We use pulsed-laser heating of hydrogen at static pressures in the megabar pressure region to search for the plasma phase transition to liquid atomic metallic hydrogen. We heat our samples substantially above the melting line and observe a plateau in a temperature vs. laser power curve that otherwise increases with power. This anomaly in the heating curve appears correlated with theoretical pre...

It is demonstrated experimentally that strongly coupled plasma exhibits solid superheating. A 2D suspension of microspheres in dusty plasma, initially self-organized in a solid lattice, was heated and then cooled rapidly by turning laser heating on and off. Particles were tracked using video microscopy, allowing atomistic-scale observation during melting and solidification. During rapid heating...

Dynamics of burning plasmas are studied by use of one dimensional simulation code with current diffusive ballooning mode model. Focusing on the effects of current profile control, burning performance is evaluated. The ohmic plasma is heated by additional heating and ignited state of the plasma is reached.

Background/introduction The minimally invasive nature of FUS makes it an excellent candidate technology for epilepsy surgery. The limitation of currently available FUS systems is that the lesion must be deep in the brain to avoid bone heating. Thus, it is best suited for “subcortical” epilepsies, i.e. epilepsy resulting from lesions below the cortex. It is also desirable that the lesion be rela...

We present a biocompatible, all-glass, 0.2 mm diameter, fiber-optic probe that combines an extrinsic Fabry-Perot interferometry and a proximal fiber Bragg grating sensor; the probe enables dual pressure and temperature measurement on an active 4 mm length, with 40 Pa and 0.2°C nominal accuracy. The sensing system has been applied to monitor online the radiofrequency thermal ablation of tumors i...

Comparative studies were carried out to elucidate the most essential parameter(s) for control of density profiles in LHD heliotron and JT-60U tokamak plasmas. Different collisionality dependence was found between two devices. Change of fluctuation property was observed at different density profile in both devices in plasma core region. In JT-60U, increase of radial correlation length was observ...

Ye.O. Kazakov, J. Ongena, D. Van Eester, R. Bilato, R. Dumont, E. Lerche, M. Mantsinen and A. Messiaen 1 Laboratory for Plasma Physics, LPP-ERM/KMS, EUROfusion Consortium member, Brussels, Belgium 2 Max-Planck-Institut für Plasmaphysik, Garching, Germany 3 CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France 4 Catalan Institution for Research and Advanced Studies, Barcelona, Spain 5 Barcelona Supe...

In GAMMA 10/PDX, ion heating is achieved using slow wave in the cyclotron frequency absorbed near resonance layer. However, high-density plasma, less likely to be excited due shielding effect. To overcome this challenge, researchers have investigated difference (DF) waves by nonlinear interaction of fast been investigated. The can propagate core plasma even making DF-waves an efficient option f...

-&-Fast wave heating at the second, third and fourth harmonics of the ion cyclotron resonance, and slow wave heating at the fundamental in a single ion species hydrogen plasma, are found to be in gQod agreement with warm plasma theory at rf power levels 5130 kW. Ion heating is negligible off an eigenmode. Ion body temperatures are more than doubled to 75 eV from the 35 eV ohmically heated case ...