Progress in understanding lower hybrid current drive (LHCD) at high density has been made
through experiments and modeling, which is encouraging given the need for an efficient off …

Abstract A 4.6 GHz lower-hybrid current drive (LHCD) system has been firstly commissioned
in EAST in the 2014 campaign. The first LHCD results with 4.6 GHz show that LHW can be …

Recent experiments on EAST have achieved the first long pulse H-mode (61 s) with zero
loop voltage and an ITER-like tungsten divertor, and have demonstrated access to broad …

Radio-frequency (rf) waves are a powerful tool for improving the performance and stability of
tokamak plasmas through heating and current drive mechanisms, allowing current density …

EAST has been equipped with two high power lower hybrid current drive (LHCD) systems
with operating frequencies of 2.45 GHz and 4.6 GHz. Comparative LHCD experiments with …

Experimental and modeling investigations on the DIII-D and EAST tokamaks show the
attractive transport and stability properties of fully noninductive, high poloidal-beta (β P) …

With the capability of saving flux consumption in the current ramp up phase, controlling the
safety factor (q) profile, providing the required off-axis current drive (CD), a lower hybrid …

First principle modeling of the lower hybrid (LH) current drive in tokamak plasmas is a
longstanding activity, which is gradually gaining in accuracy thanks to quantitative …

A high field side (HFS) lower hybrid current drive launch scenario improves wave
accessibility, has single pass damping at r/a~ 0.6–0.8 and good current drive efficiency in …

Extensive experimental data support reliable power deposition and current drive by lower-
hybrid (LH) waves in conditions where a large spectral gap exists between the nominal …