Publication: Expansion opacity in laboratory conditions
Дата
2021
Авторы
Glazyrin, S. I.
Blinnikov, S. I.
Roudskoy, I. V.
Rosmej, O. N.
Golubev, A. A.
Pikuz, S. A.
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Аннотация
© 2021 Author(s).Radiation-matter interaction depends mainly on the state of matter (its density, temperature, etc.), and also on the radiation spectrum. The opacity of thick plasma also depends on plasma velocity - the Doppler effect shifts atomic lines. For the cases when there are many bound-bound transitions, i.e., the plenty of lines contribute to the opacity, the latter is enhanced when the plasma expands with a nonuniform velocity field. It is known as "expansion opacity"in the literature. Existing models are discrepant and predict diverse results in some cases. Here, we present a rigorous derivation of the effect and show that the effect is available for experimental study at modern laser facilities. The plasma created by a Cu target irradiated with an ∼ 100 J nanosecond laser pulse is rich in lines and has enough expansion velocity so that its opacity is increased in the spectral range ∼ 10 2 - 10 3 eV by the order of magnitude. The possible experimental measurement of the effect is briefly discussed.
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Цитирование
Expansion opacity in laboratory conditions / Glazyrin, S.I. [et al.] // Physics of Plasmas. - 2021. - 28. - № 2. - 10.1063/5.0030792
URI
https://www.doi.org/10.1063/5.0030792
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https://www.scopus.com/record/display.uri?eid=2-s2.0-85100343968&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000629785000001
https://openrepository.mephi.ru/handle/123456789/23638