Results 61 to 70 of about 994 (182)

Mitigation of sawtooth transient heat flux in the MAST-U Super-X divertor with deuterium and nitrogen

Nuclear Fusion
The MAST Upgrade Super-X divertor (SXD) protects plasma-facing components from heat fluxes during transient events. This paper examines heat loads from sawtooth crashes with energies $\Delta W_{\mathrm{sawtooth}} \approx 2$ – $9\ \mathrm{kJ}$ and ...
Rory Scannell, Jack Flanagan, Zhouji Huang, James Harrison, Kevin Verhaegh, Scott Silburn, Peter Ryan, Stuart Henderson, Nicola Lonigro, Sid Leigh, David Moulton, Sam Blackmore, the MAST-U Team, the EUROfusion Tokamak Exploitation Team   +13 more
doaj   +1 more source

Destabilization of fast-ion-induced long sawteeth by localized current drive in the JET tokamak

, 2004
In a tokamak fusion reactor the energetic alpha particles will transiently stabilize the magnetohydrodynamic activity causing sawtooth oscillations. The crash events terminating long sawtooth free periods can provide seed islands for neoclassical tearing
Eriksson, L.G., Sauter, O., Noterdaeme, J.M., McDonald, D., Mantsinen, M.J., Mueck, A., Coda, S., Westerhof, E., Mayoral, M.L., Buttery, R.J., Johnson, T., de Vries, P.   +11 more
core   +2 more sources

Numerical studies of sawtooth crashes with non-monotonic safety factor profiles

Nuclear Fusion
The sawtooth crashes with non-monotonic q profiles are numerically investigated by the three-dimensional, toroidal-geometry MHD code (CLT). We find that, when the initial q profiles are non-monotonic, the precursors of the sawtooth crashes are with high ...
X. Wang, W. Zhang, Z.W. Ma
doaj   +1 more source

Real-time control of multiple MHD instabilities on TCV by ECRH/ECCD

EPJ Web of Conferences, 2012
Highly localized deposition of ECRH/ECCD is particularly suited for MHD control, in particular when combined with real-time beam orientation and power control capabilities.
Sauter O., Moret J-M., Martin Y., Goodman T.P., Duval B.P., Coda S., Canal G., Felici F., Rossel J.X., Testa D.   +9 more
doaj   +1 more source

Data for article "Ionospheric Signatures Above Sequent Sawteeth Of Giant Undulations: Multiple Low-Earth-Orbit Satellites Observations"

Here is data used in article "Ionospheric Signatures Above Sequent Sawteeth Of Giant Undulations: Multiple Low-Earth-Orbit Satellites Observations".
Yi-Jia Zhou (17849987)
core   +1 more source

Demonstration of sawtooth period control with EC waves in KSTAR plasma

EPJ Web of Conferences, 2015
The sawtooth period control in tokamak is important issue in recent years because the sawtooth crash can trigger TM/NTM instabilities and drive plasmas unstable.
Jeong J. H., Bae Y. S., Joung M., Kim D., Goodman T. P., Sauter O., Sakamoto K., Kajiwara K., Oda Y., Kwak J. G., Namkung W., Cho M. H., Park H., Hosea J., Ellis R.   +14 more
doaj   +1 more source

The influences of circular saws with sawteeth of mic-zero-degree radial clearance angles on surface roughness in wood rip sawing

, 2017
International audienceAbstractKey messageThe sawtooth parameters of the side edges likely affect surface roughness to a large extent in wood sawing. Our results point out the need to optimize the parameters of the side edges in order to maximize wood ...
Li, Weiguang, Li, Bo, Zhang, Zhankuan, Weiguang Li, Xiaorui Peng, Bo Li, Peng, Xiaorui, Zhankuan Zhang   +7 more
core   +1 more source

Influence of sawtooth oscillations on fast ions in a stellarator

Nuclear Fusion
Sawtooth oscillations in tokamaks frequently lead to the redistribution of energetic ions, mainly on passing orbits, causing their expulsion from the core.
D. Moseev, M. Zanini, H. Kasahara, H.P. Laqua, H. Funaba, W.H.J. Hayashi, W. Heidbrink, K. Ida, H. Igami, Y. Kawamoto, N. Kenmochi, S.A. Lazerson, M. Nishiura, R. Ochoukov, K. Ogawa, M. Rud, M. Salewski, T. Seki, N. Tamura, K. Tanaka, T. Tokuzawa, M. Yoshinuma   +21 more
doaj   +1 more source

Real-Time Control of Sawteeth and NTMs in TCV and ITER [PDF]

, 2015
The main goal of this thesis is to demonstrate the capability of magneto-hydrodynamic (MHD) instability control, particularly sawteeth and neoclassical tearing modes (NTMs), in order to achieve high performance operation. Experiments and simulations have
Kim, Doohyun
core   +2 more sources

Core electron temperature turbulence and transport during sawtooth oscillations in the DIII-D tokamak

Nuclear Fusion
Sawteeth are one of the concerning instabilities in ITER and future burning plasma experiments. Sawtooth dynamics and its interaction with broadband plasma turbulence has been a challenge for predictive simulations of core transport in future fusion ...
G. Wang, T.L. Rhodes, Q.T. Pratt, W.A. Peebles, N.A. Crocker, R. Hong, M.E. Austin, M.A. Van Zeeland, S.P. Smith   +8 more
doaj   +1 more source