Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Deuterium Uptake in Magnetic Fusion Devices with Lithium Conditioned Carbon Walls: JICS-led collaborative research on lithium coatings unlocks mystery surrounding the harnessing of fusion energy

 Dynamic in lithiated graphite: a) Experiments show that deuterium bombardment dramatically increases the surface oxygen; b) Simulation shell for the D-impact chemistry in lithiated and oxidized carbon
Dynamic in lithiated graphite: a) Experiments show that deuterium bombardment dramatically increases the surface oxygen; b) Simulation shell for the D-impact chemistry in lithiated and oxidized carbon

Abstract:
he research of a multi-institutional team from the U.S., Japan, and France, led by Predrag S. Krstic of the Joint Institute for Computational Sciences and Jean Paul Allain of Purdue University has answered the question of how the behavior of plasma—the extremely hot gases of nuclear fusion—can be controlled with ultra-thin lithium films on graphite walls lining thermonuclear magnetic fusion devices.

Deuterium Uptake in Magnetic Fusion Devices with Lithium Conditioned Carbon Walls: JICS-led collaborative research on lithium coatings unlocks mystery surrounding the harnessing of fusion energy

Knoxville, TN | Posted on February 1st, 2013

"It is remarkable that seemingly insignificant lithium depositions can profoundly influence the behavior of something as powerful as fusion plasmas," Krstic said.

Krstic and his team explain their research in a paper titled "Deuterium Uptake in Magnetic Fusion Devices with Lithium Conditioned Carbon Walls," recently accepted for publication in Physical Review Letters.

"How lithium coatings on graphite surfaces control plasma behavior has largely remained a mystery until our team was able to combine predictions from quantum-mechanical supercomputer simulations on the Kraken and Jaguar systems at Oak Ridge National Laboratory and in situ experimental results from the Purdue group to explain the causes of the delicate tunability of plasma behavior by a complex lithiated graphitic system," Krstic said. "Surprisingly, we find that the presence of oxygen in the surface plays the key role in the bonding of deuterium, while lithium's main role is to bring the oxygen to the surface. Deuterium atoms preferentially bind with oxygen and carbon-oxygen when there is a comparable amount of oxygen to lithium at the surface. That finding well matches a number of controversial experimental results obtained within the last decade."

The performance demands on plasma-facing components and the other materials that would surround future fusion power reactors is one of the reasons the U.S. National Academy of Engineering has ranked the quest for fusion as one of the top grand challenges for engineering in the 21st Century. Harnessing energy from thermonuclear magnetic fusion has been challenged in part by the extreme environment of hot and dense plasma interacting with the boundary fusion reactor walls. The strong coupling between the plasma edge and the wall surface, which causes erosion of the wall material, retention of radioactive tritium, and pollution of the plasma, has been hampered by a lack of fundamental understanding of what takes place at the interface where the plasma and solid material meet.

Recent research in which lithium coatings have been deposited on a variety of metallic and graphitic surfaces has provided evidence that plasma strongly responds on the deposited films. In fact, the use of ultra-thin coatings of lithium on graphite has resulted in an unprecedented influence on plasma behavior, including control of hydrogen recycling—one of the most important issues in the construction of future magnetic fusion-energy devices—and extraordinary improvements in energy confinement.

The study of the lithium coatings also impacts many areas beyond magnetic fusion, including nanoelectronics, lithium batteries, computational materials science, bioengineering and biophysics, plasma physics, and theoretical physics and chemistry.

"This work can lead to improvement of the hydrogen-recycling properties of the fusion materials facing plasma, as well as advancements in other areas," Krstic said. "We hope that our finding will inspire future theoretical and experimental work in diverse applications not only with lithium coatings on various materials but also with combinations of other types of materials that are potentially good ‘oxygen-getters'—for example elements of the first two groups of the periodic system."

Authors of the paper are P.S. Krstic, J.P. Allain, C.N. Taylor, J. Dadras, S. Maeda, K. Morokuma, J. Jakowski, A. Allouche, and C.H. Skinner. Support for the project was provided by the U.S. Department of Energy (DOE); the National Science Foundation (NSF), including its Extreme Science and Engineering Discovery Environment; and the Japan Science and Technology Agency.

Computational resources for the simulations were provided by the National Institute for Computational Sciences on the Kraken supercomputer, and the National Center for Computational Sciences on the Jaguar supercomputer. Laboratory experiments were conducted at Purdue University and Princeton Plasma Physics Laboratory.

####

About Joint Institute for Computational Sciences
The Joint Institute for Computational Sciences was established by the University of Tennessee and Oak Ridge National Laboratory (ORNL) to advance scientific discovery and state-of-the-art engineering, and to further knowledge of computational modeling and simulation. JICS pursues its mission by taking full advantage of petascale-and-beyond computers housed at ORNL, and by educating a new generation of scientists and engineers well-versed in the application of computational modeling and simulation for solving the most challenging scientific and engineering problems.

About NICS

The National Institute for Computational Sciences (NICS) operates the University of Tennessee supercomputing center, funded in part by the National Science Foundation. NICS is a major partner in NSF’s Extreme Science and Engineering Discovery Environment, known as XSEDE. The Remote Data Analysis and Visualization Center (RDAV) is a part of NICS.

