Journal article
Tests of collision operators using laboratory measurements of shear Alfvén wave dispersion and damping
Physics of plasmas, Vol.16(5), pp.052110-052110-11
05/2009
DOI: 10.1063/1.3140037
Abstract
Measurements of shear Alfvén waves are used to test the predictions of a variety of different electron collision operators, including several Krook collision operators as well as a Lorentz collision operator. New expressions for the collisional warm-plasma dielectric tensor resulting from the use of the fully magnetized collisional Boltzmann equation are presented here. Theoretical predictions for the parallel phase velocity and damping as a function of perpendicular wave number
k
⊥
are derived from the dielectric tensor. Laboratory measurements of the parallel phase velocity and damping of shear Alfvén waves were made to test these theoretical predictions in both the kinetic
(
v
t
e
⪢
v
A
)
and inertial
(
v
t
e
⪡
v
A
)
parameter regimes and at several wave frequencies
(
ω
<
ω
c
i
)
. Results show that, in the inertial regime, the best match between measurements and theory occur when any of the Krook operators are used to describe electron collisions. In contrast, the best agreement in the kinetic regime is found when collisions are completely ignored.
Details
- Title: Subtitle
- Tests of collision operators using laboratory measurements of shear Alfvén wave dispersion and damping
- Creators
- D. J Thuecks - University of IowaC. A Kletzing - University of IowaF Skiff - University of IowaS. R Bounds - University of IowaS Vincena - University of California at Los Angeles
- Resource Type
- Journal article
- Publication Details
- Physics of plasmas, Vol.16(5), pp.052110-052110-11
- DOI
- 10.1063/1.3140037
- ISSN
- 1070-664X
- eISSN
- 1089-7674
- Number of pages
- 11
- Grant note
- DE-FG02-06ER54890 / DOE ATM 03-17310 / NSF
- Language
- English
- Date published
- 05/2009
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199794102771
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