Microwave Generation during 100 keV Electron Beam Relaxation in GOL-3

Бурдаков, А. В.; Arzhannikov, A. V.; Burmasov, V. S.; Иванов, И. А.; Ivantsivsky, M. V.; Kandaurov, I. V.; Kuznetsov, S. А.; Kurkuchekov, V. V.; Mekler, K. I.; Polosatkin, S. V.; Попов, Сергей Сергеевич; Поступаев, В. В.; Rovenskikh, A. F.; Sklyarov, V. F.; Thumm, M.; Trunev, Yu.A.; Vyacheslavov, L. N.

doi:10.13182/fst13-a16930

Cited by 33 publications

(21 citation statements)

References 8 publications

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“…In the real experiment, a beam is created by a diode with a plasma emitter in the region with the low external magnetic field (0.01 T). After acceleration to the required energy, the beam electrons remain almost monoenergetic, but acquire an angular distribution with a characteristic scatter Δ = 0.015 19,43 . Further transportation of the beam to the region of a strong magnetic field leads to compression of its transverse size in hundreds of times and is accompanied by a significant increase in the angular spread.…”

Section: B Electron Beam Distributionmentioning

confidence: 99%

“…According to the simulation results, relaxation of an electron beam with an energy of 100 keV and a current of 75 A in the conditions of the laboratory experiment at the GOL-3 facility 19 should proceed according to the following scenario. The beam ionizes the gas in its cross section and, due to the development of the two-stream instability, excites longitudinal oscillations in the resulting plasma channel.…”

Section: Scenario Of Experimentsmentioning

confidence: 99%

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Highly efficient electromagnetic emission during 100 keV electron beam relaxation in a thin magnetized plasma

2019

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In this paper, electromagnetic emissions produced by a beam-plasma system are investigated using particlein-cell simulations for the particular case when the typical transverse size of both 100 keV electron beam and produced plasma channel is comparable to the radiation wavelength. The interest in this regime of beamplasma interaction is associated with highly efficient generation of electromagnetic waves near the plasma frequency harmonics that has been recently observed in laboratory experiments on the GOL-3 mirror trap. It has been found that the radiation power only from the vicinity of the doubled plasma frequency in these experiments can reach 1% of the total beam power. Subsequent theoretical and simulation studies have shown that the most likely candidate for explaining such efficient generation of electromagnetic radiation is the mechanism of a beam-driven plasma antenna based on the conversion of the most unstable plasma oscillations on a longitudinal density modulation of plasma ions. In this paper, we investigate how effectively this mechanism can work in a real experiment at the GOL-3 facility, when a thin sub-relativistic electron beam gets a large angular spread due to compression by a magnetic field, and the gas into which it is injected has macroscopic density gradients.

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Section: B Electron Beam Distributionmentioning

confidence: 99%

Section: Scenario Of Experimentsmentioning

confidence: 99%

Highly efficient electromagnetic emission during 100 keV electron beam relaxation in a thin magnetized plasma

2019

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“…The main peculiarities of these experiments are the small plasma size and relatively strong guiding magnetic field. It has been experimentally found that the beam power converts to radiation power much more efficiently when the typical transverse size of the beam-plasma system becomes comparable to the radiation wavelength [1]. These experiments have motivated theoretical studies on the mechanism of EM emission in the thin plasma case [2].…”

Section: Introductionmentioning

confidence: 99%

Theory of electromagnetic wave generation via a beam-plasma antenna

Volchok¹,

Тимофеев²,

Annenkov³

2016

AIP Conference Proceedings

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Particle-in-cell simulations of 100 keV electron beam interaction with a thin magnetized plasma AIP Conference Proceedings 1771, 070011 (2016) Abstract. In this work, we propose a theory describing generation of electromagnetic waves in a thin beam-plasma system with a characteristic transverse size comparable with the radiation wavelength. Such a theory can be useful for the description of the processes responsible for EM emission in beam-plasma experiments at the GOL-3 multi mirror trap.

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“…At the multi-mirror trap GOL-3 (BINP SB RAS, Novosibirsk), recent laboratory experiments have demonstrated the regime at which 1% of the beam power is converted to the power of electromagnetic emission. The main pecularity of this regime is that a 100 keV electron beam creates a thin plasma column with the diameter comparable to the radiation wavelength [1]. Theoretical studies [2,3,4] motivated by these experiments have shown that such a high level of radiation efficiency can be explained by the mechanism of beam-plasma antenna.…”

Section: Introductionmentioning

confidence: 99%