Sentences with phrase «of plasma turbulence»

The scientists plan to develop detailed simulations of the emergence of the magnetic field from the subsurface of the Sun into its atmosphere, as well as gain a three - dimensional view of plasma turbulence and magnetic reconnection in space that lead to plasma heating.

Hammett specializes in computational and theoretical studies of the complex physics of plasma turbulence and has been a fellow of the American Physical Society since 1997.

The correlations provide a detailed view of the nature of plasma turbulence.

Not exact matches

Developed turbulence and nonlinear amplification of magnetic fields in laboratory and astrophysical plasmas

Newman, who as a teen developed a fascination with turbulence as a rafting guide in Colorado, arrived at Oak Ridge in 1993 to explore a different kind of turbulence: the plasma of fusing hydrogen atoms inside experimental fusion reactors.

They produced a mathematical model showing that turbulence in fusion plasmas, contrary to prevailing wisdom, bears little resemblance to the snarling rivers of Newman's youth.

Going forward, knowledge of these correlations could be used to predict the behavior of turbulence in magnetically confined plasma.

At the U.S. Department of Energy's (DOE) Princeton Plasma Physics Laboratory (PPPL), scientists have assembled a large database of detailed measurements of the two dimensional (2 - D) structure of edge plasma turbulence made visible by a diagnostic technique known as gas puff imPlasma Physics Laboratory (PPPL), scientists have assembled a large database of detailed measurements of the two dimensional (2 - D) structure of edge plasma turbulence made visible by a diagnostic technique known as gas puff implasma turbulence made visible by a diagnostic technique known as gas puff imaging.

Physicists at the U.S. Department of Energy's (DOE) Princeton Plasma Physics Laboratory (PPPL) have simulated the spontaneous transition of turbulence at the edge of a fusion plasma to the high - confinement mode (H - mode) that sustains fusion reacPlasma Physics Laboratory (PPPL) have simulated the spontaneous transition of turbulence at the edge of a fusion plasma to the high - confinement mode (H - mode) that sustains fusion reacplasma to the high - confinement mode (H - mode) that sustains fusion reactions.

«These simulations take a deep dive into another level to look at how turbulence in one part of the plasma varies with respect to turbulence in another part.»

«This study is an incremental step toward a fuller understanding of turbulence,» said physicist Stewart Zweben, lead author of the research published in the journal Physics of Plasmas.

In each of these discharges, a gas puff illuminated the turbulence near the edge of the plasma, where turbulence is of special interest.

«It could help us understand how turbulence functions as the main cause of leakage of plasma confinement.»

One school proposes that the transformation comes from a turbulence - generated sheared flow of edge plasma generated by a process called «Reynolds stress.»

Over the course of the past 30 to 40 years, they came to realise that turbulence and plasma flow are linked and regulate each other.

Physicists found in the 1980s that toroidally shaped plasmas of the tokamak type offer a path to low turbulence thanks to their ability to self - organise.

One of the most harmful phenomena these investigations have discovered is the drift instability, which leads to small - scale turbulence of the plasma that efficiently transports heat and particles by convection to the outer regions, where they are lost and unable to contribute to nuclear fusion.

But besides having applications to possible power plants, there is still also a lot to investigate in the basic physics of turbulence in 3D inhomogeneous magnetized plasmas.

Chris Bishop of AEA Technology says that the best condition for fusion, where turbulence in the plasma is at a minimum, is also the hardest to set up.

As a result, we clarified that the influence of the ion mass appeared remarkably in a high - density plasma and that the detailed physical mechanism in which turbulence is suppressed through an effect caused by electron - ion collisions.

As has been clarified above, a complete image of turbulence suppression in a plasma with large ion mass may be expressed schematically.

This is a schematic image of trapped electron instability and the mechanism for the suppression of turbulence in deuterium plasma.

Turbulence behavior in high - temperature plasma confined in the magnetic field is described mathematically through a dynamical equation in five - dimensional space (the three coordinates of space to which two components of particle velocity are added).

«The turbulent healing powers of plasma: By revealing the origins of turbulence, new computer simulations may lead to more effective medical therapies using plasma.»

It has also been found that under some conditions of turbulence, when lithium is carefully injected, temperature and pressure of the plasma increases and the condition becomes ideal for fusion to occur.

Researchers have long wondered about the full impact of the recycled atoms on plasma turbulence.

«It approximately computes the plasma transport billions of times faster than a gyrokinetic multiscale turbulence simulation run on high - performance supercomputers.»

Diagnostics supplied by the University of Wisconsin - Madison and the University of California, Los Angeles measured the resulting turbulence, or random fluctuations and eddies, that took place in the plasma.

Also expected to benefit are physicist Weixing Wang, who seeks advanced visualization of the data from turbulence simulation runs, and physicists Josh Breslau and Steve Jardin, who use animated visualizations to help interpret the output of their magnetohydrodynamic codes, which treat plasma as a magnetic fluid.

Phys.org posted a piece about the first basic physics simulation of a type of turbulence at the edge of fusion plasmas.

They include a scientific code that physicist Seung - Hoe Ku runs on two of the world's most powerful supercomputers to study turbulence at the volatile edge of fusion plasmas.

To analyze how the density gradient affected the strength of the electron turbulence, the team fed information about the plasma's temperature and density into a program run on computers at the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility at Lawrence Berkeley National Laboratory in Berkeley, California.

Researchers have long wondered how atoms recycled from the walls of tokamaks that house fusion reactions affect turbulence, the random fluctuation of plasma that can cause heat and particle loss.

Now, physicists at the U.S. Department of Energy's Princeton Plasma Physics Laboratory (PPPL) appear to have gained important new insights into what affects this turbulence, which can impact the leakage of heat from the fusion plasma within tokPlasma Physics Laboratory (PPPL) appear to have gained important new insights into what affects this turbulence, which can impact the leakage of heat from the fusion plasma within tokplasma within tokamaks.

Recent DIII - D experiments have now revealed the intimate connection between turbulence levels and the chirping of the plasma.

The impact of recycling on plasma turbulence.

Hammett was named winner of the Distinguished Research Fellow Award for his work on deepening the theoretical understanding of turbulence in fusion plasmas.

The presence of turbulence in the plasma is widely thought to increase the difficulty of achieving fusion.

Physicists have long regarded plasma turbulence as unruly behavior that can limit the performance of fusion experiments.

Limiting the amount of cool deuterium at the edge of the plasma reduces the difference in temperature between the hot plasma center and the cooler edge, and reduces turbulence.

Experiments show how heating electrons in the center of hot fusion plasma can increase turbulence, reducing the density in the inner core

For example, the model doesn't consider any possible interaction between the plasma and the containing capsule, and highly energetic turbulence might mix parts of the capsule into the plasma and contaminate the fusion fuel.

However, in a previous study involving Cluster, plasma turbulence was observed in the magnetosheath, the region between Earth's bow shock, where the solar wind meets the magnetic field of the Earth, and the magnetosphere — the magnetic bubble which surrounds it.

The turbulence was uncovered using just two of the four Cluster satellites and showed for the first time that the solar wind plasma is extremely structured at this high resolution with turbulent swirls bordered by a sheet of electric current just 20 kilometres across.

Scientists now are teasing out the secrets of complex multi-scaled layers of turbulence in plasmas, the movement of particles through those plasmas, their interaction with magnetic fields, and numerous other phenomena that impact the plasma's ability to be harnessed as an energy source.