Effects of coupling and asymmetries on load resilience of ITER-like structures
A generally recognized weakness of IC antennas is their sensitivity to load variations. These, in particular if of fast time scale (ELMs) may constitute a significant source inefficiency in power transfer, because of the induced impedance mismatch, which ultimately can cause a power trip for generator protection. ITER-like structures (ILS) 1) feature an intrinsic resilience to load variations, related to the symmetry of the currents in the two branches. It has been suggested 2) that the effects of coupling between the array elements would significantly impair the load resilience of the structure. In this paper the effect of inter strap coupling and of however induced electrical array asymmetries on load resilience are quantitatively examined and the results are applied to the ITER array. It is shown that in an ILS load resilience (and other sources of electrical asymmetry) are fully compatible with perfect match for any level of coupling and that the number of matching elements varies from two to four depending on the asymmetry level of the array.
Bibliographic Reference: An oral paper given at: Sixteenth Topical Conference on Radio Frequency Power in Plasmas Organised by: Plasma Science & Fusion Center, Cambridge (US) Held at: Park City, Utah USA
Availability: Available from Association EURATOM-CEA, Departement de Recherches sur la Fusion Controlee, CEA Cadarache, F-13108 St Paul-Lez-Durance, France Tel: (+33) 4 42 25 70 01; Fax: (+33) 4 42 25 64 21 E-mail: email@example.com
Record Number: 200518128 / Last updated on: 2005-05-20
Original language: en
Available languages: en