Turbulent amplification of magnetic fields in laboratory laser-produced shock waves

J. Meinecke, H.W. Doyle, F. Miniati, A.R. Bell, R. Bingham, R. Crowston, R.P. Drake, M. Fatenejad, M. Koenig, Y. Kuramitsu, C.C. Kuranz, D.Q. Lamb, D. Lee, M.J. MacDonald, C.D. Murphy, H-S. Park, A. Pelka, A. Ravasio, Y. Sakawa, A.A. Schekochihin & 7 others A. Scopatz, P. Tzeferacos, W.C. Wan, N.C. Woolsey, R. Yurchak, B. Reville, G. Gregori

Research output: Contribution to journalArticle

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Abstract

X-ray and radio observations of the supernova remnant Cassiopeia A reveal the presence of magnetic fields about 100 times stronger than those in the surrounding interstellar medium. Field coincident with the outer shock probably arises through a nonlinear feedback process involving cosmic rays. The origin of the large magnetic field in the interior of the remnant is less clear but it is presumably stretched and amplified by turbulent motions. Turbulence may be generated by hydrodynamic instability at the contact discontinuity between the supernova ejecta and the circumstellar gas. However, optical observations of Cassiopeia A indicate that the ejecta are interacting with a highly inhomogeneous, dense circumstellar cloud bank formed before the supernova explosion. Here we investigate the possibility that turbulent amplification is induced when the outer shock overtakes dense clumps in the ambient medium. We report laboratory experiments that indicate the magnetic field is amplified when the shock interacts with a plastic grid. We show that our experimental results can explain the observed synchrotron emission in the interior of the remnant. The experiment also provides a laboratory example of magnetic field amplification by turbulence in plasmas, a physical process thought to occur in many astrophysical phenomena.
LanguageEnglish
Pages520-524
Number of pages5
JournalNature Physics
Volume10
Early online date1 Jun 2014
DOIs
Publication statusPublished - 2014

Fingerprint

shock waves
Cassiopeia A
shock
ejecta
magnetic fields
lasers
supernovae
turbulence
nonlinear feedback
radio observation
clumps
supernova remnants
explosions
cosmic rays
discontinuity
astrophysics
synchrotrons
plastics
hydrodynamics
grids

Keywords

  • X-ray imaging
  • Cassiopeia A
  • magnetic fields

Cite this

Meinecke, J., Doyle, H. W., Miniati, F., Bell, A. R., Bingham, R., Crowston, R., ... Gregori, G. (2014). Turbulent amplification of magnetic fields in laboratory laser-produced shock waves. Nature Physics, 10, 520-524. https://doi.org/10.1038/NPHYS2978
Meinecke, J. ; Doyle, H.W. ; Miniati, F. ; Bell, A.R. ; Bingham, R. ; Crowston, R. ; Drake, R.P. ; Fatenejad, M. ; Koenig, M. ; Kuramitsu, Y. ; Kuranz, C.C. ; Lamb, D.Q. ; Lee, D. ; MacDonald, M.J. ; Murphy, C.D. ; Park, H-S. ; Pelka, A. ; Ravasio, A. ; Sakawa, Y. ; Schekochihin, A.A. ; Scopatz, A. ; Tzeferacos, P. ; Wan, W.C. ; Woolsey, N.C. ; Yurchak, R. ; Reville, B. ; Gregori, G. / Turbulent amplification of magnetic fields in laboratory laser-produced shock waves. In: Nature Physics. 2014 ; Vol. 10. pp. 520-524.
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Meinecke, J, Doyle, HW, Miniati, F, Bell, AR, Bingham, R, Crowston, R, Drake, RP, Fatenejad, M, Koenig, M, Kuramitsu, Y, Kuranz, CC, Lamb, DQ, Lee, D, MacDonald, MJ, Murphy, CD, Park, H-S, Pelka, A, Ravasio, A, Sakawa, Y, Schekochihin, AA, Scopatz, A, Tzeferacos, P, Wan, WC, Woolsey, NC, Yurchak, R, Reville, B & Gregori, G 2014, 'Turbulent amplification of magnetic fields in laboratory laser-produced shock waves' Nature Physics, vol. 10, pp. 520-524. https://doi.org/10.1038/NPHYS2978

