Results 271 to 280 of about 1,568,609 (304)

A high density pulsed ion trap

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1995
Abstract By exploiting the synergy of two discharges in low pressure gases or gaseous mixtures, a pulsed electron beam with exceptional radial stability has been obtained having a diameter less than 50 μm over 40 mm. It acts as a pulsed high density ion trap for the ions created by electron impact along the beam.
M. Ganciu, I.I. Popescu, V. Zoran, A.M. Pointu   +3 more
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Ion-density measurements in the stratosphere

Journal of Geophysical Research, 1960
The number density of small negative ions in the atmosphere was measured in 1958 on a series of eight balloon flights which reached altitudes of 115,000 feet over Minneapolis (45°N). A pronounced decrease in the number density of small negative ions was observed at the tropopause on seven of the eight flights, and similar decreases were observed at ...
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High current density ion sources for heavy ion fusion accelerators

Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167), 2002
Testing of the alumino-silicate ion source and the contact ionizer at high current density was satisfactory. The dispensers embedded in the extraction electrode were capable of providing sufficient cesium vapor coverage to the ionizer thus shows a promising way of constructing an ionizer for long term heavy ion fusion applications.
J.W. Kwan, W.W. Chupp, S. Eylon
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Charge densities and quasi-ions in lattice dynamics

Physical Review B, 1985
In the preceding paper we have proposed a decomposition of the total charge density of a crystal into contributions which can be uniquely assigned to the individual ions or sublattices. This decomposition leads naturally to a definition of ``quasi-ions'' and a description of the chemical bonds in terms of partial charge densities of the respective ions.
, Falter, , Selmke, , Ludwig, , Kunc
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Spin density contribution in heavy-ion interaction potentials using energy density formalism

Physical Review C, 1991
The result of adding the spin density term in heavy-ion interaction potentials is studied for the first time, especially for unclosed shell nuclei. For the energy density functional of Skyrme interaction, the spin density contribution is derived for nuclei with an even number of valence particles (or holes).
, Puri, , Chattopadhyay, , Gupta
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Heavy Ion Collisions: Baryon Density Frontier

Physics of Particles and Nuclei, 2018
Actual problems on studying the phase QCD diagram in current and planned experiments are discussed. The need for a systematic study of states of the hadronic matter in regions of high baryon density is emphasized. The opportunities opened by experiments at the NICA complex are considered.
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Ionic recombination at high ion densities

Journal of Physics B: Atomic and Molecular Physics, 1981
It is shown that the Langevin-Harper formula for the ter-molecular ionic recombination coefficient alpha remains valid when the ion density ni is high (>1013 cm-3), there being a logical defect in a seemingly straightforward argument which leads to the contrary conclusion that this formula then overestimates alpha owing to the effect of Debye-Huckel ...
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Intracellularly Injected Cobaltous Ions Accumulate at Synaptic Densities

Science, 1980
Physiologically identified neurons in the locust were iontophoretically injected with a mixture of cobaltous and potassium ions. After being fixed for electron microscopy, 2.5-micrometer sections of the epoxy-embedded ganglia were intensified with silver. The intensified material was resectioned and examined in the electron microscope.
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Ultrahigh Charge Density Ion-Exchange Membranes

Electrochemical technologies play a crucial role in industries such as water treatment, resource recovery, energy storage, and power generation. With the growing demand for desalination, hydrogen fuel, and storage of renewable energy, the significance of these technologies will only continue to increase.
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Electroceramics for High-Energy Density Capacitors: Current Status and Future Perspectives

Chemical Reviews, 2021
ge wang, Zhilun Lu, Linhao Li
exaly