Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
On Current Drive and Wave Induced Bootstrap Current in Toroidal Plasmas
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.ORCID iD: 0000-0002-7142-7103
2008 (English)In: Theory of Fusion Plasmas: Joint Varenna - Lausanne International Workshop, Melville, New York, USA: AMER INST PHYSICS , 2008, 88-99 p.Conference paper, Published paper (Other academic)
Abstract [en]

A comprehensive treatment of wave-particle interactions in toroidal plasmas including collisional relaxation. applicable to heating or anomalous wave induced transport, has been obtained by using Monte Carlo operators satisfying quasi-neutrality. This approach enables a self-consistent treatment of wave-particle interactions applicable to the banana regime in the neoclassical theory. It allows an extension into a regime with large temperature and density gradients, losses and transport of particles by wave-particle interactions making the method applicable to transport barriers. It is found that at large gradients the relationship between radial electric field, parallel velocity, temperature and density gradient in the neoclassical theory is modified such that coefficient in front of the logarithmic ion temperature gradient, which in the standard neoclassical theory is small and counteracts the electric field caused by the density gradient, now changes sign and contributes to the built up of the radial electric field. The Possibility to drive current by absorbing the waves on trapped particles has been studied and flow the wave-particle interactions affect the bootstrap current. Two new current drive mechanisms are studied: current drive by wave induced bootstrap current and selective detrapping into passing orbits by directed waves.

Place, publisher, year, edition, pages
Melville, New York, USA: AMER INST PHYSICS , 2008. 88-99 p.
Series
AIP Conference Proceedings, ISSN 0094-243X ; 1069
Keyword [en]
Current drive, Monte Carlo Operators, Neoclassical theory
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:kth:diva-86057ISI: 000262074400008Scopus ID: 2-s2.0-84998979467ISBN: 978-0-7354-0600-1 (print)OAI: oai:DiVA.org:kth-86057DiVA: diva2:500386
Conference
Theory of Fusion Plasmas,Joint Varenna - Lausanne International Workshop, Varenna, Italy 2008
Note
QC 20120215Available from: 2012-02-13 Created: 2012-02-13 Last updated: 2012-02-23Bibliographically approved

Open Access in DiVA

No full text

Scopus

Authority records BETA

Johnson, Thomas

Search in DiVA

By author/editor
Hellsten, TorbjörnJohnson, Thomas
By organisation
Fusion Plasma Physics
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 31 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf