The Measurement of 2-D Density Distribution at the Downstream of a Micronozzle of a Spacecraft Using Electron Beam Induced Fluorescence

2021 ◽  
Vol 69 (6) ◽  
pp. 219-228
Author(s):  
Sota Izawa ◽  
Keita Nishii ◽  
Hiroyuki Koizumi ◽  
Kimiya Komurasaki
Keyword(s):  
Electron Beam ◽  
Density Distribution

Preliminary study on space density distribution of intense electron beam in foilless diode

2014 ◽  
Vol 26 (4) ◽  
pp. 43006
Author(s):  
霍少飞 Huo Shaofei ◽  
孙钧 Sun Jun ◽  
陈昌华 Chen Changhua ◽  
梁玉钦 Liang Yuqin ◽  
吴平 Wu Ping ◽  
...  
Keyword(s):  
Electron Beam ◽  
Density Distribution ◽  
Space Density ◽  
Intense Electron Beam ◽  
Preliminary Study ◽  
Intense Electron

scholarly journals Energy density distribution of a modulated electron beam in a source with a plasma cathode based on a low pressure arc

2021 ◽  
Vol 2064 (1) ◽  
pp. 012066
Author(s):  
V I Shin ◽  
P V Moskvin ◽  
M S Vorobyov ◽  
V N Devyatkov ◽  
N N Koval
Keyword(s):  
Electron Beam ◽  
Energy Density ◽  
Density Distribution ◽  
Current Pulse ◽  
Current Density ◽  
Beam Current ◽  
Beam Current Pulse ◽  
Energy Density Distribution ◽  
Electron Beam Generation ◽  
Arc Current

Abstract The article presents the results of studies devoted to the study of the energy density distribution in the amplitude-modulated regime of electron beam generation. It is shown that in the first ≈ 50 μs of the duration of the beam current pulse, its spatial rearrangement occurs, due to the development of the arc discharge current. Thus, the rearrangement of the arc current, which develops from the axis of the system, leads to an axial diving of the emission current density and the beam current density on the target. With the development of the arc current, the energy density on the target on the axis of the system decreases and after ≈ 50 μs takes on a steady-state value, which can change only as a result of a change in the conditions for generating an electron beam or the transition to a modulated regime of electron beam generation. It has been experimentally shown using calorimetric measurements that the shape of the electron beam current pulse with its amplitude modulation with a pulse duration of more than 100 μs has little effect on the distribution of the beam energy density in the target region.

Electron beam welding with programming of beam power density distribution

2020 ◽  
Vol 2020 (1) ◽  
pp. 49-53
Author(s):  
V.V. Skryabinskyi ◽  
◽  
V.M. Nesterenkov ◽  
M.O. Rusynyk ◽  
◽  
...  
Keyword(s):  
Electron Beam ◽  
Density Distribution ◽  
Power Density ◽  
Electron Beam Welding ◽  
Beam Power ◽  
Power Density Distribution

Study on current density distribution of electron beam spots by wave optics theory

Optik ◽  
2009 ◽  
Vol 120 (5) ◽  
pp. 207-211 ◽  
Author(s):  
Xiaoli Guo ◽  
Tiantong Tang ◽  
Yongfeng Kang ◽  
Yan Ren
Keyword(s):  
Electron Beam ◽  
Density Distribution ◽  
Current Density ◽  
Current Density Distribution ◽  
Wave Optics

Excitation density distribution in electron-beam-pumped ZnSe semiconductor lasers

2008 ◽  
Vol 38 (12) ◽  
pp. 1097-1100 ◽  
Author(s):  
E N Donskoi ◽  
E V Zhdanova ◽  
A N Zalyalov ◽  
M M Zverev ◽  
S V Ivanov ◽  
...  
Keyword(s):  
Electron Beam ◽  
Density Distribution ◽  
Semiconductor Lasers ◽  
Excitation Density

scholarly journals Study of Density Distribution in Entrained Plasma

2007 ◽  
Vol 4 (2) ◽  
pp. 305-309
Author(s):  
Baghdad Science Journal
Keyword(s):  
Electron Beam ◽  
Numerical Analysis ◽  
Density Distribution ◽  
Electron Density ◽  
Theoretical Investigation ◽  
Electron Beams ◽  
Density Ratio ◽  
Plasma Region ◽  
Beam Density

A theoretical investigation is carried out to study the effect of a pencil electron beam propagating inside the plasma region determining the hydrodynamic densities distribution with the aid of numerical analysis finite deference method (FDM).The plasma is generated and trapped by annular electron beams of fixed electron density 1x1014 m-3. The result of the study shows that the hydrodynamic density behaves as the increase in pencil electron beam. The hydrodynamic density ratio goes to more than double as the increase in pencil electron beam density to 1x1018 m-3.

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