𝔖 Bobbio Scriptorium
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Hydromagnetic turbulence in cometary plasmas

✍ Scribed by N. N. Rao; U. N. Rao; A. C. Das

Publisher
Springer Netherlands
Year
1988
Tongue
English
Weight
453 KB
Volume
43
Category
Article
ISSN
1573-0794

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✦ Synopsis

An instability associated with the magnetosonic wave driven unstable due to coupling with electron and ion drift modes has been considered as a potential source for driving the hydromagnetic turbulence observed in Giacobini-Zinner (G-Z) Cometary plasma. The instability has good growth rate for propagation perpendicular to plasma inhomogeneities and exists for all wave numbers. The wave period for waves propagating perpendicular to the gradients is about a few times ion-gyroperiod and higher values of plasma beta (B,) lead to stronger instability.

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Scaling laws in decaying helical hydroma
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✍ M. Christensson; M. Hindmarsh; A. Brandenburg 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 165 KB

## Abstract We study the evolution of growth and decay laws for the magnetic field coherence length __ξ__, energy __E__~M~ and magnetic helicity __H__ in freely decaying 3D MHD turbulence. We show that with certain assumptions, self‐similarity of the magnetic power spectrum alone implies that __ξ__