A Megawatt-Level Cusp Gun With Low Velocity Spread for W-Band Helical Gyro-TWT

被引：0

作者：

Samsonov, S. V. ^{[1
]}

Gachev, I. G. ^{[1
]}

Demikhov, E. I. ^{[2
]}

Lysenko, V. V. ^{[2
]}

机构：

[1] Russian Acad Sci, Fed Res Ctr Inst Appl Phys IAP, Nizhnii Novgorod 603950, Russia

[2] Russian Acad Sci, PN Lebedev Phys Inst LPI, Moscow 119991, Russia

来源：

IEEE TRANSACTIONS ON ELECTRON DEVICES | 2025年 / 72卷 / 01期

基金：

俄罗斯科学基金会;

关键词：

Cathodes; Coils; Magnetic fields; Electron beams; Electrons; Superconducting magnets; Solenoids; Geometry; Cyclotrons; Mathematical models; Axis-encircling electron beam; cusp gun; electron gun; electrovacuum tubes; gyrotron traveling-wave tube (gyro-TWT);

D O I：

10.1109/TED.2024.3492169

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A cusp gun has been designed for a high-power W-band gyrotron traveling-wave tube (gyro-TWT) with a helically corrugated waveguide operating at the second harmonic of the cyclotron frequency in a magnetic field of about 2 T. According to simulations performed using various software tools, the elaborated gun enables the generation of an axis-encircling electron beam with an energy of 90 keV, a pitch factor of 1.2, and a velocity spread of less than 6% at beam currents ranging from 10 to 15 A. A high beam current is achieved at a moderate cathode loading of 5 A/cm (2)due to a very wide emitting ring with a radial width of 46% of its mean radius. In the case of ideal axial symmetry, the spread of transverse velocities can be as small as 2%, owing to the positive impact of space-charge forces.

引用

页码：404 / 410

页数：7

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