Electron Cyclotron Heating and Current Drive
Electron cyclotron heating and current drive using the electron Bernstein modes
... 5.1.2 Electron Cyclotron Heating Electron Bernstein Waves are strongly absorbed near cyclotron harmonics, and the sharp edge to the resonant region means that the absorption is highly ...
126
Advanced electron cyclotron heating and current drive experiments on the stellarator Wendelstein 7-X
... Fig. 6. Temporal evolution of a cleaning discharge @ 2.7 MW. Stray radiation after 0.1s cumulated discharge time compared with 3s cumulated discharge time (as published in [12]) After 3 days of W7-X operation, the glow ...
6
Benchmarking of electron cyclotron heating and current drive codes on ITER scenarios within the European Integrated Tokamak Modelling framework
... Edge refraction has a large impact on beam propagation indeed. Figure 3 shows the di ff erence among a straight trajectory and the trajectory of the beam center computed for the EL40 case: di ff er- ences as large as 10 ...
6
1 EX/P5-11. Control of the Sawtooth Instability by Electron Cyclotron Heating and Current Drive In the TCV and ASDEX Upgrade Tokamaks.
... tron cyclotron heating (ECH) and current drive (ECCD) are prime candidates for such control as the all important deposition location can be adjusted using external control parameters ...
5
GA A25510 BENCHMARKING OF CODES FOR ELECTRON CYCLOTRON HEATING AND ELECTRON CYCLOTRON CURRENT DRIVE UNDER ITER PARAMETERS
... relatively quick computer codes be available for prediction of wave coupling, propagation, damping, and current drive at realistic levels of EC power. To this end, a number of codes have been developed in ...
14
Power Requirements for Electron Cyclotron Current Drive and Ion Cyclotron Resonance Heating for Sawtooth Control in ITER
... ITER electron cyclotron heating and current drive system consists of up to 26 gyrotrons operating at 170GHz and delivering 1-2 MW each, for a nominal injected power into the plasma of ...
34
Microinstabilities in high power electron cyclotron heating of plasmas
... of current drive calculations based on PEL heating (Nevins, ...carrying current around the ...a current in the plasma, but the exact form of the distribution function cannot be ...
211
Electron Cyclotron Heating Start-Up Experiments on TST-2
... plasma current and forming an ST configuration without using the central Ohmic ...devices. Electron cyclotron heating (ECH) start-up is one such method, and many experiments on ST devices have ...
5
GA A25827 EFFECTS OF ELECTRON CYCLOTRON CURRENT DRIVE, COUNTER-NBI, AND ROTATIONAL ENTRAINMENT ON NEOCLASSICAL TEARING MODE CONTROL IN DIII-D
... E FFECTS OF E LECTRON C YCLOTRON C URRENT D RIVE , C OUNTER -NBI, AND R. Prater, et al. R OTATIONAL E NTRAINMENT ON N EOCLASSICAL T EARING M ODE C ONTROL IN DIII-D 2 G ENERAL A TOMICS R EPORT GA-A25827 II. Avoidance of ...
7
Recent Results from the Development of the Electron Cyclotron Heating System for JT-60SA toward High-Power Long-Pulse Operations
... Electron cyclotron (EC) waves are widely used in tokamaks for many purposes such as electron heating, cur- rent drive, and instability control because of their capa- bility for a highly ...
5
Capabilities of the ITER Electron Cyclotron Equatorial Launcher for Heating and Current Drive
... ITER Electron Cyclotron Equatorial Launcher is designed to be one of the heating systems to assist and sustain the development of various ITER plasma sce- narios starting with the very first plasma ...
6
Capabilities of the ITER Electron Cyclotron Equatorial Launcher for Heating and Current Drive
... A.. Various H&CD combinations are feasible delivering power either to a single row or to more than one row in different directions.. points: α =0 toroidal steer.. [r] ...
17
Assessment of Electron-Cyclotron-Current-Drive-Assisted Operation in DEMO
... EC current drive e ffi ciency approaching those usually reported for neutral beam current ...non-inductive current should be as high as possible to approach steady-state ...reason, ...
6
Current drive by high intensity, pulsed, electron cyclotron wave packets
... Abstract. The nonlinear interaction of electrons with a high intensity, spatially localized, Gaussian, electro- magnetic wave packet, or beam, in the electron cyclotron range of frequencies is described by ...
5
Top Launch for Higher Off-axis Electron Cyclotron Current Drive Efficiency
... off-axis current drive is crucial for economic, steady-state tokamak fusion power ...Launch" electron cyclotron current drive (ECCD) is one promising method for driving strong ...
6
Design and Research of Electron Cyclotron Resonance Heating and Current Dive System on HL-2M Tokamak
... Fig. 9. Outer structure of the plug-in unit and equatorial launcher Available space, port shape and port size of HL-2M tokamak suggest using two different kinds of steering mechanism for the poloidal and toroidal ...
5
First Demonstration of Rotational Transform Control by Electron Cyclotron Current Drive in Large Helical Device
... The electron trapping effect is another critical ...driven current because of the Ohkawa effect, as the diffusion in velocity space caused by electron cyclotron damping is mainly along the ...
6
Effect of Electron Cyclotron Current Drive on the Ion Temperature in the Plasma Core Region of the Large Helical Device
... The main components of the ECH system on the LHD are five high-power (> 1 MW each) gyrotrons, three oscil- lating at 77 GHz (the fundamental resonance frequency in the 2.75 T magnetic field), and two oscillating at ...
5
Estimation of the j × B Force Produced by Electron Cyclotron Heating in HSX Plasma
... Applying GNET code, we evaluated the velocity dis- tribution of δ f in the QHS configuration. Figures 3 (a) and 3 (b) show the velocity distribution at normalized mi- nor radius ρ ∼ 0.1 and 0.3 surface. The velocity ...
5
Efficient Heating at the Third-Harmonic Electron Cyclotron Resonance in the Large Helical Device
... Two kinds of antenna systems for ECH are installed in the LHD vacuum vessel. The vertical injection antenna system consists of two or four millimeter-wave focusing and steering mirrors. The high power measurement of this ...
5