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Numerical modeling of Large Plasma Device Alfvén wave experiments using AstroGK
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10.1063/1.3309486
/content/aip/journal/pop/17/2/10.1063/1.3309486
http://aip.metastore.ingenta.com/content/aip/journal/pop/17/2/10.1063/1.3309486

Figures

Image of FIG. 1.
FIG. 1.

Normalized linear frequencies and damping rates in the collisionless limit for three methods: linear VM dispersion relation (dotted and long-dashed), linear GK dispersion relation (short-dashed), and linear AstroGK simulations (triangles). The top row (panels a and b) are results for kinetic Alfvén waves vs ; the bottom row (panels c and d), for inertial Alfvén waves vs . Two sets of VM solutions are presented in each regime, corresponding to the two driving frequencies used in the LAPD experiments (Ref. 38).

Image of FIG. 2.
FIG. 2.

Normalized linear frequencies (a) and damping rates (b) vs perpendicular wavenumber for kinetic Alfvén waves measured from LAPD experiments at driving frequency (crosses) and determined using linear AstroGK simulations using the advanced collision operator with (triangles). Also shown for comparison are the following collisionless results: VM dispersion relation for (dotted), GK dispersion relation (dashed), and linear AstroGK simulations in the collisionless limit (open squares).

Image of FIG. 3.
FIG. 3.

Normalized linear frequencies (a) and damping rates (b) vs perpendicular wavenumber for kinetic Alfvén waves measured from LAPD experiments at driving frequency (crosses) and determined using linear AstroGK simulations using the advanced collision operator with (triangles). Also shown for comparison are the following collisionless results: VM dispersion relation for (dotted), GK dispersion relation (dashed), and linear AstroGK simulations in the collisionless limit (open squares).

Image of FIG. 4.
FIG. 4.

Normalized linear frequencies (a) and damping rates (b) vs the perpendicular wavenumber for inertial Alfvén waves measured from LAPD experiments at driving frequency (crosses) and determined using linear AstroGK simulations using the advanced collision operator with (triangles). Also shown for comparison are the following collisionless results: VM dispersion relation for (dotted) and GK dispersion relation (dashed).

Image of FIG. 5.
FIG. 5.

Normalized linear frequencies (a) and damping rates (b) vs the perpendicular wavenumber for inertial Alfvén waves measured from LAPD experiments at driving frequency (crosses) and determined using linear AstroGK simulations using the advanced collision operator with (triangles) and with (open squares). Also shown for comparison are the following collisionless results: VM dispersion relation for (dotted) and GK dispersion relation (dashed).

Image of FIG. 6.
FIG. 6.

Normalized linear frequencies (a) and damping rates (b) vs perpendicular wavenumber for inertial Alfvén waves measured from LAPD experiments at driving frequency (crosses). Linear AstroGK simulation results shown here are “corrected” for finite frequency effects. The simulations used the advanced collision operator with (triangles) and with (open squares). Compare to the “uncorrected” results shown in Fig. 5.

Tables

Generic image for table
Table I.

The parameters for the singly ionized helium plasma used in the LAPD experiments to measure the frequency and damping rate of kinetic Alfvén waves and inertial Alfvén waves (Ref. 38). Note the definition of thermal velocity differs from the choice of Thuecks et al. (Ref. 38) by a factor of .

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/content/aip/journal/pop/17/2/10.1063/1.3309486
2010-02-22
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Numerical modeling of Large Plasma Device Alfvén wave experiments using AstroGK
http://aip.metastore.ingenta.com/content/aip/journal/pop/17/2/10.1063/1.3309486
10.1063/1.3309486
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