Excitation of Atoms by Multiply Charged Ions

Janev, R. K.

doi:10.1007/978-3-642-58580-7_13

Cited by 3 publications

(3 citation statements)

References 33 publications

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“…This aging is dependent on the density of the plasma and occurs primarily because of the different charge‐exchange rates and Coulomb‐collision scattering for each ion species (see, for example, Figure 4 of Fok et al . [] and also Chen [], Smith and Bewtra [], Janev and Smith [], Kistler et al . [], and Ebihara et al .…”

Section: Introductionmentioning

confidence: 99%

“…Injected plasma "ages" as it drifts. This aging is dependent on the density of the plasma and occurs primarily because of the different charge-exchange rates and Coulomb-collision scattering for each ion species (see, for example, Figure 4 of Fok et al [1991] and also Chen [1970], Smith and Bewtra [1978], Janev and Smith [1993], Kistler et al [1998], and Ebihara et al [1998]). These losses result in changes in the composition that are energy (i.e., drift) dependent [Ferradas et al, 2015;Kistler and Mouikis, 2016].…”

Section: Introductionmentioning

confidence: 99%

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The complex nature of storm‐time ion dynamics: Transport and local acceleration

Denton

Reeves

Thomsen

et al. 2016

Geophysical Research Letters

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Data from the Van Allen Probes Helium, Oxygen, Proton, and Electron (HOPE) spectrometers reveal hitherto unresolved spatial structure and dynamics in ion populations. Complex regions of O+ dominance, at energies from a few eV to >10 keV, are observed throughout the magnetosphere. Isolated regions on the dayside that are rich in energetic O+ might easily be interpreted as strong energization of ionospheric plasma. We demonstrate, however, that both the energy spectrum and the limited magnetic local time extent of these features can be explained by energy‐dependent drift of particles injected on the nightside 24 h earlier. Particle tracing simulations show that the energetic O+ can originate in the magnetotail, not in the ionosphere. Enhanced wave activity is colocated with the heavy ion‐rich plasma, and we further conclude that the waves were not a source of free energy for accelerating ionospheric plasma but rather the consequence of the arrival of substorm‐injected plasma.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The complex nature of storm‐time ion dynamics: Transport and local acceleration

Denton

Reeves

Thomsen

et al. 2016

Geophysical Research Letters

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“…Cross-sections for these collisions come from Janev & Smith (1993). Radiative recombination is negligible in the temperature range of interest.…”

Section: Neutrals Modelmentioning

confidence: 99%

MCTrans++: a 0-D model for centrifugal mirrors

Schwartz,

Abel,

Hassam

et al. 2024

J. Plasma Phys.

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The centrifugal mirror confinement scheme incorporates supersonic rotation of a plasma into a magnetic mirror device. This concept has been shown experimentally to drastically decrease parallel losses and increase plasma stability as compared with prior axisymmetric mirrors. MCTrans++ is a dimensionless (0-D) scoping tool which rapidly models experimental operating points in the Centrifugal Mirror Fusion Experiment (CMFX) at the University of Maryland. In the low-collisionality regime, parallel losses can be modelled analytically. A confining potential is set up that is partially ambipolar and partially centrifugal. Due to the stabilizing effects of flow shear, the perpendicular losses can be modelled as classical. Radiation losses such as bremsstrahlung and cyclotron emission are taken into account. A neutrals model is included, and, in some circumstances, charge-exchange losses are found to exceed all other loss mechanisms. We use the SUNDIALS ARKODE library to solve the underlying equations of this model; the resulting software is suitable for scanning large parameter spaces, and can also be used to model time-dependent phenomena such as a capacitive discharge. MCTrans++ has been used to verify results from prior centrifugal mirrors, create an experimental plan for CMFX and find configurations for future reactor-scale fusion devices.

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Highly Charged Ion Collision Processes in High Temperature Fusion Plasmas

Tawara

2003

The Physics of Multiply and Highly Charged Ions

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Excitation of Atoms by Multiply Charged Ions

Cited by 3 publications

References 33 publications

The complex nature of storm‐time ion dynamics: Transport and local acceleration

The complex nature of storm‐time ion dynamics: Transport and local acceleration

MCTrans++: a 0-D model for centrifugal mirrors

Highly Charged Ion Collision Processes in High Temperature Fusion Plasmas

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