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

Observation of odd toroidal Alfvén eigenmodes.

G J Kramer1, S E Sharapov, R Nazikian

  • 1Princeton Plasma Physics Laboratories, PO Box 451, Princeton, New Jersey 08543, USA. gkramer@pppl.gov

Physical Review Letters
|February 3, 2004
PubMed
Summary

Researchers provide experimental evidence for the odd toroidicity induced Alfvén eigenmode (TAE) by observing both odd and even TAEs in Joint European Torus experiments. This finding confirms theoretical predictions of these plasma wave phenomena.

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

Axisymmetric Eigenmodes Excited by Alpha Particle Energy Gradients in JET D-T Plasmas.

Physical review letters·2026
Same author

Highest fusion performance without harmful edge energy bursts in tokamak.

Nature communications·2024
Same author

Evidence of Electron Heating by Alpha Particles in JET Deuterium-Tritium Plasmas.

Physical review letters·2023
Same author

Shifting and Splitting of Resonance Lines due to Dynamical Friction in Plasmas.

Physical review letters·2023
Same author

Improved Particle Confinement with Resonant Magnetic Perturbations in DIII-D Tokamak H-Mode Plasmas.

Physical review letters·2022
Same author

Diagnosing the pedestal magnetic field and magnetohydrodynamics radial structure with pedestal-scrape of layer electron cyclotron emission radiation inversion in H-mode plasma (invited).

The Review of scientific instruments·2022

Area of Science:

  • Plasma Physics
  • Fusion Energy Research
  • Magnetohydrodynamics

Background:

  • Toroidicity Induced Alfvén Eigenmodes (TAEs) are important phenomena in magnetic confinement fusion.
  • Previous research predicted the existence of odd-numbered TAEs, but experimental verification was lacking.
  • Understanding TAEs is crucial for plasma stability and confinement in fusion devices.

Purpose of the Study:

  • To present experimental evidence for the existence of the theoretically predicted odd toroidal Alfvén eigenmode (TAE).
  • To identify and characterize odd TAEs by analyzing their properties in relation to even TAEs.
  • To contribute to the understanding of Alfvén eigenmode behavior in fusion plasmas.

Main Methods:

  • Utilizing the Joint European Torus (JET) tokamak.

Related Experiment Videos

  • Creating low central magnetic shear plasmas using lower hybrid current drive.
  • Generating a fast ion population with ion cyclotron heating.
  • Analyzing the frequency, mode number, and timing of observed modes.

    • Main Results:

    • Simultaneous observation of both odd and even TAEs in a normal shear discharge.
    • Experimental confirmation of the existence of odd TAEs.
    • Identification of odd TAEs based on their distinct characteristics compared to even TAEs.

    Conclusions:

    • The experimental results provide strong evidence for the existence of odd toroidal Alfvén eigenmodes.
    • The findings validate theoretical predictions regarding odd TAEs.
    • This study enhances the comprehension of Alfvén eigenmode dynamics in fusion plasmas.