Turbulent amplification of magnetic fields in laboratory laser-produced shock waves. / Meinecke, J.; Doyle, H.W.; Miniati, F.; Bell, A.R.; Bingham, R.; Crowston, R.; Drake, R.P.; Fatenejad, M.; Koenig, M.; Kuramitsu, Y.; Kuranz, C.C.; Lamb, D.Q.; Lee, D.; MacDonald, M.J.; Murphy, C.D.; Park, H-S.; Pelka, A.; Ravasio, A.; Sakawa, Y.; Schekochihin, A.A.; Scopatz, A.; Tzeferacos, P.; Wan, W.C.; Woolsey, N.C.; Yurchak, R.; Reville, B.; Gregori, G.

In: Nature Physics, Vol. 10, 2014, p. 520-524.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Turbulent amplification of magnetic fields in laboratory laser-produced shock waves

AU - Meinecke, J.

AU - Doyle, H.W.

AU - Miniati, F.

AU - Bell, A.R.

AU - Bingham, R.

AU - Crowston, R.

AU - Drake, R.P.

AU - Fatenejad, M.

AU - Koenig, M.

AU - Kuramitsu, Y.

AU - Kuranz, C.C.

AU - Lamb, D.Q.

AU - Lee, D.

AU - MacDonald, M.J.

AU - Murphy, C.D.

AU - Park, H-S.

AU - Pelka, A.

AU - Ravasio, A.

AU - Sakawa, Y.

AU - Schekochihin, A.A.

AU - Scopatz, A.

AU - Tzeferacos, P.

AU - Wan, W.C.

AU - Woolsey, N.C.

AU - Yurchak, R.

AU - Reville, B.

AU - Gregori, G.

PY - 2014

Y1 - 2014

N2 - X-ray and radio observations of the supernova remnant Cassiopeia A reveal the presence of magnetic fields about 100 times stronger than those in the surrounding interstellar medium. Field coincident with the outer shock probably arises through a nonlinear feedback process involving cosmic rays. The origin of the large magnetic field in the interior of the remnant is less clear but it is presumably stretched and amplified by turbulent motions. Turbulence may be generated by hydrodynamic instability at the contact discontinuity between the supernova ejecta and the circumstellar gas. However, optical observations of Cassiopeia A indicate that the ejecta are interacting with a highly inhomogeneous, dense circumstellar cloud bank formed before the supernova explosion. Here we investigate the possibility that turbulent amplification is induced when the outer shock overtakes dense clumps in the ambient medium. We report laboratory experiments that indicate the magnetic field is amplified when the shock interacts with a plastic grid. We show that our experimental results can explain the observed synchrotron emission in the interior of the remnant. The experiment also provides a laboratory example of magnetic field amplification by turbulence in plasmas, a physical process thought to occur in many astrophysical phenomena.

AB - X-ray and radio observations of the supernova remnant Cassiopeia A reveal the presence of magnetic fields about 100 times stronger than those in the surrounding interstellar medium. Field coincident with the outer shock probably arises through a nonlinear feedback process involving cosmic rays. The origin of the large magnetic field in the interior of the remnant is less clear but it is presumably stretched and amplified by turbulent motions. Turbulence may be generated by hydrodynamic instability at the contact discontinuity between the supernova ejecta and the circumstellar gas. However, optical observations of Cassiopeia A indicate that the ejecta are interacting with a highly inhomogeneous, dense circumstellar cloud bank formed before the supernova explosion. Here we investigate the possibility that turbulent amplification is induced when the outer shock overtakes dense clumps in the ambient medium. We report laboratory experiments that indicate the magnetic field is amplified when the shock interacts with a plastic grid. We show that our experimental results can explain the observed synchrotron emission in the interior of the remnant. The experiment also provides a laboratory example of magnetic field amplification by turbulence in plasmas, a physical process thought to occur in many astrophysical phenomena.

KW - X-ray imaging

KW - Cassiopeia A

KW - magnetic fields

U2 - 10.1038/NPHYS2978

DO - 10.1038/NPHYS2978

M3 - Article

VL - 10

SP - 520

EP - 524

JO - Nature Physics

T2 - Nature Physics

JF - Nature Physics

SN - 1745-2473

ER -