Results 21 to 30 of about 5,737,181 (292)

The F1 ledge: density, height and slope

Annals of Geophysics, 1996
Diurnal variations of the F1 region ionization at 170 km altitude and the slope ?170 = dN/dh at this height are analyzed for mid-latitude and equatorial stations: Millstone Hill, Ramey, Puerto Madryn and Jicamarca. Both the density N(t) and the slope ?(t)
X. Huang, B. W. Reinisch
doaj   +1 more source

A Density Functional Theory for the Average Electron Energy [PDF]

, 2022
A formally exact density functional theory (DFT) determination of the average electron energy is presented. Our theory, which is based on a different accounting of energy functional terms, partially solves one well known downside of conventional Kohn ...
Stefano, Racioppi, Martin, Rahm, Per, Hyldgaard, Phalgun, Lolur   +3 more
core   +2 more sources

Effects of geomagnetic mirror force and pitch angles of precipitating electrons on ionization of the polar upper atmosphere [PDF]

Annales Geophysicae
We studied the effects of the geomagnetic mirror force on electron density enhancements in the polar atmosphere due to energetic electron precipitation.
T. M. Tanaka, T. M. Tanaka, Y. Ogawa, Y. Ogawa, Y. Katoh, M. Fukizawa, A. Artemyev, V. Angelopoulos, X.-J. Zhang, Y. Tanaka, Y. Tanaka, Y. Tanaka, A. Kadokura, A. Kadokura   +13 more
doaj   +1 more source

Underdense plasma lens with a transverse density gradient

Physical Review Accelerators and Beams, 2023
We explore the implications of a transverse density gradient on the performance of an underdense plasma lens and nonlinear plasma-based accelerator. Transverse density gradients are unavoidable in plasma sources formed in the outflow of standard gas jets,
C. E. Doss, R. Ariniello, J. R. Cary, S. Corde, H. Ekerfelt, E. Gerstmayr, S. J. Gessner, M. Gilljohann, C. Hansel, B. Hidding, M. J. Hogan, A. Knetsch, V. Lee, K. Marsh, B. O’Shea, P. San Miguel Claveria, D. Storey, A. Sutherland, C. Zhang, M. D. Litos   +19 more
doaj   +1 more source

Characteristics of electron temperature profile stiffness in electron-heated plasmas on EAST

Nuclear Fusion, 2022
A very high core electron temperature ( T _e0 ∼ 10 keV) plasma has been established and stably sustained by applying both lower hybrid wave (LHW) and on-axis electron cyclotron resonance heating (ECRH) in the Experimental Advanced Superconducting Tokamak
J.W. Liu, Q. Zang, Y. Liang, Y.H. Huang, E.Z. Li, L.Q. Xu, A. Knieps, Y.Q. Chu, Y. Chao, Y.C. Hu, Y.F. Jin, H.Q. Liu, H.L. Zhao, B. Lyu, X.Z. Gong, the EAST Team   +15 more
doaj   +1 more source

The estimation of D-region electron densities from riometer data [PDF]

, 2003
International audienceAt high latitude the hard electron precipitation associated with auroral activity is a major source of ionization for the D-region, one consequence being the absorption of radio waves.
M. Friedrich, Hargreaves, J. K., J. K. Hargreaves, Friedrich, M.   +3 more
core   +2 more sources

Vertical electron density profiles from digisonde ionograms. The average representative profile

Annals of Geophysics, 1996
Profile calculations from ionograms using the Huang-Reinisch technique arrive at a set of boundary values and coefficients that describe the profile.
B. W. Reinisch, X. Huang
doaj   +1 more source

In situ and ground-based intercalibration measurements of plasma density at l = 2.5 [PDF]

, 2003
[1] Two independent ground-based experiments and two satellite-borne experiments are used to interpret the changes in plasmaspheric composition at the same point in space during moderate geomagnetic activity on 22 January and 14 February 2001.
Bailey, G.J., Menk, F.W., Mann, I.R., Rose, M.C., Wilford, C.R., Milinevski, G., Reinisch, B.W., Thomson, N.R., Goldstein, J., Clilverd, M.A., Yearby, K.H., Carpenter, D.L., Sandel, B.R.   +12 more
core   +1 more source

Optimization of laser-plasma injector via beam loading effects using ionization-induced injection

Physical Review Accelerators and Beams, 2018
Simulations of ionization-induced injection in a laser driven plasma wakefield show that high-quality electron injectors in the 50–200 MeV range can be achieved in a gas cell with a tailored density profile.
P. Lee, G. Maynard, T. L. Audet, B. Cros, R. Lehe, J.-L. Vay   +5 more
doaj   +1 more source

Comparison of COSMIC measurements with the IRI-2007 model over the eastern Mediterranean region

Journal of Advanced Research, 2013
This paper presents a comparison of the International Reference Ionosphere (IRI-2007) model over the eastern Mediterranean region with peak ionospheric characteristics (foF2–hmF2) and electron density profiles measured by FORMOSAT-3/COSMIC satellites in ...
P. Vryonides, H. Haralambous
doaj   +1 more source