caa a22 4500 477124275 CHVBK 20180405111645.0 cr unu---uuuuu 170330e19970801xx s 000 0 eng 10.1007/BF02678306 doi (NATIONALLICENCE)springer-10.1007/BF02678306 A forced gas-cooled single-disk window using silicon nitride composite for high power CW millimeter waves [Elektronische Daten] [T. Shimozuma, S. Morimoto, M. Sato, Y. Takita, S. Ito, S. Kubo, H. Idei, K. Ohkubo, T. Watari] Silicon nitride composite as a candidate of a window material for high power CW (Continuous Wave) millimeter-waves was high power tested especially with a surface cooling by impinging gas nitrogen jets on the single-disk surface. Gas-cooling dramatically suppressed the temperature of the window disk even with gas flow rate of around 100 l/min. With gas cooling of 465l/min., 130kW CW power of HE11 mode could be transmitted through the silicon nitride window with a diameter of 88.9mm. The peak window temperature was completely saturated on 123.6 °C. Without gas-cooling it did not saturate and reached 323 °C during 30 seconds pulse. A possibility of 1MW CW single disk Brewster windows with a forced gas-cooling is discussed, resulting in convinced prospects of the windows with realistic size and thickness. Plenum Publishing Corporation, 1997 gyrotron nationallicence vacuum barrier window nationallicence silicon nitride nationallicence gas-cooling nationallicence electron cyclotron heating nationallicence Shimozuma T. National Institute for Fusion Science, 322-6, Oroshi-cho, Toki-shi, 509-52, Gifu, Japan aut Morimoto S. Kanazawa Institute of Technology, 7-1, Oogigaoka, Nonoichi, 921, Ishikawa, Japan aut Sato M. National Institute for Fusion Science, 322-6, Oroshi-cho, Toki-shi, 509-52, Gifu, Japan aut Takita Y. National Institute for Fusion Science, 322-6, Oroshi-cho, Toki-shi, 509-52, Gifu, Japan aut Ito S. National Institute for Fusion Science, 322-6, Oroshi-cho, Toki-shi, 509-52, Gifu, Japan aut Kubo S. National Institute for Fusion Science, 322-6, Oroshi-cho, Toki-shi, 509-52, Gifu, Japan aut Idei H. National Institute for Fusion Science, 322-6, Oroshi-cho, Toki-shi, 509-52, Gifu, Japan aut Ohkubo K. National Institute for Fusion Science, 322-6, Oroshi-cho, Toki-shi, 509-52, Gifu, Japan aut Watari T. National Institute for Fusion Science, 322-6, Oroshi-cho, Toki-shi, 509-52, Gifu, Japan aut International Journal of Infrared and Millimeter Waves Kluwer Academic Publishers-Plenum Publishers 18/8(1997-08-01), 1479-1493 0195-9271 18:8<1479 1997 18 10762 https://doi.org/10.1007/BF02678306 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02678306 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Shimozuma T. National Institute for Fusion Science, 322-6, Oroshi-cho, Toki-shi, 509-52, Gifu, Japan aut NATIONALLICENCE 700 1- Morimoto S. Kanazawa Institute of Technology, 7-1, Oogigaoka, Nonoichi, 921, Ishikawa, Japan aut NATIONALLICENCE 700 1- Sato M. National Institute for Fusion Science, 322-6, Oroshi-cho, Toki-shi, 509-52, Gifu, Japan aut NATIONALLICENCE 700 1- Takita Y. National Institute for Fusion Science, 322-6, Oroshi-cho, Toki-shi, 509-52, Gifu, Japan aut NATIONALLICENCE 700 1- Ito S. National Institute for Fusion Science, 322-6, Oroshi-cho, Toki-shi, 509-52, Gifu, Japan aut NATIONALLICENCE 700 1- Kubo S. National Institute for Fusion Science, 322-6, Oroshi-cho, Toki-shi, 509-52, Gifu, Japan aut NATIONALLICENCE 700 1- Idei H. National Institute for Fusion Science, 322-6, Oroshi-cho, Toki-shi, 509-52, Gifu, Japan aut NATIONALLICENCE 700 1- Ohkubo K. National Institute for Fusion Science, 322-6, Oroshi-cho, Toki-shi, 509-52, Gifu, Japan aut NATIONALLICENCE 700 1- Watari T. National Institute for Fusion Science, 322-6, Oroshi-cho, Toki-shi, 509-52, Gifu, Japan aut NATIONALLICENCE 773 0- International Journal of Infrared and Millimeter Waves Kluwer Academic Publishers-Plenum Publishers 18/8(1997-08-01), 1479-1493 0195-9271 18:8<1479 1997 18 10762 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 317918699 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer