Results 61 to 70 of about 1,047,530 (303)
Generic structure of externally driven tearing modes instabilities
, 2002 A major limit to steady state and advanced high $\beta_{\rm p}$ operation of tokamaks of reactor class is due to the onset of tearing modes that develop magnetic and may cause loss of energy confinement or a major disruption.
R. Coelho, E. Lazzaro
core +1 more source
The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation
FEBS Letters, EarlyView.Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge +6 more
wiley +1 more source
Feedback control of tearing modes via modulated neutral beams
, 1997 Tearing modes are suspected to be a principal cause of both minor and major disruptions in a tokamak. Suppression of these modes via a neutral beam which supplies momentum, energy and particles of appropriate phase and amplitude is considered.
Sen, A. K. +7 more
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Magnetic Island Structures Associated with Kinetic Alfvén Solitary Wave in Two-fluid Plasma
The Astrophysical JournalWe investigate the formation of magnetic islands and the onset of tearing instability within kinetic Alfvén solitary waves in a two-fluid space plasma. These localized structures, featuring internal magnetic shear, naturally support magnetic reconnection
Cheong R. Choi +6 more
doaj +1 more source
Nuclear Fusion, 2023 Recent observations of the successive formations of the $4/1,3/1$ , and $2/1$ magnetic islands as well as the subsequent braking of the $2/1$ mode during a low- Z impurity penetration process in EAST experiments are well reproduced in our 3 D resistive ...
Shiyong Zeng +3 more
doaj +1 more source
FEBS Letters, EarlyView.Synechocystis strains deficient in succinate dehydrogenase (SDH) secrete more succinate than the WT under dark anaerobic conditions, supporting that SDH then primarily acts as SDH, not as a fumarate reductase. L‐aspartate oxidase (Laspo) from Synechocystis is functional under anaerobic conditions, reducing fumarate to succinate.
Kateryna Kukil +3 more
wiley +1 more source
Artificial molecular machines and motors—Design and control of nanoscale motion
FEBS Letters, EarlyView.Molecules are constantly moving because of thermal fluctuations, but random motion alone cannot be exploited to perform directional tasks. Artificial molecular machines use chemical, electrical, or light energy to bias this motion. Molecular shuttles, rotary motors, and supramolecular pumps illustrate how nanoscale movement can be controlled and ...
Leonardo Andreoni, Alberto Credi
wiley +1 more source
ECH and ECCD effects on NTMs stabilization by ECRF in JT-60SA tokamak
EPJ Web of Conferences, 2012 The current drive efficiency of the dual frequency (110 GHz and 138 GHz) ECRF system of JT-60SA is studied. The requirements for neoclassical tearing modes (NTMs) instabilities control by ECRF during the initial research phase when only part of the full ...
Ide S. +10 more
doaj +1 more source
THE RESTRAINT OF THE TEARING MODES IN TOKAMAK
Acta Physica Sinica, 1984 In this article, the restraint of the spontanueous tearing modes caused by RHF is analyzed and calculated by solving the resistive MHD equations. We prove that the growth rate of the tearing modes of m=2 can be reduced about two times by the helical fields.
null WANG MAO-QUAN, null ZHAO QIN-ZHU
openaire +1 more source
Interaction of Tearing Modes with Passive Structures in a Tokamak
, 2020 In this work a surface current plasma model is coupled to a Volume Integral Formulation for studying the interaction between tokamak tearing modes and the machine metallic structures surrounding the plasma.
Bettini Paolo +5 more
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