Coherent structures, intermittent turbulence, and dissipation in high-temperature plasmas
被引:288
作者:
Karimabadi, H.
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机构:
Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USAUniv Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA
Karimabadi, H.
[1
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Roytershteyn, V.
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机构:
Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USAUniv Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA
Roytershteyn, V.
[1
]
Wan, M.
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h-index: 0
机构:
Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USAUniv Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA
Wan, M.
[2
]
Matthaeus, W. H.
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h-index: 0
机构:
Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USAUniv Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA
Matthaeus, W. H.
[2
]
Daughton, W.
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h-index: 0
机构:
Los Alamos Natl Lab, Los Alamos, NM 87545 USAUniv Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA
Daughton, W.
[3
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Wu, P.
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h-index: 0
机构:
Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USAUniv Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA
Wu, P.
[2
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Shay, M.
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h-index: 0
机构:
Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USAUniv Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA
Shay, M.
[2
]
Loring, B.
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h-index: 0
机构:
Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USAUniv Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA
Loring, B.
[4
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Borovsky, J.
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h-index: 0
机构:
Space Sci Inst, Boulder, CO 80301 USAUniv Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA
Borovsky, J.
[5
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Leonardis, E.
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机构:
Univ Warwick, Ctr Fus Space & Astrophys, Coventry CV4 7AL, W Midlands, EnglandUniv Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA
Leonardis, E.
[6
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Chapman, S. C.
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Univ Warwick, Ctr Fus Space & Astrophys, Coventry CV4 7AL, W Midlands, England
Univ Tromso, Dept Math & Stat, Tomso, NorwayUniv Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA
Chapman, S. C.
[6
,7
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Nakamura, T. K. M.
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h-index: 0
机构:
Los Alamos Natl Lab, Los Alamos, NM 87545 USAUniv Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA
Nakamura, T. K. M.
[3
]
机构:
[1] Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA
[2] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA
[3] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
[4] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA
[5] Space Sci Inst, Boulder, CO 80301 USA
[6] Univ Warwick, Ctr Fus Space & Astrophys, Coventry CV4 7AL, W Midlands, England
An unsolved problem in plasma turbulence is how energy is dissipated at small scales. Particle collisions are too infrequent in hot plasmas to provide the necessary dissipation. Simulations either treat the fluid scales and impose an ad hoc form of dissipation (e. g., resistivity) or consider dissipation arising from resonant damping of small amplitude disturbances where damping rates are found to be comparable to that predicted from linear theory. Here, we report kinetic simulations that span the macroscopic fluid scales down to the motion of electrons. We find that turbulent cascade leads to generation of coherent structures in the form of current sheets that steepen to electron scales, triggering strong localized heating of the plasma. The dominant heating mechanism is due to parallel electric fields associated with the current sheets, leading to anisotropic electron and ion distributions which can be measured with NASA's upcoming Magnetospheric Multiscale mission. The motion of coherent structures also generates waves that are emitted into the ambient plasma in form of highly oblique compressional and shear Alfven modes. In 3D, modes propagating at other angles can also be generated. This indicates that intermittent plasma turbulence will in general consist of both coherent structures and waves. However, the current sheet heating is found to be locally several orders of magnitude more efficient than wave damping and is sufficient to explain the observed heating rates in the solar wind. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4773205]
机构:
Univ Wisconsin, Dept Phys, Madison, WI 53706 USAUniv Wisconsin, Dept Phys, Madison, WI 53706 USA
Boldyrev, Stanislav
Perez, Jean Carlos
论文数: 0引用数: 0
h-index: 0
机构:
Univ Wisconsin, Dept Phys, Madison, WI 53706 USA
Univ New Hampshire, Ctr Space Sci, Durham, NH 03824 USA
Univ New Hampshire, Dept Phys, Durham, NH 03824 USAUniv Wisconsin, Dept Phys, Madison, WI 53706 USA
机构:
Space Sci Inst, Boulder, CO 80301 USA
Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USASpace Sci Inst, Boulder, CO 80301 USA
机构:
Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA
Univ Delaware, Bartol Res Inst, Newark, DE 19716 USAUniv Delaware, Dept Phys & Astron, Newark, DE 19716 USA
Breech, B.
