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. Rotation studies in electron Internal Transport Barriers on TCV
 
conference poster not in proceedings

Rotation studies in electron Internal Transport Barriers on TCV

Federspiel, Lucia
•
Duval, Basil  
•
Sauter, Olivier  orcid-logo
Show more
2012
54th Annual Meeting of the APS Division of Plasma Physics

This paper reports simultaneous measurements of intrinsic toroidal and poloidal plasma rotation during the evolution of electron Internal Transport Barriers (eITBs) on TCV. A CXRS diagnostic-beam system provides ion parameter profiles for stationary pre-barrier formation and eITB sustainment phases with a 15mm spatial resolution across the entire barrier width. This special configuration is used to assess the role of Er and E ×B shearing for the eITBs sustainment and formation in TCV. Two eITBs targets were developed either by applying central counter-ECCD with off-axis ECH, giving a central barrier, or off-axis co-ECCD with central ECH/counter-ECCD. The first target, characterized by a central Te barrier, is used to study the evolution of the rotation and Er with respect to the development of MHD modes, ECH power and plasma density. MHD modes cause a toroidal rotation reversal leading to increasingly positive Er. When applying central counter-ECCD, a peaked counter current rotation is sustained in the core with rotation values approximately doubled compared with the ECH phase where both cases have flat Er profiles. This shows experimentally for the first time on TCV that the E ×B shearing does not influence the eITB.

  • Files
  • Details
  • Metrics
Loading...
Thumbnail Image
Name

Federspiel_poster_APS_2012.pdf

Access type

openaccess

Size

1.48 MB

Format

Adobe PDF

Checksum (MD5)

84827bbc0647e478484310a142ea1afe

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