Results 31 to 40 of about 1,947,311 (293)

A new approach to the treatment of Separatrix Chaos and its applications [PDF]

, 2010
We consider time-periodically perturbed 1D Hamiltonian systems possessing one or more separatrices. If the perturbation is weak, then the separatrix chaos is most developed when the perturbation frequency lies in the logarithmically small or moderate ...
P. V. E. McClintock, Khovanov, I. A., S. M. Soskin, I. A. Khovanov, Soskin, Stanislav M., McClintock, P. V. E., Mannella, R., Yevtushenko, O. M., O. M. Yevtushenko, Soskin, S. M., R. Mannella   +10 more
core   +1 more source

Edge turbulence transport during ELM suppression with n = 4 resonant magnetic perturbation on EAST

Nuclear Fusion, 2023
The edge turbulence characteristics and the induced radial transport have been investigated in edge localized mode (ELM) suppression by using the $n = $ 4 resonant magnetic perturbation coils on EAST, with ${q_{95}} = $ 3.6 and the electron ...
S.C. Liu, Y. Liang, L.T. Li, T.F. Tang, X.H. Wu, N. Yan, T.H. Shi, G.S. Li, K.X. Ye, L.Y. Meng, R. Ding, Y. Sun, M. Jia, Q. Ma, Q. Zang, X. Li, S.X. Wang, M.R. Wang, H.L. Zhao, J.L. Wei, T. Zhang, Y.F. Jin, L. Liao, W.Y. Wei, Y. Li, R. Chen, G.H. Hu, N. Zhao, X.J. Liu, T.F. Ming, X. Han, W.B. Zhang, L. Wang, J.P. Qian, L. Zeng, G.Q. Li, G.S. Xu, X.Z. Gong, X. Gao, the EAST Team   +39 more
doaj   +1 more source

Pressure-driven amplification and penetration of resonant magnetic perturbations [PDF]

Physics of Plasmas, 2016
We show that a resonant magnetic perturbation applied to the boundary of an ideal plasma screw-pinch equilibrium with nested surfaces can penetrate inside the resonant surface and into the core. The response is significantly amplified with increasing plasma pressure.
J. Loizu, S. R. Hudson, P. Helander, S. A. Lazerson, A. Bhattacharjee   +4 more
openaire   +3 more sources

Structural and biochemical analysis of a B12 superbinder

FEBS Letters, EarlyView.
BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices, Jacob J. Whittaker, Dirk J. Slotboom, Albert Guskov   +3 more
wiley   +1 more source

Neutrons to probe nanoscale magnetism in perpendicular magnetic recording media [PDF]

, 2012
Magnetic recording media refers to the disc shaped thin film magnetic medium present inside the hard disk drive of a computer. Magnetic recording is an important function of the hard disk drive by which information such as text, pictures, audio and ...
Venkataramana, Vikash
core   +2 more sources

Observation of enhanced pedestal turbulence during ELM mitigation with resonant magnetic perturbation on EAST

AIP Advances, 2021
Edge localized mode (ELM) mitigation accompanied by density pump-out has been achieved during the application of resonant magnetic perturbation (RMP) with a toroidal mode number of n = 4 on EAST recently. The mean ELM frequency increases by a factor of 2.
Fubin Zhong, Tao Zhang, Yumin Wang, Fei Wen, Jia Huang, Mingfu Wu, Gongshun Li, Yukai Liu, Kangning Geng, Haoming Xiang, Kaixuan Ye, Zhen Zhou, Xiang Han, Lingyi Meng, Liang Wang, Youwen Sun, Xiang Gao   +16 more
doaj   +1 more source

Understanding the effect resonant magnetic perturbations have on ELMs [PDF]

Plasma Physics and Controlled Fusion, 2013
All current estimations of the energy released by type I ELMs indicate that, in order to ensure an adequate lifetime of the divertor targets on ITER, a mechanism is required to decrease the amount of energy released by an ELM, or to eliminate ELMs altogether.
Kirk, A, Chapman, I T, Evans, T E, Ham, C, Harrison, J R, Huijsmans, G, Liang, Y, Liu, Y Q, Loarte, A, Suttrop, W, Thornton, A J   +10 more
openaire   +2 more sources

Smaller is better: nanobodies meet NMR

FEBS Letters, EarlyView.
Nanobodies are single‐domain antigen‐binding fragments derived from camelid heavy chain antibodies. Their small size, high stability, and exceptional specificity make nanobodies uniquely useful probes for NMR studies of protein dynamics, transient conformational states, and protein–protein interactions.
Oleg Y. Dmitriev
wiley   +1 more source

Suppression of sawtooth oscillations by m/n = 2/2 resonant magnetic perturbation

Nuclear Fusion
Significant extension of sawtooth control toward higher electron density ( n _e ) and edge safety factor ( q _a ) ranges has been achieved by m / n = 2/2 resonant magnetic perturbation (RMP), which is ∼8 times stronger than the previous RMP generated by ...
Jianchao Li, Yu Zhang, Xiaoqing Zhang, Nengchao Wang, Yangbo Li, Zhengkang Ren, Chuanxu Zhao, Zhipeng Chen, Zhoujun Yang, Song Zhou, Wei Yan, Donghui Xia, Yonghua Ding, Chen Zhongyong, the J-TEXT Team   +14 more
doaj   +1 more source

Isochronous island bifurcations driven by resonant magnetic perturbations in tokamaks

Physical Review E
Recent evidences show that heteroclinic bifurcations in magnetic islands may be caused by the amplitude variation of resonant magnetic perturbations in tokamaks. To investigate the onset of these bifurcations, we consider a large aspect ratio tokamak with an ergodic limiter composed of two pairs of rings that create external primary perturbations with ...
Leal, B. B., Caldas, I. L., de Sousa, M. C., Viana, R. L., Ozorio de Almeida, A. M.   +4 more
openaire   +3 more sources