Matthaeus, W. H.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA
Univ Delaware, Bartol Res Inst, Newark, DE 19716 USAUniv Delaware, Dept Phys & Astron, Newark, DE 19716 USA
Matthaeus, W. H.
Minnie, J.
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h-index: 0
机构:
Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA
Univ Delaware, Bartol Res Inst, Newark, DE 19716 USAUniv Delaware, Dept Phys & Astron, Newark, DE 19716 USA
Minnie, J.
Bieber, J. W.
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机构:
Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA
Univ Delaware, Bartol Res Inst, Newark, DE 19716 USAUniv Delaware, Dept Phys & Astron, Newark, DE 19716 USA
Bieber, J. W.
Oughton, S.
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h-index: 0
机构:
Univ Waikato, Dept Math, Hamilton 3240, New ZealandUniv Delaware, Dept Phys & Astron, Newark, DE 19716 USA
Oughton, S.
Smith, C. W.
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h-index: 0
机构:
Univ New Hampshire, Dept Phys, Durham, NH 03284 USA
Univ New Hampshire, Inst Study Earth Oceans & Space, Durham, NH 03284 USAUniv Delaware, Dept Phys & Astron, Newark, DE 19716 USA
Smith, C. W.
Isenberg, P. A.
论文数: 0引用数: 0
h-index: 0
机构:
Univ New Hampshire, Dept Phys, Durham, NH 03284 USA
Univ New Hampshire, Inst Study Earth Oceans & Space, Durham, NH 03284 USAUniv Delaware, Dept Phys & Astron, Newark, DE 19716 USA
机构:
Univ Wisconsin, Dept Phys, Madison, WI 53706 USAUniv Wisconsin, Dept Phys, Madison, WI 53706 USA
Boldyrev, Stanislav
Perez, Jean Carlos
论文数: 0引用数: 0
h-index: 0
机构:
Univ Wisconsin, Dept Phys, Madison, WI 53706 USA
Univ New Hampshire, Ctr Space Sci, Durham, NH 03824 USA
Univ New Hampshire, Dept Phys, Durham, NH 03824 USAUniv Wisconsin, Dept Phys, Madison, WI 53706 USA
机构:
Space Sci Inst, Boulder, CO 80301 USA
Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USASpace Sci Inst, Boulder, CO 80301 USA
机构:
Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA
Univ Delaware, Bartol Res Inst, Newark, DE 19716 USAUniv Delaware, Dept Phys & Astron, Newark, DE 19716 USA
Breech, B.
Matthaeus, W. H.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA
Univ Delaware, Bartol Res Inst, Newark, DE 19716 USAUniv Delaware, Dept Phys & Astron, Newark, DE 19716 USA
Matthaeus, W. H.
Minnie, J.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA
Univ Delaware, Bartol Res Inst, Newark, DE 19716 USAUniv Delaware, Dept Phys & Astron, Newark, DE 19716 USA
Minnie, J.
Bieber, J. W.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA
Univ Delaware, Bartol Res Inst, Newark, DE 19716 USAUniv Delaware, Dept Phys & Astron, Newark, DE 19716 USA
Bieber, J. W.
Oughton, S.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Waikato, Dept Math, Hamilton 3240, New ZealandUniv Delaware, Dept Phys & Astron, Newark, DE 19716 USA
Oughton, S.
Smith, C. W.
论文数: 0引用数: 0
h-index: 0
机构:
Univ New Hampshire, Dept Phys, Durham, NH 03284 USA
Univ New Hampshire, Inst Study Earth Oceans & Space, Durham, NH 03284 USAUniv Delaware, Dept Phys & Astron, Newark, DE 19716 USA
Smith, C. W.
Isenberg, P. A.
论文数: 0引用数: 0
h-index: 0
机构:
Univ New Hampshire, Dept Phys, Durham, NH 03284 USA
Univ New Hampshire, Inst Study Earth Oceans & Space, Durham, NH 03284 USAUniv Delaware, Dept Phys & Astron, Newark, DE 19716 USA