Emittance Variation of a High-Current Relativistic Electron Beam in a Bend Magnet

Sandalov, Evgeny S.; Sinitsky, S. L.; Skovorodin, D. I.; Nikiforov, D. A.; Logachev, P. V.; Starostenko, A. A.; Akhmetov, A. R.; Nikitin, O. A.

doi:10.1109/tps.2021.3105661

Cited by 4 publications

(3 citation statements)

References 16 publications

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“…После прохождения ускоряющей структуры ЛИУ электронный пучок с помощью системы разводки (см. [21]) направляется в один из двух каналов: прямой или боковой, в которых он может быть использован для различных приложений, в частности, в ЛСЭ-генераторе ТГц излучения.…”

Section: общая схема лиу на энергию электронов до 20 мэвunclassified

Investigation of the Increment of Transverse Instability of a Kiloampere Electron Beam in a Linear Induction Accelerator for Its Use in a Terahertz FEL

Sandalov

Sinitsky

Skovorodin

et al. 2022

jour

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The Institute of Nuclear Physics SB RAS in cooperation with the Russian Federal Nuclear Center VNIITF performs a series of researches aimed at acquiring a relative electron beam with energy up to 20 MeV, current up to 2 kA, and duration up to 200 ns at normalized emittance ca. 1000 π∙mm∙rad in a linear induction accelerator (LIA). In order to generate electron beams with such parameters we require thorough investigation of all main sources of perturbation of electron beam trajectory caused by different instabilities that occur during the transport and acceleration of a high currency beam in the accelerating structure of LIA. For the experimental series on measuring the dynamics of transverse oscillation of a beam, we applied a set of fast current transformers which are used for registration of beam current and mode fields caused by this beam in the structure. These measurements were performed for the electron beam with the energy of 8.5 MeV and current of 1 kA going through the structure at different modes of focusing magnetic fields size in LIA. As a result, we registered oscillation of the electromagnetic field of normal modes in the accelerating modules of LIA, as well as we determined the dependence of the oscillation amplitude of these modes’ EM field on the number of accelerating module. This dependence was compared with the result of modeling of development dynamics of transverse instability in LIA that was performed using the created program system. This allowed us to determine the size of the increment of transverse instability of a relativistic electron beam under the given experimental conditions. Based on the acquired results, we made the analysis of possibility to use the beam generated in ILA as a driver for the FEL generator of coherent impulses of THz radiation within the frequency range of 0.3–1.2 THz with a sub-gigawatt level of power.

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Section: общая схема лиу на энергию электронов до 20 мэвunclassified

Investigation of the Increment of Transverse Instability of a Kiloampere Electron Beam in a Linear Induction Accelerator for Its Use in a Terahertz FEL

Sandalov

Sinitsky

Skovorodin

et al. 2022

jour

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“…A great progress in the development of research in this direction should be considered the project of a terahertz FEL based on the beam generated by a linear induction accelerator (LIA), proposed by the BINP SB RAS (Novosibirsk) in collaboration with the IAP RAS (Nizhny Novgorod) [27]. Such an accelerator, created by the BINP, has the following parameters: beam current -up to 2 kA, electron energy -up to 20 MeV, pulse duration -about 100 ns [28][29][30]. These parameters of the beam open up the possibility of generating submillimeter radiation with a narrow spectral line at an energy content in a single pulse of ∼ 10 − 100 J [28], [31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Energy Content and Spectral Composition of a Sub-Millimeter Radiation Flux Generated by a High-Current Electron Beam in a Plasma Column with Density Gradients

Sandalov¹

2022

Preprint

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<div>The paper presents the results of experimental studies on the radiation flux generation in the sub-millimeter wavelength range due to a strong beam-plasma interaction. A relativistic electron eam (REB) with parameters 0.5 MeV / 12 kA / 6 us pumps plasma waves in a plasma column with a length of ~2 m at a plasma density of ~10^15cm-3 in a magnetic field of B~4 T. In the presence of density gradients in the plasma column, direct measurements of the energy content of the radiation flux 18 cm in diameter leaving the plasma column into the atmosphere showed that its value reaches 5-7 J. The pulse duration of the flux at half of its amplitude was about of 0.5 ?s, therefore, the pulse power was at the level of ~ 10 MW. In this series of experiments, the spectral composition of the radiation flux in the frequency range 0.1-0.5 THz as well as the energy distribution function of the beam electrons passed through the plasma have been measured.</div>

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“…A great progress in the development of research in this direction should be considered the project of a terahertz FEL based on the beam generated by a linear induction accelerator (LIA), proposed by the BINP SB RAS in collaboration with the IAP RAS (Nizhny Novgorod) [27]. Such an accelerator, created by the BINP, has the following parameters: beam current up to 2 kA, electron energy up to 20 MeV, and pulse duration about 100 ns [28]- [30]. These parameters of the beam open up the possibility of generating submillimeter radiation with a narrow spectral line at an energy content in a single pulse of ∼10-100 J [28], [31]- [35].…”

mentioning

confidence: 99%

Energy Content and Spectral Composition of a Submillimeter Radiation Flux Generated by a High-Current Electron Beam in a Plasma Column With Density Gradients

Аржанников

Sinitsky

Попов

et al. 2022

IEEE Trans. Plasma Sci.

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This article presents the results of experimental studies on radiation flux generation in the submillimeter wavelength range due to a strong beam-plasma interaction. A relativistic electron beam (REB) with parameters 0.5 MeV/12 kA/6 µs pumps plasma waves in a plasma column with a length of ∼2 m at a plasma density of ∼10 15 cm −3 in a magnetic field of ∼4 T. In the presence of density gradients in the plasma column, direct measurements of the energy content of the radiation flux 18 cm in diameter leaving the plasma column into the atmosphere showed that its value reaches 5-7 J. The pulse duration of the flux at half of its amplitude was about 0.5 µs, and therefore, the pulse power was at the level of ∼10 MW. In this series of experiments, the spectral composition of the radiation flux in the frequency range of 0.1-0.5 THz and the energy distribution function of the beam electrons passed through the plasma have been measured.

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Emittance Variation of a High-Current Relativistic Electron Beam in a Bend Magnet

Cited by 4 publications

References 16 publications

Investigation of the Increment of Transverse Instability of a Kiloampere Electron Beam in a Linear Induction Accelerator for Its Use in a Terahertz FEL

Investigation of the Increment of Transverse Instability of a Kiloampere Electron Beam in a Linear Induction Accelerator for Its Use in a Terahertz FEL

Energy Content and Spectral Composition of a Sub-Millimeter Radiation Flux Generated by a High-Current Electron Beam in a Plasma Column with Density Gradients

Energy Content and Spectral Composition of a Submillimeter Radiation Flux Generated by a High-Current Electron Beam in a Plasma Column With Density Gradients

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