Results 11 to 20 of about 11,148 (232)

Carbon chemistry in Galactic Bulge Planetary Nebulae [PDF]

open access: yes, 2010
Galactic Bulge Planetary Nebulae show evidence of mixed chemistry with emission from both silicate dust and PAHs. This mixed chemistry is unlikely to be related to carbon dredge up, as third dredge-up is not expected to occur in the low mass Bulge stars.
A. A. Zijlstra   +67 more
core   +2 more sources

A Sensitivity Study of the Enceladus Torus [PDF]

open access: yes, 2009
We have developed a homogeneous model of physical chemistry to investigate the neutral-dominated, water-based Enceladus torus. Electrons are treated as the summation of two isotropic Maxwellian distributions$-$a thermal component and a hot component. The
B. L. Fleshman   +54 more
core   +1 more source

Advances in boronization on NSTX-Upgrade

open access: yesNuclear Materials and Energy, 2017
Boronization has been effective in reducing plasma impurities and enabling access to higher density, higher confinement plasmas in many magnetic fusion devices. The National Spherical Torus eXperiment, NSTX, has recently undergone a major upgrade to NSTX-
C. H Skinner   +7 more
doaj   +1 more source

Effect of boronization on plasma-facing graphite surfaces and its correlation with the plasma behavior in NSTX-U

open access: yesNuclear Materials and Energy, 2018
Boronization is a Plasma Facing Component (PFC) conditioning technique widely used in tokamak machines. The National Spherical Torus Experiment-Upgrade (NSTX-U) applied this conditioning, using a plasma glow with a deuterated Trimethyl-boron (d-TMB) and ...
F. Bedoya   +5 more
doaj   +1 more source

Synthesis of catalytic cobalt-containing coatings on alloy AL25 surface by plasma electrolytic oxidation

open access: yesХімія, фізика та технологія поверхні, 2017
The study aims at the investigation of the influence of electrolyte composition and plasma electrolytic oxidation modes on the composition and morphology of a mixed aluminum and cobalt oxides at the AL25 alloy.
M. V. Ved'   +3 more
doaj   +1 more source

O-bearing Molecules in Carbon-rich Proto-Planetary Objects [PDF]

open access: yes, 2000
We present ISO LWS observations of the proto-planetary nebula CRL 618, a star evolving very fast to the planetary nebula stage. In addition to the lines of 12CO, 13CO, HCN and HNC, we report on the detection of H2O and OH emission together with the fine ...
Cernicharo, J.   +2 more
core   +3 more sources

A Detailed Kinematic Map of Cassiopeia A's Optical Main Shell and Outer High-Velocity Ejecta [PDF]

open access: yes, 2013
We present three-dimensional kinematic reconstructions of optically emitting material in the young Galactic supernova remnant Cassiopeia A (Cas A). These Doppler maps have the highest spectral and spatial resolutions of any previous survey of Cas A and ...
Fesen, Robert A., Milisavljevic, Dan
core   +3 more sources

Oxygen torus and warm plasma cloak: a review

open access: yesFrontiers in Astronomy and Space Sciences
This paper reviews past observational studies of low-energy ion populations in the Earth’s magnetosphere, known as the oxygen torus and the warm plasma cloak.
Masahito Nosé, Naomi Maruyama
doaj   +1 more source

Cassini UVIS Observations of the Io Plasma Torus. IV. Modeling Temporal and Azimuthal Variability

open access: yes, 2007
In this fourth paper in a series, we present a model of the remarkable temporal and azimuthal variability of the Io plasma torus observed during the Cassini encounter with Jupiter.
A.J. Steffl   +74 more
core   +1 more source

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