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Search: WFRF:(Pollock C. J.)

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  • Torbert, R. B., et al. (author)
  • Electron-scale dynamics of the diffusion region during symmetric magnetic reconnection in space
  • 2018
  • In: Science. - : AMER ASSOC ADVANCEMENT SCIENCE. - 0036-8075 .- 1095-9203. ; 362:6421, s. 1391-1395
  • Journal article (peer-reviewed)abstract
    • Magnetic reconnection is an energy conversion process that occurs in many astrophysical contexts including Earth's magnetosphere, where the process can be investigated in situ by spacecraft. On 11 July 2017, the four Magnetospheric Multiscale spacecraft encountered a reconnection site in Earth's magnetotail, where reconnection involves symmetric inflow conditions. The electron-scale plasma measurements revealed (i) super-Alfvenic electron jets reaching 15,000 kilometers per second; (ii) electron meandering motion and acceleration by the electric field, producing multiple crescent-shaped structures in the velocity distributions; and (iii) the spatial dimensions of the electron diffusion region with an aspect ratio of 0.1 to 0.2, consistent with fast reconnection. The well-structured multiple layers of electron populations indicate that the dominant electron dynamics are mostly laminar, despite the presence of turbulence near the reconnection site.
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  • Burch, J. L., et al. (author)
  • Electron-scale measurements of magnetic reconnection in space
  • 2016
  • In: Science. - : AMER ASSOC ADVANCEMENT SCIENCE. - 0036-8075 .- 1095-9203. ; 352:6290, s. 1189-
  • Research review (peer-reviewed)abstract
    • Magnetic reconnection is a fundamental physical process in plasmas whereby stored magnetic energy is converted into heat and kinetic energy of charged particles. Reconnection occurs in many astrophysical plasma environments and in laboratory plasmas. Using measurements with very high time resolution, NASA's Magnetospheric Multiscale (MMS) mission has found direct evidence for electron demagnetization and acceleration at sites along the sunward boundary of Earth's magnetosphere where the interplanetary magnetic field reconnects with the terrestrial magnetic field. We have (i) observed the conversion of magnetic energy to particle energy; (ii) measured the electric field and current, which together cause the dissipation of magnetic energy; and (iii) identified the electron population that carries the current as a result of demagnetization and acceleration within the reconnection diffusion/dissipation region.
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  • Result 1-10 of 111
Type of publication
journal article (103)
conference paper (5)
research review (3)
Type of content
peer-reviewed (106)
other academic/artistic (5)
Author/Editor
Ergun, R. E. (60)
Russell, C. T. (60)
Torbert, R. B. (58)
Giles, B. L. (54)
Burch, J. L. (52)
Lindqvist, Per-Arne (51)
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Strangeway, R. J. (49)
Pollock, C. J. (48)
Gershman, D. J. (45)
Lavraud, B. (44)
Khotyaintsev, Yuri V ... (42)
Dorelli, J. C. (32)
Saito, Y. (30)
Magnes, W. (30)
Pollock, C. (30)
Paterson, W. R. (28)
Le Contel, O. (27)
Avanov, L. A. (25)
Wilder, F. D. (23)
Moore, T. E. (23)
Nakamura, R. (19)
Graham, Daniel B. (19)
Phan, T. D. (19)
Chen, L. -J (18)
Khotyaintsev, Yuri (17)
Argall, M. R. (17)
Fuselier, S. A. (17)
Khotyaintsev, Yu. V. (16)
Eastwood, J. P. (16)
Wang, S (15)
Plaschke, F. (15)
Goodrich, K. A. (15)
Vaivads, Andris (13)
Marklund, Göran (13)
Burch, J. (13)
Retino, A. (12)
Dorelli, J. (11)
Norgren, Cecilia (10)
Giles, B. (10)
Hesse, M (10)
Cassak, P. A. (10)
Kumar, P. (9)
Liu, SW (9)
Eriksson, S. (9)
Marklund, Göran T. (9)
Baumjohann, W. (9)
Turner, D. L. (9)
Schwartz, S (9)
Drake, J. F. (9)
de Silva, HA (9)
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Uppsala University (76)
Royal Institute of Technology (59)
Karolinska Institutet (24)
Lund University (3)
University of Gothenburg (2)
Stockholm University (2)
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Linköping University (1)
Mid Sweden University (1)
Chalmers University of Technology (1)
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Language
English (111)
Research subject (UKÄ/SCB)
Natural sciences (81)
Medical and Health Sciences (15)

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