High-power microwave diplexers for advanced ECRH systems (Contributo in atti di convegno)

Type
Label
  • High-power microwave diplexers for advanced ECRH systems (Contributo in atti di convegno) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Alternative label
  • Kasparek W., Petelin M., Shchegolkov D., Erckmann V., Bruschi A., Braune H., Hollmann F., Jonitz L., Michel G., Laqua H.P., Noke F., Purps F., Brand P., Plaum B., Wubie W., Koshurinov Y., Lubyako L., Bin W., D'Arcangelo O. (2008)
    High-power microwave diplexers for advanced ECRH systems
    in VII International Workshop on Strong Microwaves: Sources and Applications, Nizhny Novgorod
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Kasparek W., Petelin M., Shchegolkov D., Erckmann V., Bruschi A., Braune H., Hollmann F., Jonitz L., Michel G., Laqua H.P., Noke F., Purps F., Brand P., Plaum B., Wubie W., Koshurinov Y., Lubyako L., Bin W., D'Arcangelo O. (literal)
Pagina inizio
  • 27 (literal)
Pagina fine
  • 39 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#titoloVolume
  • Strong Microwaves: Sources and Applications (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1 Institut für Plasmaforschung, Universität Stuttgart, D-70569 Stuttgart, Germany 2 Institute of Applied Physics, RAS, 603950 Nizhny Novgorod, Russia 3 Max-Planck-Institut für Plasmaphysik (IPP), EURATOM-Ass., D-17491 Greifswald, Germany 4 Istituto di Fisica del Plasma, EURATOM-ENEA-CNR Ass., via R. Cozzi 53, 20125 Milano, Italy 5 Forschungszentrum Karlsruhe, Association EURATOM-FZK, IHM, D-76021 Karlsruhe, GermanyIFP-CNR Milano, Italy (literal)
Titolo
  • High-power microwave diplexers for advanced ECRH systems (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#isbn
  • 978-5-8048-0083-4 (literal)
Abstract
  • Combination of the power of two (or more) gyrotrons is an attractive feature for large ECRH systems, e.g. for ITER. Fast switching of the power from continuously operating gyrotrons between two antennas synchronous to the rotation of the magnetic islands in tokamaks maximizes the efficiency for stabilization of neoclassical tearing modes. Both tasks can be fulfilled with a high-power four-port diplexer, utilizing small frequency differences or small frequency-shift keying (some tens of MHz, by modulation of a supply voltage) of the gyrotrons. In the paper, high-power diplexer designs for quasi-optical and corrugated waveguide transmission systems including numerical and experimental results are discussed. In more detail, the principle and the design of a quasi-optical resonator diplexer is presented. Low-power measurements at 140 GHz of switching contrast, mode purity and efficiency are shown to agree well with theory. Results from high-power experiments on fast switching and power combination of two gyrotrons using the ECRH system for the stellarator W7-X are presented. Near-term plans for high-power experiments at ASDEX Upgrade and FTU are described (Note that there are also plans for in-line ECE on ASDEX Upgrade). Finally, applications of diplexers for the ECRH system on ITER assuming conventional gyrotrons are discussed, and future possibilities offered by phase-controlled gyrotrons like multibeam combining and switching are highlighted. (literal)
Prodotto di
Autore CNR

Incoming links:


Prodotto
Autore CNR di
data.CNR.it