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:
-
- Imperial College, London (United Kingdom)
- Imperial College, London (United Kingdom); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sorbonne Univ., Paris (France); PSL Research Univ., Paris (France)
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Xi'an Jiaotong Univ., Xi'an (China)
- China Academy of Engineering Physics, Mianyang (China)
- 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.
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
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.
@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}
}
Web of Science
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