Results 101 to 110 of about 4,889,124 (198)

Experimental characterization of plasma start-up using ECRH in preparation of W7-X operation

EPJ Web of Conferences, 2015
The upcoming operation of Wendelstein 7-X (W7-X) will be supported by an Electron Cyclotron Resonance Heating (ECRH) system working at 140 GHz in second harmonic at the nominal magnetic field of 2.5T.
Preynas M., Aßmus D., Igami H., Kado S., Kobayashi S., Kubo S., Laqua H.P., Mutoh T., Nagasaki K., Otte M., Shimozuma T., Stange T., Yoshimura Y.   +12 more
doaj   +1 more source

Existence of weakly quasisymmetric magnetic fields without rotational transform in asymmetric toroidal domains. [PDF]

Sci Rep, 2022
Sato N.
europepmc   +1 more source

Optimization of M=2 stellarator

, 1996
"Quasi-axisyrnmetric stellarator (QAS) configurations are considered for improvement of high energy reflected particle confinement. A reference QAS configuration with the field period of M = 2 has been obtained by the optimization of the shape of the ...
Nuhrenberg, J., Okamoto, M., Yokoyama, M., Nuhrenberg, J.", "Nakajima, N., Yokoyama, M., Okamoto, M., Nakajima, N.   +7 more
core  

Suppressing trapped-electron-mode-driven turbulence via optimization of three-dimensional shaping

Nuclear Fusion
Turbulent transport driven by trapped electron modes (TEMs) is believed to drive significant heat and particle transport in quasihelically symmetric stellarators.
J.M. Duff, B.J. Faber, C.C. Hegna, M.J. Pueschel, P.W. Terry   +4 more
doaj   +1 more source

Optimizing stellarators with hidden symmetry

Stellarators confine fusion plasmas using three-dimensional magnetic fields composed of nested toroidal magnetic surfaces. In generic stellarators, trapped particles can drift across these surfaces and degrade plasma confinement. Certain topological properties of the magnetic field strength can suppress these drifts.
Liu, Hengqian, Yu, Guodong, Zhu, Caoxiang, Velasco, José Luis, Gaur, Rahul, Panici, Dario, Kolemen, Egemen, Yu, Mingyang, Ding, Weixing, Wang, Shaojie, Zhuang, Ge   +10 more
openaire   +2 more sources

Forced flow cryogenic cooling in fusion devices: A review. [PDF]

Heliyon, 2021
Vaghela H, Lakhera VJ, Sarkar B.
europepmc   +1 more source

Reactor-scale stellarators with force and torque minimized dipole coils

Nuclear Fusion
In this work, we utilize new coil objectives for stellarator optimization with autodifferentiation, including pointwise and net coil–coil forces and torques. We use these methods to perform the first large-scale optimization of planar dipole coil arrays,
Alan A. Kaptanoglu, Alexander Wiedman, Jacob Halpern, Siena Hurwitz, Elizabeth J. Paul, Matt Landreman   +5 more
doaj   +1 more source

Numerical Methods for Stellarator Equilibrium and Optimization: Continuation Methods, Free Boundary Equilibrium, and Constrained Optimization

The stellarator is a promising concept for a future nuclear fusion power plant, but hasgotten relatively little attention compared to the tokamak concept.
Conlin, William
core  

Some results of stellarator optimization

, 2002
The collisionless confinement of all reflected particles with orbits that star within the inner half of the plasma of a stellarator with the poloidal direction of the contours of the magnetic field strenght B is shown computationally to be possible.
Kasilov, S.V., Skovoroda, A.A., Mikhailov, M.I., Kalyuzhnyj, V.N., Ivanov, A.A., Subbotin, A.A., Nemov, V.V., Martynov, A.A., Heyn, M.F., Medvedev, S.Yu., Nührenberg, J., Isaev, M.Yu., Poshekhonov, Yu.Yu., Kerbichler, W., Samitov, M.A., Zille, R., Shafranov, V.D., Cooper, W.A.   +17 more
core  

How does the magnetic gradient scale length influence complexity of filamentary coils in stellarators?

Nuclear Fusion
The distance between the last closed flux surface (LCFS) and the nearest electromagnetic coils is a dominating factor in the cost, size, and engineering difficulty of stellarators.
John Kappel, Matt Landreman, Philipp Jurašić, Sophia A. Henneberg   +3 more
doaj   +1 more source