Results 11 to 20 of about 1,568,609 (304)

A stable local density functional approach to ion-ion correlations [PDF]

open access: yesEurophysics Letters (EPL), 2000
We propose a new approach for incorporating counterion correlations into Poisson-Boltzmann–like theories, which is based on a local density functional for the system of counterions. Our derivation is inspired by the Debye-Huckel approach to the one-component plasma (OCP). An artificial instability due to the OCP's homogeneous background charge—which is
Barbosa, M., Deserno, M., Holm, C.
openaire   +2 more sources

Measurement system for ion beam profiles using fixed parallel wires and Faraday cup array

open access: yesAIP Advances, 2022
The radial profiles of ion current density are measured using a combination of two techniques—fixed parallel wires and a Faraday cup array—in a ring cusp ion source. These measurements are carried out for Ar+ ion beam current in the range of 20–90 mA and
Bharat Singh Rawat   +4 more
doaj   +1 more source

Effects of Ingested vs. Injected Propellant on Radio-Frequency Discharge Plasma Properties

open access: yesFrontiers in Physics, 2019
Radio-frequency (RF) ion thrusters are characterized in vacuum test facilities differentiated by pumping speed and thus subject to varying levels of neutral propellant ingestion that affect plasma plume properties and artificially raise the pressure of ...
Natalie R. S. Caruso   +1 more
doaj   +1 more source

The Effect of Dust Particles on Ion Acoustic Solitary Waves in a Dusty Plasma [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2004
In this paper we have examined the effect of dust charge density on nonlinear ion acoustic solitary wave which propagates obliquely with respect to the external magnetic field in a dusty plasma.
Cheong Rim Choi   +2 more
doaj   +1 more source

Bridging the Molecular-Cellular Gap in Understanding Ion Channel Clustering

open access: yesFrontiers in Pharmacology, 2020
The clustering of many voltage-dependent ion channel molecules at unique neuronal membrane sites such as axon initial segments, nodes of Ranvier, or the post-synaptic density, is an active process mediated by the interaction of ion channels with scaffold
Valerie Abigail Nirenberg, Ofer Yifrach
doaj   +1 more source

Performance Analysis and Application of Lithium Ion Capacitors

open access: yes发电技术, 2022
As a new type of energy storage device, lithium ion capacitors not only have high energy density, but also have excellent power density and long cycle life. They have great application potential in high-power and long-life application scenarios. Firstly,
ZHENG Junsheng   +2 more
doaj   +1 more source

Negative ion density fronts [PDF]

open access: yesPhysics of Plasmas, 2001
Negative ions tend to stratify in electronegative plasmas with hot electrons (electron temperature Te much larger than ion temperature Ti, Te≫Ti). The boundary separating a plasma containing negative ions, and a plasma without negative ions, is usually thin so that the negative ion density falls rapidly to zero—forming a negative ion density front ...
openaire   +1 more source

Interhemispheric conjugate effect in longitude variations of mid-latitude ion density

open access: yesJournal of Space Weather and Space Climate, 2019
Earlier incoherent scatter radar measurements revealed upward topside ion fluxes in the summer and downward fluxes in the winter at mid-latitudes at night; a summer to winter interhemispheric coupling was accordingly inferred.
Chen Yiding   +3 more
doaj   +1 more source

Laser-driven shock acceleration of monoenergetic ion beams [PDF]

open access: yes, 2012
We show that monoenergetic ion beams can be accelerated by moderate Mach number collisionless, electrostatic shocks propagating in a long scale-length exponentially decaying plasma profile.
A. Stockem   +11 more
core   +2 more sources

Comparison between electropositive and electronegative cold atmospheric-pressure plasmas: a modelling study

open access: yesHigh Voltage, 2016
Cold atmospheric-pressure He + N(2) and He + O(2) plasmas are chosen as the representatives for electropositive and electronegative plasmas, of which the discharge characteristics are studied and then compared to each other by fluid models.
Ding Xin Liu   +5 more
doaj   +1 more source

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