caa a22 4500 477124240 CHVBK 20180405111645.0 cr unu---uuuuu 170330e19970801xx s 000 0 eng 10.1007/BF02678305 doi (NATIONALLICENCE)springer-10.1007/BF02678305 D-band frequency step-tuning of A 1 MW gyrotron using a brewster output window [Elektronische Daten] [O. Braz, G. Dammertz, M. Kuntze, M. Thumm] In order to demonstrate the usability of gyrotron oscillators as frequency step tunable high power millimeter-wave sources, experiments on a 1 MW, 140 GHz TE22,6 gyrotron with a built-in quasi-optical (q. o.) mode converter have been performed. By varying the operating parameters of the tube, a series of oscillations in the frequency range from 114 GHz to 166 GHz were excited. To avoid reflections, caused by the required vacuum barrier window, the gyrotron was equipped with a Brewster window. The achieved output power levels between 0.85 and 1.05 MW are compared to measurements carried out with the same tube using a conventional single-disk window. These experiments showed that even by using a q. o. mode converter, the influence of window reflections on the gyrotron oscillatory behavior cannot be removed completely. Plenum Publishing Corporation, 1997 Gyrotron nationallicence Brewster window nationallicence single disk window nationallicence frequency step-tuning nationallicence Braz O. Forschungszentrum Karlsruhe (FZK), ITP Association EURATOM-FZK, Postfach 3640, D-76021, Karlsruhe, Germany aut Dammertz G. Forschungszentrum Karlsruhe (FZK), ITP Association EURATOM-FZK, Postfach 3640, D-76021, Karlsruhe, Germany aut Kuntze M. Forschungszentrum Karlsruhe (FZK), ITP Association EURATOM-FZK, Postfach 3640, D-76021, Karlsruhe, Germany aut Thumm M. Forschungszentrum Karlsruhe (FZK), ITP Association EURATOM-FZK, Postfach 3640, D-76021, Karlsruhe, Germany aut International Journal of Infrared and Millimeter Waves Kluwer Academic Publishers-Plenum Publishers 18/8(1997-08-01), 1465-1477 0195-9271 18:8<1465 1997 18 10762 https://doi.org/10.1007/BF02678305 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02678305 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Braz O. Forschungszentrum Karlsruhe (FZK), ITP Association EURATOM-FZK, Postfach 3640, D-76021, Karlsruhe, Germany aut NATIONALLICENCE 700 1- Dammertz G. Forschungszentrum Karlsruhe (FZK), ITP Association EURATOM-FZK, Postfach 3640, D-76021, Karlsruhe, Germany aut NATIONALLICENCE 700 1- Kuntze M. Forschungszentrum Karlsruhe (FZK), ITP Association EURATOM-FZK, Postfach 3640, D-76021, Karlsruhe, Germany aut NATIONALLICENCE 700 1- Thumm M. Forschungszentrum Karlsruhe (FZK), ITP Association EURATOM-FZK, Postfach 3640, D-76021, Karlsruhe, Germany aut NATIONALLICENCE 773 0- International Journal of Infrared and Millimeter Waves Kluwer Academic Publishers-Plenum Publishers 18/8(1997-08-01), 1465-1477 0195-9271 18:8<1465 1997 18 10762 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer