Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

A Little Chaos May Go a Long Way in Future Fusion Energy Reactors

28.10.2003


45th Annual Meeting of the Division of Plasma Physics


Application of ergodic magnetic field suppresses ELMs.



In work that makes practical, large-scale fusion energy production increasingly feasible, plasma physicists working at DOE’s DIII-D National Fusion Facility in San Diego are using a little chaos to prevent precious energy from escaping fusion energy devices.

In a magnetic fusion device, or tokamak, one of the most crucial regions for reducing the loss of heat and particles is at the plasma region’s edge. Particle crossing this edge leave the plasma, and carry energy with them, degrading the fusion reactor’s walls, and making it harder for the desired fusion energy production to occur. This problem will only increase for next-generation fusion energy machines such as the proposed ITER facility.


As the energy content of the fusion fuel increases, plasma in the edges has a tendency to become unstable, exhibiting a kind of turbulence that physicists call "Edge Localized Modes", commonly referred to as ELMs. In experiments presented this week, an international team of researchers applied chaotic magnetic fields, in which the field lines point in unpredictable directions, to a small edge region of the plasma in the DIII-D experiment. With the chaotic magnetic field they applied, the researchers significantly reduced the ELM instabilities in the DIII-D plasma, enabling more heat to stay trapped in the fusion fuel and preserving the favorable conditions that allow fusion energy production to occur. Assuming that this approach can be extended to next-step fusion energy devices, it holds the promise of increasing the lives of materials that make up fusion-energy device walls without degrading the performance of the plasma fuel.

Contacts
T. E. Evans, General Atomics, 505-842-1234, evans@fusion.gat.com
T. S. Taylor, General Atomics, taylor@fusion.gat.com
Paul Thomas, CEA, France, paul.richard.thomas@gat.com

David Harris | American Physical Society
Further information:
http://www.aps.org/meet/DPP03/baps/abs/S1880037.html
http://www.aps.org/meet/DPP03/baps/abs/S1880038.html
http://gk.umd.edu/DPP/press2.html

More articles from Physics and Astronomy:

nachricht Breakthrough with a chain of gold atoms
17.02.2017 | Universität Konstanz

nachricht New functional principle to generate the „third harmonic“
16.02.2017 | Laser Zentrum Hannover e.V.

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Biocompatible 3-D tracking system has potential to improve robot-assisted surgery

17.02.2017 | Medical Engineering

Real-time MRI analysis powered by supercomputers

17.02.2017 | Medical Engineering

Antibiotic effective against drug-resistant bacteria in pediatric skin infections

17.02.2017 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>