Results 21 to 30 of about 3,492 (198)

Multi-Scale microscopy of Reactive sintered boride (RSB) neutron shielding materials

Nuclear Materials and Energy, 2022
Protecting superconducting magnets from neutron irradiation is critically important when demonstrating the utility of spherical tokamaks. Reactive Sintered Borides (RSBs) are promising radiation-dense materials and excellent attenuators of slow (
J.M. Marshall, F. Tang, Y. Han, P.A.J. Bagot, M.P. Moody   +4 more
doaj   +1 more source

Demonstration of transient CHI startup using a floating biased electrode configuration

Nuclear Fusion, 2023
Results from the successful solenoid-free plasma startup using the method of transient coaxial helicity injection (transient CHI) in the QUEST spherical tokamak (ST) are reported.
K. Kuroda, R. Raman, T. Onchi, M. Hasegawa, K. Hanada, M. Ono, B.A. Nelson, J. Rogers, R. Ikezoe, H. Idei, T. Ido, M. Nagata, O. Mitarai, N. Nishino, Y. Otsuka, Y. Zhang, K. Kono, S. Kawasaki, T. Nagata, A. Higashijima, S. Shimabukuro, I. Niiya, I. Sekiya, K. Nakamura, Y. Takase, A. Ejiri, S. Murakami   +26 more
doaj   +1 more source

Adhesive force distributions for tungsten dust deposited on bulk tungsten and beryllium-coated tungsten surfaces

Nuclear Materials and Energy, 2018
Comprehensive measurements of the adhesive force for tungsten dust adhered to tungsten surfaces have been performed with the electrostatic detachment method.
P. Tolias, G. Riva, M. De Angeli, S. Ratynskaia, G. Daminelli, C.P. Lungu, C. Porosnicu   +6 more
doaj   +1 more source

SOLPS-ITER analysis of a proposed STEP double null geometry: impact of the degree of disconnection on power-sharing

Nuclear Fusion, 2023
To mitigate the issue of plasma exhaust in reactor scale tight aspect ratio tokamaks such as Spherical Tokamak for Energy Production (STEP), a double-null (DN) configuration is thought to be advantageous over a single-null (SN) configuration.
R.T. Osawa, D. Moulton, S.L. Newton, S.S. Henderson, B. Lipschultz, A. Hudoba   +5 more
doaj   +1 more source

Methodology of Plasma Shape Reachability Area Estimation in D-Shaped Tokamaks

Mathematics, 2022
This paper suggests and develops a new methodology of estimation for a multivariable reachability region of a plasma separatrix shape on the divertor phase of a plasma discharge in D-shaped tokamaks.
Yuri V. Mitrishkin, Valerii I. Kruzhkov, Pavel S. Korenev   +2 more
doaj   +1 more source

Energetic particle-driven compressional Alfvén eigenmodes and prospects for ion cyclotron emission studies in fusion plasmas

New Journal of Physics, 2016
As a fundamental plasma oscillation the compressional Alfvén waves (CAWs) are interesting for plasma scientists both academically and in applications for fusion plasmas. They are believed to be responsible for the ion cyclotron emission (ICE) observed in
N N Gorelenkov
doaj   +1 more source

Neutral Beam Coupling with Plasma in a Compact Fusion Neutron Source

Applied Sciences, 2022
FNS-ST is a fusion neutron source project based on a spherical tokamak (R/a = 0.5 m/0.3 m) with a steady-state neutron generation of ~1018 n/s. Neutral beam injection (NBI) is supposed to maintain steady-state operation, non-inductive current drive and ...
Eugenia Dlougach, Alexander Panasenkov, Boris Kuteev, Arkady Serikov   +3 more
doaj   +1 more source

New Identification Approach and Methods for Plasma Equilibrium Reconstruction in D-Shaped Tokamaks

Mathematics, 2021
The paper deals with the identification of plasma equilibrium reconstruction in D-shaped tokamaks on the base of plasma external magnetic measurements.
Yuri V. Mitrishkin, Pavel S. Korenev, Artem E. Konkov, Valerii I. Kruzhkov, Nicolai E. Ovsiannikov   +4 more
doaj   +1 more source

Two-fluid and magnetohydrodynamic modelling of magnetic reconnection in the MAST spherical tokamak and the solar corona

, 2015
Twisted magnetic flux ropes are ubiquitous in space and laboratory plasmas, and the merging of such flux ropes through magnetic reconnection is an important mechanism for restructuring magnetic fields and releasing free magnetic energy.
Browning, P. K., Cardnell, S., Evans, M., Lucini, F. Arese, Lukin, V. S., McClements, K. G., Stanier, A.   +6 more
core   +1 more source

Short-scale turbulent fluctuations driven by the electron-temperature gradient in the national spherical torus experiment [PDF]

, 2019
Measurements with coherent scattering of electromagnetic waves in plasmas of the National Spherical Torus Experiment indicate the existence of turbulent fluctuations in the range of wave numbers k(perpendicular to)rho(e)=0.1-0.4, corresponding to a ...
Bell, RE, Domier, CW, Hosea, JC, Kaye, SM, LeBlanc, BP, Lee, W, Luhmann, NC, Mazzucato, E, Park, H, Ryan, PM, Smith, DR, Wilson, JR, Yuh, H   +12 more
core   +1 more source