Excitation of Large Amplitude Electron Plasma Wave by Means of Wakefield with High Power Microwave

高功率微波韦克场激发大振幅电子等离子体波

• 批准号: 04452308
• 负责人: NISHIDA Yasushi
• 金额: $ 0.9万
• 依托单位: Utsunomiya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04452308/
• 关键词: Microwave-Plasma Interaction; Plasma based Accelerator; Ion Wave Wakefield; Beam-Plasma Interaction; Temporal Plasma Wave Echoes; Mach-cone Shockwave; VpxB Linear Accelerator; VpxB TWT Amp.; プラズマ航跡場; 電子プラズマ波; プラズマ加速器; 遅波回路; Vp×B加速; イオン波; 2-プ

The objectives of the present investigations are :(1)Excitation of large amplitude electron plasma wave by means of wakefield method with high power electromagnetic waves, (2)Nonlinear, strong interaction between waves and particles in plasma, and (3)Clarification of the electron acceleration mechanism in its method.For the tasks mentioned above, we have done investigations to get results both of, (1) new phenomena including Mach-cone structure formed by high energy bunch of electrons and ion wave wakefield observed near the resonance absorption layr of microwave-nonuniform plasma interaction. Here, high energy electron bunch is produced by an electron plasma wave wakefield. Temporal plasma wave echoes are also found for the first time after the theoretical prediction of more than 25 years ago. (2) Ion wave wakefield excitation and ion acceleration have been investigated precisely to clarify the interaction mechanism. (3) Strong interaction between high energy electron bunch (- 20 MeV) and plasmas has been investigated precisely for the fundamental understanding of plasma based high energy particle accelerators. (4) Development of sheet shaped, new plasma sources for the plasma process or plasma based particle accelerators has been tried. (5) the development of an electron linear accelerator based on the VpxB principle with TE-mode electromagnetic wave has been carried out successfully, and (6) the development of VpxB traveling wave amplifier, which uses inverse process of VpxB acceleration, is under way.

本研究的目标是：（1）通过高功率电磁波尾场方法激发大幅电子等离子体波，（2）等离子体中波与粒子之间的非线性强相互作用，以及（3）澄清针对上述任务，我们进行了研究，得到了以下两个结果：（1）新现象，包括高能电子束形成的马赫锥结构和在共振吸收层附近观察到的离子波尾场的微波-非均匀等离子体相互作用。这里，高能电子束是由电子等离子体波尾场产生的。继25年前的理论预测之后，这也是首次发现时间等离子体波回波。 (2)对离子波尾场激发和离子加速进行了精确研究，阐明了相互作用机制。 (3)精确研究了高能电子束(-20MeV)与等离子体之间的强相互作用，为基于等离子体的高能粒子加速器的基本理解提供了基础。 (4)已经尝试开发用于等离子体处理的片状新型等离子体源或基于等离子体的粒子加速器。 (5)基于TE模电磁波VpxB原理的电子直线加速器的研制已成功进行，(6)利用VpxB加速逆过程的VpxB行波放大器的研制正在进行中。

项目成果

T.Nagasawa and Y.Nishida: ""Large Amplitude Pulse Response at the Plasma Boundary in an Ion Beam System"" Phys.Rev.E.

T.Nagasawa 和 Y.Nishida：“离子束系统中等离子体边界的大振幅脉冲响应”Phys.Rev.E。

H.Nakanishi et al.: "Wakefield accelerator using twin linacs" Nucl.Instr.and Methods in Phys.Res.A328. 596-598 (1993)

H.Nakanishi 等人：“使用双直线加速器的韦克菲尔德加速器”Nucl.Instr.and Phys.Res.A328 中的方法。

Y.Nishida,K.Yoshida and T.Nagasawa: "Refraction and reflection of ion acoustic solitons by space charge sheaths" Phys.Fluids. B5. 722-731 (1993)

Y.Nishida、K.Yoshida 和 T.Nagasawa：“空间电荷鞘对离子声孤子的折射和反射”Phys.Fluids。

N.Yugami, S.Kusaka and Y.Nishida: ""Observation of Temporal Plasma-Echoes in an Ion-Wave Regime"" Phys.Rev.E.49(in press). (1994)

N.Yugami、S.Kusaka 和 Y.Nishida：“离子波状态下的时间等离子体回声的观察”Phys.Rev.E.49（印刷中）。

N.Yugami, S.Kusaka, Y.Nishida, B.Cros and G.Mattieussent: ""Large Amplitude Wakefield in an Ion Wave Regime Excited by Short Microwave Pulse"" Phys.Rev.Lett.

N.Yugami、S.Kusaka、Y.Nishida、B.Cros 和 G.Mattierussent：“短微波脉冲激发的离子波状态中的大振幅尾场”Phys.Rev.Lett。