Zobrazeno 1 - 10
of 40
pro vyhledávání: '"G O Ludwig"'
Autor:
G. O. Ludwig
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 3, Pp 1-29 (2024)
Abstract This paper analyzes, within the extended gravitoelectromagnetic (GEM) formulation, the equilibrium of a large scale gravitational system formed by rotating dust. The force balance equation gives the rotation velocity in terms of the GEM fiel
Externí odkaz:
https://doaj.org/article/468fee81909d46af829621ebd26cefb5
Autor:
G. O. Ludwig
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 4, Pp 1-9 (2022)
Abstract The role of the gravitomagnetic field in the rotation of galaxies is clarified. Larmor’s theorem simplifies the analysis of different galactic equilibrium solutions. In particular, the self-consistent solution, which takes into account bot
Externí odkaz:
https://doaj.org/article/1e147249ae1241bf908e8a3b27245544
Autor:
G. O. Ludwig
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 2, Pp 1-25 (2021)
Abstract Historically, the existence of dark matter has been postulated to resolve discrepancies between astrophysical observations and accepted theories of gravity. In particular, the measured rotation curve of galaxies provided much experimental su
Externí odkaz:
https://doaj.org/article/73885ea9963b400bb02c9df277752902
Autor:
G. O. Ludwig
Publikováno v:
The European Physical Journal Plus. 136
This work presents a novel approach to well established concepts of gravity, formulating a new and consistent gravitoelectromagnetic theory. The long standing gravitoelectromagnetic field theory is considered in the framework of Hamilton’s principl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cdae70db14e8d41b001dbea35767ef4c
https://doi.org/10.1140/epjp/s13360-021-01367-2
https://doi.org/10.1140/epjp/s13360-021-01367-2
Autor:
G. O. Ludwig
Publikováno v:
The European Physical Journal Plus. 136
This article makes the connection between the new gravitoelectromagnetic theory presented in the part I paper and general gravity in its weak formulation. The perturbation in the metric tensor is obtained in terms of the flat-space total energy–mom
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ad7059ddec6701b995a5d898fd9b0f01
https://doi.org/10.1140/epjp/s13360-021-01452-6
https://doi.org/10.1140/epjp/s13360-021-01452-6
Autor:
G. O. Ludwig
Publikováno v:
Physics of Plasmas. 27:022110
Hamilton's principle is applied to obtain the equations of motion for fully relativistic collision-free plasma. The variational treatment is presented in both the Eulerian and Lagrangian frameworks. A Clebsch representation of the plasma fluid equati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d5e8c25585e28da21b2401ed415d0df3
https://doi.org/10.1063/1.5139315
https://doi.org/10.1063/1.5139315
Publikováno v:
Nuclear Fusion. 46:S629-S644
The simulation of eddy currents induced in the vacuum vessel and central column of spherical tokamaks is discussed, improving upon previously published methods. The present model allows us to describe the vacuum vessel either as a thin shell or as a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2441b07fdd143c9eb3708a10b51e80db
https://doi.org/10.1088/0029-5515/46/8/s09
https://doi.org/10.1088/0029-5515/46/8/s09
Autor:
G. Van Oost, Martin Hron, G.M. Vorobyev, Akira Hirose, Mikhail Gryaznevich, B.V. Kuteev, A. Malaquias, G. O. Ludwig, E. Del Bosco, G. Mank, H. Hegazy, Ivan Cunha Nascimento, Yexi He, Carlos A. Silva
Publikováno v:
Nuclear Fusion. 45:S245-S254
Small tokamaks have an important role in fusion research. More than 40 small tokamaks are operational. Research on small tokamaks has created a scientific basis for the scaling-up to larger tokamaks. Well-known scientific and engineering schools, whi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dde536e05e1d05e0f28a5826114b66ea
https://doi.org/10.1088/0029-5515/45/10/s20
https://doi.org/10.1088/0029-5515/45/10/s20
Publikováno v:
Fusion Engineering and Design. 73:343-356
This paper describes an analytical model of the eddy currents that circulate in the central column of the spherical tokamak ETE (Experimento Tokamak Esferico). The varying magnetic flux that forms and maintains the plasma current also induces current
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::280c7d5f702bd38851f7735d63a2e979
https://doi.org/10.1016/j.fusengdes.2005.08.027
https://doi.org/10.1016/j.fusengdes.2005.08.027
Publikováno v:
Nuclear Fusion. 45:675-684
A Green's function method is developed to evaluate the currents induced during startup in the vacuum vessel of ETE (Experimento Tokamak Esferico). The non-homogeneous integral equation for the axisymmetric eddy currents distribution is determined usi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::84f759676c28bc474bb038616c5683bf
https://doi.org/10.1088/0029-5515/45/7/017
https://doi.org/10.1088/0029-5515/45/7/017