Studies of high power oscillation source with frequency tunability in the millimeter and sub-millimeter waves

毫米波和亚毫米波频率可调大功率振荡源研究

• 批准号: 18560042
• 负责人: ATSUSHI Kasugai
• 金额: $ 1.54万
• 依托单位: Japan Atomic Energy Agency
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18560042/
• 关键词: Plasma, Fusion; Electron device; Terahertz; millimeter wave; Gvrotron

The output power and pulse duration of previous gyrotron for fusion reactor were 0.5MW and 100s or 0.2MWand 550s in the frequency range of 0.17 THz, respectively. However, a continuous-wave gyrotron is required for academic research and industrial application even if some output power decreased. For this purpose, suppression of outgases due to overheating inside the gyrotron and instabilities, which limit the pulse duration of the gyrotron, is indispensable.In this study, the parameters of the 0.17T gyrotron for fusion research, which is modified in a mode converter, an electron gun and control circuit, are optimized in the oscillation experiment in 2006. As a result, demonstration of 0.6MW output power, 46% efficiency and 1 hour (3600s) operation were carried out because the vacuum pressure in the gyrotron was stabilized in the low level of l×10-8 torr in the long pulse operation.Furthermore, the demonstrations of 1MW-800s-55% and 0.8MW-2000s-57% were successful and high power, high efficiency and steady state operation were also accomplished. This result shows the high reliability of the gyrotron because total output energy exceed more than 150GJ.High-speed sweep experiment of magnetic field of 7T-SCM for gyrotron oscillation was also carried out as a start-up of frequency tenability of the gyrotron. The sweep rate of 02T/5s was checked. As a result, the preparation of the experiment for the fast frequency tunability has been accomplished and an outlook for research to high frequency and tunability gyrotron has been also obtained.

在0.17THz的频率范围内，以前用于聚变堆的回旋管的输出功率和脉冲宽度分别为0.5MW和100 s或0.2MW和550 s。然而，即使输出功率有所下降，学术研究和工业应用仍需要连续波回旋管。为了实现这一目标，抑制由于回旋管内部过热和不稳定性，这限制了回旋管的脉冲宽度，出气是必不可少的。在这项研究中，0.17 T回旋管的参数进行了优化，用于聚变研究，这是在一个模式转换器，电子枪和控制电路的修改，在2006年的振荡实验。在长脉冲运行中，回旋管真空度稳定在1 ×10 ~（-8）Pa的低水平，实现了0.6MW输出功率、46%效率和1小时（3600 s）运行的验证，并成功地进行了1 MW-800 s-55%和0.8MW-2000 s-57%的高功率验证。还实现了高效率和稳态操作。实验结果表明，回旋管的总输出能量超过150 GJ，具有很高的可靠性。作为回旋管频率稳定性的启动，还进行了7 T-SCM回旋管振荡磁场的高速扫描实验。检查02 T/5s的扫描速率。完成了快频调谐实验的准备工作，并对高频可调谐回旋管的研究进行了展望。

项目成果

ITER用ミリ波源ジャイロトロンの現状と核融合炉へ向けた展望

ITER毫米波源回旋管现状及聚变反应堆展望

• 发表时间: 2007
• 期刊: 平成19年電気学会全国大会講演論文集[7]エネルギー変換・輸送 Vol.7
• 作者: 春日井 敦;他
• 通讯作者: 他

Demonstration of Steady State Operation with 1MW of 170GHz Gyrotron for ITER

ITER 1MW 170GHz 回旋管的稳态运行演示

• 发表时间: 2007
• 期刊: 17th Topical Conference of Radio Frequency Power in Plasma, Vol.933
• 作者: A. Kasugai;et. al.
• 通讯作者: et. al.

High power and bigh efficiency operation of 170GHz gyrotron

170GHz 陀螺仪的高功率和高效率运行

• 发表时间: 2007
• 期刊: IEEE Transaction of Fusion Science and Technology 51, 2T
• 作者: A. Kasugai;R. Minami;K. Takahashi;N. Kobayashi;T. Kariya;Y. Mitsunaka;K. Sakamoto
• 通讯作者: K. Sakamoto

Evelopment of 1MW-CW gyrotron for ITER

ITER 1MW-CW 回旋管的研制

• 发表时间: 2007
• 作者: A. Kasugai;K. Sakamoto;K. Takahashi;K. Kajiwara;Y. Ikkeda;S. Komori;N. Kobatyashi;T. Kariya;R. Minami;Y. Mitsunaka
• 通讯作者: Y. Mitsunaka

ITER用1MW連続出力ジャイロトロンの開発

为ITER开发1MW连续输出陀螺仪

• 发表时间: 2007
• 作者: 春日井 敦;他
• 通讯作者: 他