| Project/Area Number |
04452308
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Morphological basic dentistry
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| Research Institution | Utsunomiya University |
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Principal Investigator |
NISHIDA Yasushi Utsunomiya University, Dept.of Electrical and Electronic Eng., Professor, 工学部, 教授 (00005315)
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| Co-Investigator(Kenkyū-buntansha) |
YUGAMI N. Utsunomiya University, Dept.of Electrical and Electronic Eng., Research Associat, 工学部, 助手 (60220521)
NAGASAWA T. Utsunomiya University, Dept.of Electrical and Electronic Eng., Associate Profess, 工学部, 助教授 (10118440)
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| Project Period (FY) |
1992 – 1993
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| Project Status |
Completed (Fiscal Year 1993)
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| Budget Amount *help |
¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1993: ¥1,400,000 (Direct Cost: ¥1,400,000)
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| Keywords | 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-プラズモン不安定性 / プラズマ波エコー / 短パルスマイクロ波 |
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| Research Abstract |
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.
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