Numerical study of weakly unstable electron plasma oscillations
Unstable electron plasma initial value problem solved by numerically integrating Vlasov equation in one dimension
Armstrong, T. P.↗
Engineering topics
Armstrong, T. P.
Publications and source records attributed to Armstrong, T. P..
Numerical study of weakly unstable electron plasma oscillations
Vlasov equation for solving initial value problem for unstable electron plasma
Armstrong, T. P.↗
Observations of the solar particle event of 7 July 1966 with University of Iowa detectors.
Time histories of Mev proton and alpha particle intensities during and after July 7, 1966 solar flare, noting abundance ratio and geophysical effects
Armstrong, T. P.↗
Solar particle observations inside the magnetosphere during the 7 July 1966 proton flare event.
Protons emitted by July 7, 1966 solar flare observed by low altitude high latitude Injun 4 satellite
Armstrong, T. P.↗
Observations of protons in the magnetosphere and magnetotail with Explorer 33.
Protons in magnetosphere and magnetotail observed with silicon detector on Explorer 33
Armstrong, T. P.↗
Venus - An upper limit on intrinsic magnetic dipole moment based on absence of a radiation belt.
Intrinsic magnetic dipole moment of Venus based on absence of radiation belt electrons
Armstrong, T. P.↗
Venus - An upper limit on intrinsic magnetic dipole moment based on absence of a radiation belt
Explore the source record for details and available documents.
Armstrong, T. P.↗
Solar particle observations inside the magnetosphere during the 7 July 1966 event
Injun satellite observations of solar particles inside magnetosphere
Armstrong, T. P.↗
Simultaneous observations of solar protons inside and outside the magnetosphere.
Low energy protons emitted by solar flare satellite observed inside and outside of magnetosphere, noting immediate access to polar caps
POLAR CAP ABSORPTION↗
Numerical studies of the nonlinear Vlasov equation.
Collisionless electron plasma dynamics in one dimension, investigating nonlinear Vlasov equation for Landau damping and instability
ELECTRON PLASMA↗
Simultaneous observations of solar protons inside and outside the magnetosphere Progress report
Simultaneous observations of solar protons inside and outside magnetosphere by Explorer XXXIII AND Injun IV
SOLAR PROTON↗
Observations of protons in the magnetosphere with Mariner 4.
Low energy proton measurements in magnetosphere using Mariner IV spacecraft
ENERGY SPECTRUM↗
Numerical Studies of the Non-linear Vlasov Equation
The subject of this dissertation is the numerical integration of the initial-value problem for the non-linear Vlasov equation. The Vlasov equation is used to describe the dynamics of a "collisionless", one-dimensional, classical electron gas confined between two perfectly reflecting boundaries. Only the long-range Coulomb interactions of the electrons are considered; effects associated with the discrete structure are neglected. The numerical results obtained for non-linear Landau damping compare well with similar results obtained by Knorr. A general statement of the results on stable initial conditions is: As the degree of non-linearity of the initial conditions is increased, the deviation from linear Landau damping appears sooner and is more severe. In some cases damping was observed to cease. Curves showing the time dependence of the damping decrement are derived and compared with predictions of non-linear theories. New results obtained in this study include the observation that for strongly non-linear cases, the damping of the electric field causes an initially Maxwellian fo (v, O) to develop a peak in the neighborhood of the phase velocity; strong growth of the second harmonic is seen after fo (v, t) develops such a peak. Also new in this study is the interpretation of the development of a certain class of strongly unstable initial conditions as approaching an inhomogeneous equilibrium.
NUMERICAL INTEGRATION↗
Observations of protons in the magnetosphere with Mariner IV
Mariner IV low energy proton measurements of magnetosphere
MAGNETOSPHERE↗