Magnetosphere Theory

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INTRODUCTION The Earth's magnetosphere is the cavity region where geomagnetic fields dominate.The shape of the magnetosphere is greatly modified by the solar wind ,a continuous plasma flow emitted radially outward from the distant Sun, which compresses geomagnetic field lines on the dayside thereby creating a Bow Shock and stretches the nightside field lines hence shaping up the Plasmatail .Various particles exists in the magnetosphere viz. Plasmasphere particles, Ring current and Radiation belts .These ionized particle populations called plasma tend to be organized by their energy and locations .These ionized particles contribute to generate four major types of current systems in the magnetosphere ; Magnetopause current, Tail current,…show more content…
The most important element in the open magnetosphere model is the magnetic field reconnection process, which occurs at the magnetopause. The evidence of the magnetic field reconnection has been demonstrated by observations carried out with the aid of ISEE spacecraft. Theory description of physical phenomena occurring during magnetic field reconnection is often based on the Parker-Sweet diffusion model where the transient layer is determined by the effective frequency characterizing the electron momentum loss. In dusty plasmas, strong anomalous dissipation appears which is due to the effect of absorption of plasma particles on dust grains. Thus the effective frequency characterizing the electron momentum loss is modified in the dusty plasmas and the effects of electron-dust particle interaction can determine the width of the transient layer of the…show more content…
It is through electromagnetic radiation,originating from these plasmas and reaching us here on earth .Thus plasmas are not exotic but are most obvious phenomena occuring in universe . Plasmas can not only be used to grow particles as per our need but can also be used to modify the properties of existing materials that are introduced into the processing plasmas. One of the main advantages of the use of low pressure plasmas is that size of grown particles can be controlled and the very nature of the processes leads to the formation of relatively mono disperse (very narrow size distribution) particles. The nanoparticles grown in plasma discharges are seen as the building blocks of nanotechnology. A few examples of the applications of dusty plasmas which have already been realized : 1. Nanocrystalline silicon particles grown in silane plasmas, embedded into the intrinsic layer of amorphous hydrogenated silicon particles (a-Si:H), have shown to increase both the lifetime and efficiency of silicon solar
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