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Title: Formation of collisionless shocks in magnetized plasma interaction with kinetic-scale obstacles

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/1.4975310· OSTI ID:1353106
ORCiD logo [1];  [2];  [3];  [4]; ORCiD logo [5]; ORCiD logo [1]
  1. Univ. of Lisbon (Portugal). Inst. Superior Tecnico, Inst. of Plasmas and Nuclear Fusion, Group for Lasers and Plasmas (GoLP)
  2. Univ. of Lisbon (Portugal). Inst. Superior Tecnico, Inst. of Plasmas and Nuclear Fusion, Group for Lasers and Plasmas (GoLP); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. Science and Technology Facilities Council (STFC), Oxford (United Kingdom). Rutherford Appleton Lab. (RAL)
  4. Science and Technology Facilities Council (STFC), Oxford (United Kingdom). Rutherford Appleton Lab. (RAL); Univ. of Strathclyde, Glasgow, Scotland (United Kingdom)
  5. Univ. of Lisbon (Portugal). Inst. Superior Tecnico, Inst. of Plasmas and Nuclear Fusion, Group for Lasers and Plasmas (GoLP); Univ. of Lisbon (Portugal). Inst. Univ. de Lisboa (ISCTE-IUL), Dept. of Information Science and Technology (DCTI)

We investigate the formation of collisionless magnetized shocks triggered by the interaction between magnetized plasma flows and miniature-sized (order of plasma kinetic-scales) magnetic obstacles resorting to massively parallel, full particle-in-cell simulations, including the electron kinetics. The critical obstacle size to generate a compressed plasma region ahead of these objects is determined by independently varying the magnitude of the dipolar magnetic moment and the plasma magnetization. Here we find that the effective size of the obstacle depends on the relative orientation between the dipolar and plasma internal magnetic fields, and we show that this may be critical to form a shock in small-scale structures. We also study the microphysics of the magnetopause in different magnetic field configurations in 2D and compare the results with full 3D simulations. Finally, we evaluate the parameter range where such miniature magnetized shocks can be explored in laboratory experiments.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
ERC-2015-AdG 695088; AC02-76SF00515
OSTI ID:
1353106
Journal Information:
Physics of Plasmas, Vol. 24, Issue 2; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 11 works
Citation information provided by
Web of Science

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Cited By (2)

A platform for high-repetition-rate laser experiments on the Large Plasma Device journal January 2018
Electron acceleration by wave turbulence in a magnetized plasma journal March 2018