High current pulsed electron beam

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August undefined, 2024

WebLimits of the electron beam density in the focus are eval-uated. As it shown, the maximal beam density is achiev-able in the relativistic vacuum diode with the needle anode. In such a device, the initial emittance of a beam is rather small. The electron beam gains emittance while being fo-cused with positive ions into the anode due to collisions Web14 de abr. de 2024 · Optical drive. A VSe 2 nanosheet was attached on a horizontal polished sapphire substrate via mechanical exfoliation (ME) method, and it was …

Determination of the Pulsed Electron Beam Spectrum by Current …

Web1 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) … 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 binye recipe

A high-current micro-pulse electron gun - IEEE Xplore

Web1 de mar. de 2009 · High current pulsed electron beam (HCPEB) is a fairly new technique for surface modifications, including hardening, alloying and formation of metastable … Web8 de out. de 2003 · We study in this article the formation mechanism of craters on a metal surface during the high current pulsed electron beam processing. Based on experimental investigations and a physical model, the melting process and their temperature profiles are simulated for substrates of aluminum and steels. Initial melting positions, crater depths, … WebAfter 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 the surface of the specimens during the electron beam treatment. The surface grain grow from Cr particles because of heating by electron beam, and their size is less than 200nm. daehyon distribution inc

High Power Pulsed Electron Accelerators Development for ... - IAEA

High current pulsed electron beam

Developments of Pulsed Electron Beam Sources for High-Power …

WebNumerical simulation and experimental evidence for surface modification by high current pulsed electron beam. Hits: First Author ... Oxidation resistance of a hot-die steel (H13) … 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 …

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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 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 …

WebHigh Current Pulsed Electron Beam Generator. Abstract: A review is given of a simple and economical method of generating high current electron beams in the range of a … WebKeywords: high-current pulsed electron beam; heat-a ected zone; shock wave; thermal stress wave; grain reﬁnement 1. Introduction As an advanced surface modiﬁcation technique, high-current pulsed electron beam (HCPEB) technology has attracted scholarly attention in the ﬁeld of material surface modiﬁcation owing to the

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 … Web1Beam Technology Development Group, Bhabha Atomic Research Centre, Mumbai India-400085 Abstract High current intense electron beams were investigated earlier for Flash X-rays and nuclear electromagnetic pulse generation. Starting with moderate parameters of 200 kV, 6 kA, 60 ns pulsed electron beam source from a system

WebAfter 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 …

Web1 de jan. de 2024 · As Figures 1 and 2 show, PA6’s surface water contact angle without bombardment treatment by HCPEB is 75°, indicating that the original PA6 surface is hydrophilic. After bombarding the PA6 surface with 26 kV of high-current pulsed electron beam, the contact angle became 55°, showing increased hydrophilicity. binyon close stowmarketWeb1 de ago. de 2001 · The electron beam source, the main part of the system, produces an electron beam of low energy (10–40 keV), of high current (10 2 –10 3 A / cm 2), and with … daehwi photographyWeb13 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 … dae institute in rawalpindiWeb13 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 … biny fishWebMicrostructures of CuCr25 and CuCr50 alloys treated by high current pulsed electron beam (HCPEB) were investigated in this work. The microstructure and solidification behavior of the Cr-rich phases were characterized by scanning electron microscopy (SEM). Results show that a remelting layer of 3~5 μm is formed on the surface of Cu-Cr alloys. binyin chatgptWeb22 de nov. de 2024 · Commercial TiAlN-coated carbide tools were post-treated using the high current pulsed electron beam irradiation method. The influence of the energy … binyon insurance agencyWeb28 de mai. de 2024 · Abstract: High-current pulsed electron beam sources are the core components of high-power microwave systems. In order to meet the requirements of … binyon family eye care burien