Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Conferences, Workshops, Symposiums, and Seminars
  4. A Drift-Kinetic Model for Tokamak SOL Plasmas
 
conference poster not in proceedings

A Drift-Kinetic Model for Tokamak SOL Plasmas

Jorge, Rogério  
•
Ricci, Paolo
•
Loureiro, Nuno
2016
21st Joint EU-US Transport Task Force Meeting

A fluid drift-reduced description, which accurately describes phenomena occurring on time scales slower than the characteristic gyro-frequencies and space scales longer than the Larmor radii, has been successfully used in recent years to model the dynamics of tokamak scrape-off layer (SOL). This region controls the tokamak power and particle exhaust and plays an important role in de- termining the overall plasma confinement of this device, an issue of utmost importance in the fusion program. The fluid model assumed in the drift-reduced plasma description relies on the typical length scales being longer than the characteristic mean free path. This is not true in general, particu- larly during edge-localised modes in H-mode plasmas. The goal of the present work is to introduce a drift-kinetic model for SOL plasmas that overcomes the limitations of fluid models. As in the SOL the magnitude of equilibrium and perturbation fields may be of the same order, a full-f model is employed with the full Coulomb collision operator. The Coulomb moment expansion is used in order to relax the fluid approximation and pro- pose a general moment hierarchy. A separation between parallel and perpendicular moments is per- formed, allowing the inclusion of kinetic effects in the parallel dynamics, even in the presence of fi- nite collisionality. The resulting model is analysed in the fluid and kinetic limits, comparing with known models, such as the drift-reduced Braginskii equations.

  • Files
  • Details
  • Metrics
Type
conference poster not in proceedings
Author(s)
Jorge, Rogério  
Ricci, Paolo
Loureiro, Nuno
Date Issued

2016

Subjects

CRPP_EDGE

Written at

OTHER

EPFL units
SPC  
Event nameEvent placeEvent date
21st Joint EU-US Transport Task Force Meeting

Leysin, Switzerland

September 5-8, 2016

Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/129190
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés