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Title: Structure of a magnetic flux annihilation layer formed by the collision of supersonic, magnetized plasma flows

Abstract

We present experiments characterizing the detailed structure of a current layer, generated by the collision of two counter-streaming, supersonic and magnetized aluminum plasma flows. The anti parallel magnetic fields advected by the flows are found to be mutually annihilated inside the layer, giving rise to a bifurcated current structure—two narrow current sheets running along the outside surfaces of the layer. Measurements with Thomson scattering show a fast outflow of plasma along the layer and a high ion temperature (Ti~¯ZTe, with average ionization ¯Z=7). Lastly, analysis of the spatially resolved plasma parameters indicates that the advection and subsequent annihilation of the in-flowing magnetic flux determines the structure of the layer, while the ion heating could be due to the development of kinetic, current-driven instabilities.

Authors:
 [1];  [1];  [1];  [2];  [1];  [3];  [1];  [4];  [1];  [1];  [5];  [6];  [1];  [7];  [1];  [1];  [1]
+ Show Author Affiliations
  1. Imperial College, London (United Kingdom)
  2. Imperial College, London (United Kingdom); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Sorbonne Univ., Paris (France); PSL Research Univ., Paris (France)
  4. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  5. Xi'an Jiaotong Univ., Xi'an (China)
  6. China Academy of Engineering Physics, Mianyang (China)
  7. Univ. of Rochester, Rochester, NY (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1346128
Alternate Identifier(s):
OSTI ID: 1254891
Report Number(s):
LLNL-JRNL-697686
Journal ID: ISSN 0031-9007; PRLTAO
Grant/Contract Number:  
AC52-07NA27344; F03-02NA00057; SC-0001063
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 116; Journal Issue: 22; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION; 42 ENGINEERING

Citation Formats

Suttle, L. G., Hare, J. D., Lebedev, S. V., Swadling, G. F., Burdiak, G. C., Ciardi, A., Chittenden, J. P., Loureiro, N. F., Niasse, N., Suzuki-Vidal, F., Wu, J., Yang, Q., Clayson, T., Frank, A., Robinson, T. S., Smith, R. A., and Stuart, N. Structure of a magnetic flux annihilation layer formed by the collision of supersonic, magnetized plasma flows. United States: N. p., 2016. Web. doi:10.1103/PhysRevLett.116.225001.
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Suttle, L. G., Hare, J. D., Lebedev, S. V., Swadling, G. F., Burdiak, G. C., Ciardi, A., Chittenden, J. P., Loureiro, N. F., Niasse, N., Suzuki-Vidal, F., Wu, J., Yang, Q., Clayson, T., Frank, A., Robinson, T. S., Smith, R. A., & Stuart, N. Structure of a magnetic flux annihilation layer formed by the collision of supersonic, magnetized plasma flows. United States. https://doi.org/10.1103/PhysRevLett.116.225001
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Suttle, L. G., Hare, J. D., Lebedev, S. V., Swadling, G. F., Burdiak, G. C., Ciardi, A., Chittenden, J. P., Loureiro, N. F., Niasse, N., Suzuki-Vidal, F., Wu, J., Yang, Q., Clayson, T., Frank, A., Robinson, T. S., Smith, R. A., and Stuart, N. Tue . "Structure of a magnetic flux annihilation layer formed by the collision of supersonic, magnetized plasma flows". United States. https://doi.org/10.1103/PhysRevLett.116.225001. https://www.osti.gov/servlets/purl/1346128.
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@article{osti_1346128,
title = {Structure of a magnetic flux annihilation layer formed by the collision of supersonic, magnetized plasma flows},
author = {Suttle, L. G. and Hare, J. D. and Lebedev, S. V. and Swadling, G. F. and Burdiak, G. C. and Ciardi, A. and Chittenden, J. P. and Loureiro, N. F. and Niasse, N. and Suzuki-Vidal, F. and Wu, J. and Yang, Q. and Clayson, T. and Frank, A. and Robinson, T. S. and Smith, R. A. and Stuart, N.},
abstractNote = {We present experiments characterizing the detailed structure of a current layer, generated by the collision of two counter-streaming, supersonic and magnetized aluminum plasma flows. The anti parallel magnetic fields advected by the flows are found to be mutually annihilated inside the layer, giving rise to a bifurcated current structure—two narrow current sheets running along the outside surfaces of the layer. Measurements with Thomson scattering show a fast outflow of plasma along the layer and a high ion temperature (Ti~¯ZTe, with average ionization ¯Z=7). Lastly, analysis of the spatially resolved plasma parameters indicates that the advection and subsequent annihilation of the in-flowing magnetic flux determines the structure of the layer, while the ion heating could be due to the development of kinetic, current-driven instabilities.},
doi = {10.1103/PhysRevLett.116.225001},
journal = {Physical Review Letters},
number = 22,
volume = 116,
place = {United States},
year = {Tue May 31 00:00:00 EDT 2016},
month = {Tue May 31 00:00:00 EDT 2016}
}
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https://doi.org/10.1103/PhysRevLett.116.225001
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    Works referencing / citing this record:

    An experimental platform for pulsed-power driven magnetic reconnection
    journal, May 2018

    • Hare, J. D.; Suttle, L. G.; Lebedev, S. V.
    • Physics of Plasmas, Vol. 25, Issue 5
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    Ion heating and magnetic flux pile-up in a magnetic reconnection experiment with super-Alfvénic plasma inflows
    journal, April 2018

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    • DOI: 10.1063/1.5023664

    Interactions of magnetized plasma flows in pulsed-power driven experiments
    journal, December 2019

    • Suttle, L. G.; Burdiak, G. C.; Cheung, C. L.
    • Plasma Physics and Controlled Fusion, Vol. 62, Issue 1
    • DOI: 10.1088/1361-6587/ab5296

    Interactions of magnetized plasma flows in pulsed-power driven experiments
    text, January 2019

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