Zobrazeno 1 - 9
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pro vyhledávání: '"Alexander S. Glasser"'
Autor:
Alexander S. Glasser, Hong Qin
Publikováno v:
Journal of Plasma Physics. 88
A particle-in-cell algorithm is derived with a canonical Poisson structure in the formalism of finite element exterior calculus. The resulting method belongs to the class of gauge-compatible splitting algorithms, which exactly preserve gauge symmetri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::655292c27bf90bce243fe464c60ba734
https://doi.org/10.1017/s0022377822000290
https://doi.org/10.1017/s0022377822000290
Autor:
Alexander S. Glasser, Eugene Kur
A novel structure-preserving algorithm for general relativity in vacuum is derived from a lattice gauge theoretic discretization of the tetradic Palatini action. The resulting model of discrete gravity is demonstrated to preserve local Lorentz invari
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f8c337c2afbc9ae7e1da270c8e4e10a5
http://arxiv.org/abs/2202.02486
http://arxiv.org/abs/2202.02486
A method of Parity-Time (PT)-symmetry analysis is introduced to study the high dimensional, complicated parameter space of drift wave instabilities. We show that spontaneous PT-symmetry breaking leads to the Ion Temperature Gradient (ITG) instability
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5573bc374f8219a507a665172e7b6f9c
http://arxiv.org/abs/2010.09620
http://arxiv.org/abs/2010.09620
Autor:
Hong Qin, Alexander S. Glasser
Publikováno v:
Journal of Plasma Physics. 86
In recent years, several gauge-symmetric particle-in-cell (PIC) methods have been developed whose simulations of particles and electromagnetic fields exactly conserve charge. While it is rightly observed that these methods’ gauge symmetry gives ris
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f5ba282e52fd81c00f44d0e1865ef51e
https://doi.org/10.1017/s0022377820000434
https://doi.org/10.1017/s0022377820000434
Autor:
Egemen Kolemen, Z.A. Xing, David Eldon, M. A. Roelofs, W.J. Eggert, Raffi Nazikian, N.C. Logan, Olivier Izacard, Alexander S. Glasser, Andrew Nelson, Sterling Smith, Orso Meneghini
Publikováno v:
Fusion Engineering and Design. 163:112163
Magnetohydrodynamic equilibrium reconstructions with kinetic constraints are an essential input of many tokamak stability and transport analysis workflows. The reconstructions themselves also contain useful information about pressure and current dens
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4145bb0f0c8975bd9df9f94fbdc2ec70
https://doi.org/10.1016/j.fusengdes.2020.112163
https://doi.org/10.1016/j.fusengdes.2020.112163
Publikováno v:
Physics of Plasmas. 27:022114
In the following work, we demonstrate the efficacy of a Riccati δW ideal MHD stability analysis that bypasses the numerically intractable integration of the Newcomb equation. By transforming the linear Newcomb equation into a quadratic Riccati equat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e6b9f668ee212123a2e6af6d8f5a94ce
https://doi.org/10.1063/1.5109160
https://doi.org/10.1063/1.5109160
Parity-Time (PT)-symmetry is being actively investigated as a fundamental property of observables in quantum physics. We show that the governing equations of the classical two-fluid interaction and the incompressible fluid system are PT-symmetric, an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4daf0e984f26ca1394a09914fc6980f7
Autor:
Egemen Kolemen, Alexander S. Glasser
Publikováno v:
Physics of Plasmas. 25:082502
We introduce a new near real-time solution for the tokamak resistive MHD Δ′ matrix. By extending state transition matrix methods introduced in [Glasser et al., Phys. Plasmas 25(3), 032507 (2017)] and leveraging the asymptotic methods of [A. H. Gla
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::babb47b85d0258f5d3beba630fc077b8
https://doi.org/10.1063/1.5029477
https://doi.org/10.1063/1.5029477
Publikováno v:
Physics of Plasmas. 25:032507
Active feedback control of ideal MHD stability in a tokamak requires rapid plasma stability analysis. Toward this end, we reformulate the δW stability method with a Hamilton-Jacobi theory, elucidating analytical and numerical features of the generic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e6fdc75feaaf3555f16c3acddfbfc83e
https://doi.org/10.1063/1.5007042
https://doi.org/10.1063/1.5007042