Download Physics of the Magnetosphere: Based upon the Proceedings of by E. N. Parker (auth.), Robert L. Carovillano, John F. McClay, PDF

By E. N. Parker (auth.), Robert L. Carovillano, John F. McClay, Henry R. Radoski (eds.)

This monograph is predicated upon the lawsuits of the summer time Institute, Physics of the Magnetosphere, hung on the Boston university campus, lune 19-28, 1967. the professional gram consisted of invited audio system chosen via the Editors. An try out used to be made to supply finished remedy of all themes of basic relevance to magneto­ spheric physics, yet, after all, a few components obtained larger insurance than others. the 1st part of the convention consisted of tutoriallectures, 4 each one, by way of 5 special scientists, and those are awarded partially I of the monograph. The artides showing partly I have been ready by way of the Editors from tapes of the particular lectures. initial manuscripts have been ready and every tutoriallecturer was once given the chance to make adjustments or advancements that have been included into the ultimate manuscript. H. R. Radoski ready the lectures of Professor Helliwell; 1. F. McClay ready the lectures of Professor Dessler and the 1st of Professor Dungey; and the rest lectures of Professors Dungey, Parker, and Van Allen have been ready by means of me. An attempt was once made for the main half to write down every one manuscript within the kind of the lectures, however the incongruities of spoken English and the variety of scribes within the kitchen surely restricted our good fortune. we all know that English is written much better than it really is spoken, even though for a few cause the spoken be aware is extra dear.

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Extra resources for Physics of the Magnetosphere: Based upon the Proceedings of the Conference Held at Boston College June 19–28, 1967

Example text

In that sense. If even a very small amount of conductivity should be introduced into the atmosphere, the convection would simply stop because the lines offorce would suddenly be nailed into the fluid. So it is not an electric field to which one can appeal for the production of the aurora. It exists only in the nonconducting part of the atmosphere, weIl below where much of the auroral activity is observed. Having steered around that bit of temptation, we should go on now to briefly treat the time-dependent problem.

In the fluid approximation, there is no real interface, and the situation is quite simple. With no partic1es to worry about, if you start out with a perfect1y sharp boundary between field and gas - taken to be an infinite1y conducting fluid - then the boundary would remain perfect1y sharp for all subsequent times. If the fluid possesses some resistivity or diffusivity then the gas will slowly penetrate into the field. s. units the diffusion coefficient 1] is related to the conductivity (J by and the rate at which the gas diffuses into the field may easily be expressed with the error function: 43 DYNAMICAL PROPERTIES OF THE MAGNETOSPHERE Here z is the vertical co ordinate across the boundary as shown in Figure 13, and t denotes the time that the fluid sliding along the boundary has been in contact with the field: t= f~.

10. Schematic current distribution for a plasma bl ob in the equatorial plane of a dipole field. The plasma blob carries a current 1 at a distance R in the equatorial plane. This current splits symmetrically at the ends of the blob and flows along the dipole field lines into the origin. With this asymmetric current distribution flowing into the origin, the inflation of the field is again given by Equation (63). The resultant field is asymmetric about the origin, but the energy ofthe blob is related to the change AB at the origin by the same relation (63).

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