Inductively Coupled Plasmas (ICP) are well known to exhibit two modes of operation: a low density capacitive E-mode and a high density inductive H-mode. In this study we investigate the E-H transition in a cylindrical ICP, and show the e↵ect of an external magnetic cusp field on the transition dynamics. The plasma is simulated by an Electro-Magnetic Particle-In-Cell Monte Carlo Collision code i...

High dielectric permittivity materials are widely employed in various electronic devices. To satisfy the ongoing miniaturization of devices, with further enhanced permittivities strongly desired. In this work, a novel design epoxy composites based on Ag/Al2O3/3D-BaTiO3 foams hierarchical heterogeneous microstructures prepared. It is found that, spatial distribution Ag particles can be easily co...

The current neutrino oscillation theory asserts that neutrinos are massive subatomic particles, and can undergo their flavor oscillation. First in this article, we examine carefully the current oscillation theory, and argue that a massless neutrino oscillation mechanism based on the Weyl equations for neutrinos is also a feasible theory. This massless neutrino oscillation mechanism resolves bot...

Measuring the equilibrium electron density distribution and its response to perturbations provides important information to magnetically confined plasma research. A multichannel interferometer system is now routinely operating on the new quasihelically symmetric stellator ~HSX! to measure the equilibrium profile and electron density dynamics. The interferometer system has nine viewing chords wi...

Particle transport and its effect on the plasma density distribution remains an important, unresolved issue in magnetic fusion plasmas [1]. Fluctuating magnetic fields can arise from global tearing instabilities that often underlie the sawtooth oscillation [2] and lead to plasma relaxation [3]. Furthermore, magnetic fluctuations are also generated by energetic particles associated with non-indu...

Delayed discharges due to electrical breakdown are observed in modulated pulsed pow er magnetron sputtering (MPPMS) plasma of titanium. The delayed discharge, which is remarkable with decreasing argon gas pressure, transforms the discharge current waveform from a standard comb-like consisting several pulses high power. In addition, delay times, statistical times and formative MPPMS discharges, ...

Three-dimensional (3D) microwave imaging reflectometry has been developed in the large helical device to visualize fluctuating reflection surface which is caused by the density fluctuations. The plasma is illuminated by the probe wave with four frequencies, which correspond to four radial positions. The imaging optics makes the image of cut-off surface onto the 2D (7 × 7 channels) horn antenna ...

We develop a new method for the determination of the absolute value of the magnetic field strength in coronal closed magnetic structures, based on the analysis of flare-generated oscillations of coronal loops. Interpretation of the oscillations observed in terms of global standing kink waves allows to connect the period of the oscillations and the loops length with the magnetic field strength i...

We show a new resonance acceleration scheme for generating ultradense relativistic electron bunches in helical motions and hence emitting brilliant vortical γ-ray pulses in the quantum electrodynamic (QED) regime of circularly-polarized (CP) laser-plasma interactions. Here the combined effects of the radiation reaction recoil force and the self-generated magnetic fields result in not only trapp...

Ground based tests were performed at the Max-Planck-Institute für Kernphysik Van de Graaff accelerator in Heidelberg, Germany to explore radiofrequency (RF) emission associated with hypervelocity particle impact induced plasma. Meteoroids and dust traveling between 11 and 72.8 km/s are constantly bombarding spacecraft while on orbit. These hypervelocity particles may cause electrical anomalies ...