EPJ Web of Conferences (Jan 2017)

Recent progress on improving ICRF coupling and reducing RF-specific impurities in ASDEX Upgrade

  • Zhang Wei,
  • Bobkov Volodymyr,
  • Noterdaeme Jean-Marie,
  • Tierens Wouter,
  • Aguiam Diogo,
  • Bilato Roberto,
  • Coster David,
  • Colas Laurent,
  • Crombé Kristel,
  • Fuenfgelder Helmut,
  • Faugel Helmut,
  • Feng Yuhe,
  • Jacquot Jonathan,
  • Jacquet Philippe,
  • Kallenbach Arne,
  • Kostic Ana,
  • Lunt Tilmann,
  • Maggiora Riccardo,
  • Ochoukov Roman,
  • Silva Antonio,
  • Suárez Guillermo,
  • Tuccilo Angelo A.,
  • Tudisco Onofrio,
  • Usoltceva Mariia,
  • Van Eester Dirk,
  • Wang Yongsheng,
  • Yang Qingxi,
  • ,

DOI
https://doi.org/10.1051/epjconf/201715702013
Journal volume & issue
Vol. 157
p. 02013

Abstract

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The recent scientific research on ASDEX Upgrade (AUG) has greatly advanced solutions to two issues of Radio Frequency (RF) heating in the Ion Cyclotron Range of Frequencies (ICRF): (a) the coupling of ICRF power to the plasma is significantly improved by density tailoring with local gas puffing; (b) the release of RF-specific impurities is significantly reduced by minimizing the RF near field with 3-strap antennas. This paper summarizes the applied methods and reviews the associated achievements.