The gyrokinetic turbulence code GS2 was used to investigate the effects of plasma β on linear, collisionless ion temperature gradient (ITG) modes and trapped electron modes (TEM) in National Compact Stellarator Experiment (NCSX) geometry. Plasma β affects stability in two ways: through the equilibrium and through magnetic fluctuations. The first was studied here by comparing ITG and TEM stability in two NCSX equilibria of differing β values, revealing that the high β equilibrium was marginally more stable than the low β equilibrium in the adiabatic-electron ITG mode case. However, the high β case had a lower kinetic-electron ITG mode critical gradient. Electrostatic and electromagnetic ITG and TEM mode growth rate dependencies on temperature gradient and density gradient were qualitatively similar. The second β effect is demonstrated via electromagnetic ITG growth rates' dependency on GS2's β input parameter. A linear benchmark with gyrokinetic codes GENE and GKV-X is also presented.
Skip Nav Destination
,
,
,
,
Article navigation
December 2012
Research Article|
December 12 2012
Gyrokinetic studies of the effect of β on drift-wave stability in the National Compact Stellarator Experiment
J. A. Baumgaertel;
J. A. Baumgaertel
1
Los Alamos National Laboratory
, Los Alamos, New Mexico 87544, USA
Search for other works by this author on:
G. W. Hammett;
G. W. Hammett
2
Princeton Plasma Physics Laboratory
, Princeton, New Jersey 08543, USA
Search for other works by this author on:
D. R. Mikkelsen;
D. R. Mikkelsen
2
Princeton Plasma Physics Laboratory
, Princeton, New Jersey 08543, USA
Search for other works by this author on:
M. Nunami;
M. Nunami
3
National Institute for Fusion Science
, Toki, Gifu 509-5292, Japan
Search for other works by this author on:
P. Xanthopoulos
P. Xanthopoulos
4
Max-Planck-Institut für Plasmaphysik
, EURATOM Association, Teilinstitut Greifswald
, Wendelsteinstr. 1, 17491 Greifswald, Germany
Search for other works by this author on:
J. A. Baumgaertel
1
G. W. Hammett
2
D. R. Mikkelsen
2
M. Nunami
3
P. Xanthopoulos
4
1
Los Alamos National Laboratory
, Los Alamos, New Mexico 87544, USA
2
Princeton Plasma Physics Laboratory
, Princeton, New Jersey 08543, USA
3
National Institute for Fusion Science
, Toki, Gifu 509-5292, Japan
4
Max-Planck-Institut für Plasmaphysik
, EURATOM Association, Teilinstitut Greifswald
, Wendelsteinstr. 1, 17491 Greifswald, Germany
Phys. Plasmas 19, 122306 (2012)
Article history
Received:
September 20 2012
Accepted:
November 26 2012
Citation
J. A. Baumgaertel, G. W. Hammett, D. R. Mikkelsen, M. Nunami, P. Xanthopoulos; Gyrokinetic studies of the effect of β on drift-wave stability in the National Compact Stellarator Experiment. Phys. Plasmas 1 December 2012; 19 (12): 122306. https://doi.org/10.1063/1.4771587
Download citation file:
Pay-Per-View Access
$40.00
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Citing articles via
Progress toward fusion energy breakeven and gain as measured against the Lawson criterion
Samuel E. Wurzel, Scott C. Hsu
A review of plasma acceleration and detachment mechanisms in propulsive magnetic nozzles
Kunlong Wu, Zhiyuan Chen, et al.
Comparison of laser-produced plasma spatio-temporal electron density evolution measured using interferometry with simulation results
Mathew P. Polek, Tirtha R. Joshi, et al.
Related Content
Simulating gyrokinetic microinstabilities in stellarator geometry with GS2
Phys. Plasmas (December 2011)
Comparing linear ion-temperature-gradient-driven mode stability of the National Compact Stellarator Experiment and a shaped tokamak
Phys. Plasmas (February 2013)
Identification of electrostatic microinstability maps in quasi-axisymmetric stellarator
Phys. Plasmas (May 2022)
Verification of gyrokinetic microstability codes with an LHD configuration
Phys. Plasmas (November 2014)