Author/Authors :
Kasugai، نويسنده , , Anatoly A. and Sakamoto، نويسنده , , K. and Tsuneoka، نويسنده , , M. and Maebara، نويسنده , , S. and Nagashima، نويسنده , , T. and Imai، نويسنده , , T. and Kariya، نويسنده , , T. and Okazaki، نويسنده , , Y. and Shirai، نويسنده , , Azusa N. and Okamoto، نويسنده , , T. and Hayashi، نويسنده , , K. and Mitsunaka، نويسنده , , Y. and Komuro، نويسنده , , M.، نويسنده ,
Abstract :
A maximum pulse duration of 1.3 s was achieved with a power of 410 kW at a frequency of 110 GHz and a maximum power of 550 kW was obtained with short-pulse operations (ca. 2 ms). The oscillation mode of the gyrotron is the TE22,2 whispering gallery mode, which is transformed into a gaussian-like beam by a built-in quasi-optical mode converter. R.f. power is extracted through a sapphire double-disc window cooled by FC-75. In long-pulse operation, no damage was observed in the gyrotron.
