Zobrazeno 1 - 10
of 101
pro vyhledávání: '"Stuart R. Hudson"'
Publikováno v:
Journal of Plasma Physics
Anisotropic heat conduction in a plasma embedded in a magnetic field with irregular, possibly chaotic, field lines is discussed. If the collisional mean free path exceeds the electron gyroradius, the heat conductivity is much larger along the field l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f6d3a4efa61115ae470ac95529f5fa82
https://hdl.handle.net/21.11116/0000-000A-20C8-021.11116/0000-000A-20CA-E
https://hdl.handle.net/21.11116/0000-000A-20C8-021.11116/0000-000A-20CA-E
Publikováno v:
Entropy, Vol 10, Iss 4, Pp 621-634 (2008)
The concept of plasma relaxation as a constrained energy minimization is reviewed. Recent work by the authors on generalizing this approach to partially relaxed threedimensional plasma systems in a way consistent with chaos theory is discussed, with
Externí odkaz:
https://doaj.org/article/ddf8d173ebcc4876bf6fc9656fd78b81
Adjoint methods can speed up stellarator optimisation by providing gradient information more efficiently compared with finite-difference evaluations. Adjoint methods are herein applied to vacuum magnetic fields, with objective functions targeting qua
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca07c95e9a5d98952aff6759043b3df1
http://arxiv.org/abs/2108.11433
http://arxiv.org/abs/2108.11433
The Stepped Pressure Equilibrium Code (SPEC) [Hudson et al., Phys. Plasmas 19, 112502 (2012)] has been successful in the construction of equilibria in 3D configurations that contain a mixture of flux surfaces, islands and chaotic magnetic field lines
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a280509c2f8a59a05785e7e3b2cdaa8d
http://arxiv.org/abs/2108.02056
http://arxiv.org/abs/2108.02056
One common approach to computing the magnetic field produced by a filamentary current-carrying coil is to approximate the coil as a series of straight segments. The Biot–Savart field from each straight segment is analytically known. However, if the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed849054c37ea906617916f201218b98
http://arxiv.org/abs/2105.12522
http://arxiv.org/abs/2105.12522
Publikováno v:
Journal of Plasma Physics. 87
Publikováno v:
Journal of Plasma Physics
Combined plasma-coil optimization approaches for designing stellarators are discussed and a new method for calculating free-boundary equilibria is proposed. Four distinct categories of stellarator optimization, two of which are novel approaches, are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::897a6783d8c38d7ea8cdefdb51615816
http://arxiv.org/abs/2012.09278
http://arxiv.org/abs/2012.09278
Publikováno v:
Physics of Plasmas. 29:032513
General three-dimensional toroidal ideal magnetohydrodynamic equilibria with a continuum of nested flux surfaces are susceptible to forming singular current sheets when resonant perturbations are applied. The presence of singular current sheets indic
We present a sawtooth model that explains observations where the central safety factor, $q_0$, stays well below one, which is irreconcilable with current models that predict a reset to $q_0=1$ after the crash. We identify the structure of the field a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::181b2f082d147f9f76e4c9f55a534f5a
http://arxiv.org/abs/2007.04529
http://arxiv.org/abs/2007.04529
A new stellarator coil design code is introduced that optimizes the position and winding pack orientation of finite-build coils. The new code, called flexible optimized curves in space using automatic differentiation (AD) and finite build (FOCUSADD),
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e9bcf2774239656cf25c562623d71891