y, Takashima T, Hirahara M, Mukai T (2006) Cusp type electrostatic analyser for measurements of medium energy charged particles. Rev Sci Instrum 77:123303 Kasahara S, Asamura K, Ogasawara K, Kazama Y, Takashima T, Hirahara M, Saito Y (2009) A noise attenuation method for the medium-energy electron measurements in the radiation belt. Adv Space Res 43(5):792–801 Kasahara S, Takashima T, Asamura K, Mitani T (2010) Development of an APD with large area and thick depletion layer for energetic electron measurements in space. IEEE Trans Nucl Sci 57(3):841–847 Kasahara S, Takashima T, Hirahara M (2012) Variability of the minimum detectable energy of an APD as an electron detector. Nuclear Inst Methods Phys Res A 664(1):282–288 Kasahara Y et al (2017) The plasma wave experiment (PWE) on board the Arase (ERG) satellite initial results and collaboration with the ground network stations and Van Allen Probes. In: American Geophysical Union fall meeting Katoh Y, Omura Y (2006) A study of generation mechanism of VLF triggered emission by self-consistent particle code. J Geophys Res 111:12207 Katoh Y, Omura Y (2007) Relativistic particle acceleration in the process of whistler-mode chorus wave generation. Geophys Res Lett 34(13):L13102. https://doi.org/10.1029/2007GL029758 Katoh Y, Kitahara M, Kojima H, Omura Y, Kasahara S, Hirahara M, Miyoshi Y, Seki K, Asamura K, Takashima T, Ono T (2013) Significance of wave-particle interaction analyzer for direct measurements of nonlinear wave-particle interactions. Ann Geophys 31(3):503–512. https://doi.org/10.5194/angeo-31-503-2013 Katoh Y et al (2018) Software-type Wave-Particle Interaction Analyzer on board the Arase satellite. Earth Planets Space 70:4. https://doi.org/10.1186/s40623-017-0771-7 Kennel CF, Petchek HE (1966) Limit on stably trapped particle fluxes. J Geophys Res 71:1–28 Mauk BH, Fox NJ, Kanekal SG, Kessel RL, Sibeck DG, Ukhorskiy A (2013) Science objectives and rationale for the radiation belt storm probes mission. Space Sci Rev 179(1):3–27. https://doi.org/10.1007/s11214-012-9908-y Mitani T, et al (2017) “High energy Electron exPeriment (HEP)” onboard the ERG satellite, American Geophysical Union fall meeting Miyoshi Y, et al (2017) Arase: mission overview and initial results. In: American Geophysical Union fall meeting Nishida A (1994) The geotail mission. Geophys Res Lett 21(25):2871–2873. https://doi.org/10.1029/94GL01223 Ogasawara K, Asamura K, Mukai T, Saito Y (2005) Avalanche photodiode for measurement of low-energy electrons. Nucl Instrum Methods Phys Res Sect A 545(3):744–752. https://doi.org/10.1016/j.nima.2005.02.026 Ogasawara K, Takashima T, Asamura K, Saito Y, Mukai T (2006) The effect of depletion layer thickness in avalanche photodiodes for measurement of low-energy electrons. Nucl Instrum Methods Phys Res Sect A 566(2):575–583. https://doi.org/10.1016/j.nima.2006.08.001 Ogasawara K, Hirahara M, Miyake W, Kasahara S, Takashima T, Asamura K, Saito Y, Mukai T (2008) High-resolution detection of 100 keV electrons using avalanche photodiodes. Nucl Instrum Methods Phys Res Sect A 594(1):50–55. https://doi.org/10.1016/j.nima.2008.05.056 Ogasawara K, Livi SA, Allegrini F, Broiles TW, Dayeh MA, Desai MI, Ebert RW, Llera K, Vines SK, McComas DJ (2016) Next-generation solid-state detectors for charged particle spectroscopy. J Geophys Res Space Phys 121(7):6075–6091. https://doi.org/10.1002/2016JA022559.2016JA022559 Omura Y, Summers D (2006) Dynamics of high-energy electrons interacting with whistler mode chorus emissions in the magnetosphere. J Geophys Res Space Phys 111(A9):A09222. https://doi.org/10.1029/2006JA011600 Omura Y, Katoh Y, Summers D (2008) Theory and simulation of the generation of whistler-mode chorus. J Geophys Res Space Phys 113(A4):A04223. https://doi.org/10.1029/2007JA012622 Seki K, Miyoshi Y, Ebihara Y, Katoh Y, Amano T, Saito S, Shoji M, Nakamizo A, Keika K, Hori T, Nakano S, Kamiya K, Takahashi N, Omura Y, Nose M, Fok M-C, Tanaka T, Ieda A, Yoshikawa A (2018) Theory, modeling and integrated studies in the Arase (ERG) project. Earth Planets Space 70:17. https://doi.org/10.1186/s40623-018-0785-9 Shiokawa K et al (2017) 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. Earth Planets Space 69:160. https://doi.org/10.1186/s40623-017-0745-9 Summers D, Thorne RM, Xiao F (1998) Relativistic theory of wave-particle resonant diffusion with application to electron acceleration in the magnetosphere. J Geophys Res Space Phys 103(A9):20487–20500. https://doi.org/10.1029/98JA01740