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Topic: Magnetic fusion energy


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  Magnetic fusion energy - Wikipedia, the free encyclopedia
Magnetic Fusion Energy (MFE) is a sustained nuclear fusion reaction in a plasma that is contained by magnetic fields.
For example, scientists can now exercise a measure of control over plasma turbulence and resultant energy leakage, long considered an unavoidable and intractable feature of plasmas; the plasma pressure above which the plasma disassembles can now be made large enough to sustain a fusion reaction rate acceptable for a power plant.
Electromagnetic waves can be injected and steered to manipulate the paths of plasma particles and then to produce the large electrical currents necessary to produce the magnetic fields to confine the plasma.
en.wikipedia.org /wiki/Magnetic_fusion_energy   (281 words)

  
 Magnetic mirror - Wikipedia, the free encyclopedia
It is true that the minimum volume and magnetic energy is larger for the case of fast particles and weak fields, but the mirror ratio required remains the same.
In the sixties and seventies, machines using magnetic mirror confinement were considered a viable candidate for producing fusion energy.
Magnetic mirrors play an important role in other types of magnetic fusion energy devices such as tokamaks, where the toroidal magnetic field is stronger on the inboard side than on the outboard side.
en.wikipedia.org /wiki/Magnetic_mirror   (400 words)

  
 CRS Report: - - NLE
Fusion (http://wwwofe.er.doe.gov/) is the fundamental mechanism in the universe for producing energy.
Fusion occurs when the nuclei (or core) of light atoms, such as isotopes (or forms) of the element hydrogen (deuterium and tritium), collide with sufficient energy to overcome the natural repulsive forces that exist between such nuclei.
Fusion reactions are possible between a number of light atoms, including deuterium alone (a D-D reaction); deuterium and helium-3, an isotope of the element helium (a D- He reaction); and hydrogen and the element lithium, a light metal.
www.cnie.org /nle/crsreports/energy/eng-22.cfm   (7346 words)

  
 Fusion Energy Sciences Fellowship: Introduction   (Site not responding. Last check: 2007-10-19)
Study and research under the fellowship are to be conducted in the area of fusion energy sciences and technology related to the development of fusion energy.
In the former, carefully engineered magnetic fields isolate the plasma from the walls of the surrounding vacuum chamber; while in the latter, a pellet of fusion fuel is compressed and heated so quickly that there is no time for the heat to escape.
There has been great progress in plasma science during the past three decades, in both magnetic and inertial confinement, and today the world is at the threshold of a major advance in fusion energy development—the study of burning plasmas, in which the self-heating from fusion reactions dominates the plasma behavior.
www.orau.gov /orise/edu/DOE/FES/fesfelintro.htm   (1469 words)

  
 Simulating turbulence in magnetic fusion plasmas
Magnetic fusion uses intense magnetic fields to confine an extremely hot gas of electrons and positively charged ions called a plasma.
The fluctuations are caused by gradients of density and temperature.
In the tokamak, the stable magnetic bottle is generated both by a series of external coils, which are wrapped around the outside of the doughnut, and by a strong electrical current, up to several million amperes, that is induced in the plasma itself.
www.eurekalert.org /features/doe/2002-01/dlnl-sti062402.php   (3075 words)

  
 [No title]
International cooperation; examination of impact on national magnetic fusion program; exploration of prospects for joint funding in construction of fusion engineering device; report to Congressional committees on results of examination and exploration.
Program activities -STATUTE- (a) Development in areas where lack of knowledge limits magnetic fusion energy systems The Secretary shall initiate activities or accelerate existing activities in research areas in which the lack of knowledge limits magnetic fusion energy systems in order to ensure the achievement of the purposes of this chapter.
Magnetic fusion engineering center -STATUTE- (a) Development plan The Secretary shall develop a plan for the creation of a national magnetic fusion engineering center for the purpose of accelerating fusion technology development via the concentration and coordination of major magnetic fusion engineering devices and associated activities at such a national center.
uscode.house.gov /download/pls/42C101.txt   (1489 words)

  
 Fusion Energy Policy Statement
For a given mass of fuel, the energy released from fusion substantially exceeds the energy released from fission (the neutron-induced splitting of heavy elements such as uranium) and far exceeds (by millions of times) the energy released in chemical reactions (e.g., the burning of coal, gas or oil).
In magnetic fusion, a hot (over 100 million degrees Celsius) plasma is confined by strong magnetic fields and heated by external sources until the fusion reaction becomes self-sustaining.
In inertial fusion, small fuel pellets are bombarded by intense laser or particle beams to produce an ignited, dense plasma, held by inertia for brief energy-producing pulses.
fed.ans.org /policy97.html   (1536 words)

