EPJ Web of Conferences (Sep 2012)

In vessel characterization and first power tests on plasma of the Real-Time controllable EC launcher on FTU Tokamak

  • Nardone A.,
  • Muzzini V.,
  • Minelli D.,
  • Mellera V.,
  • Grosso G.,
  • Granucci G.,
  • Garavaglia S.,
  • Galperti C.,
  • Figini L.,
  • Ferrero R.,
  • Farina D.,
  • Davoudi M.,
  • D’Arcangelo O.,
  • D’Antona G.,
  • Cirant S.,
  • Bruschi A.,
  • Boncagni L.,
  • Bin W.,
  • Artaserse G.,
  • Alessi E.,
  • Moro A.,
  • Nowak S.,
  • Ramogida G.,
  • Simonetto A.,
  • Sozzi C.

DOI
https://doi.org/10.1051/epjconf/20123202018
Journal volume & issue
Vol. 32
p. 02018

Abstract

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The Electron Cyclotron (EC) fast launcher for real time control experiments has been installed on FTU and characterized to be fully integrated in a real-time MHD control module under development. The launcher scheme is based on a two module system, symmetric with respect to the equatorial plane of FTU, with a front steering concept and the launched beams are real-time controllable both in poloidal and toroidal directions. Specific design parameters, defined by the FTU MHD dynamics (typically island size and q profile changes), are the beam dimensions with zooming capabilities, the steering range and mirror speed with the most demanding requirement on poloidal speed of the Steering Mirror (SM) Δθ = 1° in 10 ms. A set of tests has been done to verify the system performance. High power tests of the launcher have been done on a 500 kA, 0.5·1020m−3 and 5.3 T plasma with 2·300 kW of EC power delivered to the plasma. The steering mechanism was tested under the automatic control system and showed a dynamic response in line with the requirements. Results of these tests will be presented in the paper.