For more information, please click here

Contacts:
Predrag Krstic

National Institute for Computational Sciences

Copyright © Joint Institute for Computational Sciences

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Defects in atomically thin semiconductor emit single photons: Researchers create optically active quantum dots in 2-D semiconductor for the first time; may have applications for integrated photonics May 4th, 2015

Arrowhead to Report Fiscal 2015 Second Quarter Financial Results May 4th, 2015

From brittle to plastic in 1 breath: Rice University theorists show environments can alter 2-D materials' basic properties May 4th, 2015

Nanoparticles in consumer products can significantly alter normal gut microbiome May 4th, 2015

Physics

Oxford Instruments announces winners of the 2015 Sir Martin Wood Science Prize for China May 2nd, 2015

Electron chirp: Cyclotron radiation from single electrons measured directly for first time: Method has potential to measure neutrino mass and look beyond the Standard Model of the universe April 29th, 2015

Laboratories

ORNL researchers probe chemistry, topography and mechanics with one instrument May 2nd, 2015

Artificial photosynthesis could help make fuels, plastics and medicine April 29th, 2015

Electron chirp: Cyclotron radiation from single electrons measured directly for first time: Method has potential to measure neutrino mass and look beyond the Standard Model of the universe April 29th, 2015

Chemists strike nano-gold: 4 new atomic structures for gold nanoparticle clusters: Research builds upon work by Nobel Prize-winning team from Stanford University April 28th, 2015

More is less in novel electronic material: Adding electrons actually shrinks the system April 27th, 2015

Thin films

ORNL researchers probe chemistry, topography and mechanics with one instrument May 2nd, 2015

Chemistry

Chemists strike nano-gold: 4 new atomic structures for gold nanoparticle clusters: Research builds upon work by Nobel Prize-winning team from Stanford University April 28th, 2015

Scientists join forces to reveal the mass and shape of single molecules April 27th, 2015

Govt.-Legislation/Regulation/Funding/Policy

Defects in atomically thin semiconductor emit single photons: Researchers create optically active quantum dots in 2-D semiconductor for the first time; may have applications for integrated photonics May 4th, 2015

From brittle to plastic in 1 breath: Rice University theorists show environments can alter 2-D materials' basic properties May 4th, 2015

ORNL researchers probe chemistry, topography and mechanics with one instrument May 2nd, 2015

Research seeks alternatives for reducing bacteria in fresh produce using nanoengineering April 29th, 2015

Nanoelectronics

Surface matters: Huge reduction of heat conduction observed in flat silicon channels April 23rd, 2015

New class of 3D-printed aerogels improve energy storage April 22nd, 2015

‘Oxford Instruments Young Nanoscientist India Award 2015’ to Prof. Arindam Ghosh April 20th, 2015

Advances in molecular electronics: Lights on -- molecule on: Researchers from Dresden and Konstanz succeed in light-controlled molecule switching April 20th, 2015

Announcements

Defects in atomically thin semiconductor emit single photons: Researchers create optically active quantum dots in 2-D semiconductor for the first time; may have applications for integrated photonics May 4th, 2015

Arrowhead to Report Fiscal 2015 Second Quarter Financial Results May 4th, 2015

From brittle to plastic in 1 breath: Rice University theorists show environments can alter 2-D materials' basic properties May 4th, 2015

Nanoparticles in consumer products can significantly alter normal gut microbiome May 4th, 2015

Energy

Engineering a better solar cell: UW research pinpoints defects in popular perovskites May 1st, 2015

Artificial photosynthesis could help make fuels, plastics and medicine April 29th, 2015

Unique microscopic images provide new insights into ionic liquids April 28th, 2015

ISDC To Showcase Northrop Grumman/Caltech Push Toward Space Solar Power April 28th, 2015

Battery Technology/Capacitors/Generators/Piezoelectrics/Thermoelectrics/Energy storage

Unique microscopic images provide new insights into ionic liquids April 28th, 2015

Phonons, arise! Small electric voltage alters conductivity in key materials April 22nd, 2015

New class of 3D-printed aerogels improve energy storage April 22nd, 2015

'Holey' graphene for energy storage: Charged holes in graphene increase energy storage capacity April 22nd, 2015

Alliances/Partnerships/Distributorships

How can you see an atom? (video) April 10th, 2015

FibeRio and VF Corporation Form Strategic Partnership to Lead the Apparel and Footwear Markets in Nanofiber Technology April 8th, 2015

UK National Graphene Institute Selects Bruker as Official Partner: World-Leading Graphene Research Facility Purchases Multiple Bruker AFMs April 7th, 2015

NXP and GLOBALFOUNDRIES Announce Production of 40nm Embedded Non-Volatile Memory Technology: Co-developed technology to leverage GLOBALFOUNDRIES 40nm process technology platform March 24th, 2015

Research partnerships

Electron chirp: Cyclotron radiation from single electrons measured directly for first time: Method has potential to measure neutrino mass and look beyond the Standard Model of the universe April 29th, 2015

Weighing -- and imaging -- molecules one at a time April 28th, 2015

SUNY Poly and Sematech Announce Air Products Joins Cutting-Edge CMP Center At Albany Nanotech Complex April 28th, 2015

When mediated by superconductivity, light pushes matter million times more April 28th, 2015

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More










ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project