Plasma Diagnostics Using Millimeter-and Submillimeter-Wave Two-Dimensional Imaging Array

使用毫米波和亚毫米波二维成像阵列进行等离子体诊断

• 批准号: 05558056
• 负责人: MASE Atsushi
• 金额: $ 2.62万
• 依托单位: University of Tukuba
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05558056/
• 关键词: Millimeter Wave; submillimeter Wave; Two-Dimensional Detector; Plasma Diagnostics; Phase Imaging; ECEImaging; イメージ測定

1)During the period of this research project, a new phase imaging interferometer with frequency of 70 GHz has been developed. The system consists of the following components.i)Two-dimensional detector array was newly developed. The detector has 4x4 channels consisting of beam-lead GaAs Schottky barrier diodes bonded to bow-tie antennas monolithically fabricated on a fused-quartz substrate.ii)The interferometer consists of a quasi-optical transmission system and a heterodyne receiver with two separate oscillators. The beat frequency between the oscillators is stabilized by using a phase-lock-loop circuit. A double down-converted system(frequency tracking receiver)enabled us to use phase detectors with center frequency of 455kHz.2)The phase imaging interferometer has been to the plug cell of the GAMMA 10 tandem mirror. The spatial resolution of the interferometer is given by the aperture of the antenna array and the magnification of the optical system. The vertical resolution was estimat … More ed to be 2.7cm and horizontal one was 2.5cm, which were calibrated with a dielectric target. The phase resolution was less than 1/200 fringe, which equals to the line density of 2.5x10^<11>cm^<-2>. The system was successfully applied to the measurement of the line density profile during the operation of plug-potential formation.3)The imaging system has also been applied to the measurement of electron cyslotron emission(ECE)as a heterodyne receiver. From the ratio of the optically thin ordinary and extraordinary mode emission signals, we have determined the radial as well as axial profile of the warm and hot electron temperature of the plug-cell plasma. The temperature fluctuation were investigated from correlation study of two ECE signals. This was the first application to ECE imaging measurement.4)The detector was tested at the higher frequency of 90 GHz region. The sensitivity was similar to that at the frequency of 70 GHz. The monolithic imaging array with antennas and GaAs Schottky diodes completed on a substrate has been investigated for the application to millimeter to submillimeter wave. Less

1)在本课题研究期间，研制了一种频率为70 GHz的新型相位成像干涉仪。该系统由以下组件组成。i)新开发的二维探测器阵列。探测器具有4x4通道，由束引线GaAs肖特基势垒二极管连接到在熔融石英衬底上单片制造的领结天线组成。ii)干涉仪由准光传输系统和带两个独立振荡器的外差接收器组成。振荡器之间的拍频通过锁相环电路来稳定。双下变频系统（频率跟踪接收器）使我们能够使用中心频率为455kHz的相位检测器。2)将相位成像干涉仪移至GAMMA - 10串联反射镜的塞槽。干涉仪的空间分辨率由天线阵列的孔径和光学系统的放大倍数决定。垂直分辨率估计为2.7cm，水平分辨率估计为2.5cm，用介质靶标定。相位分辨率小于1/200条纹，即线密度为2.5 × 10^<11>cm^<-2>。该系统已成功应用于plug-potential地层作业过程中的线密度剖面测量。3)该成像系统还作为外差接收器应用于电子回旋发射（ECE）的测量。从光学薄的普通模式和特殊模式发射信号的比值，我们确定了插头电池等离子体的暖电子温度和热电子温度的径向和轴向分布。通过对两个ECE信号的相关性研究，对温度波动进行了研究。这是第一次应用于ECE成像测量。4)对探测器进行了90 GHz频段的高频测试。灵敏度与70 GHz频率下的灵敏度相近。研究了在基板上完成的由天线和GaAs肖特基二极管组成的单片成像阵列在毫米波到亚毫米波中的应用。少

项目成果

T.Tokuzawa: "A Fast-Swept Microwave Reflectometer for Density Proflie Measurement on GAMMA 10" Conferrence Digest of 19th Int. Conf. on Infrared and Millimeter-Waves. 307-308 (1994)

T.Tokuzawa：“用于 GAMMA 10 密度剖面测量的快速扫描微波反射计”第 19 届国际会议文摘。

J.Bae, T.Nozokido, H.Shirai, H.Kondo, and K.Mizuno: ""High Peak Power and High Repetition Rate Characteristics in a Current-Pulsed Q-Switched Laser with a Mechanical Shutter"" IEEE.J.Quantum Electron. Vol.30, No.4. 887-892 (1994)

J.Bae、T.Nozokido、H.Shirai、H.Kondo 和 K.Mizuno：“具有机械快门的电流脉冲调 Q 激光器的高峰值功率和高重复率特性” IEEE.J。

A.Mase: "Measurements of ICRF Waves in the GAMMA 10 Tandem Mirror Using Reflectometers" Review of Scientific Instruments. 66. 821-823 (1995)

A.Mase：“使用反射计测量 GAMMA 10 串联镜中的 ICRF 波”科学仪器评论。

T.Tamano: "Energy and Particle Confinement in the GAMMA 10" International Conference on Open Plasma Confinement Systems for Fusion(World Scientific). 97-104 (1994)

T.Tamano：“GAMMA 10 中的能量和粒子约束”国际聚变开放等离子体约束系统会议（世界科学）。

A.Mase: "Microinstabilities in the Central Cell Plasma of GAMMA 10" International Conference on Open Plasma Confinement Systems for Fusion(World Scientific). 211-220 (1994)

A.Mase：“GAMMA 10 中心细胞等离子体中的微观不稳定性”国际聚变开放等离子体约束系统会议（世界科学）。