Magnetic measurements during dc helicity injection tokamak startup indicate Alfvénic turbulence
in the injected current streams mediates magnetic relaxation and results in macroscopic …

Analyses of the DIII-D ITER Baseline Scenario database support that the disruptive m, n= 2,
1 magnetic islands are pressure gradient driven, non-linear instabilities seeded in a …

Control for tokamaks, the leading candidate technology for nuclear fusion, is an important
pursuit since the realization of nuclear fusion as an energy source would result in virtually …

The development of current startup and drive techniques is a crucial need for spherical
tokamaks in the context of magnetic confinement nuclear fusion. Local helicity injection (LHI) is a …

Microchannel plates that have been constructed by atomic layer deposition of resistive and
secondary emissive layers, onto borosilicate glass microcapillary arrays provide a novel …

Experiments on the P egasus ST are advancing the physics and technology basis of local
helicity injection (LHI). LHI injects helicity with relatively intense electron current sources in the …

A major goal of the spherical tokamak (ST) research program is accessing a state of low
internal inductance ℓ i⁠, high elongation κ⁠, and high toroidal and normalized beta (⁠ β t and β …

We present a tearing stable, stationary and reproducible operating solution for DIII-D plasmas
characterized by the ITER Baseline Scenario normalized parameter set and shape. In …

Local helicity injection (LHI) is a non-solenoidal current drive capable of achieving high-tokamak
startup with non-invasive current injectors in the plasma scrape-off layer. The choice of …

Two new magnetic probes have been deployed on the Pegasus spherical tokamak to study
the dynamics of local helicity injection non-solenoidal plasma start-up and current drive. The …