Results 11 to 20 of about 1,947,311 (293)

Accuracy of microwave cavity perturbation measurements. [PDF]

, 2001
Techniques based on the perturbation of cavity resonators are commonly used to measure the permittivity and permeability of samples of dielectric and ferrite materials at microwave frequencies.
Carter, Richard G.
core   +4 more sources

Applications of cosmological perturbation theory [PDF]

, 2011
PhDCosmological perturbation theory is crucial for our understanding of the universe. The linear theory has been well understood for some time, however developing and applying the theory beyond linear order is currently at the forefront of research in
Christopherson, Adam J.
core   +4 more sources

Observation of hysteretic magnetic island response to Resonant Magnetic Perturbation in LHD [PDF]

Observation of hysteretic magnetic island response to Resonant Magnetic Perturbation in LHD
The hysteretic magnetic island response to an externally applied resonant magnetic perturbation (RMP) field is observed in the LHD. Thresholds of the amplitude of the RMP for the growth/healing transition of the magnetic island differ. In the case that the RMP is ramped up, that field is initially shielded and the magnetic island is healed. After that,
YOSHINUMA, Mikiro, YAMADA, Ichihiro, LHD, Experiment Group, TAKEMURA, Yuuki, SAKAKIBARA, Satoru, WATANABE, Kiyomasa, FURUKAWA, Masaru, NISHIMURA, Seiya, IDA, Katsumi, NARUSHIMA, Yoshiro, OHDACHI, Satoshi, TAKEMURA, Yuki, SUZUKI, Yasuhiro   +12 more
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Plasma response to externally applied resonant magnetic perturbations [PDF]

Nuclear Fusion, 2011
Based on recent finding that applied resonant magnetic perturbation (RMP) can either increase or decrease the local electron density gradient around the resonant surface (Yu and Günter 2009 Nucl. Fusion 49 062001), the plasma response to the RMP of a single helicity is studied numerically by further taking into account the ...
Yu, Q., Günter, S.
openaire   +4 more sources

Toroidal modeling of 3D perturbations generated by current filaments in scrape-off layer in tokamak with biased divertor targets

Nuclear Fusion, 2022
The divertor biasing technique offers a promising alternative to control the edge localized mode (ELM) as well as the divertor heat load in tokamaks, as compared to the resonant magnetic perturbation (RMP) generated by magnetic coils.
G.Z. Hao, G.Q. Dong, B.T. Cui, Y.Q. Liu, Y.H. Xu, T.F. Sun, X.Q. Ji, S. Wang, Y.F. Zhao, J.Q. Xu, X. Bai, N. Zhang, C.Y. Li, L. Wang, H.D. He, J.M. Gao, Yi Liu, W.L. Zhong, M. Xu, X.R. Duan   +19 more
doaj   +1 more source

Suppression of Runaway Electrons by Resonant Magnetic Perturbations in TEXTOR Disruptions [PDF]

Physical Review Letters, 2008
The generation of runaway electrons in the international fusion experiment ITER disruptions can lead to severe damage at plasma facing components. Massive gas injection might inhibit the generation process, but the amount of gas needed can affect, e.g., vacuum systems.
Lehnen, M., Bozhenkov, S. A., Abdullaev, S. S., TEXTOR Team, Jakubowski, M. W.   +4 more
openaire   +5 more sources

Effect of resonant magnetic perturbations on particle confinement [PDF]

Nuclear Fusion, 2009
The effect of externally applied resonant magnetic perturbations (RMPs) on plasma particle transport is investigated based on two fluid equations. It is found that, depending on the frequency and direction of plasma rotation, the RMP of a moderate amplitude can either increase or decrease the plasma density gradient around the corresponding rational ...
Yu, Q., Günter, S.
openaire   +3 more sources

Control of Transport-Barrier Relaxations by Resonant Magnetic Perturbations

Physical Review Letters, 2009
Transport-barrier relaxation oscillations in the presence of resonant magnetic perturbations are investigated using three-dimensional global fluid turbulence simulations from first principles at the edge of a tokamak. It is shown that resonant magnetic perturbations have a stabilizing effect on these relaxation oscillations and that this effect is due ...
Leconte, Michael, Beyer, P., Garbet, Xavier, Benkadda, S.   +3 more
openaire   +4 more sources

Validation of density pump-out by pedestal-foot magnetic island formation prior to ELM suppression in KSTAR and DIII-D tokamaks

Nuclear Fusion, 2023
TM1 nonlinear two-fluid simulations reveal key characteristics of density pump-out caused by pedestal-foot island formation when applying resonant magnetic perturbation (RMP).
Q.M. Hu, J.-K. Park, S.M. Yang, S.K. Kim, N.C. Logan, R. Nazikian, J. Kang, C. Paz-Soldan, W.H. Ko, G.Y. Park   +9 more
doaj   +1 more source

Suppression of resistive interchange instability by external RMP

Nuclear Fusion, 2023
We experimentally investigate the effect of external resonant magnetic perturbation (RMP) on resistive interchange MHD instability which is typically observed in the Large Helical Device. We apply the m / n = 1/1 external RMP to discharges with the m / n
S. Ito, K.Y. Watanabe, Y. Takemura, S. Sakakibara, S. Masamune   +4 more
doaj   +1 more source