EPJ Web of Conferences (Jan 2017)

Major upgrades of the high frequency B-dot probe diagnostic suite on ASDEX Upgrade

  • Ochoukov Roman,
  • Bobkov Volodymyr,
  • Bruhn Cecilia,
  • D’Inca Rodolphe,
  • Faugel Helmut,
  • Fuenfgelder Helmut,
  • McDermott Rachael,
  • Schneider Philip,
  • Suarez-Lopez Guillermo,
  • Noterdaeme Jean-Marie

DOI
https://doi.org/10.1051/epjconf/201715703038
Journal volume & issue
Vol. 157
p. 03038

Abstract

Read online

The high frequency B-dot (HFB) probe diagnostic on the ASDEX Upgrade tokamak has undergone a considerable upgrade during the 2016 opening of the torus. The probe coverage is now greatly expanded toroidally, as well as radially with the addition of probes on the high field side and the removable manipulator head. A new 2-channel fast digitizer now allows to examine and record radio frequency (RF) wave emissions emanating from the plasma in the ion cyclotron range of frequencies (ICRF). Possible studies that can be achieved now include: a study of core ICRF power absorption efficiency; a study of ion cyclotron emissions from the plasma generated by energetic ions; and study of ICRF wave/plasma turbulence interactions in the scrape-off layer region.