A Persistent Depletion of Plasma Ions Within Jupiter's Auroral Polar Caps

2020 ◽  
Vol 47 (23) ◽  
Author(s):  
C. J. Pollock ◽  
R. W. Ebert ◽  
F. Allegrini ◽  
F. Bagenal ◽  
D. J. McComas ◽  
...  
Keyword(s):  
Plasma Ions ◽  
Polar Caps

scholarly journals Magnetospheric Structure of Rotation-Powered Neutron Stars

1992 ◽  
Vol 128 ◽  
pp. 56-77 ◽  
Author(s):  
Jonathan Arons
Keyword(s):  
Radio Emission ◽  
Gamma Radiation ◽  
Heavy Ions ◽  
Theoretical Work ◽  
Future Research ◽  
Observational Constraints ◽  
Polar Caps ◽  
Recent Theoretical Work ◽  
Density Flow ◽  
Promising Avenue

AbstractI survey recent theoretical work on the structure of the magnetospheres of rotation-powered pulsars, within the observational constraints set by their observed spindown, their ability to power synchrotron nebulae and their ability to produce beamed collective radio emission, while putting only a small fraction of their energy into incoherent X- and gamma radiation. I find no single theory has yet given a consistent description of the magnetosphere, but I conclude that models based on a dense outflow of pairs from the polar caps, permeated by a lower density flow of heavy ions, are the most promising avenue for future research.

scholarly journals Polar caps and auroral zones under idealized axisymmetric magnetic fields

2021 ◽  
Vol 67 (10) ◽  
pp. 3228-3236
Author(s):  
Angel O.U. Parentis ◽  
Bruno S. Zossi ◽  
Hagay Amit ◽  
Ana G. Elias
Keyword(s):  
Magnetic Fields ◽  
Polar Caps

scholarly journals The Evolution of the Solar Magnetic Field

2012 ◽  
Vol 10 (H16) ◽  
pp. 86-89 ◽  
Author(s):  
J. Todd Hoeksema
Keyword(s):  
Magnetic Field ◽  
Solar Cycle ◽  
Solar Magnetic Field ◽  
Coronal Holes ◽  
Active Regions ◽  
Statistical Characteristics ◽  
Field Pattern ◽  
Small Scale ◽  
Polar Caps ◽  
Magnetic Elements

AbstractThe almost stately evolution of the global heliospheric magnetic field pattern during most of the solar cycle belies the intense dynamic interplay of photospheric and coronal flux concentrations on scales both large and small. The statistical characteristics of emerging bipoles and active regions lead to development of systematic magnetic patterns. Diffusion and flows impel features to interact constructively and destructively, and on longer time scales they may help drive the creation of new flux. Peculiar properties of the components in each solar cycle determine the specific details and provide additional clues about their sources. The interactions of complex developing features with the existing global magnetic environment drive impulsive events on all scales. Predominantly new-polarity surges originating in active regions at low latitudes can reach the poles in a year or two. Coronal holes and polar caps composed of short-lived, small-scale magnetic elements can persist for months and years. Advanced models coupled with comprehensive measurements of the visible solar surface, as well as the interior, corona, and heliosphere promise to revolutionize our understanding of the hierarchy we call the solar magnetic field.

Charge exchange of multiply charged laser plasma ions with rare-gas jet atoms

2007 ◽  
Vol 37 (11) ◽  
pp. 1060-1064 ◽  
Author(s):  
I L Beigman ◽  
V E Levashov ◽  
K N Mednikov ◽  
A S Pirozhkov ◽  
E N Ragozin ◽  
...  
Keyword(s):  
Charge Exchange ◽  
Laser Plasma ◽  
Gas Jet ◽  
Rare Gas ◽  
Plasma Ions ◽  
Multiply Charged

Condensed Surfaces of Magnetic Neutron Stars and Particle Acceleration Above Pulsar Polar Caps

2008 ◽  
Author(s):  
Zach Medin ◽  
Dong Lai ◽  
C. Bassa ◽  
Z. Wang ◽  
A. Cumming ◽  
...  
Keyword(s):  
Particle Acceleration ◽  
Neutron Stars ◽  
Polar Caps

scholarly journals Mass-Charge and Energy Spectra of Oxygen Ions in a Two-Element Laser-Produced Plasma

2008 ◽  
Vol 2008 ◽  
pp. 1-5 ◽  
Author(s):  
R. T. Khaydarov ◽  
U. S. Kunishev
Keyword(s):  
Laser Radiation ◽  
Heavy Elements ◽  
Energy Spectra ◽  
Heavy Component ◽  
Main Attention ◽  
Plasma Ions ◽  
Oxygen Ions ◽  
Target Composition ◽  
The Given ◽  
Flight Measurements

Using a static mass spectrometer, we study the characteristics of multicharge plasma ions generated from solid targets under the action of a 15 nanosecond Nd:YAG laser radiation with maximal intensity 1011 W/cm2. We consider two-element solid targets with a mass of the heavy component ranging from 44.9 (Sc) to 174.9 (Lu) with main attention to the properties of oxygen ions. The time-of-flight measurements show that oxygen ions are obtained in the range of the energy E = 40–250 eV with maximal charge Zmax=2. The latter is independent on the target composition for the given intensity of the laser radiation. However, the properties of the energy spectra of oxygen ions strongly depend on the second component of the target, which is explained by the interaction between the light and heavy elements of the target.

scholarly journals Ion heating due to ionization and recombination

2008 ◽  
Vol 26 (1) ◽  
pp. 37-40 ◽  
Author(s):  
R. G. Evans
Keyword(s):  
Time Dependent ◽  
Ion Heating ◽  
Plasma Ions ◽  
Recombination Processes ◽  
Gain Energy

AbstractThe charge on plasma ions may fluctuate due to random ionization and recombination processes. The resulting motion has a time dependent Hamiltonian and in simple cases, the ions steadily gain energy. Quantitative rates are estimated for some cases involving high Z plasmas.

The entry of solar protons over the polar caps

1971 ◽  
Vol 19 (11) ◽  
pp. 1541-1577 ◽  
Author(s):  
G.E. Morfill ◽  
J.J. Quenby
Keyword(s):  
Polar Caps

Thermal emission areas of heated neutron star polar caps

2007 ◽  
pp. 419-422
Author(s):  
M. Ruderman ◽  
A. M. Beloborodov
Keyword(s):  
Neutron Star ◽  
Thermal Emission ◽  
Polar Caps
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