Research output: Contribution to journal › Article › peer-review
Numerical simulations of a continuously injected relativistic electron beam relaxation into a plasma with large-scale density gradients. / Annenkov, Vladimir; Volchok, Evgeniia.
In: Advances in Space Research, Vol. 71, No. 4, 15.02.2023, p. 1948-1961.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Numerical simulations of a continuously injected relativistic electron beam relaxation into a plasma with large-scale density gradients
AU - Annenkov, Vladimir
AU - Volchok, Evgeniia
N1 - Funding Information: The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: [Vladimir Annenkov reports financial support was provided by Ministry of Science and Higher Education of the Russian Federation. Evgeniia Volchok reports financial support was provided by Ministry of Science and Higher Education of the Russian Federation.] Funding Information: This work was supported by the grant MK-2676.2021.1.2 by Ministry of Science and Higher Education of the Russian Federation. Simulations were performed using the computing resources of the Center for Scientific IT-services ICT SB RAS. Publisher Copyright: © 2022 COSPAR
PY - 2023/2/15
Y1 - 2023/2/15
N2 - In this paper the influence of large-scale decreasing and increasing gradients of the density of magnetized plasma on the relaxation process of a continuously injected relativistic electron beam with an energy of 660 keV (vb=0.9c) and a pitch-angle distribution is studied using particle-in-cell numerical simulations. It is found that for the selected parameters in the case of a smoothly decreasing gradient and in a homogeneous plasma the formation of spatially limited plasma oscillations of large amplitude occurs. In such cases, modulation instability develops and a long-wave longitudinal modulation of the ion density is formed. In addition, the large amplitude of plasma waves accelerates plasma electrons to energies on the order of the beam energy. In the case of increasing and sharply decreasing gradients, a significant decrease in the amplitude of plasma oscillations and the formation of a turbulent ion density spectrum are observed. The possibility of acceleration of beam electrons to energies more than 2 times higher than the initial energy of the beam particles is also demonstrated. This process takes place not only during beam propagation in growing plasma density, but also in homogeneous plasma due to interaction of beam particles with plasma oscillations of large amplitude.
AB - In this paper the influence of large-scale decreasing and increasing gradients of the density of magnetized plasma on the relaxation process of a continuously injected relativistic electron beam with an energy of 660 keV (vb=0.9c) and a pitch-angle distribution is studied using particle-in-cell numerical simulations. It is found that for the selected parameters in the case of a smoothly decreasing gradient and in a homogeneous plasma the formation of spatially limited plasma oscillations of large amplitude occurs. In such cases, modulation instability develops and a long-wave longitudinal modulation of the ion density is formed. In addition, the large amplitude of plasma waves accelerates plasma electrons to energies on the order of the beam energy. In the case of increasing and sharply decreasing gradients, a significant decrease in the amplitude of plasma oscillations and the formation of a turbulent ion density spectrum are observed. The possibility of acceleration of beam electrons to energies more than 2 times higher than the initial energy of the beam particles is also demonstrated. This process takes place not only during beam propagation in growing plasma density, but also in homogeneous plasma due to interaction of beam particles with plasma oscillations of large amplitude.
KW - Electron beams
KW - Particle acceleration
KW - Plasma
KW - Sun
KW - Two-stream instability
KW - Waves
UR - http://www.scopus.com/inward/record.url?scp=85137018018&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/32b048e9-bcfb-3f1e-a1c3-b5030c8ffb9b/
U2 - 10.1016/j.asr.2022.08.036
DO - 10.1016/j.asr.2022.08.036
M3 - Article
AN - SCOPUS:85137018018
VL - 71
SP - 1948
EP - 1961
JO - Advances in Space Research
JF - Advances in Space Research
SN - 0273-1177
IS - 4
ER -
ID: 37081754