Physicists Rafi Nazikian and Kiming Hu, whose background is a figure from research. Credit: Elle Starkman / PPPL Commun Fees of Communications
Picture an airplane that can only go one or two heights after taking off. That limitation may be similar to that of scientists who seek to avoid instability by restricting the passage of clean, safe, and abundant fusion energy in donut-shaped talkmaking facilities. U.S. Researchers from the Department of Energy (DOE) at Princeton Plasma Physics Laboratory (PPPL) And General Atomics (GA) have now published a public understanding of this talk ban and how to get rid of it.
Toroidal or donut-shaped, toxins are filled with heat and intense explosions of particles, called edge localized modes (ELMs). These ELMs can damage the walls of the reactor and must be controlled to develop reliable fusion power. Fortunately, scientists have learned to control this ELM by applying a magnetic field with a spraying wave to the surface. Plasma That fuel fusion reactions. However, the ELM team requires very specific conditions that limit the operational operational flexibility of the talkmack reactor.
In a fusion reactor, hydrogen is heated until ionized plasma is formed like a cloud. Credit: ITER
ELM suppression
Now, researchers from PPPL and GA have developed a model Dell that, for the first time, accurately reproduces the conditions for ELM suppression in the DII-D National Fusion facility that GA operates for DOE. The model predicts the conditions under which ELM should be extended to a wider range of operating conditions in Tokmak than possible before suppression. To demonstrate the possibility of fusion power, this work presents important predictions for how to optimize the effectiveness of ELM suppression in the ITER, a large international fusion device under construction in the south of France.
Fusion, the force that drives the sun and stars, binds light elements in the form of plasma – a hot, charged mass composed of free, electrons and atomic nuclei, which make up 99 percent of the visible universe – to produce large amounts of energy. Talkmax is one of the most widely used devices by scientists seeking to mimic fusion as a renewable, carbon-free source of virtually unlimited energy to generate electricity.
PPPL physicists Kiming Hu and Rafi Nazikian are the main authors of the paper describing a model. Physical Review Letters. They note that under normal conditions the corrugated magnetic field can suppress the ELM (e.g.) for very accurate values of plasma flux generating a magnetic field that limits the plasma. This also creates a problem because Tokmak reactors must operate in a wide range of plasma currents in order to explore and optimize the conditions required to generate fusion power.
Correcting the magnetic wave
The authors demonstrate how, by modifying the composition of the helical magnetic wave applied to the plasma, the ELM should be removed in a wide range of plasma current with improved pay generation of fusion power. Hu said he believes these findings could provide ITER with greater operational flexibility that would be needed to demonstrate the practicality of the fusion of Raja. “This model could have significant implications for ELM suppression in ITER,” he said.
Indeed, “what we’ve done is precisely predict when we can achieve ELM suppression over a wide range of plasma currents,” said Nazikian, who oversaw PPPL research on Talkmax. “By trying to understand some of the bizarre results we have seen on DIII-D, we have discovered the key physics that controls the range of ELM suppression that can be achieved using these ripple-wave magnetic fields. We then went back and found a method that could produce huge operational windows of regular ELM suppression in DIII-D and ITER. “
Extended Tokmak .Operation
Findings opens the door to advanced talkmaking operations. Carlos Paz-Solden, a GA scientist and co-author of the paper, said, “This work describes a way to expand the space paradigm to control edge instability in talkmax by modifying the structure of the ripples.” “We continue to test these forecasts with our upgraded field coils that are planned for DIII-D in a few years.”
“If you could only fly at one or two different altitudes, travel would be very limited,” said Brian Greyers, a physicist at PPPL who co-authored the paper. “Fixing the ban will allow the aircraft to fly at higher altitudes to improve its flight path and achieve its goal.” Similarly, the current paper demonstrates an approach that predicts expanding the capabilities of fusion reactors to operate freely from ELMs that damage facilities and hinder the development of talkmax for fusion for RZ.
Reference: QM Hu, R. Nazikian, B.A. Garrison, N.C. Logan, D.M. Orlov, c. “Wide Operational Practical Windows of Edge-Localized Mode Suppression by Resonant Magnetic Partitions in DII-D Talkmac” by Paz-Solden and QU 23 July 2020, Physical Review Letters.
DOI: 10.1103 / fizrivate.125.045001
The basis for this research comes from the DOE DO of Science. Collaborators include researchers from the University of California, San Diego and the Max Planck Institute for Plasma Physics. Data analysis was performed as part of the OMFIT Integrated Modeling Framework developed by GA scientists.
