Solution to fusion hurdle demonstrated

A solution to the problem of plasma instabilities that could threaten the commercial viability of fusion power is demonstrated by Todd Evans and colleagues in the June issue of Nature Physics.

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************************NATURE PHYSICS********************
(http://www.nature.com/naturephysics)

[1] Solution to fusion hurdle demonstrated
DOI: 10.1038/nphys312

A solution to the problem of plasma instabilities that could threaten the commercial viability of fusion power is demonstrated by Todd Evans and colleagues in the June issue of Nature Physics. The work improves the chances for the success of ITER, the international experimental fusion reactor, which will be the next step towards harnessing the process that powers the sun as a clean, renewable source of energy.

ITER will work by heating a hydrogen plasma to more than 100 million degrees celsius — which causes the ions to fuse and release energy — while using a combination of magnetic fields to confine it within a doughnut-shaped chamber. It is feared that plasma instabilities, which cause lightning-like discharges of high-energy ions and eat away the inner walls of smaller fusion devices, could severely limit ITER's operation. But by weakly perturbing the magnetic field that confines the plasma in a way that causes the field lines at the edge to become chaotic, the authors show that these instabilities can be completely eliminated.

As well as improving the outlook for ITER — whose construction is due to begin later this year — the elimination of the wall-eroding instabilities will enable researchers to tackle other challenges that will face ITER's operation ahead of its scheduled completion in ten years time.

Author contact:
Todd E. Evans (General Atomics, San Diego, California 92186-5608, USA)
Tel: +1 858 455 4269, Email: [email protected]

Other papers from Nature Physics to be published online at the same time and with the same embargo:

[2] Atomic excitation during recollision-free ultrafast multi-electron tunnel ionization
DOI: 10.1038/nphys310

[3] The loss of vortex line tension sets an upper limit to the irreversibility line in YBa2Cu3O7
DOI: 10.1038/nphys311

[4] Stimulated Brillouin scattering from multi-GHz-guided acoustic phonons in nanostructured photonic crystal fibres
DOI: 10.1038/nphys315

[5] Distinct spinon and holon dispersions in photoemission spectral functions from one-dimensional SrCuO2
DOI: 10.1038/nphys316

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Items from other Nature journals to be published online at the same time and with the same embargo:
Nature (http://www.nature.com/nature)

[6] Structural basis for gene regulation by a thiamine pyrophosphate-sensing riboswitch
DOI: 10.1038/nature04740

[7] ING2 PHD domain links histone H3 lysine 4 methylation to active gene repression
DOI: 10.1038/nature04815

[8] Molecular basis for site-specific read-out of histone H3K4me3 by the BPTF PHD finger of NURF
DOI: 10.1038/nature04802

[9] Molecular mechanism of histone H3K4me3 recognition by plant homeodomain of ING2
DOI: 10.1038/nature04814

[10] A PHD finger of NURF couples histone H3 lysine 4 trimethylation with chromatin remodelling
DOI: 10.1038/nature04815

NATURE MATERIALS (http://www.nature.com/naturematerials)

[11] Complex precipitation pathways in multicomponent alloys
DOI: 10.1038/nmat1652

[12] Reversible active switching of the mechanical properties of a peptide film at a fluid-fluid interface
DOI: 10.1038/nmat1653

[13] Xenon as a probe for minority sites on solid surfaces
DOI: 10.1038/nmat1654

[14] Robust free-standing nanomembranes of organic/inorganic interpenetrating networks
DOI: 10.1038/nmat1655

Nature MEDICINE (http://www.nature.com/naturemedicine)

[15] Generation of C5a in the absence of C3: a new complement activation pathway
DOI: 10.1038/nm1419

[16] CB1 cannabinoid receptor antagonism: a new strategy for the treatment of liver fibrosis
DOI: 10.1038/nm1421

[17] Synaptic scaffolding protein Homer1a protects against chronic inflammatory pain
DOI: 10.1038/nm1406

[18] Oral CD3-specific antibody suppresses autoimmune encephalomyelitis by inducing CD4+CD25–LAP+ T cells
DOI: 10.1038/nm1408

[19] Intravenous immunoglobulin ameliorates ITP via activating Fcg receptors on dendritic cells
DOI: 10.1038/nm1416

[20] Osteoclasts degrade endosteal components and promote mobilization of hematopoietic progenitor cells
DOI: 10.1038/nm1417

Nature BIOTECHNOLOGY (http://www.nature.com/naturebiotechnolgy)

[21] Dual selection enhances the signaling specificity of a variant of the quorum-sensing transcriptional activator LuxR
DOI: 10.1038/nbt1209

NATURE GENETICS (http://www.nature.com/naturegenetics)

