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|a (TOE)ost6984293
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|a (TOE)6984293
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|a E 1.99:la-10819-t
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|a E 1.99:la-10819-t
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|a Field reversing magnetotail current sheets
|h [electronic resource] :
|b earth, Venus, and Comet Giacobini-Zinner.
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| 260 |
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|a Los Alamos, N.M. :
|b Los Alamos National Laboratory ;
|a Oak Ridge, Tenn. :
|b distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
|c 1986.
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| 300 |
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|a Pages: 204 :
|b digital, PDF file.
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| 336 |
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|a text
|b txt
|2 rdacontent.
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| 337 |
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|a computer
|b c
|2 rdamedia.
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| 338 |
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|a online resource
|b cr
|2 rdacarrier.
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|a Published through the Information Bridge: DOE Scientific and Technical Information.
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|a 09/01/1986.
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|a "la-10819-t"
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|a "DE87002229"
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|a McComas, D.J.
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3 |
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|a This dissertation examines the field reversing magnetotail current sheets at the earth, Venus, and Comet Giacobini-Zinner. In the near earth study a new analysis technique is developed to calculate the detailed current density distributions within the cross tail current sheet for the first time. This technique removes the effects of a variable sheet velocity by inverting intersatellite timings between the co-orbiting satellites ISEE-1 and -2. Case studies of three relatively geomagnetically quiet crossings are made; sheet thicknesses and peak current densities are approx.1-5 x 10⁴ km and approx.5-50 nA/m². Current density distributions reveal a high density central region, lower density shoulders, and considerable fine structure throughout. In the Venus study another new analysis technique is developed to reconstruct the average tail configuration from a correlation between field magnitude and draping angle in a large statistical data set. In the comet study, high resolution magnetic field and plasma electron data from the ICE traversal of Giacobini-Zinner are combined for the first time to determine the tail/current sheet geometry and calculate certain important but unmeasured local ion and upstream properties. Pressure balance across the tail gives ion temperatures and betas of approx.1.2 x 10⁵ K and approx.40 in the center of the current sheet to approx.1 x 10⁶ K and approx.3 in the outer lobes. Axial stress balance shows that the velocity shear upstream near the nucleus is >6 (approx.1 at ICE), and that a region of strongly enhanced mass loading (ion source rate approx.24 times that upstream from lobes) exists upstream from the current sheet. The integrated downtail mass flux is approx.2.6 x 10²⁶ H₂O+/sec, which is only approx.1% of the independently determined total cometary efflux. 79 refs., 37 figs.
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|b W-7405-ENG-36.
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| 650 |
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|a Earth Planet.
|2 local.
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|a Magnetic Fields.
|2 local.
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| 650 |
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|a Magnetotail.
|2 local.
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|a Planets.
|2 local.
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|a Earth Magnetosphere.
|2 local.
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|a Earth Atmosphere.
|2 local.
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| 650 |
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|a Comets.
|2 local.
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| 650 |
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|a Plasma.
|2 local.
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| 650 |
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|a Current Density.
|2 local.
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| 650 |
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|a Venus Planet.
|2 local.
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| 650 |
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|a Classical And Quantum Mechanics, General Physics.
|2 edbsc.
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| 710 |
2 |
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|a Los Alamos National Laboratory.
|4 res.
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| 710 |
1 |
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|a United States.
|b Department of Energy.
|b Office of Scientific and Technical Information.
|4 dst.
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| 856 |
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|u http://www.osti.gov/servlets/purl/6984293-EUuaml/
|z Online Access
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| 907 |
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|a .b60107236
|b 03-06-23
|c 05-30-10
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| 998 |
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|a web
|b 05-30-10
|c f
|d m
|e p
|f eng
|g nmu
|h 0
|i 1
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|s 33eab0ca-21b1-59f7-bc64-0475f5dfbdc5
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| 952 |
f |
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|p Can circulate
|a University of Colorado Boulder
|b Online
|c Online
|d Online
|e E 1.99:la-10819-t
|h Superintendent of Documents classification
|i web
|n 1
|
