Zobrazeno 1 - 10
of 107
pro vyhledávání: '"Harold Weitzner"'
Autor:
Harold Weitzner, Wrick Sengupta
Steady plasma flows have been studied almost exclusively in systems with continuous symmetry or in open domains. In the absence of continuous symmetry, the lack of a conserved quantity makes the study of flows intrinsically challenging. In a toroidal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8cd6cde5bfea2906e3bde5b13c7bd916
http://arxiv.org/abs/2104.01387
http://arxiv.org/abs/2104.01387
Publikováno v:
Journal of Plasma Physics. 87
While several results have pointed to the existence of exactly quasisymmetric fields on a surface (Garren & Boozer, Phys. Fluids B, vol. 3, 1991, pp. 2805–2821; 2822–2834; Plunk & Helander, J. Plasma Phys., vol. 84, 2018, 905840205), we have obta
Understanding particle drifts in a non-symmetric magnetic field is of primary interest in designing optimized stellarators to minimize the neoclassical radial loss of particles. Quasisymmetry and omnigeneity, two distinct properties proposed to ensur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::98d2bd763ebc1e75924d5dfccf6b933b
Autor:
Wrick Sengupta, Harold Weitzner
Publikováno v:
Physics of Plasmas. 27:022509
Non-symmetric vacuum magnetic fields with closed magnetic field lines are of interest in the construction of stellarator equilibria. Beyond the result of D. Lortz, Z. Angew Math. Phys. 21, 196 (1970), few results are available. This work presents a c
Autor:
Harold Weitzner, Wrick Sengupta
Stellarators are generically small current and low plasma beta ($\beta= p/B^2\ll1$) devices. Often the construction of vacuum magnetic fields with good magnetic surfaces is the starting point for an equilibrium calculation. Although in cases with som
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3c49ad49b34f5397830cc95edad7824e
http://arxiv.org/abs/1809.09225
http://arxiv.org/abs/1809.09225
Autor:
Jean Paul Allain, Robert Granetz, Allen H. Boozer, N. A. Pablant, Jeremy Lore, Adil Hassam, J. H. Harris, S. C. Prager, Jeffrey P. Freidberg, Francesco Volpe, David F. Anderson, G. A. Wurden, Konstantin Likin, Matt Landreman, S. T. A. Kumar, Donald A. Spong, Harold Weitzner, Samuel Lazerson, Davide Curreli, Michael Zarnstorff, David Maurer, E.M. Edlund, Antoine J. Cerfon, George H. Neilson, Miklos Porkolab, Daniel Andruczyk, John Canik, R.J. Fonck, A. H. Reiman, Abhay K. Ram, Sherwood Anderson, Ilon Joseph, Oliver Schmitz, David Gates, James D. Hanson, J.L. Terry, C. Deng, A. H. Glasser, D. R. Demers, Chris Hegna, David N. Ruzic, S. F. Knowlton, Joseph Talmadge, Stuart R. Hudson, Carlos Paz-Soldan, Andrew Ware, David Ennis, H. Mynick, M. J. Pueschel
Publikováno v:
Springer US
This document is the product of a stellarator community workshop, organized by the National Stellarator Coordinating Committee and referred to as Stellcon, that was held in Cambridge, Massachusetts in February 2016, hosted by MIT. The workshop was wi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d43320c50c889dbdea6753e283cf4337
https://hdl.handle.net/1721.1/131899
https://hdl.handle.net/1721.1/131899
Autor:
Wrick Sengupta, Harold Weitzner
Quasisymmetry and omnigeneity of an equilibrium magnetic field are two distinct properties proposed to ensure radial localization of collisionless trapped particles in any stellarator. These constraints are incompletely explored, but have stringent r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c81d48c7e95ab22432f84e8114bcc6d2
http://arxiv.org/abs/1711.00059
http://arxiv.org/abs/1711.00059
Autor:
Harold Weitzner
Publikováno v:
Communications on Pure and Applied Mathematics. 65:975-991
Publikováno v:
Journal of Physics A: Mathematical and Theoretical. 40:2203-2218
A simple standard equation for the evolution of the electrons and electromagnetic fields in a gyrotron cavity is studied. A number of mathematical properties are shown: existence and uniqueness of solutions for a limited axial extent and existence an
Autor:
Daniel Winske, David Hammer, Michael E. Mauel, Donald B. Batchelor, Edward Thomas, Jeffrey P. Freidberg, Jeffrey A. Coderre, Harold Weitzner, Edward Ott, C. M. Greenfield, J. S. Sarff, Fred Driscoll, Francois Waelbroeck, G. Glendinning
Publikováno v:
Journal of Fusion Energy. 23:237-261
This report summarizes the findings and recommendations of the second Committee of Visitors (COV) whose charge was to review the manner in which the U. S. Department of Energy’s Office of Fusion Energy Science (OFES) manages certain programs under