[22] Mutations in GLIS3 are responsible for a rare syndrome with neonatal diabetes mellitus and congenital hypothyroidism
DOI: 10.1038/ng1802

[23] Noise in protein expression scales with natural protein abundance
DOI: 10.1038/ng1807

[24] Evaluating coverage of genome-wide association studies
DOI: 10.1038/ng1801

[25] Evaluating and improving power in whole-genome association studies using fixed marker sets
DOI: 10.1038/ng1816

Nature NEUROSCIENCE (http://www.nature.com/natureneuroscience)

[26] Ascl1 and Gsh1/2 control inhibitory and excitatory cell fate in spinal sensory interneurons
DOI: 10.1038/nn1706

[27] Midline radial glia translocation and corpus callosum formation require FGF signaling
DOI: 10.1038/nn1705

[28] Impaired light masking in dopamine D2 receptor–null mice
DOI: 10.1038/nn1711

[29] Adaptation of gender derived from biological motion
DOI: 10.1038/nn1710

Nature IMMUNOLOGY (http://www.nature.com/natureimmunology)

[30] Interleukin 15–dependent crosstalk between conventional and plasmacytoid dendritic cells essential for CpG-induced immune activation
DOI: 10.1038/ni1348

[31] Neutrophil direction sensing and superoxide production linked by the GTPase-activating protein GIT2
DOI: 10.1038/ni1349

NATURE CELL BIOLOGY (http://www.nature.com/naturecellbiology)

[32] Molecular architecture of a kinetochore–microtubule attachment site
DOI: 10.1038/ncb1414

[33] Processive bidirectional motion of dynein–dynactin complexes in vitro
DOI: 10.1038/ncb1421

[34] p63 regulates an adhesion program and cell survival in epithelial cells
DOI: 10.1038/ncb1420

[35] Plexin-A1 and its interaction with DAP12 in immune responses and bone homeostasis
DOI: 10.1038/ncb1416

Nature STRUCTURAL & MOLECULAR BIOLOGY (http://www.nature.com/natstructmolbiol)

[36] Importin-alpha-16 is a translocon-associated protein involved in sorting membrane proteins to the nuclear envelope
DOI: 10.1038/nsmb1098

[37] X-ray structure of influenza virus NS1 effector domain
DOI: 10.1038/nsmb1099

[38] PUF proteins bind Pop2p to regulate messenger RNAs
DOI: 10.1038/nsmb1100

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GEOGRAPHICAL LISTING OF AUTHORS

The following list of places refers to the whereabouts of authors on the papers numbered in this release. The listing may be for an author's main affiliation, or for a place where they are working temporarily. Please see the PDF of the paper for full details.

AUSTRALIA
Queensland 12

AUSTRIA
Vienna 17

BELGIUM
Brussels 16

BRAZIL
Campinas 4

CANADA
Ottowa 19
Quebec City 7
Toronto 19

FRANCE
Besancon Cedex 4
Creteil 16
Evry 22
Gif-sur-Yvette 11
Paris 22
Saint Etienne du Rouvray 11
St Martin d’Heres 11
St Paul Lez Durance 1
Strasbourg 28
Villeurbanne11

GERMANY
Erlangen 4
Hannover 26
Heidelberg 17
Ulm 15

ISRAEL
Haifa 18
Rehovot 20, 23
Tel Aviv 3

JAPAN
Akita 30
Higashi 35
Kobe 28, 31
Kyoto 31
Oita 31
Osaka 31, 35
Saitama 5
Sendai 5, 35
Tokyo 5
Wakayama 35
Wako 14

KOREA
Seoul 5

NEW ZEALAND
Auckland 17

SAUDI ARABIA
Jeddah 22

SPAIN
Barcelona 3

SWITZERLAND
Zurich 17

UNITED KINGDOM
Bath 4
Belfast 2
Cambridge 2, 23
Didcot 2
Edgbaston 10
London 2
Oxford 24
Southampton 2

UNITED STATES OF AMERICA
California
Berkeley 5
Irvine 28
La Jolla 26, 29
Livermore 1
Palo Alto 7
Pasadena 21
Riverside 13
San Diego 1
Stanford 5, 7, 9
Colorado
Aurora 7, 9
Massachusetts
Boston 7, 18, 23, 25, 26, 34
Cambridge 23, 25
Utah
Salt Lake City 7
New Mexico
Albuquerque 1
Illinois
Argonne 3
Michigan
Ann Arbor 15
Kalamazoo 3
New York
Bronx 9
Cold Spring Harbor 34
New York 6, 8, 10, 34
Connecticut
New Haven 6, 27
Maryland
Bethesda 10
Pennsylvania
Philadelpia 15, 33
University Park 22
Texas
College Station 36
Houston 15, 37
North Carolina
Chapel Hill 32
Wisconsin
Madison 38

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Published: 21 May 2006

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