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Schoeffler, K. M., Loureiro, N. F., Fonseca, R. A. & Silva, L. O. (2014). Magnetic-field generation and amplification in an expanding plasma. Physical Review Letters. 112 (17)
K. M. Schoeffler et al., "Magnetic-field generation and amplification in an expanding plasma", in Physical Review Letters, vol. 112, no. 17, 2014
@article{schoeffler2014_1731755828515, author = "Schoeffler, K. M. and Loureiro, N. F. and Fonseca, R. A. and Silva, L. O.", title = "Magnetic-field generation and amplification in an expanding plasma", journal = "Physical Review Letters", year = "2014", volume = "112", number = "17", doi = "10.1103/PhysRevLett.112.175001", url = "http://link.aps.org/doi/10.1103/PhysRevLett.112.175001" }
TY - JOUR TI - Magnetic-field generation and amplification in an expanding plasma T2 - Physical Review Letters VL - 112 IS - 17 AU - Schoeffler, K. M. AU - Loureiro, N. F. AU - Fonseca, R. A. AU - Silva, L. O. PY - 2014 SN - 0031-9007 DO - 10.1103/PhysRevLett.112.175001 UR - http://link.aps.org/doi/10.1103/PhysRevLett.112.175001 AB - Particle-cell simulations are used to investigate the formation of magnetic fields B in plasmas with perpendicular electron density and temperature gradients. For system sizes L comparable to the ion skin depth d(i), it is shown that B similar to i/L, consistent with the Biermann battery effect. However, for large L/d(i), it is found that the Weibel instability (due to electron temperature anisotropy) supersedes the Biermann battery as the main producer of B. The Weibel-produced fields saturate at a finite amplitude (plasma beta approximate to 100), independent of L. The magnetic energy spectra below the electron Larmor radius scale are well fitted by the power law with slope -16/3, as predicted by Schekochihin et al. ER -