2024 High current pulsed electron beam

High current pulsed electron beam

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August undefined, 2024

Webinteraction of pulsed electron beams of moderate power density with metals, are far from being solved completely. The electron guns with an anode and an explosive-emission cathode are the most appropriate systems for the production of high-current pulsed electron beams (Li et al., 2008c, 2009e; Tarasenko et al., 2008). The beam power is Web12 de dez. de 2024 · Although the SC effect occurs under high charge conditions, a component of the interference fringe remained. Consequently, despite the high current …

Layer structure, plasma jet, and thermal dynamics of Cu target ...

WebThe thermal imaging diagnostics of measuring pulsed electron beam energy density is presented. ... Thermal imaging diagnostics of high-current electron beams Rev Sci Instrum. 2012 Oct;83(10):103301. doi: 10.1063/1.4756689. Authors A Pushkarev 1 , G Kholodnaya, R Sazonov, D Ponomarev. Affiliation 1 Tomsk ... Web13 de mar. de 2024 · It is shown that the exposure of the AISI 310 to high-current pulsed electron beam results in a high-speed melting of the surface layer, creates the … recover excel deleted files from recycle bin

Low energy high current pulsed electron beam treatment for …

Web20 de mai. de 1993 · A novel concept for a high-current-density micro-pulse electron gun has been studied. The concept employs the resonant amplification of an electron current by secondary electron emission in an RF cavity. We have studied this "multipacting" process in detail, including space charge, and have found the parameters necessary to … Web1 de dez. de 2012 · @article{Li2012DevelopmentMO, title={Development mechanism of cathode surface plasmas of high current pulsed electron beam sources for microwave irradiation generation}, author={Limin Li and Lei Lei Chang and L Zhang and Jinliang Liu and G. Chen and Jianchun Wen}, journal={Laser and Particle Beams}, year={2012}, … Web29 de set. de 2024 · The algorithm and results of calculating the integral and differential energy spectra of a pulsed electron beam (350–500 keV, … u of m medical center minneapolis mn

Limits of Plasma Focusing of High Current Electron Beams

High Chrome Steel Modified by High-Current Pulsed Electron …

Web1 de abr. de 2024 · In this paper, high-current pulsed electron beam (HCPEB) irradiation was used as surface alloying of chromium/copper (Cr/Cu) system to improve the surface … Web8 de nov. de 2024 · High-current pulse electron beam (HCPEB) is an advanced surface modification technology developed in recent decades. This paper focuses on the effect of 0.3 wt.% graphene on the electrical conductivity and microhardness of HCPEB-treated Al-20TiC composites. The SEM results show that the titanium carbide was uniformly … recover excel file clicked don\u0027t saveWeb10 de jun. de 2024 · Abstract. X-ray diffraction analysis, optical metallography, and transmission electron microscopy demonstrated that irradiation with high-current pulsed electron beams in the melting mode leads to formation of residual compressive stresses and a finely dispersed globular-lamellar microstructure (the α, α', and α'' plates being … u of m medical center mn

"Web13 de abr. de 2024 · We study the formation of a high-current electron beam with a duration of 1 ns in a magnetically insulated coaxial diode with a cold cathode under varying residual gas pressure. It is demonstrated that before the transition from explosive electron emission in vacuum to the electron runaway regime in a gas, an increase in the beam … " - High current pulsed electron beam

High current pulsed electron beam

Short High-Current Electron Beams and High-Powermicrowave …

Web12 de dez. de 2024 · Although the SC effect occurs under high charge conditions, a component of the interference fringe remained. Consequently, despite the high current density, the pulsed electron beam emitted from the PC has sufficient coherence to realize time-resolved holography that can be used to temporally analyze phase information. Web7 de abr. de 2024 · A high output power and a high pulse energy can significantly enhance the scope of applications of the intense electron beam accelerator (IEBA) in physical …

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Web1 de jan. de 2024 · The electron beam is generated by “pseudo-spark” discharge device and characterized by high current (hundreds of amperes to thousands of amperes), … Web1 de mar. de 2016 · A high-current electron beam is extracted from the plasma layer and is accelerated by the strong diode electric field. Further, an increase of the time interval …

Web15 de set. de 2009 · @misc{etde_21485935, title = {Irradiation effect of high current pulsed electron beam on surface structure and mechanical properties of NiCoCrAlY} author = {Zhong, Wang, Xianxiu, Mei, Cunxia, Wang, Wenfei, Sun, Shengzhi, Hao, Ying, Qin, Chuang, Dong, and Hongchen, Wu} abstractNote = {DZ4 substrates were coated … WebHigh current pulsed electron beam (HCPEB) is a new type of surface modification technology [19, 20, 21]. During the instantaneous process of HCPEB bombardment, the higher energy (10 7 –10 9 W/cm 2 ) acts on the surface of the material in a very short time (several microseconds), resulting in extremely rapid heating, cooling, melting, and even …

WebIn this study, we present the results of the effect of duplex surface modification of 304-L stainless steel substrates by an electron-beam treatment (EBT) and subsequent deposition of diamond-like carbon coatings on the surface roughness and corrosion behavior. During the EBT process, the beam power was varied from 1000 to 1500 W. The successful … WebThe fracture dynamics of transparent polymeric materials under the impact of shockwaves induced by the energy release due to a high-power electron beam has been studied in …

WebThe characterization of a high current, relativistic electron beam, designated the Super Pinch electron beam, has been performed using compact pulsed-power accelerators of …

Web27 de abr. de 2004 · Physical models and numerical simulations are used to describe the thermal-mechanical process induced by high current pulsed electron beam (energy E=10–40 keV, energy density in a pulse S=1–6 J/cm 2, pulse duration τ=0.5–5 μs) irradiation. The temperature simulation reveals ultrahigh heating and cooling rates on the … recover excel saved as csvWeb13 de abr. de 2024 · In O-type devices an electron beam drifts in the same direction as the applied magnetic field. Among them, the O-type slow-wave devices use the axial slow-wave structure to achieve electron beam clustering and beam interaction. Both beam-forming methods are based on the conversion of a circular electron beam from a conventional … u of m medicine logoWebAfter high current pulsed electron beam treatment, many cracks are found on surface. The main reason is possibly due to the quasi-static thermal stresses accumulated along … recover exif dataWeb1 de ago. de 2016 · In order to realize a uniform high current pulsed electron beam irradiation for a circular component, we designed an annular cathode for HCPEB … recover excel worksheet not savedWeb30 de jan. de 2003 · It can produce electron beam of low-energy (10–40 keV), high peak current (10 2 –10 3 A/cm 2 ), short pulse duration (5 μs), and high efficiency (repeating pulse interval being 10 s). The electron beam is generated by an explosive emission … u of m medicine flintWeb1 de out. de 2004 · Physical models and numerical simulations are applied to describe the thermal–dynamical processes of the high current pulsed electron beam (HCPEB) … recover ezy boat latchWebThe diagnostics is based on the thermal imager registration of the imaging electron beam thermal print in a material with low bulk density and low thermal conductivity. Testing of … recover ext3 raid 5