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Full-Text Articles in Physical Sciences and Mathematics
Oscillation Of The Ionosphere At Planetary-Wave Periods, Jeffrey M. Forbes, Astrid Maute, Xiaoli Zhang, Maura E. Hagan
Oscillation Of The Ionosphere At Planetary-Wave Periods, Jeffrey M. Forbes, Astrid Maute, Xiaoli Zhang, Maura E. Hagan
All Physics Faculty Publications
F‐region ionospheric oscillations at planetary‐wave (PW) periods (2–20 days) are investigated, with primary focus on those oscillations transmitted to the ionosphere by PW modulation of the vertically propagating tidal spectrum. Tidal effects are isolated by specifically designed numerical experiments performed with the National Center for Atmospheric Research thermosphere‐ionosphere‐electrodynamics general circulation model for October 2009, when familiar PW and tides are present in the model. Longitude versus day‐of‐month perturbations in topside F‐region electron density (Ne) of order ±30–50% at PW periods occur as a result of PW‐modulated tides. At a given height, these oscillations are mainly due to vertical oscillations in …
Diffusive Electron Heat Flow And Temperature Variance Along Magnetic Field Lines, Michael Kushlan
Diffusive Electron Heat Flow And Temperature Variance Along Magnetic Field Lines, Michael Kushlan
Physics Capstone Projects
In this research we examine how electron heat moves along magnetic field lines and how this affects temperature variations in plasmas. Specifically we wrote FORTRAN code to solve the electron temperature equation numerically. We also solved the steady state electron temperature equation analytically using an integrating factor. We verified that the numerical and analytical solutions obtained the same result. Finally we calculated the standard deviation of temperature in our domain for the steady state. Gaussian legendre quadrature was used to integrate various functions. We represented our magnetic field and heat source with Fourier series. The sin and cosine coefficients for …
Strong Magnetic Field Effect On Over-The-Barrier Transport In Pb-P-Hg 1-Xcdxte Schottky Barriers, V. V. Radantsev, V. V. Zavyalov
Strong Magnetic Field Effect On Over-The-Barrier Transport In Pb-P-Hg 1-Xcdxte Schottky Barriers, V. V. Radantsev, V. V. Zavyalov
All Physics Faculty Publications
It is usually believed that the over-the-barrier current in Schottky barriers (SB) on p-type semiconductor is controlled by heavy holes. However, there is an additional potential barrier caused by an oxide layer inevitably existing at the interface in real SB. For typical parameters of the barrier, its tunnelling transparency for light holes can be higher by three orders of magnitude than that for heavy holes. Thus, one can expect that the current is mainly due to the contribution of light holes. To clarify this problem, the investigation of carrier transport in a magnetic field is used as a key experiment …
Magnetic Control Of Convection In Nonconducting Diamagnetic Fluids, J. Huang, D. D. Gray, Boyd F. Edwards
Magnetic Control Of Convection In Nonconducting Diamagnetic Fluids, J. Huang, D. D. Gray, Boyd F. Edwards
All Physics Faculty Publications
Inhomogeneous magnetic fields exert a body force on electrically nonconducting, diamagnetic fluids. This force can be used to compensate for gravity and to control convection. The field effect on convection is represented by a dimensionless vector parameter Rm=(μ0αχ0d3ΔT/ρ0νDT)(H⋅∇H)r=0ext, which measures the relative strength of the induced magnetic buoyancy force due to the applied field gradient. The vertical component of this parameter competes with the gravitational buoyancy effect and a critical relationship between this component and the Rayleigh number is identified for the onset of convection. …
Geophysical Measurements In The Beaver Basin, West-Central Utah; Part 1--Slingram, Magnetic, And Self-Potential Profiles, Vincent J. Flanigan, David L. Campbell, U.S. Geological Survey
Geophysical Measurements In The Beaver Basin, West-Central Utah; Part 1--Slingram, Magnetic, And Self-Potential Profiles, Vincent J. Flanigan, David L. Campbell, U.S. Geological Survey
All U.S. Government Documents (Utah Regional Depository)
This report consists of figures showing profile locations (fig. 1, table 1) in the Beaver Basin, west-central Utah, and ground geophysical data collected in September 1980 along these traverses (figs. 2-11). These data consist of slingram electromagnetic (real and imaginary components at 222, 444, 888, 1777, and 3555 Hz), ground magnetic and self-potential measurements collected at 200-foot (61-m) intervals along about 8.8 miles (14.2 km) of survey line. Table 2 lists equipment used. The report contains data only, and no interpretations of the data are included.