High power 170 GHz gyrotron with synthetic diamond window
High power 170 GHz gyrotron with synthetic diamond window
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带人造金刚石窗口的高功率 170 GHz 陀螺仪
DOI：
10.1063/1.1149567
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发表时间：
1999
影响因子：
1.6
通讯作者：
Y. Mitsunaka
中科院分区：
文献类型：
--
作者：
K. Sakamoto;A. Kasugai;M. Tsuneoka;Koji Takahashi;T. Imai;T. Kariya;Y. Mitsunaka
在170 GHz回旋管上安装了一个大尺寸的人造金刚石窗口组件。窗口的孔径和厚度分别为83和2.23 mm，其边缘直接由水冷却。回旋管的性能达到520千瓦在6.2秒和450千瓦在8秒。窗户的温度升高在105秒后稳定，而传统窗户的功率被限制在170 kW以下。这种可输送功率的急剧提高是由于金刚石的优异性能，即极高的热导率（1800 W/mK）和低的损耗角正切值（tan δ 1 s），但在回旋管和金刚石窗口上都没有发现损坏或故障。这些结果给出了回旋管输出多兆瓦功率的前景，即，金刚石窗解决了高功率器件发展中最严重的窗口问题。
A large sized synthetic diamond window assembly was installed on a 170 GHz gyrotron. An aperture and a thickness of the window are 83 and 2.23 mm, respectively, whose edge was directly cooled by water. Gyrotron performances of 520 kW at 6.2 s and 450 kW at 8 s were attained. A temperature increase of the window stabilized after ∼5 s, whereas the power had been limited to below 170 kW with conventional windows. This drastic improvement of a deliverable power was obtained from the outstanding properties of the diamond, that is, an extremely high thermal conductivity (∼1800 W/mK) and a low value of loss tangent (tan δ 1 s), but no damage nor trouble was found both on the gyrotron and the diamond window. These results give a prospect for a multimegawatt power output from the gyrotron, i.e., the diamond window gives a solution for the window problem which has been regarded as the most serious issue on the development of high powe...