TY - JOUR

T1 - Kinetic theory of monochromatic waves bunching in a low-voltage beam discharge in rare gases

AU - Sukhomlinov, Vladimir S.

AU - Matveev, Rustem J.

AU - Mustafaev, Alexander S.

AU - Timofeev, Nikolay A.

N1 - Publisher Copyright: © 2021 The Physical Society of the Republic of China (Taiwan)

PY - 2021/12/1

Y1 - 2021/12/1

N2 - The kinetic theory of phase focusing, that is bunching in a low-voltage beam discharge in rare gases (LVBD) during the propagation of longitudinal electrostatic oscillations at the Knudsen numbers of the order of unity have developed. The anomalous relaxation of the almost monoenergetic electron beam in momentum and energy is described for the case when this process cannot be explained by electron–atom collisions. The paper has shown the important role of electrons that have the beam energy and isotropic directional distribution, which is formed as a result of elastic collisions between the beam electrons and atoms. The dependence of the anomalous relaxation length on parameters of the LVBD in rare gases is studied. The developed theory makes it possible to quantitatively interpret experimental data on the LVBD under conditions when the electron mean free path is of the order of the interelectrode gap. According to these data, regardless of the density of the charged particles in the LVBD plasma in rare gases, five Langmuir plasma wavelengths fit along the length of the anomalous relaxation of the electron beam. The study of the electron beam dynamics laws in a plasma is important for the development of plasma-electrical devices, where the beam discharge is applied, namely: widely used all-movable stabilizers, sources of intense electromagnetic radiation, controlled elements of electronic circuits, plasma chemical reactors, etc.

AB - The kinetic theory of phase focusing, that is bunching in a low-voltage beam discharge in rare gases (LVBD) during the propagation of longitudinal electrostatic oscillations at the Knudsen numbers of the order of unity have developed. The anomalous relaxation of the almost monoenergetic electron beam in momentum and energy is described for the case when this process cannot be explained by electron–atom collisions. The paper has shown the important role of electrons that have the beam energy and isotropic directional distribution, which is formed as a result of elastic collisions between the beam electrons and atoms. The dependence of the anomalous relaxation length on parameters of the LVBD in rare gases is studied. The developed theory makes it possible to quantitatively interpret experimental data on the LVBD under conditions when the electron mean free path is of the order of the interelectrode gap. According to these data, regardless of the density of the charged particles in the LVBD plasma in rare gases, five Langmuir plasma wavelengths fit along the length of the anomalous relaxation of the electron beam. The study of the electron beam dynamics laws in a plasma is important for the development of plasma-electrical devices, where the beam discharge is applied, namely: widely used all-movable stabilizers, sources of intense electromagnetic radiation, controlled elements of electronic circuits, plasma chemical reactors, etc.

KW - Electron beam–plasma system

KW - Kinetic approach

KW - Phase focusing

KW - System instability

KW - Electron beam-plasma system

KW - INSTABILITY

KW - ELECTRON-BEAM

KW - SMALL COLD BEAM

KW - NONLINEAR-INTERACTION

KW - NUMERICAL-SIMULATION

KW - SCATTERING

UR - http://www.scopus.com/inward/record.url?scp=85116882326&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/1dcd6117-ab76-34ea-aad9-ffe3034f2ec1/

U2 - 10.1016/j.cjph.2021.06.019

DO - 10.1016/j.cjph.2021.06.019

M3 - Article

AN - SCOPUS:85116882326

VL - 74

SP - 195

EP - 208

JO - Chinese Journal of Physics

JF - Chinese Journal of Physics

SN - 0577-9073

ER -