Results 61 to 70 of about 10,346 (211)

Impact of multifold magnetic structure on spectroscopy analysis in Heliotron J based on EMC3‐EIRENE simulation

Contributions to Plasma Physics, Volume 64, Issue 7-8, August-September 2024.
Abstract The distribution pattern of the connection length in the divertor region of Heliotron J was calculated by the field line tracing method. A multifold layer structure, characterized by the range of connection length, was revealed to interpret the response of the transport of the lower‐charged impurity ions to the divertor structure.
F. Cai, S. Kado, G. Kawamura, C. Feng, R. Matoike, A. Miyashita, S. Ohshima, T. Minami, S. Inagaki, F. Kin, S. Kobayashi, A. Ishizawa, Y. Nakamura, H. Okada, S. Konoshima, T. Mizuuchi, Y. Feng, H. Frerichs, K. Nagasaki   +18 more
wiley   +1 more source

Near-surface expansion of vacuum stellarator configurations

Nuclear Fusion
Stellarators are inherently steady-state and disruption-free. However, three-dimensional geometry significantly increases the complexity of both equilibrium calculation and configuration optimization.
Ke Liu, Zhexuan Zheng, Caoxiang Zhu
doaj   +1 more source

Toward plasma drifts in EMC3: Implementation of gradient, divergence, and particle tracing schemes

Contributions to Plasma Physics, Volume 64, Issue 7-8, August-September 2024.
Abstract This paper presents a first implementation of gradient, divergence, and particle tracing schemes for the EMC3 code, a stochastic 3D plasma fluid code widely employed for edge plasma and impurity transport modeling in tokamaks and stellarators.
Ruben De Wolf, Felix Reimold, Yuhe Feng, Matthieu Jacobs, Wouter Dekeyser, Giovanni Samaey, Martine Baelmans   +6 more
wiley   +1 more source

MHD Convection with Joule Heating and Internal Heat Generation in a Two‐Layer Discretely Heated Chamber Partly Filled with Porous Medium

International Journal of Energy Research, Volume 2024, Issue 1, 2024.
The present research presents an innovative approach by integrating magnetohydrodynamic (MHD) flow with resistive heating, integrating a partly permeable layer and interior heat production to scrutinize natural convective flow within a square domain. It also examines both straight and wavy interfaces between the porous and fluid domains.
Nahid Hasan, Niloy Deb, Sumon Saha, Mohamed Zbair   +3 more
wiley   +1 more source

Sensitivity of magnetic islands in permanent magnet stellarators using the gradient and Hessian methods

Nuclear Fusion
Stellarator plasmas are known to be very sensitive to perturbations in the magnetic field. The permanent magnet stellarator was in part developed as a solution to high machining tolerances placed on the shape properties of electromagnetic coils in ...
A. Chambliss, C. Zhu, D. Gates, M. Zarnstorff, T. Qian   +4 more
doaj   +1 more source

Gyrokinetic prediction of core tungsten peaking in a WEST plasma with nitrogen impurities

Nuclear Fusion
Tungsten peaking is predicted in the core of a WEST plasma with total-f gyrokinetic simulations, including both collisional and turbulent transport. This prediction is validated with a synthetic diagnostic of the bolometry.
J. Dominski, P. Maget, P. Manas, J. Morales, S. Ku, A. Scheinberg, C.S. Chang, R. Hager, M. O’Mullane, the WEST team   +9 more
doaj   +1 more source

Enhancing stellarator accessibility through port size optimization

Nuclear Fusion
Access to the plasma chamber in a stellarator reactor is essential for maintenance and diagnostics. However, the complex geometry of stellarator coils, often characterized by their strong twisting, can severely limit the space available for access ports.
A. Baillod, E.J. Paul, T. Elder, J.M. Halpern   +3 more
doaj   +1 more source

Converting energy from fusion into useful forms

, 2013
If fusion power reactors are to be feasible, it will still be necessary to convert the energy of the nuclear reaction into usable form. The heat produced will be removed from the reactor core by a primary coolant, which might be water, helium, molten ...
Harrington, C., Jenkins, I., Kiely, C., Kovari, M.   +3 more
core   +1 more source

Neutronics analysis of spin-polarized fuel in spherical tokamaks

Nuclear Fusion
The effect of spin-polarized deuterium–tritium fuel on the blanket, magnets, and surrounding structures is analyzed for a spherical tokamak fusion power plant.
Jin Whan Bae, Katarzyna Borowiec, Vittorio Badalassi, Jason Parisi, Ahmed Diallo, Jon Menard, Andrei Khodak, Thomas Brown   +7 more
doaj   +1 more source

A framework for discrete optimization of stellarator coils

Nuclear Fusion
Designing magnets for three-dimensional plasma confinement is a key task for advancing the stellarator as a fusion reactor concept. Stellarator magnets must produce an accurate field while leaving adequate room for other components and being reasonably ...
K.C. Hammond
doaj   +1 more source