American Journal of Physics and Applications

Volume 9, Issue 5, September 2021

  • Femtosecond X-ray Lasers at λ=32.8 and 44.4 nm in a Plasma Formed by Optical Field Ionization in a Krypton Cluster Jet

    Elena Ivanova

    Issue: Volume 9, Issue 5, September 2021
    Pages: 102-109
    Received: Jul. 15, 2021
    Accepted: Aug. 04, 2021
    Published: Sep. 10, 2021
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    Abstract: Due to high efficiency, X-ray lasers based on transitions of Ni-like krypton (Kr8+) are being actively studied. The main focus is on an X-ray laser based on the conventional 3d5/24d5/2 [J=0] – 3d3/24p1/2 [J=1] transition at λ=32.8 nm. Gaseous krypton targets or krypton cluster jets are used in various experiments. X-ray lasers at 32.8 nm in a plasm... Show More
  • 2D Surface Spin Waves in Dynamic Magnonic Crystals Created by a Surface Acoustic Wave in YIG Films

    Alexander V. Medved

    Issue: Volume 9, Issue 5, September 2021
    Pages: 110-115
    Received: Aug. 16, 2021
    Accepted: Sep. 16, 2021
    Published: Sep. 27, 2021
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    Abstract: Some results of the study of 2D propagation of surface magnetostatic spin waves (SMSW) in dynamic magnonic crystals (DMC) created by a surface acoustic wave (SAW) in a structure with a yttrium-iron garnet (YIG) film are presented. Such studies are interesting from the practical point of view of creating real relatively complex devices on spin waves... Show More
  • Development of a Unified Numerical Kinetic Approach, Taking into Account Many-Particle Interactions in Liquid-Vapor Systems

    Irina Shishkova, Alexei Kryukov

    Issue: Volume 9, Issue 5, September 2021
    Pages: 116-120
    Received: Sep. 04, 2021
    Accepted: Sep. 24, 2021
    Published: Sep. 30, 2021
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    Abstract: The study of evaporation and condensation should include consideration of heat and mass transfer processes inside the liquid, in the inter-phase transition domain, in the Knudsen layer, and in the outer area. Possible way to realize it is to use the conjugate approach, in which the description of these regions is carried out employing a single comp... Show More
  • Influencing Factors on Measuring Surface Residual Stress of Steel Bars by X-ray Diffraction Method

    Wu Yiwen, Li Sijin, Zhu Pei, Wang Xiaoyu

    Issue: Volume 9, Issue 5, September 2021
    Pages: 121-126
    Received: Sep. 07, 2021
    Accepted: Oct. 04, 2021
    Published: Oct. 15, 2021
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    Abstract: The surface residual stress of mechanical parts and large mechanical components has an important influence on their fatigue strength, stress corrosion resistance and service life. X-ray diffraction method is used to measure the surface residual stress of steel bars and the influence of factors such as testing methods, testing equipment status and s... Show More
  • Workflow of Fracture Prediction Using Curvature-Related Attributes and a Case Study

    Chang Deshuang, Chen Zhigang, Xu Jianguo, Han Yuchun, Sun Xing, Guo Jianming

    Issue: Volume 9, Issue 5, September 2021
    Pages: 127-132
    Received: Jul. 26, 2021
    Accepted: Aug. 04, 2021
    Published: Oct. 28, 2021
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    Abstract: Fracture is a kind of important reservoir in petroleum exploration, which usually exist in the carbonate rock or igneous rock. However, it is always difficult to predict the fracture with the seismic data. In this paper, based on curvature attributes, we develop a workflow for the prediction of fractured zone, fracture orientation, and open fractur... Show More