Design status of ITER ECH upper launcher mirrors

The ITER ECH upper launcher is devoted to directing up to 8 2NM beams per port plug over half of the plasma cross section. A focusing mirror is used to achieve a very narrow deposition profile to stabilize MHD activity such as the neoclassical tearing modes (NTMs) and the sawtooth oscillation. The beam deposition location is changed via a steering mirror with up to +/-7 deg (+/-14 deg beam), which allows access from inside mid radius out to nearly the plasma edge. The steering mechanism uses a frictionless backlash free system to avoid sticking, thus increasing the reliability.


Published in:
22Nd Ieee/Npss Symposium On Fusion Engineering, 303-306
Presented at:
22nd IEEE/NPSS Symposium on Fusion Engineering, Albuquerque, NM, Jun 17-21, 2007
Year:
2007
Publisher:
Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa
ISBN:
978-1-4244-1193-1
Laboratories:
SPC
CRPP




 Record created 2012-07-04, last modified 2018-01-28


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