  
 Heavy-Ion Fusion Tutorial
For fusion to occur, the atoms of hydrogen must be heated to extremely high temperatures (millions of degrees C) so they have enough thermal energy to overcome this repulsion, and then they must be held together or confined long enough for fusion to occur.
Most of the MFE effort is currently being spent on the tokamak approach, in which the reactor is doughnut shaped and surrounded by strong magnets.
The energy released by the fuel (mainly in the form of high energy neutrons and x-rays) will be absorbed by a special fluid blanket whose heat is eventually transferred to a relatively conventional steam generator, where it is converted into electricity.
hif.lbl.gov /tutorial/tutorial.html   (2553 words)

  
 Strategic Simulation Initiative for Fusion Energy Sciences
Alternatives to the tokamak based on inertial or magnetic confinement principles will especially benefit from advanced simulations, since it will be impossible to fully test experimentally all approaches to fusion energy which show initial theoretical promise.
The objective of this integrated modeling activity is to greatly expand the present 2D models that predicts all the surface-averaged device-scale behavior of the plasma in toroidal magnetic fusion devices on the time-scale that the bulk profiles change.
In both cases the energy source or sink interacts with the underlying fluid dynamics to produce laminar flows and "flame fronts"—sharp layers dominated by a particular atomic or molecular process—or instabilities and turbulence.
www.lehigh.edu /ahk3/Desktop/ahk3/public/www-data/afmods.html   (4421 words)

  
 91039: Magnetic Fusion: The DOE Fusion Energy Sciences Program
One path to this goal, called magnetic fusion energy (MFE), is to use very strong magnetic fields to confine a deuterium and tritium plasma while heating it to fusion temperatures.
Fusion is the fundamental mechanism in the universe for producing energy.
Fusion reactions are possible between a number of light atoms, including deuterium alone (a D-D reaction); deuterium and helium-3, an isotope of the element helium (a D3He reaction); and hydrogen and the element lithium, a light metal.
www.fas.org /spp/starwars/crs/91-039.htm   (7692 words)

  
 3B: Magnetic Fusion, High Energy Density Hydrodynamics and Vacuum Microelectronics
Magnetized Target Fusion (MTF) is a generalized scheme for attaining burning plasma conditions by feeding power into a dense plasma by means of a fast liner implosion, at a rate faster than thermal transport diffuses it to the walls.
The magnetic field is critical to inhibit these thermal losses, but it is neither intended nor needed to provide steady plasma confinement.
The issues we are attempting to elucidate with 2-D MHD calculations are the convective stability of the plasma-wall interface, wall heating and migration of cold wall material into the hot, dense plasma, and ultimately the state of the full plasma system after a radial compression ratio of 10:1.
www.ee.ualberta.ca /icops2002/programtest/3B.htm   (2258 words)

  
 NERSC 2001 Annual Report: Science Highlights: Fusion Energy Sciences
The adjacent regions of positive and negative polarity of the electric field are the signature of double layers, which are localized regions of intense electric field which scatter and heat electrons.
Such layers are expected to be a prolific source of energetic electrons during magnetic reconnection in fusion and astrophysical plasmas.
The release of magnetic energy during magnetic reconnection in nature and also in some laboratory experiments (sawteeth in tokamaks) is typically much faster than can be explained by resistive MHD models.
www.nersc.gov /news/annual_reports/annrep01/sh_FES_03.html   (579 words)

  
 Magnetic fusion : Sources of energy   (Site not responding. Last check: 2007-10-19)
The 21st century will be a century for high energy requirements, both from a quantity (at least double) as a quality point of view (wider access to "commercial" energy).
In this context of limited energy resources and growing environmental constraints new energy scenarios must be put into operation.
the second is based on the simultaneous use of a whole range of energy sources (solar energy, wind power and hydraulics) gradually and partially replacing fossil fuels.
www-fusion-magnetique.cea.fr /gb/energies/energie01.htm   (386 words)

  
 Plasma Science and Technology - Applications - Magnetic Confinement Fusion
Magnetic confinement fusion devices are designed to confine hot, dense plasma for a sufficient period of time (a few seconds) for nuclei to fuse by overcoming their natural repulsive forces.
An operating fusion energy reactor must attain sufficiently high energy density for the fusion to become self-sustaining (ignition) and generate economically significant energy gains.
Fusion is routinely produced in current experiments and we are now on the threshold of "burning plasma" experiments that will allow the construction of useful fusion powers plants.
www.plasmas.org /fusion-mag.htm   (1860 words)

  
 Sandia National Laboratories - News Releases
Wilson has been studying the interaction of materials with magnetic fusion plasmas - hot, ionized gases - since arriving at Sandia in 1974 with a Ph.D. in material science from Cornell University.
Magnetic fusion creates energy by fusing light nuclei into heavier atoms in a process similar to the reaction that powers the sun.
Sandia is a multiprogram Department of Energy laboratory, operated by a subsidiary of Lockheed Martin Corp. With main facilities in Albuquerque, N.M., and Livermore, Calif., Sandia has major research and development responsibilities in national defense, energy, environmental technologies and economic competitiveness.
www.sandia.gov /media/award.htm   (368 words)

