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photoionization http://hdl.handle.net/2142/25605 en 1978 Donald Edward Munninghoff ion temperatures electron temperatures topside ionosphere incoherent-scatter data Bowhill, S.A. Munninghoff, Donald Edward 2011-06-30T17:10:18Z 2011-06-30T17:10:18Z 10000-01-01 1978 Experimental and theoretical ion and electron temperatures in the topside ionosphere are investigated. Experimental results come from an analysis of incoherent-scatter data taken at Arecibo, Puerto Rico. Consideration of the energy balance equations gives the theoretical ion and electron temperatures. Two ions, 0+ and H+, are assumed to be the only ions present in the topside ionosphere. Experimental evidence shows that a third ion, He+ is + + relatively unimportant compared to 0 and H. Photoionization of neutral particles, charge transfer, and diffusion of these charged particles are the important physical processes which are used to calculate their number + + + density profiles. o and H number densities are shown to affect the 0 , H+, and electron temperatures. Analysis of theoretical autocorrelation functions of the incoherent-scatter power spectra shows that number densities and temperatures of 0+ , + II , and electrons can be deduced from experimental autocorrelation functions. Experimental temperature results indicate that the maximum difference between ++ Hand 0 temperatures occurs at 550 km. This agrees with temperatures calculated from the energy balance equations. The experimental and theoretical .t and 0+ temperatures agree fairly closely from 200 to 1200 km while the electron temperatures agree from 400 to 1200 km. Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-30T17:10:18Z No. of bitstreams: 1 1978_munninghoff.pdf: 9237084 bytes, checksum: 315060c119e5294201f49b30bf658f8f (MD5) Made available in DSpace on 2011-06-30T17:10:18Z (GMT). No. of bitstreams: 1 1978_munninghoff.pdf: 9237084 bytes, checksum: 315060c119e5294201f49b30bf658f8f (MD5) Previous issue date: 1978 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-06-30T17:10:18Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:32:31-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis Thesis U of I Only 311916 Ion and electron temperatures in the topside ionosphere Dissertation / Thesis text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.