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Simulations of Dynamo and Magnetorotational Instability in Madison Plasma Experiments and Astrophysical Disks

Technical Report ·
DOI:https://doi.org/10.2172/1422354· OSTI ID:1422354
 [1]
  1. Princeton Univ., NJ (United States). Dept. of Astrophysical Sciences; Office of Acquisition and Assistance Office of Science – Integrated Support Center
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Magnetic fields are observed to exist on all scales in many astrophysical sources such as stars, galaxies, and accretion discs. Understanding the origin of large scale magnetic fields, whereby the field emerges on spatial scales large compared to the fluctuations, has been a particularly long standing challenge. Our physics objective are: 1) what are the minimum ingredients for large-scale dynamo growth? 2) could a large-scale magnetic field grow out of turbulence and sustained despite the presence of dissipation? These questions are fundamental for understanding the large-scale dynamo in both laboratory and astrophysical plasmas. Here, we report major new findings in the area of Large-Scale Dynamo (magnetic field generation).
Research Organization:
Princeton Univ., NJ (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
DOE Contract Number:
SC0012467
OSTI ID:
1422354
Report Number(s):
DOE-PU--12467
Country of Publication:
United States
Language:
English

References (3)

Large-scale dynamo action precedes turbulence in shearing box simulations of the magnetorotational instability journal July 2016
Radially dependent large-scale dynamos in global cylindrical shear flows and the local cartesian limit journal March 2016
Evolution of the magnetorotational instability on initially tangled magnetic fields journal August 2017

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Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
79 ASTRONOMY AND ASTROPHYSICS