Electron emission and plasma generation in a modulator electron gun using ferroelectric cathode

2006 ◽  
Vol 566 (2) ◽  
pp. 662-667 ◽  
Author(s):  
Shutao Chen ◽  
Shuxin Zheng ◽  
Ziqiu Zhu ◽  
Xianlin Dong ◽  
Chuanxiang Tang
Keyword(s):  
Electron Emission ◽  
Electron Gun ◽  
Plasma Generation ◽  
Ferroelectric Cathode

High-power microwave generation using a ferroelectric cathode electron gun

2001 ◽  
Vol 29 (4) ◽  
pp. 599-603 ◽  
Author(s):  
Y. Hayashi ◽  
X. Song ◽  
J.D. Ivers ◽  
D.D. Flechtner ◽  
J.A. Nation ◽  
...  
Keyword(s):  
High Power ◽  
Electron Gun ◽  
High Power Microwave ◽  
Microwave Generation ◽  
Ferroelectric Cathode ◽  
Power Microwave

Ferroelectric Cathode Electron Emission Dependence on Magnetic Field

2014 ◽  
Vol 61 (12) ◽  
pp. 4268-4272 ◽  
Author(s):  
Yafit Orbach ◽  
Moritz Pilossof ◽  
Moshe Einat
Keyword(s):  
Magnetic Field ◽  
Electron Emission ◽  
Ferroelectric Cathode

scholarly journals Efficiency of electron beam extraction to the atmosphere in an accelerator based on ion-electron emission

2021 ◽  
Vol 2064 (1) ◽  
pp. 012116
Author(s):  
S Yu Doroshkevich ◽  
M S Vorobyov ◽  
M S Torba ◽  
N N Koval ◽  
S A Sulakshin ◽  
...  
Keyword(s):  
Electron Beam ◽  
Electron Emission ◽  
Ambient Atmosphere ◽  
Beam Extraction ◽  
Periodic Mode ◽  
Extraction Coefficient ◽  
Plasma Generation ◽  
Average Value ◽  
Generation Mode ◽  
Discharge Parameters

Abstract The use of a modern element base makes it possible to create power supplies with a transition from a direct mode of generation of an auxiliary discharge to a pulse-periodic mode with a pulse repetition rate at the level of several tens of kHz. This allows for a more flexible adjustment of the discharge parameters, keeping the average value of its current, but changing its amplitude with a corresponding change in the pulse duty cycle. In this work, using an electron accelerator based on ion-electron emission, generating a wide-aperture electron beam, we research the effect of auxiliary discharge generation mode (direct and pulse-periodic) on the efficiency of electron beam extraction into the ambient atmosphere. It is shown that, in a direct mode of electron beam generation at an accelerating voltage of 150 kV, the beam extraction coefficient does not exceed 0.25. The possibility of increasing the extraction coefficient to K = 0.55 at the same accelerating voltage of 150 kV was demonstrated without making changes to the design of the accelerator, but switching to a pulsed-periodic mode of emission plasma generation.

Strong Electron Emission from Ferroelectric Cathode

2006 ◽  
Vol 45 (12) ◽  
pp. 9185-9193 ◽  
Author(s):  
Yasushi Hayashi ◽  
Eiki Hotta
Keyword(s):  
Electron Emission ◽  
Strong Electron ◽  
Ferroelectric Cathode

scholarly journals Laser plasma generation and plasma interaction with ablative target

2007 ◽  
Vol 25 (1) ◽  
pp. 53-63 ◽  
Author(s):  
ISAK I. BEILIS
Keyword(s):  
Laser Radiation ◽  
Electron Emission ◽  
Laser Energy ◽  
Plasma Heating ◽  
Target Surface ◽  
Space Region ◽  
Large Contribution ◽  
Plasma Generation ◽  
Plasma Energy ◽  
Electrons And Ions

The model of plasma production by laser radiation onto a solid target was developed taking into account plasma heating by the emitted electrons and target heating by ion bombardment, as well as by the laser radiation. The near target plasma structure was analyzed. The space charge sheath was studied solving the Poisson equation and taking into account the volume charge of accelerated electrons and ions. The kinetics of atoms evaporated from the target and the back-flow of atoms and ions from the plasma towards the surface was analyzed. A system of equations, including equations for solid heat conduction, plasma generation and the plasma expansion was formulated. The calculation for Cu target, laser spot radius 100 μm, pulse duration 1 ms, 103, 10, 1ns and laser power density qL = 10−3–1 GW/cm2 was conducted. The ratio of net evaporation rate to the total evaporated mass flux was determined. It was shown that the plasma mainly generated in the electron emission beam relaxation region and there the plasma flow is subsonic. The electric field at the target surface is relatively large and therefore the ion current to the surface in the space region is large and comparable with the electron emission current. A large contribution of the plasma energy flux in the target heat regime was obtained, showing that the laser generated plasma significantly converts the absorbed laser energy to kinetic and potential energy of the plasma particles, which transport part of the energy through the electrostatic sheath to the solid surface.

Electron Emission Characteristic Study of Cylindrical Ferroelectric Cathode

2010 ◽  
Vol 408 (1) ◽  
pp. 112-119 ◽  
Author(s):  
Shuai Tang ◽  
Yujun Feng ◽  
Haobo Ma ◽  
Zhuo Xu
Keyword(s):  
Electron Emission ◽  
Emission Characteristic ◽  
Ferroelectric Cathode
Sign in / Sign up

Export Citation Format

Share Document