Results 21 to 30 of about 6,093,819 (293)

Study of electron density and pressure profile behavior in a tokamak plasma [PDF]

open access: yes, 1989
Simultaneous determinations of local electron density and magnetic flux surface in a tokamak plasma have been made feasible with multichannel interferometry using a new asymmetric Abel inversion method.
H.K. Park   +5 more
core   +1 more source

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

open access: yesNuclear 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   +15 more
doaj   +1 more source

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

open access: yesAnnals 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

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

open access: yesPhysical 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   +5 more
doaj   +1 more source

Measurement of the electron-density profile in a discharge-ablated capillary waveguide.

open access: yes, 2016
We present the results of time-resolved interferometric measurements of the electron-density profile in a discharge-ablated capillary waveguide. We observe the development of a pronounced axial minimum in the electron-density profile with a relative ...

core   +1 more source

Advanced microwave method for electron density profile reconstruction of an atmospheric plasma torch [PDF]

open access: yes
Microwave interferometry is a reliable, well established, and non-perturbing method to measure the line-integrated electron density of a non-uniform plasma through the phase shift of a wave that propagates the plasma medium.
Ramisch, Mirko   +7 more
core   +2 more sources

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

open access: yesJournal 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

The Accuracy of Real-Time hmF2 Estimation from Ionosondes

open access: yesRemote Sensing, 2020
A total of 4991 ionograms recorded from April 1997 to December 2017 by the Millstone Hill Digisonde (42.6°N, 288.5°E) were considered, with simultaneous Ne(h)[ISR] profiles recorded by the co-located Incoherent Scatter Radar (ISR).
Carlo Scotto, Dario Sabbagh
doaj   +1 more source

Microbiome‐blood–brain barrier interactions in aging — mechanisms and therapeutic potential

open access: yesFEBS Letters, EarlyView.
Aging reshapes the gut microbiome (↓SCFA‐producing commensals; ↑pro‐inflammatory outputs), shifting circulating metabolites (↓SCFAs; ↑LPS, ↑TMAO, ↑PAA) that act at the BBB to increase nonspecific transcytosis, alter transport, and promote astrocyte reactivity, heightening brain vulnerability.
Daniel Cuervo‐Zanatta   +3 more
wiley   +1 more source

The March and April 2023 ionospheric storms over Europe

open access: yesFrontiers in Astronomy and Space Sciences
This paper presents a deep and comprehensive multi-instrumental analysis of two distinct ionospheric storms occurring in March and April 2023. We investigate the ionospheric response in the middle-latitudinal European region utilizing ionospheric ...
Zbyšek Mošna   +11 more
doaj   +1 more source

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