DEVELOPMENT OF TERAHERTZ GYROTRON AND ITS APPLICATION TO PLASMA SCATTERING MEASUREMENT

太赫兹回旋管的研制及其在等离子体散射测量中的应用

• 批准号: 06558062
• 负责人: IDEHARA Toshitaka
• 金额: $ 9.15万
• 依托单位: FUKUI UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06558062/
• 关键词: Gyrotron; Submillimeter wave; Terahertz; Plasma diagnostics; Submillimeter wave scattering measurement; Drift wave; ESR; Millimeter wave; プラズマ散乱計測; 超伝導マグネット; CHS; 密度揺動; サブミリ波光源; 振幅変調; 周波数変調; ガウシャン・ビーム; プラズマ; 準光学的アンテナ

In this project, we have developed frequency-tunable, medium power, submillimeter wave gyrotrons and applied them to submillimeter wave sacattering measurement of CHS plasma in National Institute for Fusion Science. Research results are summarized as follows,1) Ultra-high frequency operation of gyrotron by the second and the third harmonics Using 12T and 17T superconducting magnets, we developed high frequency gyrotrons whose frequensies are close to 1 terahertz. We have achieved the highest frequency of 847 GHz. This frequency is the world record of high frequency operation of gyrotron.2) cw operation of gyrotronWe have realized complete cw operation of the gyrotron and succeeded to achieve stabilities of amplitude and frequency of the gyrotron output, in order to apply the gyrotron to submillimeter wave spectroscopy as radiation source.3) Amplitude and frequency modulations of the submillimeter wave gyrotron output We have achived amplitude and frequency modulations of the gyrotron output for its application to wider fields.4) Studies on mode competition and mode cooperation between the fundamental and the second harmonic operations5) Development of quasi-optical transmission system for submillimeter wave gyrotrons outputs6) Development of a high sensitive detector in a millimeter wave range using a high T。 superconductor7) Plasma scattering measurement using a submillimeter wave gyrotron as a radiation sourceWe have applied the submillimeter wave scattering measurement system using our gyrotron (GYROTRON FU II) as a radiation source for CHS in National Institute for fUsion Science and succeeded in measurement of drift wave excited spontaneously in the device.8) Development of a high power, far-infrared laser and its application to plasma scattering measurement9) Study on the millimeterr wave ESR using a gyrotron as a radiation source

在本项目中，我们研制了频率可调谐的中功率亚毫米波回旋管，并将其应用于中国核聚变科学研究所CHS等离子体的亚毫米波散射测量。主要研究成果如下：1）二次谐波和三次谐波回旋管的超高频运转利用12T和17T超导磁体，研制出了频率接近1太赫兹的高频回旋管。最高频率达到847 GHz。2）回旋管的连续工作我们实现了回旋管的完全连续工作，并成功地实现了回旋管输出的幅度和频率的稳定，为了将回旋管作为辐射源应用于亚毫米波光谱学。亚毫米波回旋管输出的幅度和频率调制我们实现了回旋管输出的幅度和频率调制，使其应用范围更广。5）亚毫米波回旋管输出准光传输系统的研制6）毫米波高灵敏度探测器的研制超导体7）以亚毫米波回旋管为辐射源的等离子体散射测量我们应用了以回旋管为辐射源的亚毫米波散射测量系统（GYROTRON FU Ⅱ）作为CHS的辐射源，成功地测量了装置中自发激发的漂移波。8）研制了一种高功率，远红外激光及其在等离子体散射测量中的应用9）回旋管辐射毫米波ESR研究

项目成果

T. Idehara,他6名: "High-frequency, amplitude modulation of a submillimeter wave, medium power gyrotron" Phys. Plasmas. 1. 461-463 (1994)

T. Idehara 等 6 人：“亚毫米波中功率回旋管的高频调幅”，Phys. 1. 461-463 (1994)。

T. Idehara,他6名: "Amplitude modulation of submillimeter wave gyrotorn output" Int. J. Infrared and Millimeter Waves. 18 (in press). (1997)

T. Idehara 等 6 人：“亚毫米波回旋管输出的幅度调制”，Int. Infrared and Millimeter Waves 18（出版中）。

T. Idehara: "Development and applications of submillimeter wave gyrotrons" Proc. of 3rd Int. Conf. on Strong Microwave in Plasmas (in press). (1997)

T. Idehara：“亚毫米波回旋管的开发和应用”Proc。

K. kawahata,他5名: "Powerful and Stable cw Far-Infrared Lasers for Application to Fusion Plasma Diagnostics" Fusion Engineering and Design. (in press). (1997)

K. kawahata 和其他 5 人：“用于聚变等离子体诊断的强大且稳定的连续波远红外激光器”聚变工程和设计（1997 年出版）。

T.Idehara, et al: "Rapid frequency step-switching of a submillimeter wave gyrotron by modulation of the electron beam" Phys.Plasmas. 1-6. 1774-1776 (1994)

T.Idehara 等人：“通过电子束调制实现亚毫米波回旋管的快速频率步进切换”Phys.Plasmas。