Results 71 to 80 of about 18,475 (245)

On neoclassical impurity transport in stellarator geometry

, 2013
The impurity dynamics in stellarators has become an issue of moderate concern due to the inherent tendency of the impurities to accumulate in the core when the neoclassical ambipolar radial electric field points radially inwards (ion root regime).
Beidler C D, Beidler C D Maaßberg H, C D Beidler, Dobrott D R, H Maaßberg, Helander P, Hirsch M, J M García-Regaña, Kauffmann K, Kornilov V, Maaßberg H, Nakamura Y, P Helander, R Kleiber, Y Turkin   +14 more
core   +1 more source

The importance of the classical channel in the impurity transport of optimized stellarators [PDF]

, 2019
In toroidal magnetic confinement devices, such as tokamaks and stellarators, neoclassical transport is usually an order of magnitude larger than its classical counterpart.
Buller, S., Mollén, A., Newton, S. L., Pusztai, I., Smith, H. M.   +4 more
core   +2 more sources

Simulating fusion alpha heating in a stellarator reactor

Plasma Physics and Controlled Fusion, 2021
Gyrocenter following simulations of fusion born alpha particles in a stellarator reactor are preformed using the BEAMS3D code. The Wendelstein 7-X high mirror configuration is scaled in geometry and magnetic field to reactor relevant parameters. A 2×1020
S. Lazerson, A. LeViness, J. Lion
semanticscholar   +1 more source

Fast and Invertible Simplicial Approximation of Magnetic‐Following Interpolation for Visualizing Fusion Plasma Simulation Data

Computer Graphics Forum, Volume 44, Issue 3, June 2025.
Abstract We introduce a fast and invertible approximation for fusion plasma simulation data represented as 2D planar meshes with connectivities approximating magnetic field lines along the toroidal dimension in deformed 3D toroidal spaces. Scientific variables (e.g., density and temperature) in these fusion data are interpolated following a complex ...
Congrong Ren, Robert Hager, Randy Michael Churchill, Albert Mollén, Seung‐Hoe Ku, Choong‐Seock Chang, Hanqi Guo   +6 more
wiley   +1 more source

Design of transverse magnetic field sweeping solenoids for 140 GHz mega‐watt gyrotrons

The Journal of Engineering, Volume 2018, Issue 14, Page 682-685, 2018., 2018
As the overlarge power density at the collector of mega‐watt (MW) gyrotrons limits the increase in their average output power and pulse width, transverse magnetic field sweeping solenoids (TMFSS) with periodical changing magnetic field have been designed for a 140 GHz MW gyrotron developed and tested at Beijing Vacuum Electronics Research Institute ...
Xu Zeng, Bentian Liu, Jinjun Feng
wiley   +1 more source

Numerical studies on electron cyclotron resonance heating and optimization in the CN-H1 stellarator

Nuclear Engineering and Technology
The H1-NF stellarator in the Australian National University has been transported to University of South China and is currently being restored and reconstructed to the CN-H1 stellarator.
Chun Yan Li, Ping Wei Zheng, Xue Yu Gong, Zheng Kun Gao, Xin Chen Jiang   +4 more
doaj   +1 more source

TBM/MTM for HTS-FNSF: An Innovative Testing Strategy to Qualify/Validate Fusion Technologies for U.S. DEMO

Energies, 2016
The qualification and validation of nuclear technologies are daunting tasks for fusion demonstration (DEMO) and power plants. This is particularly true for advanced designs that involve harsh radiation environment with 14 MeV neutrons and high ...
Laila El-Guebaly, Arthur Rowcliffe, Jonathan Menard, Thomas Brown   +3 more
doaj   +1 more source

Study of Alfvén eigenmode stability in Quasi-Poloidal Stellarator (QPS) plasma using a Landau closure model

Nuclear Fusion, 2023
The aim of this study is to analyze the linear stability of Alfvén eigenmodes (AE) in the QPS device heated by a tangential neutral beam injector (NBI). The analysis is performed using the gyro-fluid code FAR3d, that solves the reduced MHD equations for ...
J. Ortiz, J. Varela, D.A. Spong, L. Garcia, Y. Ghai   +4 more
doaj   +1 more source

Formation of a Boron‐Oxide Termination for the (100) Diamond Surface

Advanced Materials Interfaces, Volume 11, Issue 33, November 25, 2024.
A boron‐oxide termination for (100) diamond is formed under ultrahigh vacuum conditions. This is the first demonstration of a new method of introducing a boron‐based species to the diamond lattice. This result has potential for enabling new surface‐based pathways to the fabrication of high quality boron‐doped delta layers and boron‐based material ...
Alex K. Schenk, Rebecca Griffin, Anton Tadich, Daniel Roberts, Alastair Stacey   +4 more
wiley   +1 more source

Thermal‐Hydraulic Assessment of W7‐X Plasma Vessel Venting System in Case of 40 mm In‐Vessel LOCA

Science and Technology of Nuclear Installations, Volume 2015, Issue 1, 2015., 2015
This paper presents assessment of the capacity of W7‐X venting system in response to in‐vessel LOCA, rupture of 40 mm diameter pipe during operation mode “baking.” The integral analysis of the coolant release from the cooling system, pressurisation of PV, and response of the venting system is performed using RELAP5 code.
E. Urbonavičius, T. Kaliatka, Massimo Zucchetti   +2 more
wiley   +1 more source