2004 Fiscal Year Final Research Report Summary
Enhancement of superradiance using modified intense relativistic electron beams
| Project/Area Number |
15540468
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Plasma science
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| Research Institution | Kanazawa University |
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Principal Investigator |
KAMADA Keiichi Kanazawa University, Graduate school of natural science & technology, Associate Professor, 自然科学研究科, 助教授 (90143875)
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| Co-Investigator(Kenkyū-buntansha) |
ANDO Ritoku Kanazawa University, Graduate school of natural science & technology, Associate Professor, 自然科学研究科, 助教授 (80212679)
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| Project Period (FY) |
2003 – 2004
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| Keywords | electron beam / superradiance / microwave / intence electromagnetic wave / cavity / S-band / autoacceleration |
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| Research Abstract |
Stimulated emission from electron bunches - superradiance(SR) is an attractive method of generating ultrashort electromagnetic pulses. Here, we carried out the experiments on S-band superradiance. The most effective generation of SR pulses at S-band is obtained by Cherenkov mechanism with short electron beam moving in corrugated waveguide. And the long wavelength in S-band makes it possible to employ an intense relativistic electron beam with pulse duration of 10 ns. In the experiment, 5 GHz, 300 MW microwave with duration of 5 ns was obtained using a 600 keV, 5 kA intense relativistic electron beam with duration of 12 ns injected into the corrugated waveguide. The radiation mode was observed to be TM01 as expected in SR. PIC simulation indicated that the radiation was caused by superradiance. A coaxial cavity was used to modify the time evolution of the energy waveform of an electron beam. The output power of SR was 20% increased using the modified energy waveform. It could be possible to increase the output power of superradiance by modifying the energy waveform of an intense electron beam.
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[Journal Article] Transformation of Energy and Current Waveforms of an Intense Relativistic Electron Beam using Cavities2004
Author(s)
K.Kamada, K.Yamamoto, R.Nakajima, K.Ishibana, R.Ando, I.V.Zotova, R.M.Rozental, A.S.Sergeev, N.S.Ginzburg
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Journal Title
Proc.15th Int.Conf.High-Power Particles Beams, (St.petersburg, 2004) (DVD 1027)
Description
「研究成果報告書概要(欧文)」より
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