Control of the diocotron instability of a hollow electron beam with periodic dipole magnets

Jo, Y. H.; Kim, J. S.; Stancari, G.; Chung, M.; Lee, Hae June

doi:10.1063/1.5018425

Title: Control of the diocotron instability of a hollow electron beam with periodic dipole magnets

Journal Article · Thu Dec 28 00:00:00 EST 2017 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.5018425· OSTI ID:1373300

Jo, Y. H. ^[1]; Kim, J. S. ^[1]; Stancari, G. ^[2]; Chung, M. ^[3]; Lee, Hae June ^[1]

Pusan National Univ., Busan (Korea)
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Ulsan National Institute of Science and Technology, Ulsan (Korea)

A method to control the diocotron instability of a hollow electron beam with periodic dipole magnetic fields has been investigated by a two-dimensional particle-in-cell simulation. At first, relations between the diocotron instability and several physical parameters such as the electron number density, the current and shape of the electron beam, and the solenoidal field strength are theoretically analyzed without periodic dipole magnetic fields. Then, we study the effects of the periodic dipole magnetic fields on the diocotron instability using the two-dimensional particle-in-cell simulation. In the simulation, we considered the periodic dipole magnetic field applied along the propagation direction of the beam, as a temporally varying magnetic field in the beam frame. A stabilizing effect is observed when the oscillating frequency of the dipole magnetic field is optimally chosen, which increases with the increasing amplitude of the dipole magnetic field.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: AC02-07CH11359

OSTI ID:: 1373300

Alternate ID(s):: OSTI ID: 1415059

Report Number(s):: FERMILAB-PUB-17-273-AD-APC; 1613617

Journal Information:: Physics of Plasmas, Vol. 25, Issue 1; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 8 works

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References (19)

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