  
 Magnetic Fusion
Sandia's Fusion Energy Sciences Program is developing a technology base for the design of in-vessel components that will perform satisfactorily in fusion plasma environments.
We are developing the diagnostics to measure heat flux on a flowing liquid and the effect of extremely intense, short-duration heat pulses on a liquid surface.
Because of the increased focus in US fusion energy sciences on more compact, alternative concepts to the conventional tokamak, the issues of plasma/material interactions will be of greater importance in the future.
www.sandia.gov /eesector/besmfe.html   (529 words)

  
 Fusion Energy Advisory Committee Letter to Martha Krebs
Last month, the Fusion Energy Advisory Committee (FEAC) issued its report, "A Restructured Fusion Energy Sciences Program." During a two-day meeting in Washington, FEAC briefed Dr. Martha Krebs, Director of DOE's Office of Energy Research, about the report's findings and conclusions (see FYIs #13-16.) A transmittal letter accompanies the submission of this report to DOE.
In response to their charge, they recommended a $320 M figure as a minimum annual funding level for a viable fusion energy program.
It is important to recognize that the ITER EDA is the single most important mechanism for American industry to participate in fusion development." "...as the nation's program-dedicated laboratory for fusion science, the PPPL must provide the leadership necessary for the restructured national Fusion Energy Sciences Program to succeed.
www.aip.org /fyi/1996/fyi96.025.htm   (340 words)

  
 [No title]
A primary focus of the meeting was to review three proposed magnetic fusion burning plasma experiments (Ignitor, FIRE and ITER) and to review progress and plans in the area of inertial fusion energy.
The study of burning plasmas, in which self-heating from fusion reactions dominates plasma behavior, is at the frontier of magnetic fusion energy science.
The next major step in magnetic fusion research should be a burning plasma program, which is essential to the science focus and energy goal of fusion research.
aries.ucsd.edu /FPA/ARC02/fpn02-48.shtml   (850 words)

  
 Los Alamos Fusion Energy Sciences
In addition to this fusion physics work, Los Alamos is contributing fusion energy science with a variety of supporting fusion technology topics, notably tritium technology and inertial fusion target fabrication.
The Los Alamos fusion program is closely integrated with related work throughout the US and elsewhere in the world.
Fusion energy sciences research is managed at LANL by the Fusion Energy Sciences Office as part of the Office of Science.
fusionenergy.lanl.gov   (363 words)

  
 Snowmass 2002 Fusion Energy Sciences Summer Study   (Site not responding. Last check: 2007-10-19)
The 2002 Fusion Energy Sciences Summer Study will be a forum for the critical assessment of major next-steps in the fusion energy sciences program, and will provide crucial community input to the long-range planning activities undertaken by the DOE and the FESAC.
It will be an ideal place for a broad community of scientists to examine goals and proposed initiatives in burning plasma science in magnetic fusion energy and integrated research experiments in inertial fusion energy.
This meeting is open to every member of the fusion energy science community and significant international participation is encouraged.
fusion.gat.com /snowmass   (344 words)

  
 Magnetic Fusion Energy Program at LLNL
In our magnetic fusion research, we focus on high-leverage critical areas in physics and technology that will make fusion power plants commercially attractive and publicly accepted in the twenty-first century.
In our Sustained Spheromak Physics Experiment (SSPX), we are working on the spheromak, a toroidal fusion concept that eliminates most of the magnetic coils required for a tokamak in favor of internal-dynamo-driven magnetic fields.
Much national and international research into magnetic fusion energy focuses on the tokamak, a doughnut-shaped confinement device.
www.mfescience.org   (322 words)

  
 [No title]
The magnetic fusion energy sciences community and OFES must recognize the measurement as necessary for advancing the magnetic fusion energy sciences program.
It is expected that funds provided to the [[Page 20443]] magnetic fusion experiments should be used to implement routine diagnostics, based on their own research program priorities.
For more general information on the fusion energy sciences program, see the OFES Web site at http://www.ofes.science.doe.gov. Funding Information: Approximately $2,200,000 of Fiscal Year 2002, funding will be available for awards resulting from this Notice.
www.tgci.com /fedrgtxt/01-9945.txt   (1275 words)

  
 International Fusion Energy Act of 1993
The Department's magnetic fusion research focuses on the use of strong magnetic fields to confine an extremely hot gas which undergoes fusion and produces heat.
The purpose of ITER is to demonstrate the scientific and technical feasibility of magnetic fusion energy and to prove that a sustained fusion reaction can be maintained at an energy level sufficient to generate electricity in commercial quantities.
The Department's magnetic fusion program shall be referred to as the ITER program and shall be carried out in cooperation with the international community.
fire.pppl.gov /us_s646_fusion_act_1993.html   (2680 words)

  
 Untitled
to strive for about 25% of the fusion budget to be directed to alternative approaches to fusion energy.
Fusion is the only indigenous energy source that will last as long as the earth lasts.
fusion, both for the advanced tokamak and, in particular, for alternative approaches.
www.house.gov /science/l_john_perkins.htm   (1627 words)

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