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Alpha effect in partially ionized plasmas

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dc.contributor.author Krishan, V
dc.contributor.author Gangadhara, R. T
dc.date.accessioned 2009-07-02T12:48:03Z
dc.date.available 2009-07-02T12:48:03Z
dc.date.issued 2008
dc.identifier.citation Hasan, S. S., Gangadhara, R. T. and Krishan, V. eds., Turbulence, dynamos, accretion disks, pulsars and collective plasma processes, First Kodai-Trieste workshop on plasma astrophysics held at the Kodaikanal Observatory., Astrophysics and space science proceedings., Kodaikanal., India, 2007., pp. 55 - 68 en
dc.identifier.isbn 978-1-4020-8867-4
dc.identifier.uri http://hdl.handle.net/2248/4610
dc.description Restricted Access
dc.description The original publication is available at springerlink.com
dc.description.abstract There are several astrophysical situations where one needs to study the dynamics of magnetic flux in partially ionized turbulent plasmas. In a partially ionized plasma the magnetic induction is subjected to the ambipolar diffusion and the Hall effect in addition to the usual resistive dissipation. In this paper we initiate the study of the kinematic dynamo in a partially ionized turbulent plasma. The Hall effect arises from the treatment of the electrons and the ions as two separate fluids and the ambipolar diffusion due to the inclusion of neutrals as the third fluid. It is shown that these nonideal effects modify the so called α effect and the turbulent diffusion coefficient β in a rather substantial way. The Hall effect may enhance or quench the dynamo action altogether. The ambipolar diffusion brings in an α which depends on the mean magnetic field. The new correlations embodying the coupling of the charged fluids and the neutral fluid appear in a decisive manner. The turbulence is necessarily magnetohydrodynamic with new spatial and time scales. The nature of the new correlations is demonstrated by taking the Alfvénic turbulence as an example. en
dc.language.iso en en
dc.publisher Springer Netherlands en
dc.relation.uri http://dx.doi.org/10.1007/978-1-4020-8868-1_4 en
dc.relation.uri http://adsabs.harvard.edu/abs/2008tdad.conf...55K en
dc.rights © Springer en
dc.subject Astrophysical Turbulence en
dc.subject Pulsars en
dc.subject Dynamos en
dc.subject Solar and Space Plasmas en
dc.subject Ionized Plasmas en
dc.subject Partially Ionized Plasmas en
dc.subject Alpha Effect en
dc.title Alpha effect in partially ionized plasmas en
dc.type Article en

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