Results 11 to 20 of about 7,651 (149)

Confirmation of the topology of the Wendelstein 7-X magnetic field to better than 1:100,000

Nature Communications, 2016
Early stellarator designs suffered from high particle losses, an issue that can be addressed by optimization of the coils. Here the authors measure the magnetic field lines in the Wendelstein 7-X stellarator, confirming that the complicated design of the
T. Sunn Pedersen, M. Otte, S. Lazerson, P. Helander, S. Bozhenkov, C. Biedermann, T. Klinger, R. C. Wolf, H. -S. Bosch, The Wendelstein 7-X Team   +9 more
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A megawatt-level 28 GHz heating system for the National Spherical Torus Experiment Upgrade

EPJ Web of Conferences, 2015
The National Spherical Torus Experiment Upgrade (NSTX-U) will operate at axial toroidal fields of ≤ 1 T and plasma currents, Ip ≤ 2 MA. The development of non-inductive (NI) plasmas is a major long-term research goal for NSTX-U.
Taylor G., Ellis R.A., Fredd E., Gerhardt S. P., Greenough N., Harvey R. W., Hosea J. C., Parker R., Poli F., Raman R., Shiraiwa S., Smirnov A. P., Terry D., Wallace G., Wukitch S.   +14 more
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Novel concept suppressing plasma heat pulses in a tokamak by fast divertor sweeping

Scientific Reports, 2022
One of the remaining challenges in magnetic thermonuclear fusion is survival of the heat shield protecting the tokamak reactor vessel against excessive plasma heat fluxes.
J. Horacek, S. Lukes, J. Adamek, J. Havlicek, S. Entler, J. Seidl, J. Cavalier, J. Cikhardt, V. Sedmidubsky   +8 more
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Further upgrades of the ASDEX Upgrade ICRF system [PDF]

EPJ Web of Conferences
The original plans were to operate the tokamak ASDEX Upgrade (AUG) for ten years. The flexibility of the experiment lead to the fact, that AUG is now operating for over three decades.
Faugel Helmut, Bobkov Volodymyr, Schmidt Alexander Benjamin, Peglau Matthias, Helou Walid, Mulzer Roger, Fünfgelder Helmut, Girka Oleksii, Ochoukov Roman, Mendelevitch Boris   +9 more
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Study on the Applicability of Neutron Radiation Damage Method Used for High-Temperature Superconducting Tape Based on Geant4 and SRIM

Science and Technology of Nuclear Installations, 2021
High-temperature superconducting material is a promising candidate to fabricate superconducting magnet for magnetic confinement fusion reactors. The DPA number of the 1 µm thick superconducting layer in a high temperature superconducting tape under ...
Ying Zheng, Jinxing Zheng, Xudong Wang
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ECRH scenarios with selective heating of trapped/passing electrons in the W7-X Stellarator

EPJ Web of Conferences, 2015
Using specific features of the magnetic equilibrium in the W7-X stellarator, the ECRH scenarios with combined X2 and X3 modes are discussed. The RF beams for operation with X2 and X3 modes need to be launched from low- and, via the remote steering ...
Marushchenko N.B., Beidler C.D., Erckmann V., Geiger J., Helander P., Laqua H.P, Maassberg H., Turkin Y.   +7 more
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Recent Progress in ICRF Experiments on the Experimental Advanced Superconducting Tokamak (EAST) [PDF]

EPJ Web of Conferences
Ion Cyclotron Range of Frequency (ICRF) heating is a major auxiliary heating method used on the Experimental Advanced Superconducting Tokamak (EAST). This paper summarizes recent progress in ICRF experiments on EAST, including the upgrade of ICRF heating
Zhang Wei, Antar Ghassan, Cheng Yan, Deng Xu, Ju Songqing, Kazakov Yevgen, Liu Lunan, Mao Yuzhou, Ongena Jozef, Qin Chengming, Wang Lei, Wang Yongsheng, Wouters Tom, Yang Hua, Yuan Shuai, Zhang Kai, Zhang Xinjun   +16 more
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First feedback-controlled divertor detachment in W7-X: Experience from TDU operation and prospects for operation with actively cooled divertor

Nuclear Materials and Energy, 2023
In the last experimental campaign (OP1.2b) of the stellarator Wendelstein 7-X (W7-X), boronisation as a mean for first wall conditioning was applied for the first time which led to strongly reduced impurity fluxes from plasma-facing components.
M. Krychowiak, R. König, T. Barbui, S. Brezinsek, J. Brunner, F. Effenberg, M. Endler, Y. Feng, E. Flom, Y. Gao, D. Gradic, P. Hacker, J.H. Harris, M. Hirsch, U. Höfel, M. Jakubowski, P. Kornejew, M. Otte, A. Pandey, T.S. Pedersen, A. Puig, F. Reimold, O. Schmitz, T. Schröder, V. Winters, D. Zhang   +25 more
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The role of rectified currents in far-field RF sheaths and in SOL losses of HHFW power on NSTX

Nuclear Materials and Energy, 2017
Radio-frequency (RF) rectification is an important sheath phenomenon for wave heating of plasma in fusion devices and is proposed to be the mechanism responsible for converting high-harmonic fast-wave (HHFW) power in the National Spherical Torus ...
R.J. Perkins, J.C. Hosea, M.A. Jaworski, R.E. Bell, N. Bertelli, G.J. Kramer, L. Roquemore, G. Taylor, J.R. Wilson   +8 more
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Runaway electron diagnostics for the COMPASS tokamak using EC emission [PDF]

EPJ Web of Conferences, 2019
An electron cyclotron emission (ECE) diagnostic of suprathermal electrons was utilised for runaway electron (RE) experiments purposes in the COMPASS tokamak.
Farnik Michal, Urban Jakub, Zajac Jaromir, Bogar Ondrej, Ficker Ondrej, Macusova Eva, Mlynar Jan, Cerovsky Jaroslav, Varavin Mikita, Weinzettl Vladimir, Hron Martin   +10 more
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