Study on Slow-Wave Cyclotron Maser Based on Anomalous Doppler Effect

基于反常多普勒效应的慢波回旋脉泽研究

• 批准号: 12480116
• 负责人: OGURA Kazuo
• 金额: $ 9.34万
• 依托单位: NIIGATA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12480116/
• 关键词: anomalous Doppler effec; slow-wave cyclotron interaction; Cherenkov interaction; maser; slow-wave structure; large diameter; microwave; millimeter wave; Kバンド; Qバンド; 遅波サイクロトロンメーザ; チェレンコフ発振; 冷陰極; 遅波導波管; 遅波サイクロトロン共鳴; 陰極構造; ロングパルス; 電子ビーム源

In this research, slow-wave cyclotron maser based on the induced radiation at the anomalous Doppler cyclotron frequency has been proposed The outline of this work is summarized.・Magnetic system and electron beamMagnetic system has been newly built. The magnetic field configuration is controlled by the current distribution of magnetic coils. And the uniform magnetic field is obtained in the range of the 414mm of the axial direction, and the 60mm of the radial direction. By controlling the magnetic field, the electron beam of about 60kV and several hundreds A is able to propagate over 360mm in a vacuum vessel.・Slow-wave cyclotron maser based on the anomalous Doppler effectThe theoretical analysis of slow-wave cyclotron maser has been published in Physical Review E as a regular article. K-band microwave generation has been investigated experimentally. Oscillation frequency is in the range of 20 to 25 GHz, and radiation power is about 100kW (about 2%) at the maximum. In a lower magnetic fi … More eld region, the oscillations in non-axisymmetric mode are observed, which may be attributed to slow-wave cyclotron maser operation based on the anomalous Doppler effect. This shows the possibility of the control of the Cherenkov interaction and the slow-wave cyclotron interaction by a magnetic field.・Experimental research aiming at higher frequency operationFor higher frequency operation in millimeter wave region, a Q-band large diameter slow-wave structure is manufactured. With this slow-wave structure, the millimeter wave with a frequency of about 35GHz is obtained. Radiation power is about 30kW or less (the oscillation efficiency is about 0.4%) at the maximum, ard is about 1/4 compared with K-band experiments.Control with the high accuracy of a beam is required for resonance-operation with the slow-wave cyclotron interaction and the Cherenkov interaction, or stabilization operation in a lower magnetic field region. Technology for such control of large current electron beam propagation is a future subject. It is necessary to make theoretical analysis and experiment cooperate and to advance research. Less

本文提出了一种基于反常多普勒回旋频率感应辐射的慢波回旋脉塞。磁系统和电子束磁系统已新建。磁场的结构是由磁线圈的电流分布控制的。在轴向414 mm和径向60 mm范围内获得了均匀的磁场。通过控制磁场，可使60 kV、几百A的电子束在真空室中传输360 mm。基于反常多普勒效应的慢波回旋脉塞的理论分析已作为定期文章发表在《物理评论E》上。对K波段微波产生进行了实验研究。振荡频率在20 ~ 25 GHz范围内，最大辐射功率约为100 kW（约2%）。在较低的磁场中， ...更多信息 场区，观察到非轴对称模振荡，这可能归因于基于反常多普勒效应的慢波回旋脉塞运转。这表明了用磁场控制切伦科夫相互作用和慢波回旋相互作用的可能性。·针对毫米波高频工作的实验研究为了实现毫米波高频工作，研制了Q波段大口径慢波结构。利用这种慢波结构，获得了频率约为35 GHz的毫米波。最大辐射功率约为30 kW或更小（振荡效率约为0.4%），与K波段实验相比约为1/4，需要对束流进行高精度控制，以实现慢波回旋相互作用和切伦科夫相互作用的共振运转，或在低磁场区的稳定运转。大电流电子束传输的这种控制技术是一个未来的课题。理论分析与实验相结合，推进研究是必要的。少

项目成果

Osamu Watanabe他: "Self-Consistent Linear Analysis of Slow Cyclotron and Cherenkov Instabilities"Physical Review E. 63・5-1. 056503-1-056503-9 (2001)

Osamu Watanabe 等：“慢速回旋加速器和切伦科夫不稳定性的自洽线性分析”物理评论 E. 63・5-1（2001）。

Kazuo Ogura他: "Experiment on Oversized Backward Wave Oscillator Driven by Weakly Relativistic Electron Beam"電気学会研究会資料プラズマ・パルスパワー合同研究会. PST02/PPT02. 41-44 (2002)

Kazuo Ogura 等人：“弱相对论电子束驱动的超大反向波振荡器的实验”IEEJ 研究组材料等离子体脉冲功率联合研究组 (2002)。

K.Ogura 他: "Experiment on Oversized Backward Wave Oscillator Driven by Weakly Relativistic Electron Beam"電気学会研究会資料プラズマ・パルスパワー合同研究会. PST02/PPT02. 41-44 (2002)

K. Ogura 等人：“弱相对论电子束驱动的超大反向波振荡器的实验”IEEJ 研究组材料等离子体脉冲功率联合研究组 (2002)。

Osamu Watanabe他: "Normal Modes and Their High-Frequency Instabilities in Unbounded and Bounded Systems with Magnetized Electron Beam"Journal of Plasma and Fusion Research SERIES. 3. 601-604 (2000)

Osamu Watanabe 等人：“磁化电子束无界和有界系统中的正则模式及其高频不稳定性”《等离子体与聚变研究杂志》系列。 3. 601-604 (2000)

Osamu Watanabe他: "Cherenkov and Slow Cyclotron Instabilities of Non-Axisymmetric Modes in Periodic Slow Wave Structure"電気学会研究会資料プラズマ・パルスパワー合同研究会. PST02/PPT02. 45-48 (2002)

Osamu Watanabe 等人：“周期性慢波结构中非轴对称模式的切伦科夫和慢回旋不稳定性”IEEJ 研究组材料等离子体和脉冲功率联合研究组 (2002)。