{"title":"Phase and Group Velocities of X-ray Waves in the Pores of Track Membranes","authors":"A. V. Mitrofanov, R. M. Feshchenko","doi":"10.3103/S1068335624601468","DOIUrl":null,"url":null,"abstract":"<p>Propagation of electromagnetic hard X-ray waves inside cylindrical pores in thin polyethylene terephthalate (PET) track membranes is studied. Numerical simulation shows that both the phase and group velocities of the waves are constant over a significant part of the through pore length. In this case, the product of the phase and group velocities is equal to the square of the speed of light in vacuum. The paper analyzes the relationship between the established properties of wave velocities in pores and the properties of waveguide modes propagating in a hollow cylindrical waveguide with smooth walls. Possible applications of the observed phase properties of the pores for fabricating phase X-ray filters based on porous PET membranes are discussed.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":null,"pages":null},"PeriodicalIF":0.6000,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of the Lebedev Physics Institute","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.3103/S1068335624601468","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Propagation of electromagnetic hard X-ray waves inside cylindrical pores in thin polyethylene terephthalate (PET) track membranes is studied. Numerical simulation shows that both the phase and group velocities of the waves are constant over a significant part of the through pore length. In this case, the product of the phase and group velocities is equal to the square of the speed of light in vacuum. The paper analyzes the relationship between the established properties of wave velocities in pores and the properties of waveguide modes propagating in a hollow cylindrical waveguide with smooth walls. Possible applications of the observed phase properties of the pores for fabricating phase X-ray filters based on porous PET membranes are discussed.
研究了电磁硬 X 射线波在聚对苯二甲酸乙二酯（PET）薄履带膜圆柱形孔隙内的传播。数值模拟显示，在穿过孔隙长度的很大一部分范围内，波的相速度和群速度都是恒定的。在这种情况下，相速度和群速度的乘积等于真空中光速的平方。本文分析了孔隙中波速的既定特性与在具有光滑壁面的空心圆柱形波导中传播的波导模式特性之间的关系。论文讨论了观察到的孔隙相位特性在制造基于多孔 PET 膜的相位 X 射线滤波器中的可能应用。
期刊介绍：
Bulletin of the Lebedev Physics Institute is an international peer reviewed journal that publishes results of new original experimental and theoretical studies on all topics of physics: theoretical physics; atomic and molecular physics; nuclear physics; optics; lasers; condensed matter; physics of solids; biophysics, and others.
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