I. V. Borovitskaya, A. S. Demin, N. A. Epifanov, S. V. Latyshev, S. A. Maslyaev, E. V. Morozov, V. N. Pimenov, I. P. Sasinovskaya, G. G. Bondarenko, A. I. Gaidar
{"title":"Influence of Pulsed Beam-Plasma Impact on a Tungsten–Copper Pseudoalloy in the Plasma Focus Device","authors":"I. V. Borovitskaya, A. S. Demin, N. A. Epifanov, S. V. Latyshev, S. A. Maslyaev, E. V. Morozov, V. N. Pimenov, I. P. Sasinovskaya, G. G. Bondarenko, A. I. Gaidar","doi":"10.1134/S1027451024700721","DOIUrl":null,"url":null,"abstract":"<p>The results of a study of the combined effect on the W–Cu pseudoalloy of pulsed flows of deuterium ions with a power density of <i>q</i><sub><i>i</i></sub> ≈ 1 × 10<sup>9</sup> W/cm<sup>2</sup> at an exposure duration of τ<sub><i>i</i></sub> = 20 ns and deuterium plasma with parameters <i>q</i><sub>pl</sub> ≈ 1 × 10<sup>8</sup> W/cm<sup>2</sup> and τ<sub>pl</sub> = 20 ns generated in the “Vikhr” Plasma Focus installation are presented. It is shown that in the implemented mode of irradiation the nature of the damage to the surface layer of the tested material depends on the state of the surface of the irradiated samples and the number of pulsed impacts of energy flows. The impact of pulsed irradiation on the polished surface of pseudoalloy samples leads to the appearance of extended copper drops on the tungsten surface and to the formation of many pores, which are observed both in Cu drops and in the W matrix. In addition, microcracks appear on the W surface, as well as islands of a copper film of arbitrary configuration. Repeated irradiation of samples of the studied material with an unpolished surface leads to the formation of chains of tungsten droplets located in the upper parts of extended ridges formed during grinding of the original samples. Bursting bubbles are also visible on the irradiated surface, which arise as a result of the boiling of copper inclusions and a copper film deposited on tungsten. Clusters of such bubbles are often localized along ridges on the tungsten surface. The results obtained are discussed using numerical calculations and analysis of the thermal effect on the considered pseudoalloy under pulsed irradiation.</p>","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"18 4","pages":"974 - 982"},"PeriodicalIF":0.5000,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","FirstCategoryId":"1085","ListUrlMain":"https://link.springer.com/article/10.1134/S1027451024700721","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, CONDENSED MATTER","Score":null,"Total":0}
引用次数: 0
Abstract
The results of a study of the combined effect on the W–Cu pseudoalloy of pulsed flows of deuterium ions with a power density of qi ≈ 1 × 109 W/cm2 at an exposure duration of τi = 20 ns and deuterium plasma with parameters qpl ≈ 1 × 108 W/cm2 and τpl = 20 ns generated in the “Vikhr” Plasma Focus installation are presented. It is shown that in the implemented mode of irradiation the nature of the damage to the surface layer of the tested material depends on the state of the surface of the irradiated samples and the number of pulsed impacts of energy flows. The impact of pulsed irradiation on the polished surface of pseudoalloy samples leads to the appearance of extended copper drops on the tungsten surface and to the formation of many pores, which are observed both in Cu drops and in the W matrix. In addition, microcracks appear on the W surface, as well as islands of a copper film of arbitrary configuration. Repeated irradiation of samples of the studied material with an unpolished surface leads to the formation of chains of tungsten droplets located in the upper parts of extended ridges formed during grinding of the original samples. Bursting bubbles are also visible on the irradiated surface, which arise as a result of the boiling of copper inclusions and a copper film deposited on tungsten. Clusters of such bubbles are often localized along ridges on the tungsten surface. The results obtained are discussed using numerical calculations and analysis of the thermal effect on the considered pseudoalloy under pulsed irradiation.
期刊介绍：
Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques publishes original articles on the topical problems of solid-state physics, materials science, experimental techniques, condensed media, nanostructures, surfaces of thin films, and phase boundaries: geometric and energetical structures of surfaces, the methods of computer simulations; physical and chemical properties and their changes upon radiation and other treatments; the methods of studies of films and surface layers of crystals (XRD, XPS, synchrotron radiation, neutron and electron diffraction, electron microscopic, scanning tunneling microscopic, atomic force microscopic studies, and other methods that provide data on the surfaces and thin films). Articles related to the methods and technics of structure studies are the focus of the journal. The journal accepts manuscripts of regular articles and reviews in English or Russian language from authors of all countries. All manuscripts are peer-reviewed.
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