Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

From current-driven to neoclassically driven tearing modes.

H Reimerdes1, O Sauter, T Goodman

  • 1Centre de Recherches en Physique des Plasmas, Association EURATOM-Confédération Suisse, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland. reimerdes@fusion.gat.com

Physical Review Letters
|March 23, 2002
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Black Hole Spectroscopy and Tests of General Relativity with GW250114.

Physical review letters·2026
Same author

High-resolution visible spectroscopy for ion temperature and flow velocity measurements of the TCV divertor plasma.

The Review of scientific instruments·2025
Same author

GW250114: Testing Hawking's Area Law and the Kerr Nature of Black Holes.

Physical review letters·2025
Same author

Neutral pressure measurement in TCV tokamak using ASDEX-type pressure gauges.

The Review of scientific instruments·2025
Same author

Directional control of neurite outgrowth: emerging technologies for Parkinson's disease using magnetic nanoparticles and magnetic field gradients.

Journal of the Royal Society, Interface·2022
Same author

Search for Subsolar-Mass Binaries in the First Half of Advanced LIGO's and Advanced Virgo's Third Observing Run.

Physical review letters·2022
Same journal

Erratum: Bacterial Turbulence at Compressible Fluid Interfaces [Phys. Rev. Lett. 136, 138301 (2026)].

Physical review letters·2026
Same journal

Unveiling Light-Quark Yukawa Flavor Structure via Dihadron Fragmentation at Lepton Colliders.

Physical review letters·2026
Same journal

Adaptable Route to Fast Coherent State Transport via Bang-Bang-Bang Protocols.

Physical review letters·2026
Same journal

Topological Transition and Emergence of Elasticity of Dislocation in Skyrmion Lattice: Beyond Kittel's Magnetic-Polar Analogy.

Physical review letters·2026
Same journal

Pound-Drever-Hall Method for Superconducting-Qubit Readout.

Physical review letters·2026
Same journal

Coupling a ^{73}Ge Nuclear Spin to an Electrostatically Defined Quantum Dot in Silicon.

Physical review letters·2026
See all related articles

Researchers observed a 2/1 magnetic island in tokamak experiments. Its growth revealed two phases, linking conventional and neoclassical tearing modes to current profiles and bootstrap currents, respectively.

Area of Science:

  • Plasma physics
  • Fusion energy research
  • Magnetohydrodynamics

Background:

  • Magnetic islands are crucial in tokamak operations, influencing plasma confinement.
  • Understanding their destabilization mechanisms is key for future fusion reactors.
  • Previous theories distinguished conventional and neoclassical tearing modes based on driving forces.

Purpose of the Study:

  • To investigate the destabilization mechanisms of the m/n = 2/1 magnetic island in tokamak plasmas.
  • To differentiate and reconcile the roles of conventional and neoclassical tearing modes in island evolution.
  • To provide experimental evidence for the theoretical understanding of tearing mode dynamics.

Main Methods:

  • Experiments were conducted in the TCV tokamak.

Related Experiment Videos

  • Low-density plasma discharges were used.
  • Central electron-cyclotron current drive was applied.
  • The evolution of the magnetic island width was analyzed.

    • Main Results:

    • The m/n = 2/1 magnetic island was observed under specific experimental conditions.
    • Two distinct phases of island width evolution were identified.
    • One phase correlated with a current profile-driven conventional tearing mode.
    • The other phase linked to bootstrap current perturbation-driven neoclassical tearing mode.

    Conclusions:

    • The study provides the first clear experimental observation of a destabilization mechanism reconciling conventional and neoclassical tearing modes.
    • The findings highlight that the primary difference lies in the dominant driving term.
    • This research advances the understanding of magnetic island dynamics in fusion plasmas.