TY - JOUR

T1 - Formation of space-charge bunches in a multivelocity-electron-beam-based microwave oscillator with a cathode unshielded from the magnetic field

AU - Kalinin, Yu A.

AU - Starodubov, A. V.

AU - Fokin, A. S.

PY - 2017/2/1

Y1 - 2017/2/1

N2 - The influence of the magnitude and configuration of the magnetic field on the parameters of electron bunches formed in a multivelocity electron beam is analyzed. It is shown that the use of a cathode unshielded from the magnetic field and a nonuniform magnetic field increasing along the drift space enables the formation of compact electron bunches. The ratio between the current density in such bunches and the beam current density at the entrance to the drift space reaches 106, which results in a substantial broadening of the output microwave spectrum due to an increase in the amplitudes of the higher harmonics of the fundamental frequency.

AB - The influence of the magnitude and configuration of the magnetic field on the parameters of electron bunches formed in a multivelocity electron beam is analyzed. It is shown that the use of a cathode unshielded from the magnetic field and a nonuniform magnetic field increasing along the drift space enables the formation of compact electron bunches. The ratio between the current density in such bunches and the beam current density at the entrance to the drift space reaches 106, which results in a substantial broadening of the output microwave spectrum due to an increase in the amplitudes of the higher harmonics of the fundamental frequency.

UR - http://www.scopus.com/inward/record.url?scp=85015883520&partnerID=8YFLogxK

U2 - 10.1134/S1063780X17020076

DO - 10.1134/S1063780X17020076

M3 - Article

AN - SCOPUS:85015883520

VL - 43

SP - 191

EP - 195

JO - Plasma Physics Reports

JF - Plasma Physics Reports

SN - 1063-780X

IS - 2

ER -