Transmission of dense electron beam through the input mirror of the linear magnetic system

Astrelin, V. T.; Kandaurov, I. V.; Kurkuchekov, V. V.; Trunev, Yu.A.

doi:10.1063/1.4964175

Cited by 3 publications

(3 citation statements)

References 4 publications

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“…Radial profile of X-ray picture is well described by a Gaussian curve with FWHM of 9.2 mm. It is close to the beam characteristic size calculated according to the law of conservation of adiabatic invariant [15] along magnetic field, as well as comparable with a beam footprint at the target (Figure 3c) with typical diameter of about 15 mm. The data allows one to calculate the thermal load of the target in diagnostic experiments, measuring only voltage and current of electron gun diode.…”

Section: Resultssupporting

confidence: 84%

Heating of tungsten target by intense pulse electron beam

Trunev

Arakcheev

Burdakov

et al. 2016

AIP Conference Proceedings

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Section: Resultssupporting

confidence: 84%

Heating of tungsten target by intense pulse electron beam

Trunev

Arakcheev

Burdakov

et al. 2016

AIP Conference Proceedings

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“…Overall, the theoretical curve agrees well with the experimental data, except the highest mirror ratio values when the FC current declines faster. This difference, apparently, can be explained due to the effect of the beam space charge [7].…”

Section: Experiments and Resultsmentioning

confidence: 97%

Angular distribution of beam electrons in a source with arc plasma emitter

Kurkuchekov

Astrelin

Kandaurov

et al. 2017

J. Phys.: Conf. Ser.

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Abstract. Results on studying the angular characteristics of an electron beam, generated in a multi-aperture diode with an arc-discharge plasma emitter are reported. The main beam parameters were as follows: the electron energy up to 120 keV, the emission current up to 100 A, the pulse duration 0.1 -0.3 ms, and the initial diameter ca. 8 cm. The beam was formed and transported to a metal target in an adiabatically converging magnetic field. The diagnostic technique based on an X-ray imaging of the profiles of individual beamlets passed through the pepperpot-like mask was developed and used to investigate an angular distribution of the beam electrons. The spatial resolution of the diagnostic was evaluated in a special test experiment and found to be not worse than 4 lp/cm at a 10 % contrast level. It was demonstrated that an angular distribution of the beam electrons fits well by the Gaussian function with the RMS width ~ 0.067 rad. The data on the angular distribution measured with pepperpot diagnostic are in a good agreement with those obtained in the experiments on the beam passage through a magnetic mirror.

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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%

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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Transmission of dense electron beam through the input mirror of the linear magnetic system

Cited by 3 publications

References 4 publications

Heating of tungsten target by intense pulse electron beam

Heating of tungsten target by intense pulse electron beam

Angular distribution of beam electrons in a source with arc plasma emitter

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

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