Zobrazeno 1 - 10
of 959
pro vyhledávání: '"C. C. Hegna"'
Publikováno v:
Physics of Plasmas, 29, 012303
Physics of Plasmas, 29(1):012303. American Institute of Physics
Physics of Plasmas, 29(1):012303. American Institute of Physics
The linear and nonlinear properties of ion-temperature-gradient-driven turbulence with adiabatic electrons are modeled for axisymmetric configurations for a broad range of triangularities δ, both negative and positive. Peak linear growth rates decre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5643bfa864ad043d3bb20fee6a38f46d
https://www.differ.nl/bibcite/reference/8866
https://www.differ.nl/bibcite/reference/8866
Publikováno v:
Annales Geophysicae, Vol 27, Pp 1129-1138 (2009)
In this work, we analyze the ballooning stability of the near-Earth plasma sheet prior to the initial expansion onset of the 23 March 2007 THEMIS substorm event. Using solar wind data from WIND satellite observation for the substorm event as an in
Externí odkaz:
https://doaj.org/article/1b8f267d5e98450bab02a98901803aac
Publikováno v:
Физика плазмы. 42:450-459
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ebf578f98eb32c2941b7d521fa065584
https://doi.org/10.7868/s0367292116050127
https://doi.org/10.7868/s0367292116050127
Autor:
S. R. Hudson, C. C. Hegna
Publikováno v:
Physics of Plasmas. 9:2014-2019
The impact of three-dimensional geometry on ideal magnetohydrodynamic ballooning mode stability is studied. By using a class of “local 3D equilibria” [C. C. Hegna, Phys. Plasmas 7, 3921 (2000)], the effects of plasma shaping, profile variations a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3fdec620a24b8a64ef7ba03bba191fe7
https://doi.org/10.1063/1.1446037
https://doi.org/10.1063/1.1446037
Autor:
C. C. Hegna, S. R. Hudson
Publikováno v:
Physics of Plasmas. 11:L53-L56
An expression determining how variations in the pressure gradient and average magnetic shear affect ballooning stability for a stellarator equilibrium is presented. The procedure for determining the marginal stability boundaries, for each field line,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa6bc291a5a50279bae3bcc36769b5db
https://doi.org/10.1063/1.1779227
https://doi.org/10.1063/1.1779227
Autor:
JaeChun Seol, C. C. Hegna
Publikováno v:
Physics of Plasmas. 11:3672-3675
The role of symmetry breaking on single particle orbits in near helically symmetric stellarators is investigated. In particular, the effect of a symmetry-breaking bumpy term is included in the analysis of trapped particle orbits. It is found that all
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::371dcb5c1a8e6d4771e4c91f7bfbef6f
https://doi.org/10.1063/1.1755706
https://doi.org/10.1063/1.1755706
Autor:
C. C. Hegna, S. R. Hudson
Publikováno v:
Physics of Plasmas. 10:4716-4727
A method for computing the ideal magnetohydrodynamic (MHD) stability boundaries in three-dimensional equilibria is employed. Following Hegna and Nakajima [Phys. Plasmas 5, 1336 (1998)], a two-dimensional family of equilibria is constructed by perturb
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a5c1a9755bd2602651d75738163024d
https://doi.org/10.1063/1.1622669
https://doi.org/10.1063/1.1622669
Autor:
C. C. Hegna
Publikováno v:
Physics of Plasmas. 6:3980-3989
An analytic theory of nonlinear pressure driven magnetic island evolution is presented which includes both neoclassical and curvature effects. This work differs from prior analytic treatments where large aspect ratio, small beta expansions were emplo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd6c7450baf2407b714274d481cc3ae8
https://doi.org/10.1063/1.873661
https://doi.org/10.1063/1.873661
Autor:
C. C. Hegna, N. Nakajima
Publikováno v:
Physics of Plasmas. 5:1336-1344
The stability properties of pressure-driven ballooning and Mercier modes in general stellarator configurations are studied. A perturbation method originally introduced to study tokamak stability by Greene and Chance [Nucl. Fusion 21, 453 (1981)] is g
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7400f838df9f1c746882ac28f90263d0
https://doi.org/10.1063/1.872793
https://doi.org/10.1063/1.872793